CVE-2023-2516 (published 2023-05-05T19:15Z)

Cross-site Scripting (XSS) - Stored in GitHub repository nilsteampassnet/teampass prior to 3.0.7.

CVSS v3 base score: 5.4, MEDIUM (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N)

Weakness information:
cwe_id: CWE-79
cwe_name: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
description: The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
extended_description: 
            Cross-site scripting (XSS) vulnerabilities occur when:
            
               Untrusted data enters a web application, typically from a web request.
               The web application dynamically generates a web page that contains this untrusted data.
               During page generation, the application does not prevent the data from containing content that is executable by a web browser, such as JavaScript, HTML tags, HTML attributes, mouse events, Flash, ActiveX, etc.
               A victim visits the generated web page through a web browser, which contains malicious script that was injected using the untrusted data.
               Since the script comes from a web page that was sent by the web server, the victim's web browser executes the malicious script in the context of the web server's domain.
               This effectively violates the intention of the web browser's same-origin policy, which states that scripts in one domain should not be able to access resources or run code in a different domain.
            
            There are three main kinds of XSS:
            
               
                  Type 1: Reflected XSS (or Non-Persistent) - 
         			The server reads data directly from the HTTP request and reflects it back in the HTTP response. Reflected XSS exploits occur when an attacker causes a victim to supply dangerous content to a vulnerable web application, which is then reflected back to the victim and executed by the web browser. The most common mechanism for delivering malicious content is to include it as a parameter in a URL that is posted publicly or e-mailed directly to the victim. URLs constructed in this manner constitute the core of many phishing schemes, whereby an attacker convinces a victim to visit a URL that refers to a vulnerable site. After the site reflects the attacker's content back to the victim, the content is executed by the victim's browser.
               
                  Type 2: Stored XSS (or Persistent) - 
               The application stores dangerous data in a database, message forum, visitor log, or other trusted data store. At a later time, the dangerous data is subsequently read back into the application and included in dynamic content. From an attacker's perspective, the optimal place to inject malicious content is in an area that is displayed to either many users or particularly interesting users. Interesting users typically have elevated privileges in the application or interact with sensitive data that is valuable to the attacker. If one of these users executes malicious content, the attacker may be able to perform privileged operations on behalf of the user or gain access to sensitive data belonging to the user. For example, the attacker might inject XSS into a log message, which might not be handled properly when an administrator views the logs.
            
               
                  Type 0: DOM-Based XSS - 
               In DOM-based XSS, the client performs the injection of XSS into the page; in the other types, the server performs the injection. DOM-based XSS generally involves server-controlled, trusted script that is sent to the client, such as Javascript that performs sanity checks on a form before the user submits it. If the server-supplied script processes user-supplied data and then injects it back into the web page (such as with dynamic HTML), then DOM-based XSS is possible.
            
            
            Once the malicious script is injected, the attacker can perform a variety of malicious activities. The attacker could transfer private information, such as cookies that may include session information, from the victim's machine to the attacker. The attacker could send malicious requests to a web site on behalf of the victim, which could be especially dangerous to the site if the victim has administrator privileges to manage that site. Phishing attacks could be used to emulate trusted web sites and trick the victim into entering a password, allowing the attacker to compromise the victim's account on that web site. Finally, the script could exploit a vulnerability in the web browser itself possibly taking over the victim's machine, sometimes referred to as "drive-by hacking."
            In many cases, the attack can be launched without the victim even being aware of it. Even with careful users, attackers frequently use a variety of methods to encode the malicious portion of the attack, such as URL encoding or Unicode, so the request looks less suspicious.
         
         

Fix information:
repo_url: https://github.com/nilsteampassnet/teampass
commit_details: repo_url: https://github.com/nilsteampassnet/teampass
author: nilsteampassnet
author_date: 2023-05-02 08:30:07+02:00
msg: 3.0.7

Added purify library to fix potentiel xss
repository: repo_url: https://github.com/nilsteampassnet/teampass
repo_name: nilsteampassnet/TeamPass
description: Collaborative Passwords Manager
repo_language: PHP
owner: nilsteampassnet
file_changes: filename: index.php
change_type: ModificationType.MODIFY
diff: @@ -1154,6 +1154,8 @@ if (($session_validite_pw === null
     <script type="text/javascript" src="./plugins/icheck/icheck.min.js"></script>
     <!-- bootstrap-add-clear -->
     <script type="text/javascript" src="plugins/bootstrap-add-clear/bootstrap-add-clear.min.js"></script>
+    <!-- DOMPurify -->
+    <script type="text/javascript" src="plugins/DOMPurify/purify.min.js"></script>
 
     <?php
     $get = [];

programming_language: PHP
filename: items.js.php
change_type: ModificationType.MODIFY
diff: @@ -2795,30 +2795,30 @@ $var['hidden_asterisk'] = '<i class="fas fa-asterisk mr-2"></i><i class="fas fa-
                 var data = {
                     'anyone_can_modify': $('#form-item-anyoneCanModify').is(':checked') ? 1 : 0,
                     'complexity_level': parseInt($('#form-item-password-complex').val()),
-                    'description': $('#form-item-description').summernote('code') !== "<p><br></p>" ? $('#form-item-description').summernote('code') : '',
+                    'description': $('#form-item-description').summernote('code') !== "<p><br></p>" ? DOMPurify.sanitize($('#form-item-description').summernote('code'), {USE_PROFILES: {html: true}}) : '',
                     'diffusion_list': diffusion,
                     'diffusion_list_names': diffusionNames,
                     'folder': parseInt($('#form-item-folder').val()),
-                    'email': $('#form-item-email').val(),
+                    'email': DOMPurify.sanitize($('#form-item-email').val()),
                     'fields': fields,
                     'folder_is_personal': store.get('teampassItem').IsPersonalFolder === 1 ? 1 : 0,
                     'id': store.get('teampassItem').id,
-                    'label': $('#form-item-label').val(),
-                    'login': $('#form-item-login').val(),
+                    'label': DOMPurify.sanitize($('#form-item-label').val()),
+                    'login': DOMPurify.sanitize($('#form-item-login').val()),
                     'pw': $('#form-item-password').val(),
                     'restricted_to': restriction,
                     'restricted_to_roles': restrictionRole,
-                    'tags': $('#form-item-tags').val(),
+                    'tags': DOMPurify.sanitize($('#form-item-tags').val()),
                     'template_id': parseInt($('input.form-check-input-template:checkbox:checked').data('category-id')),
                     'to_be_deleted_after_date': ($('#form-item-deleteAfterDate').length !== 0 &&
                         $('#form-item-deleteAfterDate').val() !== '') ? $('#form-item-deleteAfterDate').val() : '',
                     'to_be_deleted_after_x_views': ($('#form-item-deleteAfterShown').length !== 0 &&
                             $('#form-item-deleteAfterShown').val() !== '' && $('#form-item-deleteAfterShown').val() >= 1) ?
                         parseInt($('#form-item-deleteAfterShown').val()) : '',
-                    'url': $('#form-item-url').val(),
+                    'url': DOMPurify.sanitize($('#form-item-url').val()),
                     'user_id': parseInt('<?php echo $_SESSION['user_id']; ?>'),
                     'uploaded_file_id': store.get('teampassApplication').uploadedFileId === undefined ? '' : store.get('teampassApplication').uploadedFileId,
-                    'fa_icon': $('#form-item-icon').val(),
+                    'fa_icon': DOMPurify.sanitize($('#form-item-icon').val()),
                 };
                 if (debugJavascript === true) {
                     console.log('SAVING DATA');

programming_language: JavaScript
filename: purify.cjs.js
change_type: ModificationType.ADD
diff: @@ -0,0 +1,1597 @@
+/*! @license DOMPurify 3.0.2 | (c) Cure53 and other contributors | Released under the Apache license 2.0 and Mozilla Public License 2.0 | github.com/cure53/DOMPurify/blob/3.0.2/LICENSE */
+
+'use strict';
+
+const {
+  entries,
+  setPrototypeOf,
+  isFrozen,
+  getPrototypeOf,
+  getOwnPropertyDescriptor
+} = Object;
+let {
+  freeze,
+  seal,
+  create
+} = Object; // eslint-disable-line import/no-mutable-exports
+
+let {
+  apply,
+  construct
+} = typeof Reflect !== 'undefined' && Reflect;
+
+if (!apply) {
+  apply = function apply(fun, thisValue, args) {
+    return fun.apply(thisValue, args);
+  };
+}
+
+if (!freeze) {
+  freeze = function freeze(x) {
+    return x;
+  };
+}
+
+if (!seal) {
+  seal = function seal(x) {
+    return x;
+  };
+}
+
+if (!construct) {
+  construct = function construct(Func, args) {
+    return new Func(...args);
+  };
+}
+
+const arrayForEach = unapply(Array.prototype.forEach);
+const arrayPop = unapply(Array.prototype.pop);
+const arrayPush = unapply(Array.prototype.push);
+const stringToLowerCase = unapply(String.prototype.toLowerCase);
+const stringToString = unapply(String.prototype.toString);
+const stringMatch = unapply(String.prototype.match);
+const stringReplace = unapply(String.prototype.replace);
+const stringIndexOf = unapply(String.prototype.indexOf);
+const stringTrim = unapply(String.prototype.trim);
+const regExpTest = unapply(RegExp.prototype.test);
+const typeErrorCreate = unconstruct(TypeError);
+function unapply(func) {
+  return function (thisArg) {
+    for (var _len = arguments.length, args = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
+      args[_key - 1] = arguments[_key];
+    }
+
+    return apply(func, thisArg, args);
+  };
+}
+function unconstruct(func) {
+  return function () {
+    for (var _len2 = arguments.length, args = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
+      args[_key2] = arguments[_key2];
+    }
+
+    return construct(func, args);
+  };
+}
+/* Add properties to a lookup table */
+
+function addToSet(set, array, transformCaseFunc) {
+  transformCaseFunc = transformCaseFunc ? transformCaseFunc : stringToLowerCase;
+
+  if (setPrototypeOf) {
+    // Make 'in' and truthy checks like Boolean(set.constructor)
+    // independent of any properties defined on Object.prototype.
+    // Prevent prototype setters from intercepting set as a this value.
+    setPrototypeOf(set, null);
+  }
+
+  let l = array.length;
+
+  while (l--) {
+    let element = array[l];
+
+    if (typeof element === 'string') {
+      const lcElement = transformCaseFunc(element);
+
+      if (lcElement !== element) {
+        // Config presets (e.g. tags.js, attrs.js) are immutable.
+        if (!isFrozen(array)) {
+          array[l] = lcElement;
+        }
+
+        element = lcElement;
+      }
+    }
+
+    set[element] = true;
+  }
+
+  return set;
+}
+/* Shallow clone an object */
+
+function clone(object) {
+  const newObject = create(null);
+
+  for (const [property, value] of entries(object)) {
+    newObject[property] = value;
+  }
+
+  return newObject;
+}
+/* This method automatically checks if the prop is function
+ * or getter and behaves accordingly. */
+
+function lookupGetter(object, prop) {
+  while (object !== null) {
+    const desc = getOwnPropertyDescriptor(object, prop);
+
+    if (desc) {
+      if (desc.get) {
+        return unapply(desc.get);
+      }
+
+      if (typeof desc.value === 'function') {
+        return unapply(desc.value);
+      }
+    }
+
+    object = getPrototypeOf(object);
+  }
+
+  function fallbackValue(element) {
+    console.warn('fallback value for', element);
+    return null;
+  }
+
+  return fallbackValue;
+}
+
+const html$1 = freeze(['a', 'abbr', 'acronym', 'address', 'area', 'article', 'aside', 'audio', 'b', 'bdi', 'bdo', 'big', 'blink', 'blockquote', 'body', 'br', 'button', 'canvas', 'caption', 'center', 'cite', 'code', 'col', 'colgroup', 'content', 'data', 'datalist', 'dd', 'decorator', 'del', 'details', 'dfn', 'dialog', 'dir', 'div', 'dl', 'dt', 'element', 'em', 'fieldset', 'figcaption', 'figure', 'font', 'footer', 'form', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'head', 'header', 'hgroup', 'hr', 'html', 'i', 'img', 'input', 'ins', 'kbd', 'label', 'legend', 'li', 'main', 'map', 'mark', 'marquee', 'menu', 'menuitem', 'meter', 'nav', 'nobr', 'ol', 'optgroup', 'option', 'output', 'p', 'picture', 'pre', 'progress', 'q', 'rp', 'rt', 'ruby', 's', 'samp', 'section', 'select', 'shadow', 'small', 'source', 'spacer', 'span', 'strike', 'strong', 'style', 'sub', 'summary', 'sup', 'table', 'tbody', 'td', 'template', 'textarea', 'tfoot', 'th', 'thead', 'time', 'tr', 'track', 'tt', 'u', 'ul', 'var', 'video', 'wbr']); // SVG
+
+const svg$1 = freeze(['svg', 'a', 'altglyph', 'altglyphdef', 'altglyphitem', 'animatecolor', 'animatemotion', 'animatetransform', 'circle', 'clippath', 'defs', 'desc', 'ellipse', 'filter', 'font', 'g', 'glyph', 'glyphref', 'hkern', 'image', 'line', 'lineargradient', 'marker', 'mask', 'metadata', 'mpath', 'path', 'pattern', 'polygon', 'polyline', 'radialgradient', 'rect', 'stop', 'style', 'switch', 'symbol', 'text', 'textpath', 'title', 'tref', 'tspan', 'view', 'vkern']);
+const svgFilters = freeze(['feBlend', 'feColorMatrix', 'feComponentTransfer', 'feComposite', 'feConvolveMatrix', 'feDiffuseLighting', 'feDisplacementMap', 'feDistantLight', 'feFlood', 'feFuncA', 'feFuncB', 'feFuncG', 'feFuncR', 'feGaussianBlur', 'feImage', 'feMerge', 'feMergeNode', 'feMorphology', 'feOffset', 'fePointLight', 'feSpecularLighting', 'feSpotLight', 'feTile', 'feTurbulence']); // List of SVG elements that are disallowed by default.
+// We still need to know them so that we can do namespace
+// checks properly in case one wants to add them to
+// allow-list.
+
+const svgDisallowed = freeze(['animate', 'color-profile', 'cursor', 'discard', 'fedropshadow', 'font-face', 'font-face-format', 'font-face-name', 'font-face-src', 'font-face-uri', 'foreignobject', 'hatch', 'hatchpath', 'mesh', 'meshgradient', 'meshpatch', 'meshrow', 'missing-glyph', 'script', 'set', 'solidcolor', 'unknown', 'use']);
+const mathMl$1 = freeze(['math', 'menclose', 'merror', 'mfenced', 'mfrac', 'mglyph', 'mi', 'mlabeledtr', 'mmultiscripts', 'mn', 'mo', 'mover', 'mpadded', 'mphantom', 'mroot', 'mrow', 'ms', 'mspace', 'msqrt', 'mstyle', 'msub', 'msup', 'msubsup', 'mtable', 'mtd', 'mtext', 'mtr', 'munder', 'munderover', 'mprescripts']); // Similarly to SVG, we want to know all MathML elements,
+// even those that we disallow by default.
+
+const mathMlDisallowed = freeze(['maction', 'maligngroup', 'malignmark', 'mlongdiv', 'mscarries', 'mscarry', 'msgroup', 'mstack', 'msline', 'msrow', 'semantics', 'annotation', 'annotation-xml', 'mprescripts', 'none']);
+const text = freeze(['#text']);
+
+const html = freeze(['accept', 'action', 'align', 'alt', 'autocapitalize', 'autocomplete', 'autopictureinpicture', 'autoplay', 'background', 'bgcolor', 'border', 'capture', 'cellpadding', 'cellspacing', 'checked', 'cite', 'class', 'clear', 'color', 'cols', 'colspan', 'controls', 'controlslist', 'coords', 'crossorigin', 'datetime', 'decoding', 'default', 'dir', 'disabled', 'disablepictureinpicture', 'disableremoteplayback', 'download', 'draggable', 'enctype', 'enterkeyhint', 'face', 'for', 'headers', 'height', 'hidden', 'high', 'href', 'hreflang', 'id', 'inputmode', 'integrity', 'ismap', 'kind', 'label', 'lang', 'list', 'loading', 'loop', 'low', 'max', 'maxlength', 'media', 'method', 'min', 'minlength', 'multiple', 'muted', 'name', 'nonce', 'noshade', 'novalidate', 'nowrap', 'open', 'optimum', 'pattern', 'placeholder', 'playsinline', 'poster', 'preload', 'pubdate', 'radiogroup', 'readonly', 'rel', 'required', 'rev', 'reversed', 'role', 'rows', 'rowspan', 'spellcheck', 'scope', 'selected', 'shape', 'size', 'sizes', 'span', 'srclang', 'start', 'src', 'srcset', 'step', 'style', 'summary', 'tabindex', 'title', 'translate', 'type', 'usemap', 'valign', 'value', 'width', 'xmlns', 'slot']);
+const svg = freeze(['accent-height', 'accumulate', 'additive', 'alignment-baseline', 'ascent', 'attributename', 'attributetype', 'azimuth', 'basefrequency', 'baseline-shift', 'begin', 'bias', 'by', 'class', 'clip', 'clippathunits', 'clip-path', 'clip-rule', 'color', 'color-interpolation', 'color-interpolation-filters', 'color-profile', 'color-rendering', 'cx', 'cy', 'd', 'dx', 'dy', 'diffuseconstant', 'direction', 'display', 'divisor', 'dur', 'edgemode', 'elevation', 'end', 'fill', 'fill-opacity', 'fill-rule', 'filter', 'filterunits', 'flood-color', 'flood-opacity', 'font-family', 'font-size', 'font-size-adjust', 'font-stretch', 'font-style', 'font-variant', 'font-weight', 'fx', 'fy', 'g1', 'g2', 'glyph-name', 'glyphref', 'gradientunits', 'gradienttransform', 'height', 'href', 'id', 'image-rendering', 'in', 'in2', 'k', 'k1', 'k2', 'k3', 'k4', 'kerning', 'keypoints', 'keysplines', 'keytimes', 'lang', 'lengthadjust', 'letter-spacing', 'kernelmatrix', 'kernelunitlength', 'lighting-color', 'local', 'marker-end', 'marker-mid', 'marker-start', 'markerheight', 'markerunits', 'markerwidth', 'maskcontentunits', 'maskunits', 'max', 'mask', 'media', 'method', 'mode', 'min', 'name', 'numoctaves', 'offset', 'operator', 'opacity', 'order', 'orient', 'orientation', 'origin', 'overflow', 'paint-order', 'path', 'pathlength', 'patterncontentunits', 'patterntransform', 'patternunits', 'points', 'preservealpha', 'preserveaspectratio', 'primitiveunits', 'r', 'rx', 'ry', 'radius', 'refx', 'refy', 'repeatcount', 'repeatdur', 'restart', 'result', 'rotate', 'scale', 'seed', 'shape-rendering', 'specularconstant', 'specularexponent', 'spreadmethod', 'startoffset', 'stddeviation', 'stitchtiles', 'stop-color', 'stop-opacity', 'stroke-dasharray', 'stroke-dashoffset', 'stroke-linecap', 'stroke-linejoin', 'stroke-miterlimit', 'stroke-opacity', 'stroke', 'stroke-width', 'style', 'surfacescale', 'systemlanguage', 'tabindex', 'targetx', 'targety', 'transform', 'transform-origin', 'text-anchor', 'text-decoration', 'text-rendering', 'textlength', 'type', 'u1', 'u2', 'unicode', 'values', 'viewbox', 'visibility', 'version', 'vert-adv-y', 'vert-origin-x', 'vert-origin-y', 'width', 'word-spacing', 'wrap', 'writing-mode', 'xchannelselector', 'ychannelselector', 'x', 'x1', 'x2', 'xmlns', 'y', 'y1', 'y2', 'z', 'zoomandpan']);
+const mathMl = freeze(['accent', 'accentunder', 'align', 'bevelled', 'close', 'columnsalign', 'columnlines', 'columnspan', 'denomalign', 'depth', 'dir', 'display', 'displaystyle', 'encoding', 'fence', 'frame', 'height', 'href', 'id', 'largeop', 'length', 'linethickness', 'lspace', 'lquote', 'mathbackground', 'mathcolor', 'mathsize', 'mathvariant', 'maxsize', 'minsize', 'movablelimits', 'notation', 'numalign', 'open', 'rowalign', 'rowlines', 'rowspacing', 'rowspan', 'rspace', 'rquote', 'scriptlevel', 'scriptminsize', 'scriptsizemultiplier', 'selection', 'separator', 'separators', 'stretchy', 'subscriptshift', 'supscriptshift', 'symmetric', 'voffset', 'width', 'xmlns']);
+const xml = freeze(['xlink:href', 'xml:id', 'xlink:title', 'xml:space', 'xmlns:xlink']);
+
+const MUSTACHE_EXPR = seal(/\{\{[\w\W]*|[\w\W]*\}\}/gm); // Specify template detection regex for SAFE_FOR_TEMPLATES mode
+
+const ERB_EXPR = seal(/<%[\w\W]*|[\w\W]*%>/gm);
+const TMPLIT_EXPR = seal(/\${[\w\W]*}/gm);
+const DATA_ATTR = seal(/^data-[\-\w.\u00B7-\uFFFF]/); // eslint-disable-line no-useless-escape
+
+const ARIA_ATTR = seal(/^aria-[\-\w]+$/); // eslint-disable-line no-useless-escape
+
+const IS_ALLOWED_URI = seal(/^(?:(?:(?:f|ht)tps?|mailto|tel|callto|sms|cid|xmpp):|[^a-z]|[a-z+.\-]+(?:[^a-z+.\-:]|$))/i // eslint-disable-line no-useless-escape
+);
+const IS_SCRIPT_OR_DATA = seal(/^(?:\w+script|data):/i);
+const ATTR_WHITESPACE = seal(/[\u0000-\u0020\u00A0\u1680\u180E\u2000-\u2029\u205F\u3000]/g // eslint-disable-line no-control-regex
+);
+const DOCTYPE_NAME = seal(/^html$/i);
+
+var EXPRESSIONS = /*#__PURE__*/Object.freeze({
+  __proto__: null,
+  MUSTACHE_EXPR: MUSTACHE_EXPR,
+  ERB_EXPR: ERB_EXPR,
+  TMPLIT_EXPR: TMPLIT_EXPR,
+  DATA_ATTR: DATA_ATTR,
+  ARIA_ATTR: ARIA_ATTR,
+  IS_ALLOWED_URI: IS_ALLOWED_URI,
+  IS_SCRIPT_OR_DATA: IS_SCRIPT_OR_DATA,
+  ATTR_WHITESPACE: ATTR_WHITESPACE,
+  DOCTYPE_NAME: DOCTYPE_NAME
+});
+
+const getGlobal = () => typeof window === 'undefined' ? null : window;
+/**
+ * Creates a no-op policy for internal use only.
+ * Don't export this function outside this module!
+ * @param {?TrustedTypePolicyFactory} trustedTypes The policy factory.
+ * @param {Document} document The document object (to determine policy name suffix)
+ * @return {?TrustedTypePolicy} The policy created (or null, if Trusted Types
+ * are not supported).
+ */
+
+
+const _createTrustedTypesPolicy = function _createTrustedTypesPolicy(trustedTypes, document) {
+  if (typeof trustedTypes !== 'object' || typeof trustedTypes.createPolicy !== 'function') {
+    return null;
+  } // Allow the callers to control the unique policy name
+  // by adding a data-tt-policy-suffix to the script element with the DOMPurify.
+  // Policy creation with duplicate names throws in Trusted Types.
+
+
+  let suffix = null;
+  const ATTR_NAME = 'data-tt-policy-suffix';
+
+  if (document.currentScript && document.currentScript.hasAttribute(ATTR_NAME)) {
+    suffix = document.currentScript.getAttribute(ATTR_NAME);
+  }
+
+  const policyName = 'dompurify' + (suffix ? '#' + suffix : '');
+
+  try {
+    return trustedTypes.createPolicy(policyName, {
+      createHTML(html) {
+        return html;
+      },
+
+      createScriptURL(scriptUrl) {
+        return scriptUrl;
+      }
+
+    });
+  } catch (_) {
+    // Policy creation failed (most likely another DOMPurify script has
+    // already run). Skip creating the policy, as this will only cause errors
+    // if TT are enforced.
+    console.warn('TrustedTypes policy ' + policyName + ' could not be created.');
+    return null;
+  }
+};
+
+function createDOMPurify() {
+  let window = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : getGlobal();
+
+  const DOMPurify = root => createDOMPurify(root);
+  /**
+   * Version label, exposed for easier checks
+   * if DOMPurify is up to date or not
+   */
+
+
+  DOMPurify.version = '3.0.2';
+  /**
+   * Array of elements that DOMPurify removed during sanitation.
+   * Empty if nothing was removed.
+   */
+
+  DOMPurify.removed = [];
+
+  if (!window || !window.document || window.document.nodeType !== 9) {
+    // Not running in a browser, provide a factory function
+    // so that you can pass your own Window
+    DOMPurify.isSupported = false;
+    return DOMPurify;
+  }
+
+  const originalDocument = window.document;
+  let {
+    document
+  } = window;
+  const {
+    DocumentFragment,
+    HTMLTemplateElement,
+    Node,
+    Element,
+    NodeFilter,
+    NamedNodeMap = window.NamedNodeMap || window.MozNamedAttrMap,
+    HTMLFormElement,
+    DOMParser,
+    trustedTypes
+  } = window;
+  const ElementPrototype = Element.prototype;
+  const cloneNode = lookupGetter(ElementPrototype, 'cloneNode');
+  const getNextSibling = lookupGetter(ElementPrototype, 'nextSibling');
+  const getChildNodes = lookupGetter(ElementPrototype, 'childNodes');
+  const getParentNode = lookupGetter(ElementPrototype, 'parentNode'); // As per issue #47, the web-components registry is inherited by a
+  // new document created via createHTMLDocument. As per the spec
+  // (http://w3c.github.io/webcomponents/spec/custom/#creating-and-passing-registries)
+  // a new empty registry is used when creating a template contents owner
+  // document, so we use that as our parent document to ensure nothing
+  // is inherited.
+
+  if (typeof HTMLTemplateElement === 'function') {
+    const template = document.createElement('template');
+
+    if (template.content && template.content.ownerDocument) {
+      document = template.content.ownerDocument;
+    }
+  }
+
+  const trustedTypesPolicy = _createTrustedTypesPolicy(trustedTypes, originalDocument);
+
+  const emptyHTML = trustedTypesPolicy ? trustedTypesPolicy.createHTML('') : '';
+  const {
+    implementation,
+    createNodeIterator,
+    createDocumentFragment,
+    getElementsByTagName
+  } = document;
+  const {
+    importNode
+  } = originalDocument;
+  let hooks = {};
+  /**
+   * Expose whether this browser supports running the full DOMPurify.
+   */
+
+  DOMPurify.isSupported = typeof entries === 'function' && typeof getParentNode === 'function' && implementation && typeof implementation.createHTMLDocument !== 'undefined';
+  const {
+    MUSTACHE_EXPR,
+    ERB_EXPR,
+    TMPLIT_EXPR,
+    DATA_ATTR,
+    ARIA_ATTR,
+    IS_SCRIPT_OR_DATA,
+    ATTR_WHITESPACE
+  } = EXPRESSIONS;
+  let {
+    IS_ALLOWED_URI: IS_ALLOWED_URI$1
+  } = EXPRESSIONS;
+  /**
+   * We consider the elements and attributes below to be safe. Ideally
+   * don't add any new ones but feel free to remove unwanted ones.
+   */
+
+  /* allowed element names */
+
+  let ALLOWED_TAGS = null;
+  const DEFAULT_ALLOWED_TAGS = addToSet({}, [...html$1, ...svg$1, ...svgFilters, ...mathMl$1, ...text]);
+  /* Allowed attribute names */
+
+  let ALLOWED_ATTR = null;
+  const DEFAULT_ALLOWED_ATTR = addToSet({}, [...html, ...svg, ...mathMl, ...xml]);
+  /*
+   * Configure how DOMPUrify should handle custom elements and their attributes as well as customized built-in elements.
+   * @property {RegExp|Function|null} tagNameCheck one of [null, regexPattern, predicate]. Default: `null` (disallow any custom elements)
+   * @property {RegExp|Function|null} attributeNameCheck one of [null, regexPattern, predicate]. Default: `null` (disallow any attributes not on the allow list)
+   * @property {boolean} allowCustomizedBuiltInElements allow custom elements derived from built-ins if they pass CUSTOM_ELEMENT_HANDLING.tagNameCheck. Default: `false`.
+   */
+
+  let CUSTOM_ELEMENT_HANDLING = Object.seal(Object.create(null, {
+    tagNameCheck: {
+      writable: true,
+      configurable: false,
+      enumerable: true,
+      value: null
+    },
+    attributeNameCheck: {
+      writable: true,
+      configurable: false,
+      enumerable: true,
+      value: null
+    },
+    allowCustomizedBuiltInElements: {
+      writable: true,
+      configurable: false,
+      enumerable: true,
+      value: false
+    }
+  }));
+  /* Explicitly forbidden tags (overrides ALLOWED_TAGS/ADD_TAGS) */
+
+  let FORBID_TAGS = null;
+  /* Explicitly forbidden attributes (overrides ALLOWED_ATTR/ADD_ATTR) */
+
+  let FORBID_ATTR = null;
+  /* Decide if ARIA attributes are okay */
+
+  let ALLOW_ARIA_ATTR = true;
+  /* Decide if custom data attributes are okay */
+
+  let ALLOW_DATA_ATTR = true;
+  /* Decide if unknown protocols are okay */
+
+  let ALLOW_UNKNOWN_PROTOCOLS = false;
+  /* Decide if self-closing tags in attributes are allowed.
+   * Usually removed due to a mXSS issue in jQuery 3.0 */
+
+  let ALLOW_SELF_CLOSE_IN_ATTR = true;
+  /* Output should be safe for common template engines.
+   * This means, DOMPurify removes data attributes, mustaches and ERB
+   */
+
+  let SAFE_FOR_TEMPLATES = false;
+  /* Decide if document with <html>... should be returned */
+
+  let WHOLE_DOCUMENT = false;
+  /* Track whether config is already set on this instance of DOMPurify. */
+
+  let SET_CONFIG = false;
+  /* Decide if all elements (e.g. style, script) must be children of
+   * document.body. By default, browsers might move them to document.head */
+
+  let FORCE_BODY = false;
+  /* Decide if a DOM `HTMLBodyElement` should be returned, instead of a html
+   * string (or a TrustedHTML object if Trusted Types are supported).
+   * If `WHOLE_DOCUMENT` is enabled a `HTMLHtmlElement` will be returned instead
+   */
+
+  let RETURN_DOM = false;
+  /* Decide if a DOM `DocumentFragment` should be returned, instead of a html
+   * string  (or a TrustedHTML object if Trusted Types are supported) */
+
+  let RETURN_DOM_FRAGMENT = false;
+  /* Try to return a Trusted Type object instead of a string, return a string in
+   * case Trusted Types are not supported  */
+
+  let RETURN_TRUSTED_TYPE = false;
+  /* Output should be free from DOM clobbering attacks?
+   * This sanitizes markups named with colliding, clobberable built-in DOM APIs.
+   */
+
+  let SANITIZE_DOM = true;
+  /* Achieve full DOM Clobbering protection by isolating the namespace of named
+   * properties and JS variables, mitigating attacks that abuse the HTML/DOM spec rules.
+   *
+   * HTML/DOM spec rules that enable DOM Clobbering:
+   *   - Named Access on Window (§7.3.3)
+   *   - DOM Tree Accessors (§3.1.5)
+   *   - Form Element Parent-Child Relations (§4.10.3)
+   *   - Iframe srcdoc / Nested WindowProxies (§4.8.5)
+   *   - HTMLCollection (§4.2.10.2)
+   *
+   * Namespace isolation is implemented by prefixing `id` and `name` attributes
+   * with a constant string, i.e., `user-content-`
+   */
+
+  let SANITIZE_NAMED_PROPS = false;
+  const SANITIZE_NAMED_PROPS_PREFIX = 'user-content-';
+  /* Keep element content when removing element? */
+
+  let KEEP_CONTENT = true;
+  /* If a `Node` is passed to sanitize(), then performs sanitization in-place instead
+   * of importing it into a new Document and returning a sanitized copy */
+
+  let IN_PLACE = false;
+  /* Allow usage of profiles like html, svg and mathMl */
+
+  let USE_PROFILES = {};
+  /* Tags to ignore content of when KEEP_CONTENT is true */
+
+  let FORBID_CONTENTS = null;
+  const DEFAULT_FORBID_CONTENTS = addToSet({}, ['annotation-xml', 'audio', 'colgroup', 'desc', 'foreignobject', 'head', 'iframe', 'math', 'mi', 'mn', 'mo', 'ms', 'mtext', 'noembed', 'noframes', 'noscript', 'plaintext', 'script', 'style', 'svg', 'template', 'thead', 'title', 'video', 'xmp']);
+  /* Tags that are safe for data: URIs */
+
+  let DATA_URI_TAGS = null;
+  const DEFAULT_DATA_URI_TAGS = addToSet({}, ['audio', 'video', 'img', 'source', 'image', 'track']);
+  /* Attributes safe for values like "javascript:" */
+
+  let URI_SAFE_ATTRIBUTES = null;
+  const DEFAULT_URI_SAFE_ATTRIBUTES = addToSet({}, ['alt', 'class', 'for', 'id', 'label', 'name', 'pattern', 'placeholder', 'role', 'summary', 'title', 'value', 'style', 'xmlns']);
+  const MATHML_NAMESPACE = 'http://www.w3.org/1998/Math/MathML';
+  const SVG_NAMESPACE = 'http://www.w3.org/2000/svg';
+  const HTML_NAMESPACE = 'http://www.w3.org/1999/xhtml';
+  /* Document namespace */
+
+  let NAMESPACE = HTML_NAMESPACE;
+  let IS_EMPTY_INPUT = false;
+  /* Allowed XHTML+XML namespaces */
+
+  let ALLOWED_NAMESPACES = null;
+  const DEFAULT_ALLOWED_NAMESPACES = addToSet({}, [MATHML_NAMESPACE, SVG_NAMESPACE, HTML_NAMESPACE], stringToString);
+  /* Parsing of strict XHTML documents */
+
+  let PARSER_MEDIA_TYPE;
+  const SUPPORTED_PARSER_MEDIA_TYPES = ['application/xhtml+xml', 'text/html'];
+  const DEFAULT_PARSER_MEDIA_TYPE = 'text/html';
+  let transformCaseFunc;
+  /* Keep a reference to config to pass to hooks */
+
+  let CONFIG = null;
+  /* Ideally, do not touch anything below this line */
+
+  /* ______________________________________________ */
+
+  const formElement = document.createElement('form');
+
+  const isRegexOrFunction = function isRegexOrFunction(testValue) {
+    return testValue instanceof RegExp || testValue instanceof Function;
+  };
+  /**
+   * _parseConfig
+   *
+   * @param  {Object} cfg optional config literal
+   */
+  // eslint-disable-next-line complexity
+
+
+  const _parseConfig = function _parseConfig(cfg) {
+    if (CONFIG && CONFIG === cfg) {
+      return;
+    }
+    /* Shield configuration object from tampering */
+
+
+    if (!cfg || typeof cfg !== 'object') {
+      cfg = {};
+    }
+    /* Shield configuration object from prototype pollution */
+
+
+    cfg = clone(cfg);
+    PARSER_MEDIA_TYPE = // eslint-disable-next-line unicorn/prefer-includes
+    SUPPORTED_PARSER_MEDIA_TYPES.indexOf(cfg.PARSER_MEDIA_TYPE) === -1 ? PARSER_MEDIA_TYPE = DEFAULT_PARSER_MEDIA_TYPE : PARSER_MEDIA_TYPE = cfg.PARSER_MEDIA_TYPE; // HTML tags and attributes are not case-sensitive, converting to lowercase. Keeping XHTML as is.
+
+    transformCaseFunc = PARSER_MEDIA_TYPE === 'application/xhtml+xml' ? stringToString : stringToLowerCase;
+    /* Set configuration parameters */
+
+    ALLOWED_TAGS = 'ALLOWED_TAGS' in cfg ? addToSet({}, cfg.ALLOWED_TAGS, transformCaseFunc) : DEFAULT_ALLOWED_TAGS;
+    ALLOWED_ATTR = 'ALLOWED_ATTR' in cfg ? addToSet({}, cfg.ALLOWED_ATTR, transformCaseFunc) : DEFAULT_ALLOWED_ATTR;
+    ALLOWED_NAMESPACES = 'ALLOWED_NAMESPACES' in cfg ? addToSet({}, cfg.ALLOWED_NAMESPACES, stringToString) : DEFAULT_ALLOWED_NAMESPACES;
+    URI_SAFE_ATTRIBUTES = 'ADD_URI_SAFE_ATTR' in cfg ? addToSet(clone(DEFAULT_URI_SAFE_ATTRIBUTES), // eslint-disable-line indent
+    cfg.ADD_URI_SAFE_ATTR, // eslint-disable-line indent
+    transformCaseFunc // eslint-disable-line indent
+    ) // eslint-disable-line indent
+    : DEFAULT_URI_SAFE_ATTRIBUTES;
+    DATA_URI_TAGS = 'ADD_DATA_URI_TAGS' in cfg ? addToSet(clone(DEFAULT_DATA_URI_TAGS), // eslint-disable-line indent
+    cfg.ADD_DATA_URI_TAGS, // eslint-disable-line indent
+    transformCaseFunc // eslint-disable-line indent
+    ) // eslint-disable-line indent
+    : DEFAULT_DATA_URI_TAGS;
+    FORBID_CONTENTS = 'FORBID_CONTENTS' in cfg ? addToSet({}, cfg.FORBID_CONTENTS, transformCaseFunc) : DEFAULT_FORBID_CONTENTS;
+    FORBID_TAGS = 'FORBID_TAGS' in cfg ? addToSet({}, cfg.FORBID_TAGS, transformCaseFunc) : {};
+    FORBID_ATTR = 'FORBID_ATTR' in cfg ? addToSet({}, cfg.FORBID_ATTR, transformCaseFunc) : {};
+    USE_PROFILES = 'USE_PROFILES' in cfg ? cfg.USE_PROFILES : false;
+    ALLOW_ARIA_ATTR = cfg.ALLOW_ARIA_ATTR !== false; // Default true
+
+    ALLOW_DATA_ATTR = cfg.ALLOW_DATA_ATTR !== false; // Default true
+
+    ALLOW_UNKNOWN_PROTOCOLS = cfg.ALLOW_UNKNOWN_PROTOCOLS || false; // Default false
+
+    ALLOW_SELF_CLOSE_IN_ATTR = cfg.ALLOW_SELF_CLOSE_IN_ATTR !== false; // Default true
+
+    SAFE_FOR_TEMPLATES = cfg.SAFE_FOR_TEMPLATES || false; // Default false
+
+    WHOLE_DOCUMENT = cfg.WHOLE_DOCUMENT || false; // Default false
+
+    RETURN_DOM = cfg.RETURN_DOM || false; // Default false
+
+    RETURN_DOM_FRAGMENT = cfg.RETURN_DOM_FRAGMENT || false; // Default false
+
+    RETURN_TRUSTED_TYPE = cfg.RETURN_TRUSTED_TYPE || false; // Default false
+
+    FORCE_BODY = cfg.FORCE_BODY || false; // Default false
+
+    SANITIZE_DOM = cfg.SANITIZE_DOM !== false; // Default true
+
+    SANITIZE_NAMED_PROPS = cfg.SANITIZE_NAMED_PROPS || false; // Default false
+
+    KEEP_CONTENT = cfg.KEEP_CONTENT !== false; // Default true
+
+    IN_PLACE = cfg.IN_PLACE || false; // Default false
+
+    IS_ALLOWED_URI$1 = cfg.ALLOWED_URI_REGEXP || IS_ALLOWED_URI;
+    NAMESPACE = cfg.NAMESPACE || HTML_NAMESPACE;
+    CUSTOM_ELEMENT_HANDLING = cfg.CUSTOM_ELEMENT_HANDLING || {};
+
+    if (cfg.CUSTOM_ELEMENT_HANDLING && isRegexOrFunction(cfg.CUSTOM_ELEMENT_HANDLING.tagNameCheck)) {
+      CUSTOM_ELEMENT_HANDLING.tagNameCheck = cfg.CUSTOM_ELEMENT_HANDLING.tagNameCheck;
+    }
+
+    if (cfg.CUSTOM_ELEMENT_HANDLING && isRegexOrFunction(cfg.CUSTOM_ELEMENT_HANDLING.attributeNameCheck)) {
+      CUSTOM_ELEMENT_HANDLING.attributeNameCheck = cfg.CUSTOM_ELEMENT_HANDLING.attributeNameCheck;
+    }
+
+    if (cfg.CUSTOM_ELEMENT_HANDLING && typeof cfg.CUSTOM_ELEMENT_HANDLING.allowCustomizedBuiltInElements === 'boolean') {
+      CUSTOM_ELEMENT_HANDLING.allowCustomizedBuiltInElements = cfg.CUSTOM_ELEMENT_HANDLING.allowCustomizedBuiltInElements;
+    }
+
+    if (SAFE_FOR_TEMPLATES) {
+      ALLOW_DATA_ATTR = false;
+    }
+
+    if (RETURN_DOM_FRAGMENT) {
+      RETURN_DOM = true;
+    }
+    /* Parse profile info */
+
+
+    if (USE_PROFILES) {
+      ALLOWED_TAGS = addToSet({}, [...text]);
+      ALLOWED_ATTR = [];
+
+      if (USE_PROFILES.html === true) {
+        addToSet(ALLOWED_TAGS, html$1);
+        addToSet(ALLOWED_ATTR, html);
+      }
+
+      if (USE_PROFILES.svg === true) {
+        addToSet(ALLOWED_TAGS, svg$1);
+        addToSet(ALLOWED_ATTR, svg);
+        addToSet(ALLOWED_ATTR, xml);
+      }
+
+      if (USE_PROFILES.svgFilters === true) {
+        addToSet(ALLOWED_TAGS, svgFilters);
+        addToSet(ALLOWED_ATTR, svg);
+        addToSet(ALLOWED_ATTR, xml);
+      }
+
+      if (USE_PROFILES.mathMl === true) {
+        addToSet(ALLOWED_TAGS, mathMl$1);
+        addToSet(ALLOWED_ATTR, mathMl);
+        addToSet(ALLOWED_ATTR, xml);
+      }
+    }
+    /* Merge configuration parameters */
+
+
+    if (cfg.ADD_TAGS) {
+      if (ALLOWED_TAGS === DEFAULT_ALLOWED_TAGS) {
+        ALLOWED_TAGS = clone(ALLOWED_TAGS);
+      }
+
+      addToSet(ALLOWED_TAGS, cfg.ADD_TAGS, transformCaseFunc);
+    }
+
+    if (cfg.ADD_ATTR) {
+      if (ALLOWED_ATTR === DEFAULT_ALLOWED_ATTR) {
+        ALLOWED_ATTR = clone(ALLOWED_ATTR);
+      }
+
+      addToSet(ALLOWED_ATTR, cfg.ADD_ATTR, transformCaseFunc);
+    }
+
+    if (cfg.ADD_URI_SAFE_ATTR) {
+      addToSet(URI_SAFE_ATTRIBUTES, cfg.ADD_URI_SAFE_ATTR, transformCaseFunc);
+    }
+
+    if (cfg.FORBID_CONTENTS) {
+      if (FORBID_CONTENTS === DEFAULT_FORBID_CONTENTS) {
+        FORBID_CONTENTS = clone(FORBID_CONTENTS);
+      }
+
+      addToSet(FORBID_CONTENTS, cfg.FORBID_CONTENTS, transformCaseFunc);
+    }
+    /* Add #text in case KEEP_CONTENT is set to true */
+
+
+    if (KEEP_CONTENT) {
+      ALLOWED_TAGS['#text'] = true;
+    }
+    /* Add html, head and body to ALLOWED_TAGS in case WHOLE_DOCUMENT is true */
+
+
+    if (WHOLE_DOCUMENT) {
+      addToSet(ALLOWED_TAGS, ['html', 'head', 'body']);
+    }
+    /* Add tbody to ALLOWED_TAGS in case tables are permitted, see #286, #365 */
+
+
+    if (ALLOWED_TAGS.table) {
+      addToSet(ALLOWED_TAGS, ['tbody']);
+      delete FORBID_TAGS.tbody;
+    } // Prevent further manipulation of configuration.
+    // Not available in IE8, Safari 5, etc.
+
+
+    if (freeze) {
+      freeze(cfg);
+    }
+
+    CONFIG = cfg;
+  };
+
+  const MATHML_TEXT_INTEGRATION_POINTS = addToSet({}, ['mi', 'mo', 'mn', 'ms', 'mtext']);
+  const HTML_INTEGRATION_POINTS = addToSet({}, ['foreignobject', 'desc', 'title', 'annotation-xml']); // Certain elements are allowed in both SVG and HTML
+  // namespace. We need to specify them explicitly
+  // so that they don't get erroneously deleted from
+  // HTML namespace.
+
+  const COMMON_SVG_AND_HTML_ELEMENTS = addToSet({}, ['title', 'style', 'font', 'a', 'script']);
+  /* Keep track of all possible SVG and MathML tags
+   * so that we can perform the namespace checks
+   * correctly. */
+
+  const ALL_SVG_TAGS = addToSet({}, svg$1);
+  addToSet(ALL_SVG_TAGS, svgFilters);
+  addToSet(ALL_SVG_TAGS, svgDisallowed);
+  const ALL_MATHML_TAGS = addToSet({}, mathMl$1);
+  addToSet(ALL_MATHML_TAGS, mathMlDisallowed);
+  /**
+   *
+   *
+   * @param  {Element} element a DOM element whose namespace is being checked
+   * @returns {boolean} Return false if the element has a
+   *  namespace that a spec-compliant parser would never
+   *  return. Return true otherwise.
+   */
+
+  const _checkValidNamespace = function _checkValidNamespace(element) {
+    let parent = getParentNode(element); // In JSDOM, if we're inside shadow DOM, then parentNode
+    // can be null. We just simulate parent in this case.
+
+    if (!parent || !parent.tagName) {
+      parent = {
+        namespaceURI: NAMESPACE,
+        tagName: 'template'
+      };
+    }
+
+    const tagName = stringToLowerCase(element.tagName);
+    const parentTagName = stringToLowerCase(parent.tagName);
+
+    if (!ALLOWED_NAMESPACES[element.namespaceURI]) {
+      return false;
+    }
+
+    if (element.namespaceURI === SVG_NAMESPACE) {
+      // The only way to switch from HTML namespace to SVG
+      // is via <svg>. If it happens via any other tag, then
+      // it should be killed.
+      if (parent.namespaceURI === HTML_NAMESPACE) {
+        return tagName === 'svg';
+      } // The only way to switch from MathML to SVG is via`
+      // svg if parent is either <annotation-xml> or MathML
+      // text integration points.
+
+
+      if (parent.namespaceURI === MATHML_NAMESPACE) {
+        return tagName === 'svg' && (parentTagName === 'annotation-xml' || MATHML_TEXT_INTEGRATION_POINTS[parentTagName]);
+      } // We only allow elements that are defined in SVG
+      // spec. All others are disallowed in SVG namespace.
+
+
+      return Boolean(ALL_SVG_TAGS[tagName]);
+    }
+
+    if (element.namespaceURI === MATHML_NAMESPACE) {
+      // The only way to switch from HTML namespace to MathML
+      // is via <math>. If it happens via any other tag, then
+      // it should be killed.
+      if (parent.namespaceURI === HTML_NAMESPACE) {
+        return tagName === 'math';
+      } // The only way to switch from SVG to MathML is via
+      // <math> and HTML integration points
+
+
+      if (parent.namespaceURI === SVG_NAMESPACE) {
+        return tagName === 'math' && HTML_INTEGRATION_POINTS[parentTagName];
+      } // We only allow elements that are defined in MathML
+      // spec. All others are disallowed in MathML namespace.
+
+
+      return Boolean(ALL_MATHML_TAGS[tagName]);
+    }
+
+    if (element.namespaceURI === HTML_NAMESPACE) {
+      // The only way to switch from SVG to HTML is via
+      // HTML integration points, and from MathML to HTML
+      // is via MathML text integration points
+      if (parent.namespaceURI === SVG_NAMESPACE && !HTML_INTEGRATION_POINTS[parentTagName]) {
+        return false;
+      }
+
+      if (parent.namespaceURI === MATHML_NAMESPACE && !MATHML_TEXT_INTEGRATION_POINTS[parentTagName]) {
+        return false;
+      } // We disallow tags that are specific for MathML
+      // or SVG and should never appear in HTML namespace
+
+
+      return !ALL_MATHML_TAGS[tagName] && (COMMON_SVG_AND_HTML_ELEMENTS[tagName] || !ALL_SVG_TAGS[tagName]);
+    } // For XHTML and XML documents that support custom namespaces
+
+
+    if (PARSER_MEDIA_TYPE === 'application/xhtml+xml' && ALLOWED_NAMESPACES[element.namespaceURI]) {
+      return true;
+    } // The code should never reach this place (this means
+    // that the element somehow got namespace that is not
+    // HTML, SVG, MathML or allowed via ALLOWED_NAMESPACES).
+    // Return false just in case.
+
+
+    return false;
+  };
+  /**
+   * _forceRemove
+   *
+   * @param  {Node} node a DOM node
+   */
+
+
+  const _forceRemove = function _forceRemove(node) {
+    arrayPush(DOMPurify.removed, {
+      element: node
+    });
+
+    try {
+      // eslint-disable-next-line unicorn/prefer-dom-node-remove
+      node.parentNode.removeChild(node);
+    } catch (_) {
+      node.remove();
+    }
+  };
+  /**
+   * _removeAttribute
+   *
+   * @param  {String} name an Attribute name
+   * @param  {Node} node a DOM node
+   */
+
+
+  const _removeAttribute = function _removeAttribute(name, node) {
+    try {
+      arrayPush(DOMPurify.removed, {
+        attribute: node.getAttributeNode(name),
+        from: node
+      });
+    } catch (_) {
+      arrayPush(DOMPurify.removed, {
+        attribute: null,
+        from: node
+      });
+    }
+
+    node.removeAttribute(name); // We void attribute values for unremovable "is"" attributes
+
+    if (name === 'is' && !ALLOWED_ATTR[name]) {
+      if (RETURN_DOM || RETURN_DOM_FRAGMENT) {
+        try {
+          _forceRemove(node);
+        } catch (_) {}
+      } else {
+        try {
+          node.setAttribute(name, '');
+        } catch (_) {}
+      }
+    }
+  };
+  /**
+   * _initDocument
+   *
+   * @param  {String} dirty a string of dirty markup
+   * @return {Document} a DOM, filled with the dirty markup
+   */
+
+
+  const _initDocument = function _initDocument(dirty) {
+    /* Create a HTML document */
+    let doc;
+    let leadingWhitespace;
+
+    if (FORCE_BODY) {
+      dirty = '<remove></remove>' + dirty;
+    } else {
+      /* If FORCE_BODY isn't used, leading whitespace needs to be preserved manually */
+      const matches = stringMatch(dirty, /^[\r\n\t ]+/);
+      leadingWhitespace = matches && matches[0];
+    }
+
+    if (PARSER_MEDIA_TYPE === 'application/xhtml+xml' && NAMESPACE === HTML_NAMESPACE) {
+      // Root of XHTML doc must contain xmlns declaration (see https://www.w3.org/TR/xhtml1/normative.html#strict)
+      dirty = '<html xmlns="http://www.w3.org/1999/xhtml"><head></head><body>' + dirty + '</body></html>';
+    }
+
+    const dirtyPayload = trustedTypesPolicy ? trustedTypesPolicy.createHTML(dirty) : dirty;
+    /*
+     * Use the DOMParser API by default, fallback later if needs be
+     * DOMParser not work for svg when has multiple root element.
+     */
+
+    if (NAMESPACE === HTML_NAMESPACE) {
+      try {
+        doc = new DOMParser().parseFromString(dirtyPayload, PARSER_MEDIA_TYPE);
+      } catch (_) {}
+    }
+    /* Use createHTMLDocument in case DOMParser is not available */
+
+
+    if (!doc || !doc.documentElement) {
+      doc = implementation.createDocument(NAMESPACE, 'template', null);
+
+      try {
+        doc.documentElement.innerHTML = IS_EMPTY_INPUT ? emptyHTML : dirtyPayload;
+      } catch (_) {// Syntax error if dirtyPayload is invalid xml
+      }
+    }
+
+    const body = doc.body || doc.documentElement;
+
+    if (dirty && leadingWhitespace) {
+      body.insertBefore(document.createTextNode(leadingWhitespace), body.childNodes[0] || null);
+    }
+    /* Work on whole document or just its body */
+
+
+    if (NAMESPACE === HTML_NAMESPACE) {
+      return getElementsByTagName.call(doc, WHOLE_DOCUMENT ? 'html' : 'body')[0];
+    }
+
+    return WHOLE_DOCUMENT ? doc.documentElement : body;
+  };
+  /**
+   * _createIterator
+   *
+   * @param  {Document} root document/fragment to create iterator for
+   * @return {Iterator} iterator instance
+   */
+
+
+  const _createIterator = function _createIterator(root) {
+    return createNodeIterator.call(root.ownerDocument || root, root, // eslint-disable-next-line no-bitwise
+    NodeFilter.SHOW_ELEMENT | NodeFilter.SHOW_COMMENT | NodeFilter.SHOW_TEXT, null, false);
+  };
+  /**
+   * _isClobbered
+   *
+   * @param  {Node} elm element to check for clobbering attacks
+   * @return {Boolean} true if clobbered, false if safe
+   */
+
+
+  const _isClobbered = function _isClobbered(elm) {
+    return elm instanceof HTMLFormElement && (typeof elm.nodeName !== 'string' || typeof elm.textContent !== 'string' || typeof elm.removeChild !== 'function' || !(elm.attributes instanceof NamedNodeMap) || typeof elm.removeAttribute !== 'function' || typeof elm.setAttribute !== 'function' || typeof elm.namespaceURI !== 'string' || typeof elm.insertBefore !== 'function' || typeof elm.hasChildNodes !== 'function');
+  };
+  /**
+   * _isNode
+   *
+   * @param  {Node} obj object to check whether it's a DOM node
+   * @return {Boolean} true is object is a DOM node
+   */
+
+
+  const _isNode = function _isNode(object) {
+    return typeof Node === 'object' ? object instanceof Node : object && typeof object === 'object' && typeof object.nodeType === 'number' && typeof object.nodeName === 'string';
+  };
+  /**
+   * _executeHook
+   * Execute user configurable hooks
+   *
+   * @param  {String} entryPoint  Name of the hook's entry point
+   * @param  {Node} currentNode node to work on with the hook
+   * @param  {Object} data additional hook parameters
+   */
+
+
+  const _executeHook = function _executeHook(entryPoint, currentNode, data) {
+    if (!hooks[entryPoint]) {
+      return;
+    }
+
+    arrayForEach(hooks[entryPoint], hook => {
+      hook.call(DOMPurify, currentNode, data, CONFIG);
+    });
+  };
+  /**
+   * _sanitizeElements
+   *
+   * @protect nodeName
+   * @protect textContent
+   * @protect removeChild
+   *
+   * @param   {Node} currentNode to check for permission to exist
+   * @return  {Boolean} true if node was killed, false if left alive
+   */
+
+
+  const _sanitizeElements = function _sanitizeElements(currentNode) {
+    let content;
+    /* Execute a hook if present */
+
+    _executeHook('beforeSanitizeElements', currentNode, null);
+    /* Check if element is clobbered or can clobber */
+
+
+    if (_isClobbered(currentNode)) {
+      _forceRemove(currentNode);
+
+      return true;
+    }
+    /* Now let's check the element's type and name */
+
+
+    const tagName = transformCaseFunc(currentNode.nodeName);
+    /* Execute a hook if present */
+
+    _executeHook('uponSanitizeElement', currentNode, {
+      tagName,
+      allowedTags: ALLOWED_TAGS
+    });
+    /* Detect mXSS attempts abusing namespace confusion */
+
+
+    if (currentNode.hasChildNodes() && !_isNode(currentNode.firstElementChild) && (!_isNode(currentNode.content) || !_isNode(currentNode.content.firstElementChild)) && regExpTest(/<[/\w]/g, currentNode.innerHTML) && regExpTest(/<[/\w]/g, currentNode.textContent)) {
+      _forceRemove(currentNode);
+
+      return true;
+    }
+    /* Remove element if anything forbids its presence */
+
+
+    if (!ALLOWED_TAGS[tagName] || FORBID_TAGS[tagName]) {
+      /* Check if we have a custom element to handle */
+      if (!FORBID_TAGS[tagName] && _basicCustomElementTest(tagName)) {
+        if (CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof RegExp && regExpTest(CUSTOM_ELEMENT_HANDLING.tagNameCheck, tagName)) return false;
+        if (CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof Function && CUSTOM_ELEMENT_HANDLING.tagNameCheck(tagName)) return false;
+      }
+      /* Keep content except for bad-listed elements */
+
+
+      if (KEEP_CONTENT && !FORBID_CONTENTS[tagName]) {
+        const parentNode = getParentNode(currentNode) || currentNode.parentNode;
+        const childNodes = getChildNodes(currentNode) || currentNode.childNodes;
+
+        if (childNodes && parentNode) {
+          const childCount = childNodes.length;
+
+          for (let i = childCount - 1; i >= 0; --i) {
+            parentNode.insertBefore(cloneNode(childNodes[i], true), getNextSibling(currentNode));
+          }
+        }
+      }
+
+      _forceRemove(currentNode);
+
+      return true;
+    }
+    /* Check whether element has a valid namespace */
+
+
+    if (currentNode instanceof Element && !_checkValidNamespace(currentNode)) {
+      _forceRemove(currentNode);
+
+      return true;
+    }
+    /* Make sure that older browsers don't get noscript mXSS */
+
+
+    if ((tagName === 'noscript' || tagName === 'noembed') && regExpTest(/<\/no(script|embed)/i, currentNode.innerHTML)) {
+      _forceRemove(currentNode);
+
+      return true;
+    }
+    /* Sanitize element content to be template-safe */
+
+
+    if (SAFE_FOR_TEMPLATES && currentNode.nodeType === 3) {
+      /* Get the element's text content */
+      content = currentNode.textContent;
+      content = stringReplace(content, MUSTACHE_EXPR, ' ');
+      content = stringReplace(content, ERB_EXPR, ' ');
+      content = stringReplace(content, TMPLIT_EXPR, ' ');
+
+      if (currentNode.textContent !== content) {
+        arrayPush(DOMPurify.removed, {
+          element: currentNode.cloneNode()
+        });
+        currentNode.textContent = content;
+      }
+    }
+    /* Execute a hook if present */
+
+
+    _executeHook('afterSanitizeElements', currentNode, null);
+
+    return false;
+  };
+  /**
+   * _isValidAttribute
+   *
+   * @param  {string} lcTag Lowercase tag name of containing element.
+   * @param  {string} lcName Lowercase attribute name.
+   * @param  {string} value Attribute value.
+   * @return {Boolean} Returns true if `value` is valid, otherwise false.
+   */
+  // eslint-disable-next-line complexity
+
+
+  const _isValidAttribute = function _isValidAttribute(lcTag, lcName, value) {
+    /* Make sure attribute cannot clobber */
+    if (SANITIZE_DOM && (lcName === 'id' || lcName === 'name') && (value in document || value in formElement)) {
+      return false;
+    }
+    /* Allow valid data-* attributes: At least one character after "-"
+        (https://html.spec.whatwg.org/multipage/dom.html#embedding-custom-non-visible-data-with-the-data-*-attributes)
+        XML-compatible (https://html.spec.whatwg.org/multipage/infrastructure.html#xml-compatible and http://www.w3.org/TR/xml/#d0e804)
+        We don't need to check the value; it's always URI safe. */
+
+
+    if (ALLOW_DATA_ATTR && !FORBID_ATTR[lcName] && regExpTest(DATA_ATTR, lcName)) ; else if (ALLOW_ARIA_ATTR && regExpTest(ARIA_ATTR, lcName)) ; else if (!ALLOWED_ATTR[lcName] || FORBID_ATTR[lcName]) {
+      if ( // First condition does a very basic check if a) it's basically a valid custom element tagname AND
+      // b) if the tagName passes whatever the user has configured for CUSTOM_ELEMENT_HANDLING.tagNameCheck
+      // and c) if the attribute name passes whatever the user has configured for CUSTOM_ELEMENT_HANDLING.attributeNameCheck
+      _basicCustomElementTest(lcTag) && (CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof RegExp && regExpTest(CUSTOM_ELEMENT_HANDLING.tagNameCheck, lcTag) || CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof Function && CUSTOM_ELEMENT_HANDLING.tagNameCheck(lcTag)) && (CUSTOM_ELEMENT_HANDLING.attributeNameCheck instanceof RegExp && regExpTest(CUSTOM_ELEMENT_HANDLING.attributeNameCheck, lcName) || CUSTOM_ELEMENT_HANDLING.attributeNameCheck instanceof Function && CUSTOM_ELEMENT_HANDLING.attributeNameCheck(lcName)) || // Alternative, second condition checks if it's an `is`-attribute, AND
+      // the value passes whatever the user has configured for CUSTOM_ELEMENT_HANDLING.tagNameCheck
+      lcName === 'is' && CUSTOM_ELEMENT_HANDLING.allowCustomizedBuiltInElements && (CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof RegExp && regExpTest(CUSTOM_ELEMENT_HANDLING.tagNameCheck, value) || CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof Function && CUSTOM_ELEMENT_HANDLING.tagNameCheck(value))) ; else {
+        return false;
+      }
+      /* Check value is safe. First, is attr inert? If so, is safe */
+
+    } else if (URI_SAFE_ATTRIBUTES[lcName]) ; else if (regExpTest(IS_ALLOWED_URI$1, stringReplace(value, ATTR_WHITESPACE, ''))) ; else if ((lcName === 'src' || lcName === 'xlink:href' || lcName === 'href') && lcTag !== 'script' && stringIndexOf(value, 'data:') === 0 && DATA_URI_TAGS[lcTag]) ; else if (ALLOW_UNKNOWN_PROTOCOLS && !regExpTest(IS_SCRIPT_OR_DATA, stringReplace(value, ATTR_WHITESPACE, ''))) ; else if (!value) ; else {
+      return false;
+    }
+
+    return true;
+  };
+  /**
+   * _basicCustomElementCheck
+   * checks if at least one dash is included in tagName, and it's not the first char
+   * for more sophisticated checking see https://github.com/sindresorhus/validate-element-name
+   * @param {string} tagName name of the tag of the node to sanitize
+   */
+
+
+  const _basicCustomElementTest = function _basicCustomElementTest(tagName) {
+    return tagName.indexOf('-') > 0;
+  };
+  /**
+   * _sanitizeAttributes
+   *
+   * @protect attributes
+   * @protect nodeName
+   * @protect removeAttribute
+   * @protect setAttribute
+   *
+   * @param  {Node} currentNode to sanitize
+   */
+
+
+  const _sanitizeAttributes = function _sanitizeAttributes(currentNode) {
+    let attr;
+    let value;
+    let lcName;
+    let l;
+    /* Execute a hook if present */
+
+    _executeHook('beforeSanitizeAttributes', currentNode, null);
+
+    const {
+      attributes
+    } = currentNode;
+    /* Check if we have attributes; if not we might have a text node */
+
+    if (!attributes) {
+      return;
+    }
+
+    const hookEvent = {
+      attrName: '',
+      attrValue: '',
+      keepAttr: true,
+      allowedAttributes: ALLOWED_ATTR
+    };
+    l = attributes.length;
+    /* Go backwards over all attributes; safely remove bad ones */
+
+    while (l--) {
+      attr = attributes[l];
+      const {
+        name,
+        namespaceURI
+      } = attr;
+      value = name === 'value' ? attr.value : stringTrim(attr.value);
+      lcName = transformCaseFunc(name);
+      /* Execute a hook if present */
+
+      hookEvent.attrName = lcName;
+      hookEvent.attrValue = value;
+      hookEvent.keepAttr = true;
+      hookEvent.forceKeepAttr = undefined; // Allows developers to see this is a property they can set
+
+      _executeHook('uponSanitizeAttribute', currentNode, hookEvent);
+
+      value = hookEvent.attrValue;
+      /* Did the hooks approve of the attribute? */
+
+      if (hookEvent.forceKeepAttr) {
+        continue;
+      }
+      /* Remove attribute */
+
+
+      _removeAttribute(name, currentNode);
+      /* Did the hooks approve of the attribute? */
+
+
+      if (!hookEvent.keepAttr) {
+        continue;
+      }
+      /* Work around a security issue in jQuery 3.0 */
+
+
+      if (!ALLOW_SELF_CLOSE_IN_ATTR && regExpTest(/\/>/i, value)) {
+        _removeAttribute(name, currentNode);
+
+        continue;
+      }
+      /* Sanitize attribute content to be template-safe */
+
+
+      if (SAFE_FOR_TEMPLATES) {
+        value = stringReplace(value, MUSTACHE_EXPR, ' ');
+        value = stringReplace(value, ERB_EXPR, ' ');
+        value = stringReplace(value, TMPLIT_EXPR, ' ');
+      }
+      /* Is `value` valid for this attribute? */
+
+
+      const lcTag = transformCaseFunc(currentNode.nodeName);
+
+      if (!_isValidAttribute(lcTag, lcName, value)) {
+        continue;
+      }
+      /* Full DOM Clobbering protection via namespace isolation,
+       * Prefix id and name attributes with `user-content-`
+       */
+
+
+      if (SANITIZE_NAMED_PROPS && (lcName === 'id' || lcName === 'name')) {
+        // Remove the attribute with this value
+        _removeAttribute(name, currentNode); // Prefix the value and later re-create the attribute with the sanitized value
+
+
+        value = SANITIZE_NAMED_PROPS_PREFIX + value;
+      }
+      /* Handle attributes that require Trusted Types */
+
+
+      if (trustedTypesPolicy && typeof trustedTypes === 'object' && typeof trustedTypes.getAttributeType === 'function') {
+        if (namespaceURI) ; else {
+          switch (trustedTypes.getAttributeType(lcTag, lcName)) {
+            case 'TrustedHTML':
+              value = trustedTypesPolicy.createHTML(value);
+              break;
+
+            case 'TrustedScriptURL':
+              value = trustedTypesPolicy.createScriptURL(value);
+              break;
+          }
+        }
+      }
+      /* Handle invalid data-* attribute set by try-catching it */
+
+
+      try {
+        if (namespaceURI) {
+          currentNode.setAttributeNS(namespaceURI, name, value);
+        } else {
+          /* Fallback to setAttribute() for browser-unrecognized namespaces e.g. "x-schema". */
+          currentNode.setAttribute(name, value);
+        }
+
+        arrayPop(DOMPurify.removed);
+      } catch (_) {}
+    }
+    /* Execute a hook if present */
+
+
+    _executeHook('afterSanitizeAttributes', currentNode, null);
+  };
+  /**
+   * _sanitizeShadowDOM
+   *
+   * @param  {DocumentFragment} fragment to iterate over recursively
+   */
+
+
+  const _sanitizeShadowDOM = function _sanitizeShadowDOM(fragment) {
+    let shadowNode;
+
+    const shadowIterator = _createIterator(fragment);
+    /* Execute a hook if present */
+
+
+    _executeHook('beforeSanitizeShadowDOM', fragment, null);
+
+    while (shadowNode = shadowIterator.nextNode()) {
+      /* Execute a hook if present */
+      _executeHook('uponSanitizeShadowNode', shadowNode, null);
+      /* Sanitize tags and elements */
+
+
+      if (_sanitizeElements(shadowNode)) {
+        continue;
+      }
+      /* Deep shadow DOM detected */
+
+
+      if (shadowNode.content instanceof DocumentFragment) {
+        _sanitizeShadowDOM(shadowNode.content);
+      }
+      /* Check attributes, sanitize if necessary */
+
+
+      _sanitizeAttributes(shadowNode);
+    }
+    /* Execute a hook if present */
+
+
+    _executeHook('afterSanitizeShadowDOM', fragment, null);
+  };
+  /**
+   * Sanitize
+   * Public method providing core sanitation functionality
+   *
+   * @param {String|Node} dirty string or DOM node
+   * @param {Object} configuration object
+   */
+  // eslint-disable-next-line complexity
+
+
+  DOMPurify.sanitize = function (dirty) {
+    let cfg = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
+    let body;
+    let importedNode;
+    let currentNode;
+    let returnNode;
+    /* Make sure we have a string to sanitize.
+      DO NOT return early, as this will return the wrong type if
+      the user has requested a DOM object rather than a string */
+
+    IS_EMPTY_INPUT = !dirty;
+
+    if (IS_EMPTY_INPUT) {
+      dirty = '<!-->';
+    }
+    /* Stringify, in case dirty is an object */
+
+
+    if (typeof dirty !== 'string' && !_isNode(dirty)) {
+      // eslint-disable-next-line no-negated-condition
+      if (typeof dirty.toString !== 'function') {
+        throw typeErrorCreate('toString is not a function');
+      } else {
+        dirty = dirty.toString();
+
+        if (typeof dirty !== 'string') {
+          throw typeErrorCreate('dirty is not a string, aborting');
+        }
+      }
+    }
+    /* Return dirty HTML if DOMPurify cannot run */
+
+
+    if (!DOMPurify.isSupported) {
+      return dirty;
+    }
+    /* Assign config vars */
+
+
+    if (!SET_CONFIG) {
+      _parseConfig(cfg);
+    }
+    /* Clean up removed elements */
+
+
+    DOMPurify.removed = [];
+    /* Check if dirty is correctly typed for IN_PLACE */
+
+    if (typeof dirty === 'string') {
+      IN_PLACE = false;
+    }
+
+    if (IN_PLACE) {
+      /* Do some early pre-sanitization to avoid unsafe root nodes */
+      if (dirty.nodeName) {
+        const tagName = transformCaseFunc(dirty.nodeName);
+
+        if (!ALLOWED_TAGS[tagName] || FORBID_TAGS[tagName]) {
+          throw typeErrorCreate('root node is forbidden and cannot be sanitized in-place');
+        }
+      }
+    } else if (dirty instanceof Node) {
+      /* If dirty is a DOM element, append to an empty document to avoid
+         elements being stripped by the parser */
+      body = _initDocument('<!---->');
+      importedNode = body.ownerDocument.importNode(dirty, true);
+
+      if (importedNode.nodeType === 1 && importedNode.nodeName === 'BODY') {
+        /* Node is already a body, use as is */
+        body = importedNode;
+      } else if (importedNode.nodeName === 'HTML') {
+        body = importedNode;
+      } else {
+        // eslint-disable-next-line unicorn/prefer-dom-node-append
+        body.appendChild(importedNode);
+      }
+    } else {
+      /* Exit directly if we have nothing to do */
+      if (!RETURN_DOM && !SAFE_FOR_TEMPLATES && !WHOLE_DOCUMENT && // eslint-disable-next-line unicorn/prefer-includes
+      dirty.indexOf('<') === -1) {
+        return trustedTypesPolicy && RETURN_TRUSTED_TYPE ? trustedTypesPolicy.createHTML(dirty) : dirty;
+      }
+      /* Initialize the document to work on */
+
+
+      body = _initDocument(dirty);
+      /* Check we have a DOM node from the data */
+
+      if (!body) {
+        return RETURN_DOM ? null : RETURN_TRUSTED_TYPE ? emptyHTML : '';
+      }
+    }
+    /* Remove first element node (ours) if FORCE_BODY is set */
+
+
+    if (body && FORCE_BODY) {
+      _forceRemove(body.firstChild);
+    }
+    /* Get node iterator */
+
+
+    const nodeIterator = _createIterator(IN_PLACE ? dirty : body);
+    /* Now start iterating over the created document */
+
+
+    while (currentNode = nodeIterator.nextNode()) {
+      /* Sanitize tags and elements */
+      if (_sanitizeElements(currentNode)) {
+        continue;
+      }
+      /* Shadow DOM detected, sanitize it */
+
+
+      if (currentNode.content instanceof DocumentFragment) {
+        _sanitizeShadowDOM(currentNode.content);
+      }
+      /* Check attributes, sanitize if necessary */
+
+
+      _sanitizeAttributes(currentNode);
+    }
+    /* If we sanitized `dirty` in-place, return it. */
+
+
+    if (IN_PLACE) {
+      return dirty;
+    }
+    /* Return sanitized string or DOM */
+
+
+    if (RETURN_DOM) {
+      if (RETURN_DOM_FRAGMENT) {
+        returnNode = createDocumentFragment.call(body.ownerDocument);
+
+        while (body.firstChild) {
+          // eslint-disable-next-line unicorn/prefer-dom-node-append
+          returnNode.appendChild(body.firstChild);
+        }
+      } else {
+        returnNode = body;
+      }
+
+      if (ALLOWED_ATTR.shadowroot || ALLOWED_ATTR.shadowrootmod) {
+        /*
+          AdoptNode() is not used because internal state is not reset
+          (e.g. the past names map of a HTMLFormElement), this is safe
+          in theory but we would rather not risk another attack vector.
+          The state that is cloned by importNode() is explicitly defined
+          by the specs.
+        */
+        returnNode = importNode.call(originalDocument, returnNode, true);
+      }
+
+      return returnNode;
+    }
+
+    let serializedHTML = WHOLE_DOCUMENT ? body.outerHTML : body.innerHTML;
+    /* Serialize doctype if allowed */
+
+    if (WHOLE_DOCUMENT && ALLOWED_TAGS['!doctype'] && body.ownerDocument && body.ownerDocument.doctype && body.ownerDocument.doctype.name && regExpTest(DOCTYPE_NAME, body.ownerDocument.doctype.name)) {
+      serializedHTML = '<!DOCTYPE ' + body.ownerDocument.doctype.name + '>\n' + serializedHTML;
+    }
+    /* Sanitize final string template-safe */
+
+
+    if (SAFE_FOR_TEMPLATES) {
+      serializedHTML = stringReplace(serializedHTML, MUSTACHE_EXPR, ' ');
+      serializedHTML = stringReplace(serializedHTML, ERB_EXPR, ' ');
+      serializedHTML = stringReplace(serializedHTML, TMPLIT_EXPR, ' ');
+    }
+
+    return trustedTypesPolicy && RETURN_TRUSTED_TYPE ? trustedTypesPolicy.createHTML(serializedHTML) : serializedHTML;
+  };
+  /**
+   * Public method to set the configuration once
+   * setConfig
+   *
+   * @param {Object} cfg configuration object
+   */
+
+
+  DOMPurify.setConfig = function (cfg) {
+    _parseConfig(cfg);
+
+    SET_CONFIG = true;
+  };
+  /**
+   * Public method to remove the configuration
+   * clearConfig
+   *
+   */
+
+
+  DOMPurify.clearConfig = function () {
+    CONFIG = null;
+    SET_CONFIG = false;
+  };
+  /**
+   * Public method to check if an attribute value is valid.
+   * Uses last set config, if any. Otherwise, uses config defaults.
+   * isValidAttribute
+   *
+   * @param  {string} tag Tag name of containing element.
+   * @param  {string} attr Attribute name.
+   * @param  {string} value Attribute value.
+   * @return {Boolean} Returns true if `value` is valid. Otherwise, returns false.
+   */
+
+
+  DOMPurify.isValidAttribute = function (tag, attr, value) {
+    /* Initialize shared config vars if necessary. */
+    if (!CONFIG) {
+      _parseConfig({});
+    }
+
+    const lcTag = transformCaseFunc(tag);
+    const lcName = transformCaseFunc(attr);
+    return _isValidAttribute(lcTag, lcName, value);
+  };
+  /**
+   * AddHook
+   * Public method to add DOMPurify hooks
+   *
+   * @param {String} entryPoint entry point for the hook to add
+   * @param {Function} hookFunction function to execute
+   */
+
+
+  DOMPurify.addHook = function (entryPoint, hookFunction) {
+    if (typeof hookFunction !== 'function') {
+      return;
+    }
+
+    hooks[entryPoint] = hooks[entryPoint] || [];
+    arrayPush(hooks[entryPoint], hookFunction);
+  };
+  /**
+   * RemoveHook
+   * Public method to remove a DOMPurify hook at a given entryPoint
+   * (pops it from the stack of hooks if more are present)
+   *
+   * @param {String} entryPoint entry point for the hook to remove
+   * @return {Function} removed(popped) hook
+   */
+
+
+  DOMPurify.removeHook = function (entryPoint) {
+    if (hooks[entryPoint]) {
+      return arrayPop(hooks[entryPoint]);
+    }
+  };
+  /**
+   * RemoveHooks
+   * Public method to remove all DOMPurify hooks at a given entryPoint
+   *
+   * @param  {String} entryPoint entry point for the hooks to remove
+   */
+
+
+  DOMPurify.removeHooks = function (entryPoint) {
+    if (hooks[entryPoint]) {
+      hooks[entryPoint] = [];
+    }
+  };
+  /**
+   * RemoveAllHooks
+   * Public method to remove all DOMPurify hooks
+   *
+   */
+
+
+  DOMPurify.removeAllHooks = function () {
+    hooks = {};
+  };
+
+  return DOMPurify;
+}
+
+var purify = createDOMPurify();
+
+module.exports = purify;
+//# sourceMappingURL=purify.cjs.js.map

programming_language: JavaScript
filename: purify.cjs.js.map
change_type: ModificationType.ADD
diff: @@ -0,0 +1 @@
+{"version":3,"file":"purify.cjs.js","sources":["../src/utils.js","../src/tags.js","../src/attrs.js","../src/regexp.js","../src/purify.js"],"sourcesContent":["const {\n  entries,\n  setPrototypeOf,\n  isFrozen,\n  getPrototypeOf,\n  getOwnPropertyDescriptor,\n} = Object;\n\nlet { freeze, seal, create } = Object; // eslint-disable-line import/no-mutable-exports\nlet { apply, construct } = typeof Reflect !== 'undefined' && Reflect;\n\nif (!apply) {\n  apply = function (fun, thisValue, args) {\n    return fun.apply(thisValue, args);\n  };\n}\n\nif (!freeze) {\n  freeze = function (x) {\n    return x;\n  };\n}\n\nif (!seal) {\n  seal = function (x) {\n    return x;\n  };\n}\n\nif (!construct) {\n  construct = function (Func, args) {\n    return new Func(...args);\n  };\n}\n\nconst arrayForEach = unapply(Array.prototype.forEach);\nconst arrayIndexOf = unapply(Array.prototype.indexOf);\nconst arrayPop = unapply(Array.prototype.pop);\nconst arrayPush = unapply(Array.prototype.push);\nconst arraySlice = unapply(Array.prototype.slice);\n\nconst stringToLowerCase = unapply(String.prototype.toLowerCase);\nconst stringToString = unapply(String.prototype.toString);\nconst stringMatch = unapply(String.prototype.match);\nconst stringReplace = unapply(String.prototype.replace);\nconst stringIndexOf = unapply(String.prototype.indexOf);\nconst stringTrim = unapply(String.prototype.trim);\n\nconst regExpTest = unapply(RegExp.prototype.test);\n\nconst typeErrorCreate = unconstruct(TypeError);\n\nexport function unapply(func) {\n  return (thisArg, ...args) => apply(func, thisArg, args);\n}\n\nexport function unconstruct(func) {\n  return (...args) => construct(func, args);\n}\n\n/* Add properties to a lookup table */\nexport function addToSet(set, array, transformCaseFunc) {\n  transformCaseFunc = transformCaseFunc ? transformCaseFunc : stringToLowerCase;\n  if (setPrototypeOf) {\n    // Make 'in' and truthy checks like Boolean(set.constructor)\n    // independent of any properties defined on Object.prototype.\n    // Prevent prototype setters from intercepting set as a this value.\n    setPrototypeOf(set, null);\n  }\n\n  let l = array.length;\n  while (l--) {\n    let element = array[l];\n    if (typeof element === 'string') {\n      const lcElement = transformCaseFunc(element);\n      if (lcElement !== element) {\n        // Config presets (e.g. tags.js, attrs.js) are immutable.\n        if (!isFrozen(array)) {\n          array[l] = lcElement;\n        }\n\n        element = lcElement;\n      }\n    }\n\n    set[element] = true;\n  }\n\n  return set;\n}\n\n/* Shallow clone an object */\nexport function clone(object) {\n  const newObject = create(null);\n\n  for (const [property, value] of entries(object)) {\n    newObject[property] = value;\n  }\n\n  return newObject;\n}\n\n/* This method automatically checks if the prop is function\n * or getter and behaves accordingly. */\nfunction lookupGetter(object, prop) {\n  while (object !== null) {\n    const desc = getOwnPropertyDescriptor(object, prop);\n    if (desc) {\n      if (desc.get) {\n        return unapply(desc.get);\n      }\n\n      if (typeof desc.value === 'function') {\n        return unapply(desc.value);\n      }\n    }\n\n    object = getPrototypeOf(object);\n  }\n\n  function fallbackValue(element) {\n    console.warn('fallback value for', element);\n    return null;\n  }\n\n  return fallbackValue;\n}\n\nexport {\n  // Array\n  arrayForEach,\n  arrayIndexOf,\n  arrayPop,\n  arrayPush,\n  arraySlice,\n  // Object\n  entries,\n  freeze,\n  getPrototypeOf,\n  getOwnPropertyDescriptor,\n  isFrozen,\n  setPrototypeOf,\n  seal,\n  // RegExp\n  regExpTest,\n  // String\n  stringIndexOf,\n  stringMatch,\n  stringReplace,\n  stringToLowerCase,\n  stringToString,\n  stringTrim,\n  // Errors\n  typeErrorCreate,\n  // Other\n  lookupGetter,\n};\n","import { freeze } from './utils.js';\n\nexport const html = freeze([\n  'a',\n  'abbr',\n  'acronym',\n  'address',\n  'area',\n  'article',\n  'aside',\n  'audio',\n  'b',\n  'bdi',\n  'bdo',\n  'big',\n  'blink',\n  'blockquote',\n  'body',\n  'br',\n  'button',\n  'canvas',\n  'caption',\n  'center',\n  'cite',\n  'code',\n  'col',\n  'colgroup',\n  'content',\n  'data',\n  'datalist',\n  'dd',\n  'decorator',\n  'del',\n  'details',\n  'dfn',\n  'dialog',\n  'dir',\n  'div',\n  'dl',\n  'dt',\n  'element',\n  'em',\n  'fieldset',\n  'figcaption',\n  'figure',\n  'font',\n  'footer',\n  'form',\n  'h1',\n  'h2',\n  'h3',\n  'h4',\n  'h5',\n  'h6',\n  'head',\n  'header',\n  'hgroup',\n  'hr',\n  'html',\n  'i',\n  'img',\n  'input',\n  'ins',\n  'kbd',\n  'label',\n  'legend',\n  'li',\n  'main',\n  'map',\n  'mark',\n  'marquee',\n  'menu',\n  'menuitem',\n  'meter',\n  'nav',\n  'nobr',\n  'ol',\n  'optgroup',\n  'option',\n  'output',\n  'p',\n  'picture',\n  'pre',\n  'progress',\n  'q',\n  'rp',\n  'rt',\n  'ruby',\n  's',\n  'samp',\n  'section',\n  'select',\n  'shadow',\n  'small',\n  'source',\n  'spacer',\n  'span',\n  'strike',\n  'strong',\n  'style',\n  'sub',\n  'summary',\n  'sup',\n  'table',\n  'tbody',\n  'td',\n  'template',\n  'textarea',\n  'tfoot',\n  'th',\n  'thead',\n  'time',\n  'tr',\n  'track',\n  'tt',\n  'u',\n  'ul',\n  'var',\n  'video',\n  'wbr',\n]);\n\n// SVG\nexport const svg = freeze([\n  'svg',\n  'a',\n  'altglyph',\n  'altglyphdef',\n  'altglyphitem',\n  'animatecolor',\n  'animatemotion',\n  'animatetransform',\n  'circle',\n  'clippath',\n  'defs',\n  'desc',\n  'ellipse',\n  'filter',\n  'font',\n  'g',\n  'glyph',\n  'glyphref',\n  'hkern',\n  'image',\n  'line',\n  'lineargradient',\n  'marker',\n  'mask',\n  'metadata',\n  'mpath',\n  'path',\n  'pattern',\n  'polygon',\n  'polyline',\n  'radialgradient',\n  'rect',\n  'stop',\n  'style',\n  'switch',\n  'symbol',\n  'text',\n  'textpath',\n  'title',\n  'tref',\n  'tspan',\n  'view',\n  'vkern',\n]);\n\nexport const svgFilters = freeze([\n  'feBlend',\n  'feColorMatrix',\n  'feComponentTransfer',\n  'feComposite',\n  'feConvolveMatrix',\n  'feDiffuseLighting',\n  'feDisplacementMap',\n  'feDistantLight',\n  'feFlood',\n  'feFuncA',\n  'feFuncB',\n  'feFuncG',\n  'feFuncR',\n  'feGaussianBlur',\n  'feImage',\n  'feMerge',\n  'feMergeNode',\n  'feMorphology',\n  'feOffset',\n  'fePointLight',\n  'feSpecularLighting',\n  'feSpotLight',\n  'feTile',\n  'feTurbulence',\n]);\n\n// List of SVG elements that are disallowed by default.\n// We still need to know them so that we can do namespace\n// checks properly in case one wants to add them to\n// allow-list.\nexport const svgDisallowed = freeze([\n  'animate',\n  'color-profile',\n  'cursor',\n  'discard',\n  'fedropshadow',\n  'font-face',\n  'font-face-format',\n  'font-face-name',\n  'font-face-src',\n  'font-face-uri',\n  'foreignobject',\n  'hatch',\n  'hatchpath',\n  'mesh',\n  'meshgradient',\n  'meshpatch',\n  'meshrow',\n  'missing-glyph',\n  'script',\n  'set',\n  'solidcolor',\n  'unknown',\n  'use',\n]);\n\nexport const mathMl = freeze([\n  'math',\n  'menclose',\n  'merror',\n  'mfenced',\n  'mfrac',\n  'mglyph',\n  'mi',\n  'mlabeledtr',\n  'mmultiscripts',\n  'mn',\n  'mo',\n  'mover',\n  'mpadded',\n  'mphantom',\n  'mroot',\n  'mrow',\n  'ms',\n  'mspace',\n  'msqrt',\n  'mstyle',\n  'msub',\n  'msup',\n  'msubsup',\n  'mtable',\n  'mtd',\n  'mtext',\n  'mtr',\n  'munder',\n  'munderover',\n  'mprescripts',\n]);\n\n// Similarly to SVG, we want to know all MathML elements,\n// even those that we disallow by default.\nexport const mathMlDisallowed = freeze([\n  'maction',\n  'maligngroup',\n  'malignmark',\n  'mlongdiv',\n  'mscarries',\n  'mscarry',\n  'msgroup',\n  'mstack',\n  'msline',\n  'msrow',\n  'semantics',\n  'annotation',\n  'annotation-xml',\n  'mprescripts',\n  'none',\n]);\n\nexport const text = freeze(['#text']);\n","import { freeze } from './utils.js';\n\nexport const html = freeze([\n  'accept',\n  'action',\n  'align',\n  'alt',\n  'autocapitalize',\n  'autocomplete',\n  'autopictureinpicture',\n  'autoplay',\n  'background',\n  'bgcolor',\n  'border',\n  'capture',\n  'cellpadding',\n  'cellspacing',\n  'checked',\n  'cite',\n  'class',\n  'clear',\n  'color',\n  'cols',\n  'colspan',\n  'controls',\n  'controlslist',\n  'coords',\n  'crossorigin',\n  'datetime',\n  'decoding',\n  'default',\n  'dir',\n  'disabled',\n  'disablepictureinpicture',\n  'disableremoteplayback',\n  'download',\n  'draggable',\n  'enctype',\n  'enterkeyhint',\n  'face',\n  'for',\n  'headers',\n  'height',\n  'hidden',\n  'high',\n  'href',\n  'hreflang',\n  'id',\n  'inputmode',\n  'integrity',\n  'ismap',\n  'kind',\n  'label',\n  'lang',\n  'list',\n  'loading',\n  'loop',\n  'low',\n  'max',\n  'maxlength',\n  'media',\n  'method',\n  'min',\n  'minlength',\n  'multiple',\n  'muted',\n  'name',\n  'nonce',\n  'noshade',\n  'novalidate',\n  'nowrap',\n  'open',\n  'optimum',\n  'pattern',\n  'placeholder',\n  'playsinline',\n  'poster',\n  'preload',\n  'pubdate',\n  'radiogroup',\n  'readonly',\n  'rel',\n  'required',\n  'rev',\n  'reversed',\n  'role',\n  'rows',\n  'rowspan',\n  'spellcheck',\n  'scope',\n  'selected',\n  'shape',\n  'size',\n  'sizes',\n  'span',\n  'srclang',\n  'start',\n  'src',\n  'srcset',\n  'step',\n  'style',\n  'summary',\n  'tabindex',\n  'title',\n  'translate',\n  'type',\n  'usemap',\n  'valign',\n  'value',\n  'width',\n  'xmlns',\n  'slot',\n]);\n\nexport const svg = freeze([\n  'accent-height',\n  'accumulate',\n  'additive',\n  'alignment-baseline',\n  'ascent',\n  'attributename',\n  'attributetype',\n  'azimuth',\n  'basefrequency',\n  'baseline-shift',\n  'begin',\n  'bias',\n  'by',\n  'class',\n  'clip',\n  'clippathunits',\n  'clip-path',\n  'clip-rule',\n  'color',\n  'color-interpolation',\n  'color-interpolation-filters',\n  'color-profile',\n  'color-rendering',\n  'cx',\n  'cy',\n  'd',\n  'dx',\n  'dy',\n  'diffuseconstant',\n  'direction',\n  'display',\n  'divisor',\n  'dur',\n  'edgemode',\n  'elevation',\n  'end',\n  'fill',\n  'fill-opacity',\n  'fill-rule',\n  'filter',\n  'filterunits',\n  'flood-color',\n  'flood-opacity',\n  'font-family',\n  'font-size',\n  'font-size-adjust',\n  'font-stretch',\n  'font-style',\n  'font-variant',\n  'font-weight',\n  'fx',\n  'fy',\n  'g1',\n  'g2',\n  'glyph-name',\n  'glyphref',\n  'gradientunits',\n  'gradienttransform',\n  'height',\n  'href',\n  'id',\n  'image-rendering',\n  'in',\n  'in2',\n  'k',\n  'k1',\n  'k2',\n  'k3',\n  'k4',\n  'kerning',\n  'keypoints',\n  'keysplines',\n  'keytimes',\n  'lang',\n  'lengthadjust',\n  'letter-spacing',\n  'kernelmatrix',\n  'kernelunitlength',\n  'lighting-color',\n  'local',\n  'marker-end',\n  'marker-mid',\n  'marker-start',\n  'markerheight',\n  'markerunits',\n  'markerwidth',\n  'maskcontentunits',\n  'maskunits',\n  'max',\n  'mask',\n  'media',\n  'method',\n  'mode',\n  'min',\n  'name',\n  'numoctaves',\n  'offset',\n  'operator',\n  'opacity',\n  'order',\n  'orient',\n  'orientation',\n  'origin',\n  'overflow',\n  'paint-order',\n  'path',\n  'pathlength',\n  'patterncontentunits',\n  'patterntransform',\n  'patternunits',\n  'points',\n  'preservealpha',\n  'preserveaspectratio',\n  'primitiveunits',\n  'r',\n  'rx',\n  'ry',\n  'radius',\n  'refx',\n  'refy',\n  'repeatcount',\n  'repeatdur',\n  'restart',\n  'result',\n  'rotate',\n  'scale',\n  'seed',\n  'shape-rendering',\n  'specularconstant',\n  'specularexponent',\n  'spreadmethod',\n  'startoffset',\n  'stddeviation',\n  'stitchtiles',\n  'stop-color',\n  'stop-opacity',\n  'stroke-dasharray',\n  'stroke-dashoffset',\n  'stroke-linecap',\n  'stroke-linejoin',\n  'stroke-miterlimit',\n  'stroke-opacity',\n  'stroke',\n  'stroke-width',\n  'style',\n  'surfacescale',\n  'systemlanguage',\n  'tabindex',\n  'targetx',\n  'targety',\n  'transform',\n  'transform-origin',\n  'text-anchor',\n  'text-decoration',\n  'text-rendering',\n  'textlength',\n  'type',\n  'u1',\n  'u2',\n  'unicode',\n  'values',\n  'viewbox',\n  'visibility',\n  'version',\n  'vert-adv-y',\n  'vert-origin-x',\n  'vert-origin-y',\n  'width',\n  'word-spacing',\n  'wrap',\n  'writing-mode',\n  'xchannelselector',\n  'ychannelselector',\n  'x',\n  'x1',\n  'x2',\n  'xmlns',\n  'y',\n  'y1',\n  'y2',\n  'z',\n  'zoomandpan',\n]);\n\nexport const mathMl = freeze([\n  'accent',\n  'accentunder',\n  'align',\n  'bevelled',\n  'close',\n  'columnsalign',\n  'columnlines',\n  'columnspan',\n  'denomalign',\n  'depth',\n  'dir',\n  'display',\n  'displaystyle',\n  'encoding',\n  'fence',\n  'frame',\n  'height',\n  'href',\n  'id',\n  'largeop',\n  'length',\n  'linethickness',\n  'lspace',\n  'lquote',\n  'mathbackground',\n  'mathcolor',\n  'mathsize',\n  'mathvariant',\n  'maxsize',\n  'minsize',\n  'movablelimits',\n  'notation',\n  'numalign',\n  'open',\n  'rowalign',\n  'rowlines',\n  'rowspacing',\n  'rowspan',\n  'rspace',\n  'rquote',\n  'scriptlevel',\n  'scriptminsize',\n  'scriptsizemultiplier',\n  'selection',\n  'separator',\n  'separators',\n  'stretchy',\n  'subscriptshift',\n  'supscriptshift',\n  'symmetric',\n  'voffset',\n  'width',\n  'xmlns',\n]);\n\nexport const xml = freeze([\n  'xlink:href',\n  'xml:id',\n  'xlink:title',\n  'xml:space',\n  'xmlns:xlink',\n]);\n","import { seal } from './utils.js';\n\n// eslint-disable-next-line unicorn/better-regex\nexport const MUSTACHE_EXPR = seal(/\\{\\{[\\w\\W]*|[\\w\\W]*\\}\\}/gm); // Specify template detection regex for SAFE_FOR_TEMPLATES mode\nexport const ERB_EXPR = seal(/<%[\\w\\W]*|[\\w\\W]*%>/gm);\nexport const TMPLIT_EXPR = seal(/\\${[\\w\\W]*}/gm);\nexport const DATA_ATTR = seal(/^data-[\\-\\w.\\u00B7-\\uFFFF]/); // eslint-disable-line no-useless-escape\nexport const ARIA_ATTR = seal(/^aria-[\\-\\w]+$/); // eslint-disable-line no-useless-escape\nexport const IS_ALLOWED_URI = seal(\n  /^(?:(?:(?:f|ht)tps?|mailto|tel|callto|sms|cid|xmpp):|[^a-z]|[a-z+.\\-]+(?:[^a-z+.\\-:]|$))/i // eslint-disable-line no-useless-escape\n);\nexport const IS_SCRIPT_OR_DATA = seal(/^(?:\\w+script|data):/i);\nexport const ATTR_WHITESPACE = seal(\n  /[\\u0000-\\u0020\\u00A0\\u1680\\u180E\\u2000-\\u2029\\u205F\\u3000]/g // eslint-disable-line no-control-regex\n);\nexport const DOCTYPE_NAME = seal(/^html$/i);\n","import * as TAGS from './tags.js';\nimport * as ATTRS from './attrs.js';\nimport * as EXPRESSIONS from './regexp.js';\nimport {\n  addToSet,\n  clone,\n  entries,\n  freeze,\n  arrayForEach,\n  arrayPop,\n  arrayPush,\n  stringMatch,\n  stringReplace,\n  stringToLowerCase,\n  stringToString,\n  stringIndexOf,\n  stringTrim,\n  regExpTest,\n  typeErrorCreate,\n  lookupGetter,\n} from './utils.js';\n\nconst getGlobal = () => (typeof window === 'undefined' ? null : window);\n\n/**\n * Creates a no-op policy for internal use only.\n * Don't export this function outside this module!\n * @param {?TrustedTypePolicyFactory} trustedTypes The policy factory.\n * @param {Document} document The document object (to determine policy name suffix)\n * @return {?TrustedTypePolicy} The policy created (or null, if Trusted Types\n * are not supported).\n */\nconst _createTrustedTypesPolicy = function (trustedTypes, document) {\n  if (\n    typeof trustedTypes !== 'object' ||\n    typeof trustedTypes.createPolicy !== 'function'\n  ) {\n    return null;\n  }\n\n  // Allow the callers to control the unique policy name\n  // by adding a data-tt-policy-suffix to the script element with the DOMPurify.\n  // Policy creation with duplicate names throws in Trusted Types.\n  let suffix = null;\n  const ATTR_NAME = 'data-tt-policy-suffix';\n  if (\n    document.currentScript &&\n    document.currentScript.hasAttribute(ATTR_NAME)\n  ) {\n    suffix = document.currentScript.getAttribute(ATTR_NAME);\n  }\n\n  const policyName = 'dompurify' + (suffix ? '#' + suffix : '');\n\n  try {\n    return trustedTypes.createPolicy(policyName, {\n      createHTML(html) {\n        return html;\n      },\n      createScriptURL(scriptUrl) {\n        return scriptUrl;\n      },\n    });\n  } catch (_) {\n    // Policy creation failed (most likely another DOMPurify script has\n    // already run). Skip creating the policy, as this will only cause errors\n    // if TT are enforced.\n    console.warn(\n      'TrustedTypes policy ' + policyName + ' could not be created.'\n    );\n    return null;\n  }\n};\n\nfunction createDOMPurify(window = getGlobal()) {\n  const DOMPurify = (root) => createDOMPurify(root);\n\n  /**\n   * Version label, exposed for easier checks\n   * if DOMPurify is up to date or not\n   */\n  DOMPurify.version = VERSION;\n\n  /**\n   * Array of elements that DOMPurify removed during sanitation.\n   * Empty if nothing was removed.\n   */\n  DOMPurify.removed = [];\n\n  if (!window || !window.document || window.document.nodeType !== 9) {\n    // Not running in a browser, provide a factory function\n    // so that you can pass your own Window\n    DOMPurify.isSupported = false;\n\n    return DOMPurify;\n  }\n\n  const originalDocument = window.document;\n\n  let { document } = window;\n  const {\n    DocumentFragment,\n    HTMLTemplateElement,\n    Node,\n    Element,\n    NodeFilter,\n    NamedNodeMap = window.NamedNodeMap || window.MozNamedAttrMap,\n    HTMLFormElement,\n    DOMParser,\n    trustedTypes,\n  } = window;\n\n  const ElementPrototype = Element.prototype;\n\n  const cloneNode = lookupGetter(ElementPrototype, 'cloneNode');\n  const getNextSibling = lookupGetter(ElementPrototype, 'nextSibling');\n  const getChildNodes = lookupGetter(ElementPrototype, 'childNodes');\n  const getParentNode = lookupGetter(ElementPrototype, 'parentNode');\n\n  // As per issue #47, the web-components registry is inherited by a\n  // new document created via createHTMLDocument. As per the spec\n  // (http://w3c.github.io/webcomponents/spec/custom/#creating-and-passing-registries)\n  // a new empty registry is used when creating a template contents owner\n  // document, so we use that as our parent document to ensure nothing\n  // is inherited.\n  if (typeof HTMLTemplateElement === 'function') {\n    const template = document.createElement('template');\n    if (template.content && template.content.ownerDocument) {\n      document = template.content.ownerDocument;\n    }\n  }\n\n  const trustedTypesPolicy = _createTrustedTypesPolicy(\n    trustedTypes,\n    originalDocument\n  );\n  const emptyHTML = trustedTypesPolicy ? trustedTypesPolicy.createHTML('') : '';\n\n  const {\n    implementation,\n    createNodeIterator,\n    createDocumentFragment,\n    getElementsByTagName,\n  } = document;\n  const { importNode } = originalDocument;\n\n  let hooks = {};\n\n  /**\n   * Expose whether this browser supports running the full DOMPurify.\n   */\n  DOMPurify.isSupported =\n    typeof entries === 'function' &&\n    typeof getParentNode === 'function' &&\n    implementation &&\n    typeof implementation.createHTMLDocument !== 'undefined';\n\n  const {\n    MUSTACHE_EXPR,\n    ERB_EXPR,\n    TMPLIT_EXPR,\n    DATA_ATTR,\n    ARIA_ATTR,\n    IS_SCRIPT_OR_DATA,\n    ATTR_WHITESPACE,\n  } = EXPRESSIONS;\n\n  let { IS_ALLOWED_URI } = EXPRESSIONS;\n\n  /**\n   * We consider the elements and attributes below to be safe. Ideally\n   * don't add any new ones but feel free to remove unwanted ones.\n   */\n\n  /* allowed element names */\n  let ALLOWED_TAGS = null;\n  const DEFAULT_ALLOWED_TAGS = addToSet({}, [\n    ...TAGS.html,\n    ...TAGS.svg,\n    ...TAGS.svgFilters,\n    ...TAGS.mathMl,\n    ...TAGS.text,\n  ]);\n\n  /* Allowed attribute names */\n  let ALLOWED_ATTR = null;\n  const DEFAULT_ALLOWED_ATTR = addToSet({}, [\n    ...ATTRS.html,\n    ...ATTRS.svg,\n    ...ATTRS.mathMl,\n    ...ATTRS.xml,\n  ]);\n\n  /*\n   * Configure how DOMPUrify should handle custom elements and their attributes as well as customized built-in elements.\n   * @property {RegExp|Function|null} tagNameCheck one of [null, regexPattern, predicate]. Default: `null` (disallow any custom elements)\n   * @property {RegExp|Function|null} attributeNameCheck one of [null, regexPattern, predicate]. Default: `null` (disallow any attributes not on the allow list)\n   * @property {boolean} allowCustomizedBuiltInElements allow custom elements derived from built-ins if they pass CUSTOM_ELEMENT_HANDLING.tagNameCheck. Default: `false`.\n   */\n  let CUSTOM_ELEMENT_HANDLING = Object.seal(\n    Object.create(null, {\n      tagNameCheck: {\n        writable: true,\n        configurable: false,\n        enumerable: true,\n        value: null,\n      },\n      attributeNameCheck: {\n        writable: true,\n        configurable: false,\n        enumerable: true,\n        value: null,\n      },\n      allowCustomizedBuiltInElements: {\n        writable: true,\n        configurable: false,\n        enumerable: true,\n        value: false,\n      },\n    })\n  );\n\n  /* Explicitly forbidden tags (overrides ALLOWED_TAGS/ADD_TAGS) */\n  let FORBID_TAGS = null;\n\n  /* Explicitly forbidden attributes (overrides ALLOWED_ATTR/ADD_ATTR) */\n  let FORBID_ATTR = null;\n\n  /* Decide if ARIA attributes are okay */\n  let ALLOW_ARIA_ATTR = true;\n\n  /* Decide if custom data attributes are okay */\n  let ALLOW_DATA_ATTR = true;\n\n  /* Decide if unknown protocols are okay */\n  let ALLOW_UNKNOWN_PROTOCOLS = false;\n\n  /* Decide if self-closing tags in attributes are allowed.\n   * Usually removed due to a mXSS issue in jQuery 3.0 */\n  let ALLOW_SELF_CLOSE_IN_ATTR = true;\n\n  /* Output should be safe for common template engines.\n   * This means, DOMPurify removes data attributes, mustaches and ERB\n   */\n  let SAFE_FOR_TEMPLATES = false;\n\n  /* Decide if document with <html>... should be returned */\n  let WHOLE_DOCUMENT = false;\n\n  /* Track whether config is already set on this instance of DOMPurify. */\n  let SET_CONFIG = false;\n\n  /* Decide if all elements (e.g. style, script) must be children of\n   * document.body. By default, browsers might move them to document.head */\n  let FORCE_BODY = false;\n\n  /* Decide if a DOM `HTMLBodyElement` should be returned, instead of a html\n   * string (or a TrustedHTML object if Trusted Types are supported).\n   * If `WHOLE_DOCUMENT` is enabled a `HTMLHtmlElement` will be returned instead\n   */\n  let RETURN_DOM = false;\n\n  /* Decide if a DOM `DocumentFragment` should be returned, instead of a html\n   * string  (or a TrustedHTML object if Trusted Types are supported) */\n  let RETURN_DOM_FRAGMENT = false;\n\n  /* Try to return a Trusted Type object instead of a string, return a string in\n   * case Trusted Types are not supported  */\n  let RETURN_TRUSTED_TYPE = false;\n\n  /* Output should be free from DOM clobbering attacks?\n   * This sanitizes markups named with colliding, clobberable built-in DOM APIs.\n   */\n  let SANITIZE_DOM = true;\n\n  /* Achieve full DOM Clobbering protection by isolating the namespace of named\n   * properties and JS variables, mitigating attacks that abuse the HTML/DOM spec rules.\n   *\n   * HTML/DOM spec rules that enable DOM Clobbering:\n   *   - Named Access on Window (§7.3.3)\n   *   - DOM Tree Accessors (§3.1.5)\n   *   - Form Element Parent-Child Relations (§4.10.3)\n   *   - Iframe srcdoc / Nested WindowProxies (§4.8.5)\n   *   - HTMLCollection (§4.2.10.2)\n   *\n   * Namespace isolation is implemented by prefixing `id` and `name` attributes\n   * with a constant string, i.e., `user-content-`\n   */\n  let SANITIZE_NAMED_PROPS = false;\n  const SANITIZE_NAMED_PROPS_PREFIX = 'user-content-';\n\n  /* Keep element content when removing element? */\n  let KEEP_CONTENT = true;\n\n  /* If a `Node` is passed to sanitize(), then performs sanitization in-place instead\n   * of importing it into a new Document and returning a sanitized copy */\n  let IN_PLACE = false;\n\n  /* Allow usage of profiles like html, svg and mathMl */\n  let USE_PROFILES = {};\n\n  /* Tags to ignore content of when KEEP_CONTENT is true */\n  let FORBID_CONTENTS = null;\n  const DEFAULT_FORBID_CONTENTS = addToSet({}, [\n    'annotation-xml',\n    'audio',\n    'colgroup',\n    'desc',\n    'foreignobject',\n    'head',\n    'iframe',\n    'math',\n    'mi',\n    'mn',\n    'mo',\n    'ms',\n    'mtext',\n    'noembed',\n    'noframes',\n    'noscript',\n    'plaintext',\n    'script',\n    'style',\n    'svg',\n    'template',\n    'thead',\n    'title',\n    'video',\n    'xmp',\n  ]);\n\n  /* Tags that are safe for data: URIs */\n  let DATA_URI_TAGS = null;\n  const DEFAULT_DATA_URI_TAGS = addToSet({}, [\n    'audio',\n    'video',\n    'img',\n    'source',\n    'image',\n    'track',\n  ]);\n\n  /* Attributes safe for values like \"javascript:\" */\n  let URI_SAFE_ATTRIBUTES = null;\n  const DEFAULT_URI_SAFE_ATTRIBUTES = addToSet({}, [\n    'alt',\n    'class',\n    'for',\n    'id',\n    'label',\n    'name',\n    'pattern',\n    'placeholder',\n    'role',\n    'summary',\n    'title',\n    'value',\n    'style',\n    'xmlns',\n  ]);\n\n  const MATHML_NAMESPACE = 'http://www.w3.org/1998/Math/MathML';\n  const SVG_NAMESPACE = 'http://www.w3.org/2000/svg';\n  const HTML_NAMESPACE = 'http://www.w3.org/1999/xhtml';\n  /* Document namespace */\n  let NAMESPACE = HTML_NAMESPACE;\n  let IS_EMPTY_INPUT = false;\n\n  /* Allowed XHTML+XML namespaces */\n  let ALLOWED_NAMESPACES = null;\n  const DEFAULT_ALLOWED_NAMESPACES = addToSet(\n    {},\n    [MATHML_NAMESPACE, SVG_NAMESPACE, HTML_NAMESPACE],\n    stringToString\n  );\n\n  /* Parsing of strict XHTML documents */\n  let PARSER_MEDIA_TYPE;\n  const SUPPORTED_PARSER_MEDIA_TYPES = ['application/xhtml+xml', 'text/html'];\n  const DEFAULT_PARSER_MEDIA_TYPE = 'text/html';\n  let transformCaseFunc;\n\n  /* Keep a reference to config to pass to hooks */\n  let CONFIG = null;\n\n  /* Ideally, do not touch anything below this line */\n  /* ______________________________________________ */\n\n  const formElement = document.createElement('form');\n\n  const isRegexOrFunction = function (testValue) {\n    return testValue instanceof RegExp || testValue instanceof Function;\n  };\n\n  /**\n   * _parseConfig\n   *\n   * @param  {Object} cfg optional config literal\n   */\n  // eslint-disable-next-line complexity\n  const _parseConfig = function (cfg) {\n    if (CONFIG && CONFIG === cfg) {\n      return;\n    }\n\n    /* Shield configuration object from tampering */\n    if (!cfg || typeof cfg !== 'object') {\n      cfg = {};\n    }\n\n    /* Shield configuration object from prototype pollution */\n    cfg = clone(cfg);\n\n    PARSER_MEDIA_TYPE =\n      // eslint-disable-next-line unicorn/prefer-includes\n      SUPPORTED_PARSER_MEDIA_TYPES.indexOf(cfg.PARSER_MEDIA_TYPE) === -1\n        ? (PARSER_MEDIA_TYPE = DEFAULT_PARSER_MEDIA_TYPE)\n        : (PARSER_MEDIA_TYPE = cfg.PARSER_MEDIA_TYPE);\n\n    // HTML tags and attributes are not case-sensitive, converting to lowercase. Keeping XHTML as is.\n    transformCaseFunc =\n      PARSER_MEDIA_TYPE === 'application/xhtml+xml'\n        ? stringToString\n        : stringToLowerCase;\n\n    /* Set configuration parameters */\n    ALLOWED_TAGS =\n      'ALLOWED_TAGS' in cfg\n        ? addToSet({}, cfg.ALLOWED_TAGS, transformCaseFunc)\n        : DEFAULT_ALLOWED_TAGS;\n    ALLOWED_ATTR =\n      'ALLOWED_ATTR' in cfg\n        ? addToSet({}, cfg.ALLOWED_ATTR, transformCaseFunc)\n        : DEFAULT_ALLOWED_ATTR;\n    ALLOWED_NAMESPACES =\n      'ALLOWED_NAMESPACES' in cfg\n        ? addToSet({}, cfg.ALLOWED_NAMESPACES, stringToString)\n        : DEFAULT_ALLOWED_NAMESPACES;\n    URI_SAFE_ATTRIBUTES =\n      'ADD_URI_SAFE_ATTR' in cfg\n        ? addToSet(\n            clone(DEFAULT_URI_SAFE_ATTRIBUTES), // eslint-disable-line indent\n            cfg.ADD_URI_SAFE_ATTR, // eslint-disable-line indent\n            transformCaseFunc // eslint-disable-line indent\n          ) // eslint-disable-line indent\n        : DEFAULT_URI_SAFE_ATTRIBUTES;\n    DATA_URI_TAGS =\n      'ADD_DATA_URI_TAGS' in cfg\n        ? addToSet(\n            clone(DEFAULT_DATA_URI_TAGS), // eslint-disable-line indent\n            cfg.ADD_DATA_URI_TAGS, // eslint-disable-line indent\n            transformCaseFunc // eslint-disable-line indent\n          ) // eslint-disable-line indent\n        : DEFAULT_DATA_URI_TAGS;\n    FORBID_CONTENTS =\n      'FORBID_CONTENTS' in cfg\n        ? addToSet({}, cfg.FORBID_CONTENTS, transformCaseFunc)\n        : DEFAULT_FORBID_CONTENTS;\n    FORBID_TAGS =\n      'FORBID_TAGS' in cfg\n        ? addToSet({}, cfg.FORBID_TAGS, transformCaseFunc)\n        : {};\n    FORBID_ATTR =\n      'FORBID_ATTR' in cfg\n        ? addToSet({}, cfg.FORBID_ATTR, transformCaseFunc)\n        : {};\n    USE_PROFILES = 'USE_PROFILES' in cfg ? cfg.USE_PROFILES : false;\n    ALLOW_ARIA_ATTR = cfg.ALLOW_ARIA_ATTR !== false; // Default true\n    ALLOW_DATA_ATTR = cfg.ALLOW_DATA_ATTR !== false; // Default true\n    ALLOW_UNKNOWN_PROTOCOLS = cfg.ALLOW_UNKNOWN_PROTOCOLS || false; // Default false\n    ALLOW_SELF_CLOSE_IN_ATTR = cfg.ALLOW_SELF_CLOSE_IN_ATTR !== false; // Default true\n    SAFE_FOR_TEMPLATES = cfg.SAFE_FOR_TEMPLATES || false; // Default false\n    WHOLE_DOCUMENT = cfg.WHOLE_DOCUMENT || false; // Default false\n    RETURN_DOM = cfg.RETURN_DOM || false; // Default false\n    RETURN_DOM_FRAGMENT = cfg.RETURN_DOM_FRAGMENT || false; // Default false\n    RETURN_TRUSTED_TYPE = cfg.RETURN_TRUSTED_TYPE || false; // Default false\n    FORCE_BODY = cfg.FORCE_BODY || false; // Default false\n    SANITIZE_DOM = cfg.SANITIZE_DOM !== false; // Default true\n    SANITIZE_NAMED_PROPS = cfg.SANITIZE_NAMED_PROPS || false; // Default false\n    KEEP_CONTENT = cfg.KEEP_CONTENT !== false; // Default true\n    IN_PLACE = cfg.IN_PLACE || false; // Default false\n    IS_ALLOWED_URI = cfg.ALLOWED_URI_REGEXP || EXPRESSIONS.IS_ALLOWED_URI;\n    NAMESPACE = cfg.NAMESPACE || HTML_NAMESPACE;\n    CUSTOM_ELEMENT_HANDLING = cfg.CUSTOM_ELEMENT_HANDLING || {};\n    if (\n      cfg.CUSTOM_ELEMENT_HANDLING &&\n      isRegexOrFunction(cfg.CUSTOM_ELEMENT_HANDLING.tagNameCheck)\n    ) {\n      CUSTOM_ELEMENT_HANDLING.tagNameCheck =\n        cfg.CUSTOM_ELEMENT_HANDLING.tagNameCheck;\n    }\n\n    if (\n      cfg.CUSTOM_ELEMENT_HANDLING &&\n      isRegexOrFunction(cfg.CUSTOM_ELEMENT_HANDLING.attributeNameCheck)\n    ) {\n      CUSTOM_ELEMENT_HANDLING.attributeNameCheck =\n        cfg.CUSTOM_ELEMENT_HANDLING.attributeNameCheck;\n    }\n\n    if (\n      cfg.CUSTOM_ELEMENT_HANDLING &&\n      typeof cfg.CUSTOM_ELEMENT_HANDLING.allowCustomizedBuiltInElements ===\n        'boolean'\n    ) {\n      CUSTOM_ELEMENT_HANDLING.allowCustomizedBuiltInElements =\n        cfg.CUSTOM_ELEMENT_HANDLING.allowCustomizedBuiltInElements;\n    }\n\n    if (SAFE_FOR_TEMPLATES) {\n      ALLOW_DATA_ATTR = false;\n    }\n\n    if (RETURN_DOM_FRAGMENT) {\n      RETURN_DOM = true;\n    }\n\n    /* Parse profile info */\n    if (USE_PROFILES) {\n      ALLOWED_TAGS = addToSet({}, [...TAGS.text]);\n      ALLOWED_ATTR = [];\n      if (USE_PROFILES.html === true) {\n        addToSet(ALLOWED_TAGS, TAGS.html);\n        addToSet(ALLOWED_ATTR, ATTRS.html);\n      }\n\n      if (USE_PROFILES.svg === true) {\n        addToSet(ALLOWED_TAGS, TAGS.svg);\n        addToSet(ALLOWED_ATTR, ATTRS.svg);\n        addToSet(ALLOWED_ATTR, ATTRS.xml);\n      }\n\n      if (USE_PROFILES.svgFilters === true) {\n        addToSet(ALLOWED_TAGS, TAGS.svgFilters);\n        addToSet(ALLOWED_ATTR, ATTRS.svg);\n        addToSet(ALLOWED_ATTR, ATTRS.xml);\n      }\n\n      if (USE_PROFILES.mathMl === true) {\n        addToSet(ALLOWED_TAGS, TAGS.mathMl);\n        addToSet(ALLOWED_ATTR, ATTRS.mathMl);\n        addToSet(ALLOWED_ATTR, ATTRS.xml);\n      }\n    }\n\n    /* Merge configuration parameters */\n    if (cfg.ADD_TAGS) {\n      if (ALLOWED_TAGS === DEFAULT_ALLOWED_TAGS) {\n        ALLOWED_TAGS = clone(ALLOWED_TAGS);\n      }\n\n      addToSet(ALLOWED_TAGS, cfg.ADD_TAGS, transformCaseFunc);\n    }\n\n    if (cfg.ADD_ATTR) {\n      if (ALLOWED_ATTR === DEFAULT_ALLOWED_ATTR) {\n        ALLOWED_ATTR = clone(ALLOWED_ATTR);\n      }\n\n      addToSet(ALLOWED_ATTR, cfg.ADD_ATTR, transformCaseFunc);\n    }\n\n    if (cfg.ADD_URI_SAFE_ATTR) {\n      addToSet(URI_SAFE_ATTRIBUTES, cfg.ADD_URI_SAFE_ATTR, transformCaseFunc);\n    }\n\n    if (cfg.FORBID_CONTENTS) {\n      if (FORBID_CONTENTS === DEFAULT_FORBID_CONTENTS) {\n        FORBID_CONTENTS = clone(FORBID_CONTENTS);\n      }\n\n      addToSet(FORBID_CONTENTS, cfg.FORBID_CONTENTS, transformCaseFunc);\n    }\n\n    /* Add #text in case KEEP_CONTENT is set to true */\n    if (KEEP_CONTENT) {\n      ALLOWED_TAGS['#text'] = true;\n    }\n\n    /* Add html, head and body to ALLOWED_TAGS in case WHOLE_DOCUMENT is true */\n    if (WHOLE_DOCUMENT) {\n      addToSet(ALLOWED_TAGS, ['html', 'head', 'body']);\n    }\n\n    /* Add tbody to ALLOWED_TAGS in case tables are permitted, see #286, #365 */\n    if (ALLOWED_TAGS.table) {\n      addToSet(ALLOWED_TAGS, ['tbody']);\n      delete FORBID_TAGS.tbody;\n    }\n\n    // Prevent further manipulation of configuration.\n    // Not available in IE8, Safari 5, etc.\n    if (freeze) {\n      freeze(cfg);\n    }\n\n    CONFIG = cfg;\n  };\n\n  const MATHML_TEXT_INTEGRATION_POINTS = addToSet({}, [\n    'mi',\n    'mo',\n    'mn',\n    'ms',\n    'mtext',\n  ]);\n\n  const HTML_INTEGRATION_POINTS = addToSet({}, [\n    'foreignobject',\n    'desc',\n    'title',\n    'annotation-xml',\n  ]);\n\n  // Certain elements are allowed in both SVG and HTML\n  // namespace. We need to specify them explicitly\n  // so that they don't get erroneously deleted from\n  // HTML namespace.\n  const COMMON_SVG_AND_HTML_ELEMENTS = addToSet({}, [\n    'title',\n    'style',\n    'font',\n    'a',\n    'script',\n  ]);\n\n  /* Keep track of all possible SVG and MathML tags\n   * so that we can perform the namespace checks\n   * correctly. */\n  const ALL_SVG_TAGS = addToSet({}, TAGS.svg);\n  addToSet(ALL_SVG_TAGS, TAGS.svgFilters);\n  addToSet(ALL_SVG_TAGS, TAGS.svgDisallowed);\n\n  const ALL_MATHML_TAGS = addToSet({}, TAGS.mathMl);\n  addToSet(ALL_MATHML_TAGS, TAGS.mathMlDisallowed);\n\n  /**\n   *\n   *\n   * @param  {Element} element a DOM element whose namespace is being checked\n   * @returns {boolean} Return false if the element has a\n   *  namespace that a spec-compliant parser would never\n   *  return. Return true otherwise.\n   */\n  const _checkValidNamespace = function (element) {\n    let parent = getParentNode(element);\n\n    // In JSDOM, if we're inside shadow DOM, then parentNode\n    // can be null. We just simulate parent in this case.\n    if (!parent || !parent.tagName) {\n      parent = {\n        namespaceURI: NAMESPACE,\n        tagName: 'template',\n      };\n    }\n\n    const tagName = stringToLowerCase(element.tagName);\n    const parentTagName = stringToLowerCase(parent.tagName);\n\n    if (!ALLOWED_NAMESPACES[element.namespaceURI]) {\n      return false;\n    }\n\n    if (element.namespaceURI === SVG_NAMESPACE) {\n      // The only way to switch from HTML namespace to SVG\n      // is via <svg>. If it happens via any other tag, then\n      // it should be killed.\n      if (parent.namespaceURI === HTML_NAMESPACE) {\n        return tagName === 'svg';\n      }\n\n      // The only way to switch from MathML to SVG is via`\n      // svg if parent is either <annotation-xml> or MathML\n      // text integration points.\n      if (parent.namespaceURI === MATHML_NAMESPACE) {\n        return (\n          tagName === 'svg' &&\n          (parentTagName === 'annotation-xml' ||\n            MATHML_TEXT_INTEGRATION_POINTS[parentTagName])\n        );\n      }\n\n      // We only allow elements that are defined in SVG\n      // spec. All others are disallowed in SVG namespace.\n      return Boolean(ALL_SVG_TAGS[tagName]);\n    }\n\n    if (element.namespaceURI === MATHML_NAMESPACE) {\n      // The only way to switch from HTML namespace to MathML\n      // is via <math>. If it happens via any other tag, then\n      // it should be killed.\n      if (parent.namespaceURI === HTML_NAMESPACE) {\n        return tagName === 'math';\n      }\n\n      // The only way to switch from SVG to MathML is via\n      // <math> and HTML integration points\n      if (parent.namespaceURI === SVG_NAMESPACE) {\n        return tagName === 'math' && HTML_INTEGRATION_POINTS[parentTagName];\n      }\n\n      // We only allow elements that are defined in MathML\n      // spec. All others are disallowed in MathML namespace.\n      return Boolean(ALL_MATHML_TAGS[tagName]);\n    }\n\n    if (element.namespaceURI === HTML_NAMESPACE) {\n      // The only way to switch from SVG to HTML is via\n      // HTML integration points, and from MathML to HTML\n      // is via MathML text integration points\n      if (\n        parent.namespaceURI === SVG_NAMESPACE &&\n        !HTML_INTEGRATION_POINTS[parentTagName]\n      ) {\n        return false;\n      }\n\n      if (\n        parent.namespaceURI === MATHML_NAMESPACE &&\n        !MATHML_TEXT_INTEGRATION_POINTS[parentTagName]\n      ) {\n        return false;\n      }\n\n      // We disallow tags that are specific for MathML\n      // or SVG and should never appear in HTML namespace\n      return (\n        !ALL_MATHML_TAGS[tagName] &&\n        (COMMON_SVG_AND_HTML_ELEMENTS[tagName] || !ALL_SVG_TAGS[tagName])\n      );\n    }\n\n    // For XHTML and XML documents that support custom namespaces\n    if (\n      PARSER_MEDIA_TYPE === 'application/xhtml+xml' &&\n      ALLOWED_NAMESPACES[element.namespaceURI]\n    ) {\n      return true;\n    }\n\n    // The code should never reach this place (this means\n    // that the element somehow got namespace that is not\n    // HTML, SVG, MathML or allowed via ALLOWED_NAMESPACES).\n    // Return false just in case.\n    return false;\n  };\n\n  /**\n   * _forceRemove\n   *\n   * @param  {Node} node a DOM node\n   */\n  const _forceRemove = function (node) {\n    arrayPush(DOMPurify.removed, { element: node });\n    try {\n      // eslint-disable-next-line unicorn/prefer-dom-node-remove\n      node.parentNode.removeChild(node);\n    } catch (_) {\n      node.remove();\n    }\n  };\n\n  /**\n   * _removeAttribute\n   *\n   * @param  {String} name an Attribute name\n   * @param  {Node} node a DOM node\n   */\n  const _removeAttribute = function (name, node) {\n    try {\n      arrayPush(DOMPurify.removed, {\n        attribute: node.getAttributeNode(name),\n        from: node,\n      });\n    } catch (_) {\n      arrayPush(DOMPurify.removed, {\n        attribute: null,\n        from: node,\n      });\n    }\n\n    node.removeAttribute(name);\n\n    // We void attribute values for unremovable \"is\"\" attributes\n    if (name === 'is' && !ALLOWED_ATTR[name]) {\n      if (RETURN_DOM || RETURN_DOM_FRAGMENT) {\n        try {\n          _forceRemove(node);\n        } catch (_) {}\n      } else {\n        try {\n          node.setAttribute(name, '');\n        } catch (_) {}\n      }\n    }\n  };\n\n  /**\n   * _initDocument\n   *\n   * @param  {String} dirty a string of dirty markup\n   * @return {Document} a DOM, filled with the dirty markup\n   */\n  const _initDocument = function (dirty) {\n    /* Create a HTML document */\n    let doc;\n    let leadingWhitespace;\n\n    if (FORCE_BODY) {\n      dirty = '<remove></remove>' + dirty;\n    } else {\n      /* If FORCE_BODY isn't used, leading whitespace needs to be preserved manually */\n      const matches = stringMatch(dirty, /^[\\r\\n\\t ]+/);\n      leadingWhitespace = matches && matches[0];\n    }\n\n    if (\n      PARSER_MEDIA_TYPE === 'application/xhtml+xml' &&\n      NAMESPACE === HTML_NAMESPACE\n    ) {\n      // Root of XHTML doc must contain xmlns declaration (see https://www.w3.org/TR/xhtml1/normative.html#strict)\n      dirty =\n        '<html xmlns=\"http://www.w3.org/1999/xhtml\"><head></head><body>' +\n        dirty +\n        '</body></html>';\n    }\n\n    const dirtyPayload = trustedTypesPolicy\n      ? trustedTypesPolicy.createHTML(dirty)\n      : dirty;\n    /*\n     * Use the DOMParser API by default, fallback later if needs be\n     * DOMParser not work for svg when has multiple root element.\n     */\n    if (NAMESPACE === HTML_NAMESPACE) {\n      try {\n        doc = new DOMParser().parseFromString(dirtyPayload, PARSER_MEDIA_TYPE);\n      } catch (_) {}\n    }\n\n    /* Use createHTMLDocument in case DOMParser is not available */\n    if (!doc || !doc.documentElement) {\n      doc = implementation.createDocument(NAMESPACE, 'template', null);\n      try {\n        doc.documentElement.innerHTML = IS_EMPTY_INPUT\n          ? emptyHTML\n          : dirtyPayload;\n      } catch (_) {\n        // Syntax error if dirtyPayload is invalid xml\n      }\n    }\n\n    const body = doc.body || doc.documentElement;\n\n    if (dirty && leadingWhitespace) {\n      body.insertBefore(\n        document.createTextNode(leadingWhitespace),\n        body.childNodes[0] || null\n      );\n    }\n\n    /* Work on whole document or just its body */\n    if (NAMESPACE === HTML_NAMESPACE) {\n      return getElementsByTagName.call(\n        doc,\n        WHOLE_DOCUMENT ? 'html' : 'body'\n      )[0];\n    }\n\n    return WHOLE_DOCUMENT ? doc.documentElement : body;\n  };\n\n  /**\n   * _createIterator\n   *\n   * @param  {Document} root document/fragment to create iterator for\n   * @return {Iterator} iterator instance\n   */\n  const _createIterator = function (root) {\n    return createNodeIterator.call(\n      root.ownerDocument || root,\n      root,\n      // eslint-disable-next-line no-bitwise\n      NodeFilter.SHOW_ELEMENT | NodeFilter.SHOW_COMMENT | NodeFilter.SHOW_TEXT,\n      null,\n      false\n    );\n  };\n\n  /**\n   * _isClobbered\n   *\n   * @param  {Node} elm element to check for clobbering attacks\n   * @return {Boolean} true if clobbered, false if safe\n   */\n  const _isClobbered = function (elm) {\n    return (\n      elm instanceof HTMLFormElement &&\n      (typeof elm.nodeName !== 'string' ||\n        typeof elm.textContent !== 'string' ||\n        typeof elm.removeChild !== 'function' ||\n        !(elm.attributes instanceof NamedNodeMap) ||\n        typeof elm.removeAttribute !== 'function' ||\n        typeof elm.setAttribute !== 'function' ||\n        typeof elm.namespaceURI !== 'string' ||\n        typeof elm.insertBefore !== 'function' ||\n        typeof elm.hasChildNodes !== 'function')\n    );\n  };\n\n  /**\n   * _isNode\n   *\n   * @param  {Node} obj object to check whether it's a DOM node\n   * @return {Boolean} true is object is a DOM node\n   */\n  const _isNode = function (object) {\n    return typeof Node === 'object'\n      ? object instanceof Node\n      : object &&\n          typeof object === 'object' &&\n          typeof object.nodeType === 'number' &&\n          typeof object.nodeName === 'string';\n  };\n\n  /**\n   * _executeHook\n   * Execute user configurable hooks\n   *\n   * @param  {String} entryPoint  Name of the hook's entry point\n   * @param  {Node} currentNode node to work on with the hook\n   * @param  {Object} data additional hook parameters\n   */\n  const _executeHook = function (entryPoint, currentNode, data) {\n    if (!hooks[entryPoint]) {\n      return;\n    }\n\n    arrayForEach(hooks[entryPoint], (hook) => {\n      hook.call(DOMPurify, currentNode, data, CONFIG);\n    });\n  };\n\n  /**\n   * _sanitizeElements\n   *\n   * @protect nodeName\n   * @protect textContent\n   * @protect removeChild\n   *\n   * @param   {Node} currentNode to check for permission to exist\n   * @return  {Boolean} true if node was killed, false if left alive\n   */\n  const _sanitizeElements = function (currentNode) {\n    let content;\n\n    /* Execute a hook if present */\n    _executeHook('beforeSanitizeElements', currentNode, null);\n\n    /* Check if element is clobbered or can clobber */\n    if (_isClobbered(currentNode)) {\n      _forceRemove(currentNode);\n      return true;\n    }\n\n    /* Now let's check the element's type and name */\n    const tagName = transformCaseFunc(currentNode.nodeName);\n\n    /* Execute a hook if present */\n    _executeHook('uponSanitizeElement', currentNode, {\n      tagName,\n      allowedTags: ALLOWED_TAGS,\n    });\n\n    /* Detect mXSS attempts abusing namespace confusion */\n    if (\n      currentNode.hasChildNodes() &&\n      !_isNode(currentNode.firstElementChild) &&\n      (!_isNode(currentNode.content) ||\n        !_isNode(currentNode.content.firstElementChild)) &&\n      regExpTest(/<[/\\w]/g, currentNode.innerHTML) &&\n      regExpTest(/<[/\\w]/g, currentNode.textContent)\n    ) {\n      _forceRemove(currentNode);\n      return true;\n    }\n\n    /* Remove element if anything forbids its presence */\n    if (!ALLOWED_TAGS[tagName] || FORBID_TAGS[tagName]) {\n      /* Check if we have a custom element to handle */\n      if (!FORBID_TAGS[tagName] && _basicCustomElementTest(tagName)) {\n        if (\n          CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof RegExp &&\n          regExpTest(CUSTOM_ELEMENT_HANDLING.tagNameCheck, tagName)\n        )\n          return false;\n        if (\n          CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof Function &&\n          CUSTOM_ELEMENT_HANDLING.tagNameCheck(tagName)\n        )\n          return false;\n      }\n\n      /* Keep content except for bad-listed elements */\n      if (KEEP_CONTENT && !FORBID_CONTENTS[tagName]) {\n        const parentNode = getParentNode(currentNode) || currentNode.parentNode;\n        const childNodes = getChildNodes(currentNode) || currentNode.childNodes;\n\n        if (childNodes && parentNode) {\n          const childCount = childNodes.length;\n\n          for (let i = childCount - 1; i >= 0; --i) {\n            parentNode.insertBefore(\n              cloneNode(childNodes[i], true),\n              getNextSibling(currentNode)\n            );\n          }\n        }\n      }\n\n      _forceRemove(currentNode);\n      return true;\n    }\n\n    /* Check whether element has a valid namespace */\n    if (currentNode instanceof Element && !_checkValidNamespace(currentNode)) {\n      _forceRemove(currentNode);\n      return true;\n    }\n\n    /* Make sure that older browsers don't get noscript mXSS */\n    if (\n      (tagName === 'noscript' || tagName === 'noembed') &&\n      regExpTest(/<\\/no(script|embed)/i, currentNode.innerHTML)\n    ) {\n      _forceRemove(currentNode);\n      return true;\n    }\n\n    /* Sanitize element content to be template-safe */\n    if (SAFE_FOR_TEMPLATES && currentNode.nodeType === 3) {\n      /* Get the element's text content */\n      content = currentNode.textContent;\n      content = stringReplace(content, MUSTACHE_EXPR, ' ');\n      content = stringReplace(content, ERB_EXPR, ' ');\n      content = stringReplace(content, TMPLIT_EXPR, ' ');\n      if (currentNode.textContent !== content) {\n        arrayPush(DOMPurify.removed, { element: currentNode.cloneNode() });\n        currentNode.textContent = content;\n      }\n    }\n\n    /* Execute a hook if present */\n    _executeHook('afterSanitizeElements', currentNode, null);\n\n    return false;\n  };\n\n  /**\n   * _isValidAttribute\n   *\n   * @param  {string} lcTag Lowercase tag name of containing element.\n   * @param  {string} lcName Lowercase attribute name.\n   * @param  {string} value Attribute value.\n   * @return {Boolean} Returns true if `value` is valid, otherwise false.\n   */\n  // eslint-disable-next-line complexity\n  const _isValidAttribute = function (lcTag, lcName, value) {\n    /* Make sure attribute cannot clobber */\n    if (\n      SANITIZE_DOM &&\n      (lcName === 'id' || lcName === 'name') &&\n      (value in document || value in formElement)\n    ) {\n      return false;\n    }\n\n    /* Allow valid data-* attributes: At least one character after \"-\"\n        (https://html.spec.whatwg.org/multipage/dom.html#embedding-custom-non-visible-data-with-the-data-*-attributes)\n        XML-compatible (https://html.spec.whatwg.org/multipage/infrastructure.html#xml-compatible and http://www.w3.org/TR/xml/#d0e804)\n        We don't need to check the value; it's always URI safe. */\n    if (\n      ALLOW_DATA_ATTR &&\n      !FORBID_ATTR[lcName] &&\n      regExpTest(DATA_ATTR, lcName)\n    ) {\n      // This attribute is safe\n    } else if (ALLOW_ARIA_ATTR && regExpTest(ARIA_ATTR, lcName)) {\n      // This attribute is safe\n      /* Otherwise, check the name is permitted */\n    } else if (!ALLOWED_ATTR[lcName] || FORBID_ATTR[lcName]) {\n      if (\n        // First condition does a very basic check if a) it's basically a valid custom element tagname AND\n        // b) if the tagName passes whatever the user has configured for CUSTOM_ELEMENT_HANDLING.tagNameCheck\n        // and c) if the attribute name passes whatever the user has configured for CUSTOM_ELEMENT_HANDLING.attributeNameCheck\n        (_basicCustomElementTest(lcTag) &&\n          ((CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof RegExp &&\n            regExpTest(CUSTOM_ELEMENT_HANDLING.tagNameCheck, lcTag)) ||\n            (CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof Function &&\n              CUSTOM_ELEMENT_HANDLING.tagNameCheck(lcTag))) &&\n          ((CUSTOM_ELEMENT_HANDLING.attributeNameCheck instanceof RegExp &&\n            regExpTest(CUSTOM_ELEMENT_HANDLING.attributeNameCheck, lcName)) ||\n            (CUSTOM_ELEMENT_HANDLING.attributeNameCheck instanceof Function &&\n              CUSTOM_ELEMENT_HANDLING.attributeNameCheck(lcName)))) ||\n        // Alternative, second condition checks if it's an `is`-attribute, AND\n        // the value passes whatever the user has configured for CUSTOM_ELEMENT_HANDLING.tagNameCheck\n        (lcName === 'is' &&\n          CUSTOM_ELEMENT_HANDLING.allowCustomizedBuiltInElements &&\n          ((CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof RegExp &&\n            regExpTest(CUSTOM_ELEMENT_HANDLING.tagNameCheck, value)) ||\n            (CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof Function &&\n              CUSTOM_ELEMENT_HANDLING.tagNameCheck(value))))\n      ) {\n        // If user has supplied a regexp or function in CUSTOM_ELEMENT_HANDLING.tagNameCheck, we need to also allow derived custom elements using the same tagName test.\n        // Additionally, we need to allow attributes passing the CUSTOM_ELEMENT_HANDLING.attributeNameCheck user has configured, as custom elements can define these at their own discretion.\n      } else {\n        return false;\n      }\n      /* Check value is safe. First, is attr inert? If so, is safe */\n    } else if (URI_SAFE_ATTRIBUTES[lcName]) {\n      // This attribute is safe\n      /* Check no script, data or unknown possibly unsafe URI\n        unless we know URI values are safe for that attribute */\n    } else if (\n      regExpTest(IS_ALLOWED_URI, stringReplace(value, ATTR_WHITESPACE, ''))\n    ) {\n      // This attribute is safe\n      /* Keep image data URIs alive if src/xlink:href is allowed */\n      /* Further prevent gadget XSS for dynamically built script tags */\n    } else if (\n      (lcName === 'src' || lcName === 'xlink:href' || lcName === 'href') &&\n      lcTag !== 'script' &&\n      stringIndexOf(value, 'data:') === 0 &&\n      DATA_URI_TAGS[lcTag]\n    ) {\n      // This attribute is safe\n      /* Allow unknown protocols: This provides support for links that\n        are handled by protocol handlers which may be unknown ahead of\n        time, e.g. fb:, spotify: */\n    } else if (\n      ALLOW_UNKNOWN_PROTOCOLS &&\n      !regExpTest(IS_SCRIPT_OR_DATA, stringReplace(value, ATTR_WHITESPACE, ''))\n    ) {\n      // This attribute is safe\n      /* Check for binary attributes */\n      // eslint-disable-next-line no-negated-condition\n    } else if (!value) {\n      // Binary attributes are safe at this point\n      /* Anything else, presume unsafe, do not add it back */\n    } else {\n      return false;\n    }\n\n    return true;\n  };\n\n  /**\n   * _basicCustomElementCheck\n   * checks if at least one dash is included in tagName, and it's not the first char\n   * for more sophisticated checking see https://github.com/sindresorhus/validate-element-name\n   * @param {string} tagName name of the tag of the node to sanitize\n   */\n  const _basicCustomElementTest = function (tagName) {\n    return tagName.indexOf('-') > 0;\n  };\n\n  /**\n   * _sanitizeAttributes\n   *\n   * @protect attributes\n   * @protect nodeName\n   * @protect removeAttribute\n   * @protect setAttribute\n   *\n   * @param  {Node} currentNode to sanitize\n   */\n  const _sanitizeAttributes = function (currentNode) {\n    let attr;\n    let value;\n    let lcName;\n    let l;\n    /* Execute a hook if present */\n    _executeHook('beforeSanitizeAttributes', currentNode, null);\n\n    const { attributes } = currentNode;\n\n    /* Check if we have attributes; if not we might have a text node */\n    if (!attributes) {\n      return;\n    }\n\n    const hookEvent = {\n      attrName: '',\n      attrValue: '',\n      keepAttr: true,\n      allowedAttributes: ALLOWED_ATTR,\n    };\n    l = attributes.length;\n\n    /* Go backwards over all attributes; safely remove bad ones */\n    while (l--) {\n      attr = attributes[l];\n      const { name, namespaceURI } = attr;\n      value = name === 'value' ? attr.value : stringTrim(attr.value);\n      lcName = transformCaseFunc(name);\n\n      /* Execute a hook if present */\n      hookEvent.attrName = lcName;\n      hookEvent.attrValue = value;\n      hookEvent.keepAttr = true;\n      hookEvent.forceKeepAttr = undefined; // Allows developers to see this is a property they can set\n      _executeHook('uponSanitizeAttribute', currentNode, hookEvent);\n      value = hookEvent.attrValue;\n      /* Did the hooks approve of the attribute? */\n      if (hookEvent.forceKeepAttr) {\n        continue;\n      }\n\n      /* Remove attribute */\n      _removeAttribute(name, currentNode);\n\n      /* Did the hooks approve of the attribute? */\n      if (!hookEvent.keepAttr) {\n        continue;\n      }\n\n      /* Work around a security issue in jQuery 3.0 */\n      if (!ALLOW_SELF_CLOSE_IN_ATTR && regExpTest(/\\/>/i, value)) {\n        _removeAttribute(name, currentNode);\n        continue;\n      }\n\n      /* Sanitize attribute content to be template-safe */\n      if (SAFE_FOR_TEMPLATES) {\n        value = stringReplace(value, MUSTACHE_EXPR, ' ');\n        value = stringReplace(value, ERB_EXPR, ' ');\n        value = stringReplace(value, TMPLIT_EXPR, ' ');\n      }\n\n      /* Is `value` valid for this attribute? */\n      const lcTag = transformCaseFunc(currentNode.nodeName);\n      if (!_isValidAttribute(lcTag, lcName, value)) {\n        continue;\n      }\n\n      /* Full DOM Clobbering protection via namespace isolation,\n       * Prefix id and name attributes with `user-content-`\n       */\n      if (SANITIZE_NAMED_PROPS && (lcName === 'id' || lcName === 'name')) {\n        // Remove the attribute with this value\n        _removeAttribute(name, currentNode);\n\n        // Prefix the value and later re-create the attribute with the sanitized value\n        value = SANITIZE_NAMED_PROPS_PREFIX + value;\n      }\n\n      /* Handle attributes that require Trusted Types */\n      if (\n        trustedTypesPolicy &&\n        typeof trustedTypes === 'object' &&\n        typeof trustedTypes.getAttributeType === 'function'\n      ) {\n        if (namespaceURI) {\n          /* Namespaces are not yet supported, see https://bugs.chromium.org/p/chromium/issues/detail?id=1305293 */\n        } else {\n          switch (trustedTypes.getAttributeType(lcTag, lcName)) {\n            case 'TrustedHTML':\n              value = trustedTypesPolicy.createHTML(value);\n              break;\n            case 'TrustedScriptURL':\n              value = trustedTypesPolicy.createScriptURL(value);\n              break;\n            default:\n              break;\n          }\n        }\n      }\n\n      /* Handle invalid data-* attribute set by try-catching it */\n      try {\n        if (namespaceURI) {\n          currentNode.setAttributeNS(namespaceURI, name, value);\n        } else {\n          /* Fallback to setAttribute() for browser-unrecognized namespaces e.g. \"x-schema\". */\n          currentNode.setAttribute(name, value);\n        }\n\n        arrayPop(DOMPurify.removed);\n      } catch (_) {}\n    }\n\n    /* Execute a hook if present */\n    _executeHook('afterSanitizeAttributes', currentNode, null);\n  };\n\n  /**\n   * _sanitizeShadowDOM\n   *\n   * @param  {DocumentFragment} fragment to iterate over recursively\n   */\n  const _sanitizeShadowDOM = function (fragment) {\n    let shadowNode;\n    const shadowIterator = _createIterator(fragment);\n\n    /* Execute a hook if present */\n    _executeHook('beforeSanitizeShadowDOM', fragment, null);\n\n    while ((shadowNode = shadowIterator.nextNode())) {\n      /* Execute a hook if present */\n      _executeHook('uponSanitizeShadowNode', shadowNode, null);\n\n      /* Sanitize tags and elements */\n      if (_sanitizeElements(shadowNode)) {\n        continue;\n      }\n\n      /* Deep shadow DOM detected */\n      if (shadowNode.content instanceof DocumentFragment) {\n        _sanitizeShadowDOM(shadowNode.content);\n      }\n\n      /* Check attributes, sanitize if necessary */\n      _sanitizeAttributes(shadowNode);\n    }\n\n    /* Execute a hook if present */\n    _executeHook('afterSanitizeShadowDOM', fragment, null);\n  };\n\n  /**\n   * Sanitize\n   * Public method providing core sanitation functionality\n   *\n   * @param {String|Node} dirty string or DOM node\n   * @param {Object} configuration object\n   */\n  // eslint-disable-next-line complexity\n  DOMPurify.sanitize = function (dirty, cfg = {}) {\n    let body;\n    let importedNode;\n    let currentNode;\n    let returnNode;\n    /* Make sure we have a string to sanitize.\n      DO NOT return early, as this will return the wrong type if\n      the user has requested a DOM object rather than a string */\n    IS_EMPTY_INPUT = !dirty;\n    if (IS_EMPTY_INPUT) {\n      dirty = '<!-->';\n    }\n\n    /* Stringify, in case dirty is an object */\n    if (typeof dirty !== 'string' && !_isNode(dirty)) {\n      // eslint-disable-next-line no-negated-condition\n      if (typeof dirty.toString !== 'function') {\n        throw typeErrorCreate('toString is not a function');\n      } else {\n        dirty = dirty.toString();\n        if (typeof dirty !== 'string') {\n          throw typeErrorCreate('dirty is not a string, aborting');\n        }\n      }\n    }\n\n    /* Return dirty HTML if DOMPurify cannot run */\n    if (!DOMPurify.isSupported) {\n      return dirty;\n    }\n\n    /* Assign config vars */\n    if (!SET_CONFIG) {\n      _parseConfig(cfg);\n    }\n\n    /* Clean up removed elements */\n    DOMPurify.removed = [];\n\n    /* Check if dirty is correctly typed for IN_PLACE */\n    if (typeof dirty === 'string') {\n      IN_PLACE = false;\n    }\n\n    if (IN_PLACE) {\n      /* Do some early pre-sanitization to avoid unsafe root nodes */\n      if (dirty.nodeName) {\n        const tagName = transformCaseFunc(dirty.nodeName);\n        if (!ALLOWED_TAGS[tagName] || FORBID_TAGS[tagName]) {\n          throw typeErrorCreate(\n            'root node is forbidden and cannot be sanitized in-place'\n          );\n        }\n      }\n    } else if (dirty instanceof Node) {\n      /* If dirty is a DOM element, append to an empty document to avoid\n         elements being stripped by the parser */\n      body = _initDocument('<!---->');\n      importedNode = body.ownerDocument.importNode(dirty, true);\n      if (importedNode.nodeType === 1 && importedNode.nodeName === 'BODY') {\n        /* Node is already a body, use as is */\n        body = importedNode;\n      } else if (importedNode.nodeName === 'HTML') {\n        body = importedNode;\n      } else {\n        // eslint-disable-next-line unicorn/prefer-dom-node-append\n        body.appendChild(importedNode);\n      }\n    } else {\n      /* Exit directly if we have nothing to do */\n      if (\n        !RETURN_DOM &&\n        !SAFE_FOR_TEMPLATES &&\n        !WHOLE_DOCUMENT &&\n        // eslint-disable-next-line unicorn/prefer-includes\n        dirty.indexOf('<') === -1\n      ) {\n        return trustedTypesPolicy && RETURN_TRUSTED_TYPE\n          ? trustedTypesPolicy.createHTML(dirty)\n          : dirty;\n      }\n\n      /* Initialize the document to work on */\n      body = _initDocument(dirty);\n\n      /* Check we have a DOM node from the data */\n      if (!body) {\n        return RETURN_DOM ? null : RETURN_TRUSTED_TYPE ? emptyHTML : '';\n      }\n    }\n\n    /* Remove first element node (ours) if FORCE_BODY is set */\n    if (body && FORCE_BODY) {\n      _forceRemove(body.firstChild);\n    }\n\n    /* Get node iterator */\n    const nodeIterator = _createIterator(IN_PLACE ? dirty : body);\n\n    /* Now start iterating over the created document */\n    while ((currentNode = nodeIterator.nextNode())) {\n      /* Sanitize tags and elements */\n      if (_sanitizeElements(currentNode)) {\n        continue;\n      }\n\n      /* Shadow DOM detected, sanitize it */\n      if (currentNode.content instanceof DocumentFragment) {\n        _sanitizeShadowDOM(currentNode.content);\n      }\n\n      /* Check attributes, sanitize if necessary */\n      _sanitizeAttributes(currentNode);\n    }\n\n    /* If we sanitized `dirty` in-place, return it. */\n    if (IN_PLACE) {\n      return dirty;\n    }\n\n    /* Return sanitized string or DOM */\n    if (RETURN_DOM) {\n      if (RETURN_DOM_FRAGMENT) {\n        returnNode = createDocumentFragment.call(body.ownerDocument);\n\n        while (body.firstChild) {\n          // eslint-disable-next-line unicorn/prefer-dom-node-append\n          returnNode.appendChild(body.firstChild);\n        }\n      } else {\n        returnNode = body;\n      }\n\n      if (ALLOWED_ATTR.shadowroot || ALLOWED_ATTR.shadowrootmod) {\n        /*\n          AdoptNode() is not used because internal state is not reset\n          (e.g. the past names map of a HTMLFormElement), this is safe\n          in theory but we would rather not risk another attack vector.\n          The state that is cloned by importNode() is explicitly defined\n          by the specs.\n        */\n        returnNode = importNode.call(originalDocument, returnNode, true);\n      }\n\n      return returnNode;\n    }\n\n    let serializedHTML = 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\ No newline at end of file

programming_language: JavaScript
filename: purify.es.js
change_type: ModificationType.ADD
diff: @@ -0,0 +1,1595 @@
+/*! @license DOMPurify 3.0.2 | (c) Cure53 and other contributors | Released under the Apache license 2.0 and Mozilla Public License 2.0 | github.com/cure53/DOMPurify/blob/3.0.2/LICENSE */
+
+const {
+  entries,
+  setPrototypeOf,
+  isFrozen,
+  getPrototypeOf,
+  getOwnPropertyDescriptor
+} = Object;
+let {
+  freeze,
+  seal,
+  create
+} = Object; // eslint-disable-line import/no-mutable-exports
+
+let {
+  apply,
+  construct
+} = typeof Reflect !== 'undefined' && Reflect;
+
+if (!apply) {
+  apply = function apply(fun, thisValue, args) {
+    return fun.apply(thisValue, args);
+  };
+}
+
+if (!freeze) {
+  freeze = function freeze(x) {
+    return x;
+  };
+}
+
+if (!seal) {
+  seal = function seal(x) {
+    return x;
+  };
+}
+
+if (!construct) {
+  construct = function construct(Func, args) {
+    return new Func(...args);
+  };
+}
+
+const arrayForEach = unapply(Array.prototype.forEach);
+const arrayPop = unapply(Array.prototype.pop);
+const arrayPush = unapply(Array.prototype.push);
+const stringToLowerCase = unapply(String.prototype.toLowerCase);
+const stringToString = unapply(String.prototype.toString);
+const stringMatch = unapply(String.prototype.match);
+const stringReplace = unapply(String.prototype.replace);
+const stringIndexOf = unapply(String.prototype.indexOf);
+const stringTrim = unapply(String.prototype.trim);
+const regExpTest = unapply(RegExp.prototype.test);
+const typeErrorCreate = unconstruct(TypeError);
+function unapply(func) {
+  return function (thisArg) {
+    for (var _len = arguments.length, args = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
+      args[_key - 1] = arguments[_key];
+    }
+
+    return apply(func, thisArg, args);
+  };
+}
+function unconstruct(func) {
+  return function () {
+    for (var _len2 = arguments.length, args = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
+      args[_key2] = arguments[_key2];
+    }
+
+    return construct(func, args);
+  };
+}
+/* Add properties to a lookup table */
+
+function addToSet(set, array, transformCaseFunc) {
+  transformCaseFunc = transformCaseFunc ? transformCaseFunc : stringToLowerCase;
+
+  if (setPrototypeOf) {
+    // Make 'in' and truthy checks like Boolean(set.constructor)
+    // independent of any properties defined on Object.prototype.
+    // Prevent prototype setters from intercepting set as a this value.
+    setPrototypeOf(set, null);
+  }
+
+  let l = array.length;
+
+  while (l--) {
+    let element = array[l];
+
+    if (typeof element === 'string') {
+      const lcElement = transformCaseFunc(element);
+
+      if (lcElement !== element) {
+        // Config presets (e.g. tags.js, attrs.js) are immutable.
+        if (!isFrozen(array)) {
+          array[l] = lcElement;
+        }
+
+        element = lcElement;
+      }
+    }
+
+    set[element] = true;
+  }
+
+  return set;
+}
+/* Shallow clone an object */
+
+function clone(object) {
+  const newObject = create(null);
+
+  for (const [property, value] of entries(object)) {
+    newObject[property] = value;
+  }
+
+  return newObject;
+}
+/* This method automatically checks if the prop is function
+ * or getter and behaves accordingly. */
+
+function lookupGetter(object, prop) {
+  while (object !== null) {
+    const desc = getOwnPropertyDescriptor(object, prop);
+
+    if (desc) {
+      if (desc.get) {
+        return unapply(desc.get);
+      }
+
+      if (typeof desc.value === 'function') {
+        return unapply(desc.value);
+      }
+    }
+
+    object = getPrototypeOf(object);
+  }
+
+  function fallbackValue(element) {
+    console.warn('fallback value for', element);
+    return null;
+  }
+
+  return fallbackValue;
+}
+
+const html$1 = freeze(['a', 'abbr', 'acronym', 'address', 'area', 'article', 'aside', 'audio', 'b', 'bdi', 'bdo', 'big', 'blink', 'blockquote', 'body', 'br', 'button', 'canvas', 'caption', 'center', 'cite', 'code', 'col', 'colgroup', 'content', 'data', 'datalist', 'dd', 'decorator', 'del', 'details', 'dfn', 'dialog', 'dir', 'div', 'dl', 'dt', 'element', 'em', 'fieldset', 'figcaption', 'figure', 'font', 'footer', 'form', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'head', 'header', 'hgroup', 'hr', 'html', 'i', 'img', 'input', 'ins', 'kbd', 'label', 'legend', 'li', 'main', 'map', 'mark', 'marquee', 'menu', 'menuitem', 'meter', 'nav', 'nobr', 'ol', 'optgroup', 'option', 'output', 'p', 'picture', 'pre', 'progress', 'q', 'rp', 'rt', 'ruby', 's', 'samp', 'section', 'select', 'shadow', 'small', 'source', 'spacer', 'span', 'strike', 'strong', 'style', 'sub', 'summary', 'sup', 'table', 'tbody', 'td', 'template', 'textarea', 'tfoot', 'th', 'thead', 'time', 'tr', 'track', 'tt', 'u', 'ul', 'var', 'video', 'wbr']); // SVG
+
+const svg$1 = freeze(['svg', 'a', 'altglyph', 'altglyphdef', 'altglyphitem', 'animatecolor', 'animatemotion', 'animatetransform', 'circle', 'clippath', 'defs', 'desc', 'ellipse', 'filter', 'font', 'g', 'glyph', 'glyphref', 'hkern', 'image', 'line', 'lineargradient', 'marker', 'mask', 'metadata', 'mpath', 'path', 'pattern', 'polygon', 'polyline', 'radialgradient', 'rect', 'stop', 'style', 'switch', 'symbol', 'text', 'textpath', 'title', 'tref', 'tspan', 'view', 'vkern']);
+const svgFilters = freeze(['feBlend', 'feColorMatrix', 'feComponentTransfer', 'feComposite', 'feConvolveMatrix', 'feDiffuseLighting', 'feDisplacementMap', 'feDistantLight', 'feFlood', 'feFuncA', 'feFuncB', 'feFuncG', 'feFuncR', 'feGaussianBlur', 'feImage', 'feMerge', 'feMergeNode', 'feMorphology', 'feOffset', 'fePointLight', 'feSpecularLighting', 'feSpotLight', 'feTile', 'feTurbulence']); // List of SVG elements that are disallowed by default.
+// We still need to know them so that we can do namespace
+// checks properly in case one wants to add them to
+// allow-list.
+
+const svgDisallowed = freeze(['animate', 'color-profile', 'cursor', 'discard', 'fedropshadow', 'font-face', 'font-face-format', 'font-face-name', 'font-face-src', 'font-face-uri', 'foreignobject', 'hatch', 'hatchpath', 'mesh', 'meshgradient', 'meshpatch', 'meshrow', 'missing-glyph', 'script', 'set', 'solidcolor', 'unknown', 'use']);
+const mathMl$1 = freeze(['math', 'menclose', 'merror', 'mfenced', 'mfrac', 'mglyph', 'mi', 'mlabeledtr', 'mmultiscripts', 'mn', 'mo', 'mover', 'mpadded', 'mphantom', 'mroot', 'mrow', 'ms', 'mspace', 'msqrt', 'mstyle', 'msub', 'msup', 'msubsup', 'mtable', 'mtd', 'mtext', 'mtr', 'munder', 'munderover', 'mprescripts']); // Similarly to SVG, we want to know all MathML elements,
+// even those that we disallow by default.
+
+const mathMlDisallowed = freeze(['maction', 'maligngroup', 'malignmark', 'mlongdiv', 'mscarries', 'mscarry', 'msgroup', 'mstack', 'msline', 'msrow', 'semantics', 'annotation', 'annotation-xml', 'mprescripts', 'none']);
+const text = freeze(['#text']);
+
+const html = freeze(['accept', 'action', 'align', 'alt', 'autocapitalize', 'autocomplete', 'autopictureinpicture', 'autoplay', 'background', 'bgcolor', 'border', 'capture', 'cellpadding', 'cellspacing', 'checked', 'cite', 'class', 'clear', 'color', 'cols', 'colspan', 'controls', 'controlslist', 'coords', 'crossorigin', 'datetime', 'decoding', 'default', 'dir', 'disabled', 'disablepictureinpicture', 'disableremoteplayback', 'download', 'draggable', 'enctype', 'enterkeyhint', 'face', 'for', 'headers', 'height', 'hidden', 'high', 'href', 'hreflang', 'id', 'inputmode', 'integrity', 'ismap', 'kind', 'label', 'lang', 'list', 'loading', 'loop', 'low', 'max', 'maxlength', 'media', 'method', 'min', 'minlength', 'multiple', 'muted', 'name', 'nonce', 'noshade', 'novalidate', 'nowrap', 'open', 'optimum', 'pattern', 'placeholder', 'playsinline', 'poster', 'preload', 'pubdate', 'radiogroup', 'readonly', 'rel', 'required', 'rev', 'reversed', 'role', 'rows', 'rowspan', 'spellcheck', 'scope', 'selected', 'shape', 'size', 'sizes', 'span', 'srclang', 'start', 'src', 'srcset', 'step', 'style', 'summary', 'tabindex', 'title', 'translate', 'type', 'usemap', 'valign', 'value', 'width', 'xmlns', 'slot']);
+const svg = freeze(['accent-height', 'accumulate', 'additive', 'alignment-baseline', 'ascent', 'attributename', 'attributetype', 'azimuth', 'basefrequency', 'baseline-shift', 'begin', 'bias', 'by', 'class', 'clip', 'clippathunits', 'clip-path', 'clip-rule', 'color', 'color-interpolation', 'color-interpolation-filters', 'color-profile', 'color-rendering', 'cx', 'cy', 'd', 'dx', 'dy', 'diffuseconstant', 'direction', 'display', 'divisor', 'dur', 'edgemode', 'elevation', 'end', 'fill', 'fill-opacity', 'fill-rule', 'filter', 'filterunits', 'flood-color', 'flood-opacity', 'font-family', 'font-size', 'font-size-adjust', 'font-stretch', 'font-style', 'font-variant', 'font-weight', 'fx', 'fy', 'g1', 'g2', 'glyph-name', 'glyphref', 'gradientunits', 'gradienttransform', 'height', 'href', 'id', 'image-rendering', 'in', 'in2', 'k', 'k1', 'k2', 'k3', 'k4', 'kerning', 'keypoints', 'keysplines', 'keytimes', 'lang', 'lengthadjust', 'letter-spacing', 'kernelmatrix', 'kernelunitlength', 'lighting-color', 'local', 'marker-end', 'marker-mid', 'marker-start', 'markerheight', 'markerunits', 'markerwidth', 'maskcontentunits', 'maskunits', 'max', 'mask', 'media', 'method', 'mode', 'min', 'name', 'numoctaves', 'offset', 'operator', 'opacity', 'order', 'orient', 'orientation', 'origin', 'overflow', 'paint-order', 'path', 'pathlength', 'patterncontentunits', 'patterntransform', 'patternunits', 'points', 'preservealpha', 'preserveaspectratio', 'primitiveunits', 'r', 'rx', 'ry', 'radius', 'refx', 'refy', 'repeatcount', 'repeatdur', 'restart', 'result', 'rotate', 'scale', 'seed', 'shape-rendering', 'specularconstant', 'specularexponent', 'spreadmethod', 'startoffset', 'stddeviation', 'stitchtiles', 'stop-color', 'stop-opacity', 'stroke-dasharray', 'stroke-dashoffset', 'stroke-linecap', 'stroke-linejoin', 'stroke-miterlimit', 'stroke-opacity', 'stroke', 'stroke-width', 'style', 'surfacescale', 'systemlanguage', 'tabindex', 'targetx', 'targety', 'transform', 'transform-origin', 'text-anchor', 'text-decoration', 'text-rendering', 'textlength', 'type', 'u1', 'u2', 'unicode', 'values', 'viewbox', 'visibility', 'version', 'vert-adv-y', 'vert-origin-x', 'vert-origin-y', 'width', 'word-spacing', 'wrap', 'writing-mode', 'xchannelselector', 'ychannelselector', 'x', 'x1', 'x2', 'xmlns', 'y', 'y1', 'y2', 'z', 'zoomandpan']);
+const mathMl = freeze(['accent', 'accentunder', 'align', 'bevelled', 'close', 'columnsalign', 'columnlines', 'columnspan', 'denomalign', 'depth', 'dir', 'display', 'displaystyle', 'encoding', 'fence', 'frame', 'height', 'href', 'id', 'largeop', 'length', 'linethickness', 'lspace', 'lquote', 'mathbackground', 'mathcolor', 'mathsize', 'mathvariant', 'maxsize', 'minsize', 'movablelimits', 'notation', 'numalign', 'open', 'rowalign', 'rowlines', 'rowspacing', 'rowspan', 'rspace', 'rquote', 'scriptlevel', 'scriptminsize', 'scriptsizemultiplier', 'selection', 'separator', 'separators', 'stretchy', 'subscriptshift', 'supscriptshift', 'symmetric', 'voffset', 'width', 'xmlns']);
+const xml = freeze(['xlink:href', 'xml:id', 'xlink:title', 'xml:space', 'xmlns:xlink']);
+
+const MUSTACHE_EXPR = seal(/\{\{[\w\W]*|[\w\W]*\}\}/gm); // Specify template detection regex for SAFE_FOR_TEMPLATES mode
+
+const ERB_EXPR = seal(/<%[\w\W]*|[\w\W]*%>/gm);
+const TMPLIT_EXPR = seal(/\${[\w\W]*}/gm);
+const DATA_ATTR = seal(/^data-[\-\w.\u00B7-\uFFFF]/); // eslint-disable-line no-useless-escape
+
+const ARIA_ATTR = seal(/^aria-[\-\w]+$/); // eslint-disable-line no-useless-escape
+
+const IS_ALLOWED_URI = seal(/^(?:(?:(?:f|ht)tps?|mailto|tel|callto|sms|cid|xmpp):|[^a-z]|[a-z+.\-]+(?:[^a-z+.\-:]|$))/i // eslint-disable-line no-useless-escape
+);
+const IS_SCRIPT_OR_DATA = seal(/^(?:\w+script|data):/i);
+const ATTR_WHITESPACE = seal(/[\u0000-\u0020\u00A0\u1680\u180E\u2000-\u2029\u205F\u3000]/g // eslint-disable-line no-control-regex
+);
+const DOCTYPE_NAME = seal(/^html$/i);
+
+var EXPRESSIONS = /*#__PURE__*/Object.freeze({
+  __proto__: null,
+  MUSTACHE_EXPR: MUSTACHE_EXPR,
+  ERB_EXPR: ERB_EXPR,
+  TMPLIT_EXPR: TMPLIT_EXPR,
+  DATA_ATTR: DATA_ATTR,
+  ARIA_ATTR: ARIA_ATTR,
+  IS_ALLOWED_URI: IS_ALLOWED_URI,
+  IS_SCRIPT_OR_DATA: IS_SCRIPT_OR_DATA,
+  ATTR_WHITESPACE: ATTR_WHITESPACE,
+  DOCTYPE_NAME: DOCTYPE_NAME
+});
+
+const getGlobal = () => typeof window === 'undefined' ? null : window;
+/**
+ * Creates a no-op policy for internal use only.
+ * Don't export this function outside this module!
+ * @param {?TrustedTypePolicyFactory} trustedTypes The policy factory.
+ * @param {Document} document The document object (to determine policy name suffix)
+ * @return {?TrustedTypePolicy} The policy created (or null, if Trusted Types
+ * are not supported).
+ */
+
+
+const _createTrustedTypesPolicy = function _createTrustedTypesPolicy(trustedTypes, document) {
+  if (typeof trustedTypes !== 'object' || typeof trustedTypes.createPolicy !== 'function') {
+    return null;
+  } // Allow the callers to control the unique policy name
+  // by adding a data-tt-policy-suffix to the script element with the DOMPurify.
+  // Policy creation with duplicate names throws in Trusted Types.
+
+
+  let suffix = null;
+  const ATTR_NAME = 'data-tt-policy-suffix';
+
+  if (document.currentScript && document.currentScript.hasAttribute(ATTR_NAME)) {
+    suffix = document.currentScript.getAttribute(ATTR_NAME);
+  }
+
+  const policyName = 'dompurify' + (suffix ? '#' + suffix : '');
+
+  try {
+    return trustedTypes.createPolicy(policyName, {
+      createHTML(html) {
+        return html;
+      },
+
+      createScriptURL(scriptUrl) {
+        return scriptUrl;
+      }
+
+    });
+  } catch (_) {
+    // Policy creation failed (most likely another DOMPurify script has
+    // already run). Skip creating the policy, as this will only cause errors
+    // if TT are enforced.
+    console.warn('TrustedTypes policy ' + policyName + ' could not be created.');
+    return null;
+  }
+};
+
+function createDOMPurify() {
+  let window = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : getGlobal();
+
+  const DOMPurify = root => createDOMPurify(root);
+  /**
+   * Version label, exposed for easier checks
+   * if DOMPurify is up to date or not
+   */
+
+
+  DOMPurify.version = '3.0.2';
+  /**
+   * Array of elements that DOMPurify removed during sanitation.
+   * Empty if nothing was removed.
+   */
+
+  DOMPurify.removed = [];
+
+  if (!window || !window.document || window.document.nodeType !== 9) {
+    // Not running in a browser, provide a factory function
+    // so that you can pass your own Window
+    DOMPurify.isSupported = false;
+    return DOMPurify;
+  }
+
+  const originalDocument = window.document;
+  let {
+    document
+  } = window;
+  const {
+    DocumentFragment,
+    HTMLTemplateElement,
+    Node,
+    Element,
+    NodeFilter,
+    NamedNodeMap = window.NamedNodeMap || window.MozNamedAttrMap,
+    HTMLFormElement,
+    DOMParser,
+    trustedTypes
+  } = window;
+  const ElementPrototype = Element.prototype;
+  const cloneNode = lookupGetter(ElementPrototype, 'cloneNode');
+  const getNextSibling = lookupGetter(ElementPrototype, 'nextSibling');
+  const getChildNodes = lookupGetter(ElementPrototype, 'childNodes');
+  const getParentNode = lookupGetter(ElementPrototype, 'parentNode'); // As per issue #47, the web-components registry is inherited by a
+  // new document created via createHTMLDocument. As per the spec
+  // (http://w3c.github.io/webcomponents/spec/custom/#creating-and-passing-registries)
+  // a new empty registry is used when creating a template contents owner
+  // document, so we use that as our parent document to ensure nothing
+  // is inherited.
+
+  if (typeof HTMLTemplateElement === 'function') {
+    const template = document.createElement('template');
+
+    if (template.content && template.content.ownerDocument) {
+      document = template.content.ownerDocument;
+    }
+  }
+
+  const trustedTypesPolicy = _createTrustedTypesPolicy(trustedTypes, originalDocument);
+
+  const emptyHTML = trustedTypesPolicy ? trustedTypesPolicy.createHTML('') : '';
+  const {
+    implementation,
+    createNodeIterator,
+    createDocumentFragment,
+    getElementsByTagName
+  } = document;
+  const {
+    importNode
+  } = originalDocument;
+  let hooks = {};
+  /**
+   * Expose whether this browser supports running the full DOMPurify.
+   */
+
+  DOMPurify.isSupported = typeof entries === 'function' && typeof getParentNode === 'function' && implementation && typeof implementation.createHTMLDocument !== 'undefined';
+  const {
+    MUSTACHE_EXPR,
+    ERB_EXPR,
+    TMPLIT_EXPR,
+    DATA_ATTR,
+    ARIA_ATTR,
+    IS_SCRIPT_OR_DATA,
+    ATTR_WHITESPACE
+  } = EXPRESSIONS;
+  let {
+    IS_ALLOWED_URI: IS_ALLOWED_URI$1
+  } = EXPRESSIONS;
+  /**
+   * We consider the elements and attributes below to be safe. Ideally
+   * don't add any new ones but feel free to remove unwanted ones.
+   */
+
+  /* allowed element names */
+
+  let ALLOWED_TAGS = null;
+  const DEFAULT_ALLOWED_TAGS = addToSet({}, [...html$1, ...svg$1, ...svgFilters, ...mathMl$1, ...text]);
+  /* Allowed attribute names */
+
+  let ALLOWED_ATTR = null;
+  const DEFAULT_ALLOWED_ATTR = addToSet({}, [...html, ...svg, ...mathMl, ...xml]);
+  /*
+   * Configure how DOMPUrify should handle custom elements and their attributes as well as customized built-in elements.
+   * @property {RegExp|Function|null} tagNameCheck one of [null, regexPattern, predicate]. Default: `null` (disallow any custom elements)
+   * @property {RegExp|Function|null} attributeNameCheck one of [null, regexPattern, predicate]. Default: `null` (disallow any attributes not on the allow list)
+   * @property {boolean} allowCustomizedBuiltInElements allow custom elements derived from built-ins if they pass CUSTOM_ELEMENT_HANDLING.tagNameCheck. Default: `false`.
+   */
+
+  let CUSTOM_ELEMENT_HANDLING = Object.seal(Object.create(null, {
+    tagNameCheck: {
+      writable: true,
+      configurable: false,
+      enumerable: true,
+      value: null
+    },
+    attributeNameCheck: {
+      writable: true,
+      configurable: false,
+      enumerable: true,
+      value: null
+    },
+    allowCustomizedBuiltInElements: {
+      writable: true,
+      configurable: false,
+      enumerable: true,
+      value: false
+    }
+  }));
+  /* Explicitly forbidden tags (overrides ALLOWED_TAGS/ADD_TAGS) */
+
+  let FORBID_TAGS = null;
+  /* Explicitly forbidden attributes (overrides ALLOWED_ATTR/ADD_ATTR) */
+
+  let FORBID_ATTR = null;
+  /* Decide if ARIA attributes are okay */
+
+  let ALLOW_ARIA_ATTR = true;
+  /* Decide if custom data attributes are okay */
+
+  let ALLOW_DATA_ATTR = true;
+  /* Decide if unknown protocols are okay */
+
+  let ALLOW_UNKNOWN_PROTOCOLS = false;
+  /* Decide if self-closing tags in attributes are allowed.
+   * Usually removed due to a mXSS issue in jQuery 3.0 */
+
+  let ALLOW_SELF_CLOSE_IN_ATTR = true;
+  /* Output should be safe for common template engines.
+   * This means, DOMPurify removes data attributes, mustaches and ERB
+   */
+
+  let SAFE_FOR_TEMPLATES = false;
+  /* Decide if document with <html>... should be returned */
+
+  let WHOLE_DOCUMENT = false;
+  /* Track whether config is already set on this instance of DOMPurify. */
+
+  let SET_CONFIG = false;
+  /* Decide if all elements (e.g. style, script) must be children of
+   * document.body. By default, browsers might move them to document.head */
+
+  let FORCE_BODY = false;
+  /* Decide if a DOM `HTMLBodyElement` should be returned, instead of a html
+   * string (or a TrustedHTML object if Trusted Types are supported).
+   * If `WHOLE_DOCUMENT` is enabled a `HTMLHtmlElement` will be returned instead
+   */
+
+  let RETURN_DOM = false;
+  /* Decide if a DOM `DocumentFragment` should be returned, instead of a html
+   * string  (or a TrustedHTML object if Trusted Types are supported) */
+
+  let RETURN_DOM_FRAGMENT = false;
+  /* Try to return a Trusted Type object instead of a string, return a string in
+   * case Trusted Types are not supported  */
+
+  let RETURN_TRUSTED_TYPE = false;
+  /* Output should be free from DOM clobbering attacks?
+   * This sanitizes markups named with colliding, clobberable built-in DOM APIs.
+   */
+
+  let SANITIZE_DOM = true;
+  /* Achieve full DOM Clobbering protection by isolating the namespace of named
+   * properties and JS variables, mitigating attacks that abuse the HTML/DOM spec rules.
+   *
+   * HTML/DOM spec rules that enable DOM Clobbering:
+   *   - Named Access on Window (§7.3.3)
+   *   - DOM Tree Accessors (§3.1.5)
+   *   - Form Element Parent-Child Relations (§4.10.3)
+   *   - Iframe srcdoc / Nested WindowProxies (§4.8.5)
+   *   - HTMLCollection (§4.2.10.2)
+   *
+   * Namespace isolation is implemented by prefixing `id` and `name` attributes
+   * with a constant string, i.e., `user-content-`
+   */
+
+  let SANITIZE_NAMED_PROPS = false;
+  const SANITIZE_NAMED_PROPS_PREFIX = 'user-content-';
+  /* Keep element content when removing element? */
+
+  let KEEP_CONTENT = true;
+  /* If a `Node` is passed to sanitize(), then performs sanitization in-place instead
+   * of importing it into a new Document and returning a sanitized copy */
+
+  let IN_PLACE = false;
+  /* Allow usage of profiles like html, svg and mathMl */
+
+  let USE_PROFILES = {};
+  /* Tags to ignore content of when KEEP_CONTENT is true */
+
+  let FORBID_CONTENTS = null;
+  const DEFAULT_FORBID_CONTENTS = addToSet({}, ['annotation-xml', 'audio', 'colgroup', 'desc', 'foreignobject', 'head', 'iframe', 'math', 'mi', 'mn', 'mo', 'ms', 'mtext', 'noembed', 'noframes', 'noscript', 'plaintext', 'script', 'style', 'svg', 'template', 'thead', 'title', 'video', 'xmp']);
+  /* Tags that are safe for data: URIs */
+
+  let DATA_URI_TAGS = null;
+  const DEFAULT_DATA_URI_TAGS = addToSet({}, ['audio', 'video', 'img', 'source', 'image', 'track']);
+  /* Attributes safe for values like "javascript:" */
+
+  let URI_SAFE_ATTRIBUTES = null;
+  const DEFAULT_URI_SAFE_ATTRIBUTES = addToSet({}, ['alt', 'class', 'for', 'id', 'label', 'name', 'pattern', 'placeholder', 'role', 'summary', 'title', 'value', 'style', 'xmlns']);
+  const MATHML_NAMESPACE = 'http://www.w3.org/1998/Math/MathML';
+  const SVG_NAMESPACE = 'http://www.w3.org/2000/svg';
+  const HTML_NAMESPACE = 'http://www.w3.org/1999/xhtml';
+  /* Document namespace */
+
+  let NAMESPACE = HTML_NAMESPACE;
+  let IS_EMPTY_INPUT = false;
+  /* Allowed XHTML+XML namespaces */
+
+  let ALLOWED_NAMESPACES = null;
+  const DEFAULT_ALLOWED_NAMESPACES = addToSet({}, [MATHML_NAMESPACE, SVG_NAMESPACE, HTML_NAMESPACE], stringToString);
+  /* Parsing of strict XHTML documents */
+
+  let PARSER_MEDIA_TYPE;
+  const SUPPORTED_PARSER_MEDIA_TYPES = ['application/xhtml+xml', 'text/html'];
+  const DEFAULT_PARSER_MEDIA_TYPE = 'text/html';
+  let transformCaseFunc;
+  /* Keep a reference to config to pass to hooks */
+
+  let CONFIG = null;
+  /* Ideally, do not touch anything below this line */
+
+  /* ______________________________________________ */
+
+  const formElement = document.createElement('form');
+
+  const isRegexOrFunction = function isRegexOrFunction(testValue) {
+    return testValue instanceof RegExp || testValue instanceof Function;
+  };
+  /**
+   * _parseConfig
+   *
+   * @param  {Object} cfg optional config literal
+   */
+  // eslint-disable-next-line complexity
+
+
+  const _parseConfig = function _parseConfig(cfg) {
+    if (CONFIG && CONFIG === cfg) {
+      return;
+    }
+    /* Shield configuration object from tampering */
+
+
+    if (!cfg || typeof cfg !== 'object') {
+      cfg = {};
+    }
+    /* Shield configuration object from prototype pollution */
+
+
+    cfg = clone(cfg);
+    PARSER_MEDIA_TYPE = // eslint-disable-next-line unicorn/prefer-includes
+    SUPPORTED_PARSER_MEDIA_TYPES.indexOf(cfg.PARSER_MEDIA_TYPE) === -1 ? PARSER_MEDIA_TYPE = DEFAULT_PARSER_MEDIA_TYPE : PARSER_MEDIA_TYPE = cfg.PARSER_MEDIA_TYPE; // HTML tags and attributes are not case-sensitive, converting to lowercase. Keeping XHTML as is.
+
+    transformCaseFunc = PARSER_MEDIA_TYPE === 'application/xhtml+xml' ? stringToString : stringToLowerCase;
+    /* Set configuration parameters */
+
+    ALLOWED_TAGS = 'ALLOWED_TAGS' in cfg ? addToSet({}, cfg.ALLOWED_TAGS, transformCaseFunc) : DEFAULT_ALLOWED_TAGS;
+    ALLOWED_ATTR = 'ALLOWED_ATTR' in cfg ? addToSet({}, cfg.ALLOWED_ATTR, transformCaseFunc) : DEFAULT_ALLOWED_ATTR;
+    ALLOWED_NAMESPACES = 'ALLOWED_NAMESPACES' in cfg ? addToSet({}, cfg.ALLOWED_NAMESPACES, stringToString) : DEFAULT_ALLOWED_NAMESPACES;
+    URI_SAFE_ATTRIBUTES = 'ADD_URI_SAFE_ATTR' in cfg ? addToSet(clone(DEFAULT_URI_SAFE_ATTRIBUTES), // eslint-disable-line indent
+    cfg.ADD_URI_SAFE_ATTR, // eslint-disable-line indent
+    transformCaseFunc // eslint-disable-line indent
+    ) // eslint-disable-line indent
+    : DEFAULT_URI_SAFE_ATTRIBUTES;
+    DATA_URI_TAGS = 'ADD_DATA_URI_TAGS' in cfg ? addToSet(clone(DEFAULT_DATA_URI_TAGS), // eslint-disable-line indent
+    cfg.ADD_DATA_URI_TAGS, // eslint-disable-line indent
+    transformCaseFunc // eslint-disable-line indent
+    ) // eslint-disable-line indent
+    : DEFAULT_DATA_URI_TAGS;
+    FORBID_CONTENTS = 'FORBID_CONTENTS' in cfg ? addToSet({}, cfg.FORBID_CONTENTS, transformCaseFunc) : DEFAULT_FORBID_CONTENTS;
+    FORBID_TAGS = 'FORBID_TAGS' in cfg ? addToSet({}, cfg.FORBID_TAGS, transformCaseFunc) : {};
+    FORBID_ATTR = 'FORBID_ATTR' in cfg ? addToSet({}, cfg.FORBID_ATTR, transformCaseFunc) : {};
+    USE_PROFILES = 'USE_PROFILES' in cfg ? cfg.USE_PROFILES : false;
+    ALLOW_ARIA_ATTR = cfg.ALLOW_ARIA_ATTR !== false; // Default true
+
+    ALLOW_DATA_ATTR = cfg.ALLOW_DATA_ATTR !== false; // Default true
+
+    ALLOW_UNKNOWN_PROTOCOLS = cfg.ALLOW_UNKNOWN_PROTOCOLS || false; // Default false
+
+    ALLOW_SELF_CLOSE_IN_ATTR = cfg.ALLOW_SELF_CLOSE_IN_ATTR !== false; // Default true
+
+    SAFE_FOR_TEMPLATES = cfg.SAFE_FOR_TEMPLATES || false; // Default false
+
+    WHOLE_DOCUMENT = cfg.WHOLE_DOCUMENT || false; // Default false
+
+    RETURN_DOM = cfg.RETURN_DOM || false; // Default false
+
+    RETURN_DOM_FRAGMENT = cfg.RETURN_DOM_FRAGMENT || false; // Default false
+
+    RETURN_TRUSTED_TYPE = cfg.RETURN_TRUSTED_TYPE || false; // Default false
+
+    FORCE_BODY = cfg.FORCE_BODY || false; // Default false
+
+    SANITIZE_DOM = cfg.SANITIZE_DOM !== false; // Default true
+
+    SANITIZE_NAMED_PROPS = cfg.SANITIZE_NAMED_PROPS || false; // Default false
+
+    KEEP_CONTENT = cfg.KEEP_CONTENT !== false; // Default true
+
+    IN_PLACE = cfg.IN_PLACE || false; // Default false
+
+    IS_ALLOWED_URI$1 = cfg.ALLOWED_URI_REGEXP || IS_ALLOWED_URI;
+    NAMESPACE = cfg.NAMESPACE || HTML_NAMESPACE;
+    CUSTOM_ELEMENT_HANDLING = cfg.CUSTOM_ELEMENT_HANDLING || {};
+
+    if (cfg.CUSTOM_ELEMENT_HANDLING && isRegexOrFunction(cfg.CUSTOM_ELEMENT_HANDLING.tagNameCheck)) {
+      CUSTOM_ELEMENT_HANDLING.tagNameCheck = cfg.CUSTOM_ELEMENT_HANDLING.tagNameCheck;
+    }
+
+    if (cfg.CUSTOM_ELEMENT_HANDLING && isRegexOrFunction(cfg.CUSTOM_ELEMENT_HANDLING.attributeNameCheck)) {
+      CUSTOM_ELEMENT_HANDLING.attributeNameCheck = cfg.CUSTOM_ELEMENT_HANDLING.attributeNameCheck;
+    }
+
+    if (cfg.CUSTOM_ELEMENT_HANDLING && typeof cfg.CUSTOM_ELEMENT_HANDLING.allowCustomizedBuiltInElements === 'boolean') {
+      CUSTOM_ELEMENT_HANDLING.allowCustomizedBuiltInElements = cfg.CUSTOM_ELEMENT_HANDLING.allowCustomizedBuiltInElements;
+    }
+
+    if (SAFE_FOR_TEMPLATES) {
+      ALLOW_DATA_ATTR = false;
+    }
+
+    if (RETURN_DOM_FRAGMENT) {
+      RETURN_DOM = true;
+    }
+    /* Parse profile info */
+
+
+    if (USE_PROFILES) {
+      ALLOWED_TAGS = addToSet({}, [...text]);
+      ALLOWED_ATTR = [];
+
+      if (USE_PROFILES.html === true) {
+        addToSet(ALLOWED_TAGS, html$1);
+        addToSet(ALLOWED_ATTR, html);
+      }
+
+      if (USE_PROFILES.svg === true) {
+        addToSet(ALLOWED_TAGS, svg$1);
+        addToSet(ALLOWED_ATTR, svg);
+        addToSet(ALLOWED_ATTR, xml);
+      }
+
+      if (USE_PROFILES.svgFilters === true) {
+        addToSet(ALLOWED_TAGS, svgFilters);
+        addToSet(ALLOWED_ATTR, svg);
+        addToSet(ALLOWED_ATTR, xml);
+      }
+
+      if (USE_PROFILES.mathMl === true) {
+        addToSet(ALLOWED_TAGS, mathMl$1);
+        addToSet(ALLOWED_ATTR, mathMl);
+        addToSet(ALLOWED_ATTR, xml);
+      }
+    }
+    /* Merge configuration parameters */
+
+
+    if (cfg.ADD_TAGS) {
+      if (ALLOWED_TAGS === DEFAULT_ALLOWED_TAGS) {
+        ALLOWED_TAGS = clone(ALLOWED_TAGS);
+      }
+
+      addToSet(ALLOWED_TAGS, cfg.ADD_TAGS, transformCaseFunc);
+    }
+
+    if (cfg.ADD_ATTR) {
+      if (ALLOWED_ATTR === DEFAULT_ALLOWED_ATTR) {
+        ALLOWED_ATTR = clone(ALLOWED_ATTR);
+      }
+
+      addToSet(ALLOWED_ATTR, cfg.ADD_ATTR, transformCaseFunc);
+    }
+
+    if (cfg.ADD_URI_SAFE_ATTR) {
+      addToSet(URI_SAFE_ATTRIBUTES, cfg.ADD_URI_SAFE_ATTR, transformCaseFunc);
+    }
+
+    if (cfg.FORBID_CONTENTS) {
+      if (FORBID_CONTENTS === DEFAULT_FORBID_CONTENTS) {
+        FORBID_CONTENTS = clone(FORBID_CONTENTS);
+      }
+
+      addToSet(FORBID_CONTENTS, cfg.FORBID_CONTENTS, transformCaseFunc);
+    }
+    /* Add #text in case KEEP_CONTENT is set to true */
+
+
+    if (KEEP_CONTENT) {
+      ALLOWED_TAGS['#text'] = true;
+    }
+    /* Add html, head and body to ALLOWED_TAGS in case WHOLE_DOCUMENT is true */
+
+
+    if (WHOLE_DOCUMENT) {
+      addToSet(ALLOWED_TAGS, ['html', 'head', 'body']);
+    }
+    /* Add tbody to ALLOWED_TAGS in case tables are permitted, see #286, #365 */
+
+
+    if (ALLOWED_TAGS.table) {
+      addToSet(ALLOWED_TAGS, ['tbody']);
+      delete FORBID_TAGS.tbody;
+    } // Prevent further manipulation of configuration.
+    // Not available in IE8, Safari 5, etc.
+
+
+    if (freeze) {
+      freeze(cfg);
+    }
+
+    CONFIG = cfg;
+  };
+
+  const MATHML_TEXT_INTEGRATION_POINTS = addToSet({}, ['mi', 'mo', 'mn', 'ms', 'mtext']);
+  const HTML_INTEGRATION_POINTS = addToSet({}, ['foreignobject', 'desc', 'title', 'annotation-xml']); // Certain elements are allowed in both SVG and HTML
+  // namespace. We need to specify them explicitly
+  // so that they don't get erroneously deleted from
+  // HTML namespace.
+
+  const COMMON_SVG_AND_HTML_ELEMENTS = addToSet({}, ['title', 'style', 'font', 'a', 'script']);
+  /* Keep track of all possible SVG and MathML tags
+   * so that we can perform the namespace checks
+   * correctly. */
+
+  const ALL_SVG_TAGS = addToSet({}, svg$1);
+  addToSet(ALL_SVG_TAGS, svgFilters);
+  addToSet(ALL_SVG_TAGS, svgDisallowed);
+  const ALL_MATHML_TAGS = addToSet({}, mathMl$1);
+  addToSet(ALL_MATHML_TAGS, mathMlDisallowed);
+  /**
+   *
+   *
+   * @param  {Element} element a DOM element whose namespace is being checked
+   * @returns {boolean} Return false if the element has a
+   *  namespace that a spec-compliant parser would never
+   *  return. Return true otherwise.
+   */
+
+  const _checkValidNamespace = function _checkValidNamespace(element) {
+    let parent = getParentNode(element); // In JSDOM, if we're inside shadow DOM, then parentNode
+    // can be null. We just simulate parent in this case.
+
+    if (!parent || !parent.tagName) {
+      parent = {
+        namespaceURI: NAMESPACE,
+        tagName: 'template'
+      };
+    }
+
+    const tagName = stringToLowerCase(element.tagName);
+    const parentTagName = stringToLowerCase(parent.tagName);
+
+    if (!ALLOWED_NAMESPACES[element.namespaceURI]) {
+      return false;
+    }
+
+    if (element.namespaceURI === SVG_NAMESPACE) {
+      // The only way to switch from HTML namespace to SVG
+      // is via <svg>. If it happens via any other tag, then
+      // it should be killed.
+      if (parent.namespaceURI === HTML_NAMESPACE) {
+        return tagName === 'svg';
+      } // The only way to switch from MathML to SVG is via`
+      // svg if parent is either <annotation-xml> or MathML
+      // text integration points.
+
+
+      if (parent.namespaceURI === MATHML_NAMESPACE) {
+        return tagName === 'svg' && (parentTagName === 'annotation-xml' || MATHML_TEXT_INTEGRATION_POINTS[parentTagName]);
+      } // We only allow elements that are defined in SVG
+      // spec. All others are disallowed in SVG namespace.
+
+
+      return Boolean(ALL_SVG_TAGS[tagName]);
+    }
+
+    if (element.namespaceURI === MATHML_NAMESPACE) {
+      // The only way to switch from HTML namespace to MathML
+      // is via <math>. If it happens via any other tag, then
+      // it should be killed.
+      if (parent.namespaceURI === HTML_NAMESPACE) {
+        return tagName === 'math';
+      } // The only way to switch from SVG to MathML is via
+      // <math> and HTML integration points
+
+
+      if (parent.namespaceURI === SVG_NAMESPACE) {
+        return tagName === 'math' && HTML_INTEGRATION_POINTS[parentTagName];
+      } // We only allow elements that are defined in MathML
+      // spec. All others are disallowed in MathML namespace.
+
+
+      return Boolean(ALL_MATHML_TAGS[tagName]);
+    }
+
+    if (element.namespaceURI === HTML_NAMESPACE) {
+      // The only way to switch from SVG to HTML is via
+      // HTML integration points, and from MathML to HTML
+      // is via MathML text integration points
+      if (parent.namespaceURI === SVG_NAMESPACE && !HTML_INTEGRATION_POINTS[parentTagName]) {
+        return false;
+      }
+
+      if (parent.namespaceURI === MATHML_NAMESPACE && !MATHML_TEXT_INTEGRATION_POINTS[parentTagName]) {
+        return false;
+      } // We disallow tags that are specific for MathML
+      // or SVG and should never appear in HTML namespace
+
+
+      return !ALL_MATHML_TAGS[tagName] && (COMMON_SVG_AND_HTML_ELEMENTS[tagName] || !ALL_SVG_TAGS[tagName]);
+    } // For XHTML and XML documents that support custom namespaces
+
+
+    if (PARSER_MEDIA_TYPE === 'application/xhtml+xml' && ALLOWED_NAMESPACES[element.namespaceURI]) {
+      return true;
+    } // The code should never reach this place (this means
+    // that the element somehow got namespace that is not
+    // HTML, SVG, MathML or allowed via ALLOWED_NAMESPACES).
+    // Return false just in case.
+
+
+    return false;
+  };
+  /**
+   * _forceRemove
+   *
+   * @param  {Node} node a DOM node
+   */
+
+
+  const _forceRemove = function _forceRemove(node) {
+    arrayPush(DOMPurify.removed, {
+      element: node
+    });
+
+    try {
+      // eslint-disable-next-line unicorn/prefer-dom-node-remove
+      node.parentNode.removeChild(node);
+    } catch (_) {
+      node.remove();
+    }
+  };
+  /**
+   * _removeAttribute
+   *
+   * @param  {String} name an Attribute name
+   * @param  {Node} node a DOM node
+   */
+
+
+  const _removeAttribute = function _removeAttribute(name, node) {
+    try {
+      arrayPush(DOMPurify.removed, {
+        attribute: node.getAttributeNode(name),
+        from: node
+      });
+    } catch (_) {
+      arrayPush(DOMPurify.removed, {
+        attribute: null,
+        from: node
+      });
+    }
+
+    node.removeAttribute(name); // We void attribute values for unremovable "is"" attributes
+
+    if (name === 'is' && !ALLOWED_ATTR[name]) {
+      if (RETURN_DOM || RETURN_DOM_FRAGMENT) {
+        try {
+          _forceRemove(node);
+        } catch (_) {}
+      } else {
+        try {
+          node.setAttribute(name, '');
+        } catch (_) {}
+      }
+    }
+  };
+  /**
+   * _initDocument
+   *
+   * @param  {String} dirty a string of dirty markup
+   * @return {Document} a DOM, filled with the dirty markup
+   */
+
+
+  const _initDocument = function _initDocument(dirty) {
+    /* Create a HTML document */
+    let doc;
+    let leadingWhitespace;
+
+    if (FORCE_BODY) {
+      dirty = '<remove></remove>' + dirty;
+    } else {
+      /* If FORCE_BODY isn't used, leading whitespace needs to be preserved manually */
+      const matches = stringMatch(dirty, /^[\r\n\t ]+/);
+      leadingWhitespace = matches && matches[0];
+    }
+
+    if (PARSER_MEDIA_TYPE === 'application/xhtml+xml' && NAMESPACE === HTML_NAMESPACE) {
+      // Root of XHTML doc must contain xmlns declaration (see https://www.w3.org/TR/xhtml1/normative.html#strict)
+      dirty = '<html xmlns="http://www.w3.org/1999/xhtml"><head></head><body>' + dirty + '</body></html>';
+    }
+
+    const dirtyPayload = trustedTypesPolicy ? trustedTypesPolicy.createHTML(dirty) : dirty;
+    /*
+     * Use the DOMParser API by default, fallback later if needs be
+     * DOMParser not work for svg when has multiple root element.
+     */
+
+    if (NAMESPACE === HTML_NAMESPACE) {
+      try {
+        doc = new DOMParser().parseFromString(dirtyPayload, PARSER_MEDIA_TYPE);
+      } catch (_) {}
+    }
+    /* Use createHTMLDocument in case DOMParser is not available */
+
+
+    if (!doc || !doc.documentElement) {
+      doc = implementation.createDocument(NAMESPACE, 'template', null);
+
+      try {
+        doc.documentElement.innerHTML = IS_EMPTY_INPUT ? emptyHTML : dirtyPayload;
+      } catch (_) {// Syntax error if dirtyPayload is invalid xml
+      }
+    }
+
+    const body = doc.body || doc.documentElement;
+
+    if (dirty && leadingWhitespace) {
+      body.insertBefore(document.createTextNode(leadingWhitespace), body.childNodes[0] || null);
+    }
+    /* Work on whole document or just its body */
+
+
+    if (NAMESPACE === HTML_NAMESPACE) {
+      return getElementsByTagName.call(doc, WHOLE_DOCUMENT ? 'html' : 'body')[0];
+    }
+
+    return WHOLE_DOCUMENT ? doc.documentElement : body;
+  };
+  /**
+   * _createIterator
+   *
+   * @param  {Document} root document/fragment to create iterator for
+   * @return {Iterator} iterator instance
+   */
+
+
+  const _createIterator = function _createIterator(root) {
+    return createNodeIterator.call(root.ownerDocument || root, root, // eslint-disable-next-line no-bitwise
+    NodeFilter.SHOW_ELEMENT | NodeFilter.SHOW_COMMENT | NodeFilter.SHOW_TEXT, null, false);
+  };
+  /**
+   * _isClobbered
+   *
+   * @param  {Node} elm element to check for clobbering attacks
+   * @return {Boolean} true if clobbered, false if safe
+   */
+
+
+  const _isClobbered = function _isClobbered(elm) {
+    return elm instanceof HTMLFormElement && (typeof elm.nodeName !== 'string' || typeof elm.textContent !== 'string' || typeof elm.removeChild !== 'function' || !(elm.attributes instanceof NamedNodeMap) || typeof elm.removeAttribute !== 'function' || typeof elm.setAttribute !== 'function' || typeof elm.namespaceURI !== 'string' || typeof elm.insertBefore !== 'function' || typeof elm.hasChildNodes !== 'function');
+  };
+  /**
+   * _isNode
+   *
+   * @param  {Node} obj object to check whether it's a DOM node
+   * @return {Boolean} true is object is a DOM node
+   */
+
+
+  const _isNode = function _isNode(object) {
+    return typeof Node === 'object' ? object instanceof Node : object && typeof object === 'object' && typeof object.nodeType === 'number' && typeof object.nodeName === 'string';
+  };
+  /**
+   * _executeHook
+   * Execute user configurable hooks
+   *
+   * @param  {String} entryPoint  Name of the hook's entry point
+   * @param  {Node} currentNode node to work on with the hook
+   * @param  {Object} data additional hook parameters
+   */
+
+
+  const _executeHook = function _executeHook(entryPoint, currentNode, data) {
+    if (!hooks[entryPoint]) {
+      return;
+    }
+
+    arrayForEach(hooks[entryPoint], hook => {
+      hook.call(DOMPurify, currentNode, data, CONFIG);
+    });
+  };
+  /**
+   * _sanitizeElements
+   *
+   * @protect nodeName
+   * @protect textContent
+   * @protect removeChild
+   *
+   * @param   {Node} currentNode to check for permission to exist
+   * @return  {Boolean} true if node was killed, false if left alive
+   */
+
+
+  const _sanitizeElements = function _sanitizeElements(currentNode) {
+    let content;
+    /* Execute a hook if present */
+
+    _executeHook('beforeSanitizeElements', currentNode, null);
+    /* Check if element is clobbered or can clobber */
+
+
+    if (_isClobbered(currentNode)) {
+      _forceRemove(currentNode);
+
+      return true;
+    }
+    /* Now let's check the element's type and name */
+
+
+    const tagName = transformCaseFunc(currentNode.nodeName);
+    /* Execute a hook if present */
+
+    _executeHook('uponSanitizeElement', currentNode, {
+      tagName,
+      allowedTags: ALLOWED_TAGS
+    });
+    /* Detect mXSS attempts abusing namespace confusion */
+
+
+    if (currentNode.hasChildNodes() && !_isNode(currentNode.firstElementChild) && (!_isNode(currentNode.content) || !_isNode(currentNode.content.firstElementChild)) && regExpTest(/<[/\w]/g, currentNode.innerHTML) && regExpTest(/<[/\w]/g, currentNode.textContent)) {
+      _forceRemove(currentNode);
+
+      return true;
+    }
+    /* Remove element if anything forbids its presence */
+
+
+    if (!ALLOWED_TAGS[tagName] || FORBID_TAGS[tagName]) {
+      /* Check if we have a custom element to handle */
+      if (!FORBID_TAGS[tagName] && _basicCustomElementTest(tagName)) {
+        if (CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof RegExp && regExpTest(CUSTOM_ELEMENT_HANDLING.tagNameCheck, tagName)) return false;
+        if (CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof Function && CUSTOM_ELEMENT_HANDLING.tagNameCheck(tagName)) return false;
+      }
+      /* Keep content except for bad-listed elements */
+
+
+      if (KEEP_CONTENT && !FORBID_CONTENTS[tagName]) {
+        const parentNode = getParentNode(currentNode) || currentNode.parentNode;
+        const childNodes = getChildNodes(currentNode) || currentNode.childNodes;
+
+        if (childNodes && parentNode) {
+          const childCount = childNodes.length;
+
+          for (let i = childCount - 1; i >= 0; --i) {
+            parentNode.insertBefore(cloneNode(childNodes[i], true), getNextSibling(currentNode));
+          }
+        }
+      }
+
+      _forceRemove(currentNode);
+
+      return true;
+    }
+    /* Check whether element has a valid namespace */
+
+
+    if (currentNode instanceof Element && !_checkValidNamespace(currentNode)) {
+      _forceRemove(currentNode);
+
+      return true;
+    }
+    /* Make sure that older browsers don't get noscript mXSS */
+
+
+    if ((tagName === 'noscript' || tagName === 'noembed') && regExpTest(/<\/no(script|embed)/i, currentNode.innerHTML)) {
+      _forceRemove(currentNode);
+
+      return true;
+    }
+    /* Sanitize element content to be template-safe */
+
+
+    if (SAFE_FOR_TEMPLATES && currentNode.nodeType === 3) {
+      /* Get the element's text content */
+      content = currentNode.textContent;
+      content = stringReplace(content, MUSTACHE_EXPR, ' ');
+      content = stringReplace(content, ERB_EXPR, ' ');
+      content = stringReplace(content, TMPLIT_EXPR, ' ');
+
+      if (currentNode.textContent !== content) {
+        arrayPush(DOMPurify.removed, {
+          element: currentNode.cloneNode()
+        });
+        currentNode.textContent = content;
+      }
+    }
+    /* Execute a hook if present */
+
+
+    _executeHook('afterSanitizeElements', currentNode, null);
+
+    return false;
+  };
+  /**
+   * _isValidAttribute
+   *
+   * @param  {string} lcTag Lowercase tag name of containing element.
+   * @param  {string} lcName Lowercase attribute name.
+   * @param  {string} value Attribute value.
+   * @return {Boolean} Returns true if `value` is valid, otherwise false.
+   */
+  // eslint-disable-next-line complexity
+
+
+  const _isValidAttribute = function _isValidAttribute(lcTag, lcName, value) {
+    /* Make sure attribute cannot clobber */
+    if (SANITIZE_DOM && (lcName === 'id' || lcName === 'name') && (value in document || value in formElement)) {
+      return false;
+    }
+    /* Allow valid data-* attributes: At least one character after "-"
+        (https://html.spec.whatwg.org/multipage/dom.html#embedding-custom-non-visible-data-with-the-data-*-attributes)
+        XML-compatible (https://html.spec.whatwg.org/multipage/infrastructure.html#xml-compatible and http://www.w3.org/TR/xml/#d0e804)
+        We don't need to check the value; it's always URI safe. */
+
+
+    if (ALLOW_DATA_ATTR && !FORBID_ATTR[lcName] && regExpTest(DATA_ATTR, lcName)) ; else if (ALLOW_ARIA_ATTR && regExpTest(ARIA_ATTR, lcName)) ; else if (!ALLOWED_ATTR[lcName] || FORBID_ATTR[lcName]) {
+      if ( // First condition does a very basic check if a) it's basically a valid custom element tagname AND
+      // b) if the tagName passes whatever the user has configured for CUSTOM_ELEMENT_HANDLING.tagNameCheck
+      // and c) if the attribute name passes whatever the user has configured for CUSTOM_ELEMENT_HANDLING.attributeNameCheck
+      _basicCustomElementTest(lcTag) && (CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof RegExp && regExpTest(CUSTOM_ELEMENT_HANDLING.tagNameCheck, lcTag) || CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof Function && CUSTOM_ELEMENT_HANDLING.tagNameCheck(lcTag)) && (CUSTOM_ELEMENT_HANDLING.attributeNameCheck instanceof RegExp && regExpTest(CUSTOM_ELEMENT_HANDLING.attributeNameCheck, lcName) || CUSTOM_ELEMENT_HANDLING.attributeNameCheck instanceof Function && CUSTOM_ELEMENT_HANDLING.attributeNameCheck(lcName)) || // Alternative, second condition checks if it's an `is`-attribute, AND
+      // the value passes whatever the user has configured for CUSTOM_ELEMENT_HANDLING.tagNameCheck
+      lcName === 'is' && CUSTOM_ELEMENT_HANDLING.allowCustomizedBuiltInElements && (CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof RegExp && regExpTest(CUSTOM_ELEMENT_HANDLING.tagNameCheck, value) || CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof Function && CUSTOM_ELEMENT_HANDLING.tagNameCheck(value))) ; else {
+        return false;
+      }
+      /* Check value is safe. First, is attr inert? If so, is safe */
+
+    } else if (URI_SAFE_ATTRIBUTES[lcName]) ; else if (regExpTest(IS_ALLOWED_URI$1, stringReplace(value, ATTR_WHITESPACE, ''))) ; else if ((lcName === 'src' || lcName === 'xlink:href' || lcName === 'href') && lcTag !== 'script' && stringIndexOf(value, 'data:') === 0 && DATA_URI_TAGS[lcTag]) ; else if (ALLOW_UNKNOWN_PROTOCOLS && !regExpTest(IS_SCRIPT_OR_DATA, stringReplace(value, ATTR_WHITESPACE, ''))) ; else if (!value) ; else {
+      return false;
+    }
+
+    return true;
+  };
+  /**
+   * _basicCustomElementCheck
+   * checks if at least one dash is included in tagName, and it's not the first char
+   * for more sophisticated checking see https://github.com/sindresorhus/validate-element-name
+   * @param {string} tagName name of the tag of the node to sanitize
+   */
+
+
+  const _basicCustomElementTest = function _basicCustomElementTest(tagName) {
+    return tagName.indexOf('-') > 0;
+  };
+  /**
+   * _sanitizeAttributes
+   *
+   * @protect attributes
+   * @protect nodeName
+   * @protect removeAttribute
+   * @protect setAttribute
+   *
+   * @param  {Node} currentNode to sanitize
+   */
+
+
+  const _sanitizeAttributes = function _sanitizeAttributes(currentNode) {
+    let attr;
+    let value;
+    let lcName;
+    let l;
+    /* Execute a hook if present */
+
+    _executeHook('beforeSanitizeAttributes', currentNode, null);
+
+    const {
+      attributes
+    } = currentNode;
+    /* Check if we have attributes; if not we might have a text node */
+
+    if (!attributes) {
+      return;
+    }
+
+    const hookEvent = {
+      attrName: '',
+      attrValue: '',
+      keepAttr: true,
+      allowedAttributes: ALLOWED_ATTR
+    };
+    l = attributes.length;
+    /* Go backwards over all attributes; safely remove bad ones */
+
+    while (l--) {
+      attr = attributes[l];
+      const {
+        name,
+        namespaceURI
+      } = attr;
+      value = name === 'value' ? attr.value : stringTrim(attr.value);
+      lcName = transformCaseFunc(name);
+      /* Execute a hook if present */
+
+      hookEvent.attrName = lcName;
+      hookEvent.attrValue = value;
+      hookEvent.keepAttr = true;
+      hookEvent.forceKeepAttr = undefined; // Allows developers to see this is a property they can set
+
+      _executeHook('uponSanitizeAttribute', currentNode, hookEvent);
+
+      value = hookEvent.attrValue;
+      /* Did the hooks approve of the attribute? */
+
+      if (hookEvent.forceKeepAttr) {
+        continue;
+      }
+      /* Remove attribute */
+
+
+      _removeAttribute(name, currentNode);
+      /* Did the hooks approve of the attribute? */
+
+
+      if (!hookEvent.keepAttr) {
+        continue;
+      }
+      /* Work around a security issue in jQuery 3.0 */
+
+
+      if (!ALLOW_SELF_CLOSE_IN_ATTR && regExpTest(/\/>/i, value)) {
+        _removeAttribute(name, currentNode);
+
+        continue;
+      }
+      /* Sanitize attribute content to be template-safe */
+
+
+      if (SAFE_FOR_TEMPLATES) {
+        value = stringReplace(value, MUSTACHE_EXPR, ' ');
+        value = stringReplace(value, ERB_EXPR, ' ');
+        value = stringReplace(value, TMPLIT_EXPR, ' ');
+      }
+      /* Is `value` valid for this attribute? */
+
+
+      const lcTag = transformCaseFunc(currentNode.nodeName);
+
+      if (!_isValidAttribute(lcTag, lcName, value)) {
+        continue;
+      }
+      /* Full DOM Clobbering protection via namespace isolation,
+       * Prefix id and name attributes with `user-content-`
+       */
+
+
+      if (SANITIZE_NAMED_PROPS && (lcName === 'id' || lcName === 'name')) {
+        // Remove the attribute with this value
+        _removeAttribute(name, currentNode); // Prefix the value and later re-create the attribute with the sanitized value
+
+
+        value = SANITIZE_NAMED_PROPS_PREFIX + value;
+      }
+      /* Handle attributes that require Trusted Types */
+
+
+      if (trustedTypesPolicy && typeof trustedTypes === 'object' && typeof trustedTypes.getAttributeType === 'function') {
+        if (namespaceURI) ; else {
+          switch (trustedTypes.getAttributeType(lcTag, lcName)) {
+            case 'TrustedHTML':
+              value = trustedTypesPolicy.createHTML(value);
+              break;
+
+            case 'TrustedScriptURL':
+              value = trustedTypesPolicy.createScriptURL(value);
+              break;
+          }
+        }
+      }
+      /* Handle invalid data-* attribute set by try-catching it */
+
+
+      try {
+        if (namespaceURI) {
+          currentNode.setAttributeNS(namespaceURI, name, value);
+        } else {
+          /* Fallback to setAttribute() for browser-unrecognized namespaces e.g. "x-schema". */
+          currentNode.setAttribute(name, value);
+        }
+
+        arrayPop(DOMPurify.removed);
+      } catch (_) {}
+    }
+    /* Execute a hook if present */
+
+
+    _executeHook('afterSanitizeAttributes', currentNode, null);
+  };
+  /**
+   * _sanitizeShadowDOM
+   *
+   * @param  {DocumentFragment} fragment to iterate over recursively
+   */
+
+
+  const _sanitizeShadowDOM = function _sanitizeShadowDOM(fragment) {
+    let shadowNode;
+
+    const shadowIterator = _createIterator(fragment);
+    /* Execute a hook if present */
+
+
+    _executeHook('beforeSanitizeShadowDOM', fragment, null);
+
+    while (shadowNode = shadowIterator.nextNode()) {
+      /* Execute a hook if present */
+      _executeHook('uponSanitizeShadowNode', shadowNode, null);
+      /* Sanitize tags and elements */
+
+
+      if (_sanitizeElements(shadowNode)) {
+        continue;
+      }
+      /* Deep shadow DOM detected */
+
+
+      if (shadowNode.content instanceof DocumentFragment) {
+        _sanitizeShadowDOM(shadowNode.content);
+      }
+      /* Check attributes, sanitize if necessary */
+
+
+      _sanitizeAttributes(shadowNode);
+    }
+    /* Execute a hook if present */
+
+
+    _executeHook('afterSanitizeShadowDOM', fragment, null);
+  };
+  /**
+   * Sanitize
+   * Public method providing core sanitation functionality
+   *
+   * @param {String|Node} dirty string or DOM node
+   * @param {Object} configuration object
+   */
+  // eslint-disable-next-line complexity
+
+
+  DOMPurify.sanitize = function (dirty) {
+    let cfg = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
+    let body;
+    let importedNode;
+    let currentNode;
+    let returnNode;
+    /* Make sure we have a string to sanitize.
+      DO NOT return early, as this will return the wrong type if
+      the user has requested a DOM object rather than a string */
+
+    IS_EMPTY_INPUT = !dirty;
+
+    if (IS_EMPTY_INPUT) {
+      dirty = '<!-->';
+    }
+    /* Stringify, in case dirty is an object */
+
+
+    if (typeof dirty !== 'string' && !_isNode(dirty)) {
+      // eslint-disable-next-line no-negated-condition
+      if (typeof dirty.toString !== 'function') {
+        throw typeErrorCreate('toString is not a function');
+      } else {
+        dirty = dirty.toString();
+
+        if (typeof dirty !== 'string') {
+          throw typeErrorCreate('dirty is not a string, aborting');
+        }
+      }
+    }
+    /* Return dirty HTML if DOMPurify cannot run */
+
+
+    if (!DOMPurify.isSupported) {
+      return dirty;
+    }
+    /* Assign config vars */
+
+
+    if (!SET_CONFIG) {
+      _parseConfig(cfg);
+    }
+    /* Clean up removed elements */
+
+
+    DOMPurify.removed = [];
+    /* Check if dirty is correctly typed for IN_PLACE */
+
+    if (typeof dirty === 'string') {
+      IN_PLACE = false;
+    }
+
+    if (IN_PLACE) {
+      /* Do some early pre-sanitization to avoid unsafe root nodes */
+      if (dirty.nodeName) {
+        const tagName = transformCaseFunc(dirty.nodeName);
+
+        if (!ALLOWED_TAGS[tagName] || FORBID_TAGS[tagName]) {
+          throw typeErrorCreate('root node is forbidden and cannot be sanitized in-place');
+        }
+      }
+    } else if (dirty instanceof Node) {
+      /* If dirty is a DOM element, append to an empty document to avoid
+         elements being stripped by the parser */
+      body = _initDocument('<!---->');
+      importedNode = body.ownerDocument.importNode(dirty, true);
+
+      if (importedNode.nodeType === 1 && importedNode.nodeName === 'BODY') {
+        /* Node is already a body, use as is */
+        body = importedNode;
+      } else if (importedNode.nodeName === 'HTML') {
+        body = importedNode;
+      } else {
+        // eslint-disable-next-line unicorn/prefer-dom-node-append
+        body.appendChild(importedNode);
+      }
+    } else {
+      /* Exit directly if we have nothing to do */
+      if (!RETURN_DOM && !SAFE_FOR_TEMPLATES && !WHOLE_DOCUMENT && // eslint-disable-next-line unicorn/prefer-includes
+      dirty.indexOf('<') === -1) {
+        return trustedTypesPolicy && RETURN_TRUSTED_TYPE ? trustedTypesPolicy.createHTML(dirty) : dirty;
+      }
+      /* Initialize the document to work on */
+
+
+      body = _initDocument(dirty);
+      /* Check we have a DOM node from the data */
+
+      if (!body) {
+        return RETURN_DOM ? null : RETURN_TRUSTED_TYPE ? emptyHTML : '';
+      }
+    }
+    /* Remove first element node (ours) if FORCE_BODY is set */
+
+
+    if (body && FORCE_BODY) {
+      _forceRemove(body.firstChild);
+    }
+    /* Get node iterator */
+
+
+    const nodeIterator = _createIterator(IN_PLACE ? dirty : body);
+    /* Now start iterating over the created document */
+
+
+    while (currentNode = nodeIterator.nextNode()) {
+      /* Sanitize tags and elements */
+      if (_sanitizeElements(currentNode)) {
+        continue;
+      }
+      /* Shadow DOM detected, sanitize it */
+
+
+      if (currentNode.content instanceof DocumentFragment) {
+        _sanitizeShadowDOM(currentNode.content);
+      }
+      /* Check attributes, sanitize if necessary */
+
+
+      _sanitizeAttributes(currentNode);
+    }
+    /* If we sanitized `dirty` in-place, return it. */
+
+
+    if (IN_PLACE) {
+      return dirty;
+    }
+    /* Return sanitized string or DOM */
+
+
+    if (RETURN_DOM) {
+      if (RETURN_DOM_FRAGMENT) {
+        returnNode = createDocumentFragment.call(body.ownerDocument);
+
+        while (body.firstChild) {
+          // eslint-disable-next-line unicorn/prefer-dom-node-append
+          returnNode.appendChild(body.firstChild);
+        }
+      } else {
+        returnNode = body;
+      }
+
+      if (ALLOWED_ATTR.shadowroot || ALLOWED_ATTR.shadowrootmod) {
+        /*
+          AdoptNode() is not used because internal state is not reset
+          (e.g. the past names map of a HTMLFormElement), this is safe
+          in theory but we would rather not risk another attack vector.
+          The state that is cloned by importNode() is explicitly defined
+          by the specs.
+        */
+        returnNode = importNode.call(originalDocument, returnNode, true);
+      }
+
+      return returnNode;
+    }
+
+    let serializedHTML = WHOLE_DOCUMENT ? body.outerHTML : body.innerHTML;
+    /* Serialize doctype if allowed */
+
+    if (WHOLE_DOCUMENT && ALLOWED_TAGS['!doctype'] && body.ownerDocument && body.ownerDocument.doctype && body.ownerDocument.doctype.name && regExpTest(DOCTYPE_NAME, body.ownerDocument.doctype.name)) {
+      serializedHTML = '<!DOCTYPE ' + body.ownerDocument.doctype.name + '>\n' + serializedHTML;
+    }
+    /* Sanitize final string template-safe */
+
+
+    if (SAFE_FOR_TEMPLATES) {
+      serializedHTML = stringReplace(serializedHTML, MUSTACHE_EXPR, ' ');
+      serializedHTML = stringReplace(serializedHTML, ERB_EXPR, ' ');
+      serializedHTML = stringReplace(serializedHTML, TMPLIT_EXPR, ' ');
+    }
+
+    return trustedTypesPolicy && RETURN_TRUSTED_TYPE ? trustedTypesPolicy.createHTML(serializedHTML) : serializedHTML;
+  };
+  /**
+   * Public method to set the configuration once
+   * setConfig
+   *
+   * @param {Object} cfg configuration object
+   */
+
+
+  DOMPurify.setConfig = function (cfg) {
+    _parseConfig(cfg);
+
+    SET_CONFIG = true;
+  };
+  /**
+   * Public method to remove the configuration
+   * clearConfig
+   *
+   */
+
+
+  DOMPurify.clearConfig = function () {
+    CONFIG = null;
+    SET_CONFIG = false;
+  };
+  /**
+   * Public method to check if an attribute value is valid.
+   * Uses last set config, if any. Otherwise, uses config defaults.
+   * isValidAttribute
+   *
+   * @param  {string} tag Tag name of containing element.
+   * @param  {string} attr Attribute name.
+   * @param  {string} value Attribute value.
+   * @return {Boolean} Returns true if `value` is valid. Otherwise, returns false.
+   */
+
+
+  DOMPurify.isValidAttribute = function (tag, attr, value) {
+    /* Initialize shared config vars if necessary. */
+    if (!CONFIG) {
+      _parseConfig({});
+    }
+
+    const lcTag = transformCaseFunc(tag);
+    const lcName = transformCaseFunc(attr);
+    return _isValidAttribute(lcTag, lcName, value);
+  };
+  /**
+   * AddHook
+   * Public method to add DOMPurify hooks
+   *
+   * @param {String} entryPoint entry point for the hook to add
+   * @param {Function} hookFunction function to execute
+   */
+
+
+  DOMPurify.addHook = function (entryPoint, hookFunction) {
+    if (typeof hookFunction !== 'function') {
+      return;
+    }
+
+    hooks[entryPoint] = hooks[entryPoint] || [];
+    arrayPush(hooks[entryPoint], hookFunction);
+  };
+  /**
+   * RemoveHook
+   * Public method to remove a DOMPurify hook at a given entryPoint
+   * (pops it from the stack of hooks if more are present)
+   *
+   * @param {String} entryPoint entry point for the hook to remove
+   * @return {Function} removed(popped) hook
+   */
+
+
+  DOMPurify.removeHook = function (entryPoint) {
+    if (hooks[entryPoint]) {
+      return arrayPop(hooks[entryPoint]);
+    }
+  };
+  /**
+   * RemoveHooks
+   * Public method to remove all DOMPurify hooks at a given entryPoint
+   *
+   * @param  {String} entryPoint entry point for the hooks to remove
+   */
+
+
+  DOMPurify.removeHooks = function (entryPoint) {
+    if (hooks[entryPoint]) {
+      hooks[entryPoint] = [];
+    }
+  };
+  /**
+   * RemoveAllHooks
+   * Public method to remove all DOMPurify hooks
+   *
+   */
+
+
+  DOMPurify.removeAllHooks = function () {
+    hooks = {};
+  };
+
+  return DOMPurify;
+}
+
+var purify = createDOMPurify();
+
+export { purify as default };
+//# sourceMappingURL=purify.es.js.map

programming_language: JavaScript
filename: purify.es.js.map
change_type: ModificationType.ADD
diff: @@ -0,0 +1 @@
+{"version":3,"file":"purify.es.js","sources":["../src/utils.js","../src/tags.js","../src/attrs.js","../src/regexp.js","../src/purify.js"],"sourcesContent":["const {\n  entries,\n  setPrototypeOf,\n  isFrozen,\n  getPrototypeOf,\n  getOwnPropertyDescriptor,\n} = Object;\n\nlet { freeze, seal, create } = Object; // eslint-disable-line import/no-mutable-exports\nlet { apply, construct } = typeof Reflect !== 'undefined' && Reflect;\n\nif (!apply) {\n  apply = function (fun, thisValue, args) {\n    return fun.apply(thisValue, args);\n  };\n}\n\nif (!freeze) {\n  freeze = function (x) {\n    return x;\n  };\n}\n\nif (!seal) {\n  seal = function (x) {\n    return x;\n  };\n}\n\nif (!construct) {\n  construct = function (Func, args) {\n    return new Func(...args);\n  };\n}\n\nconst arrayForEach = unapply(Array.prototype.forEach);\nconst arrayIndexOf = unapply(Array.prototype.indexOf);\nconst arrayPop = unapply(Array.prototype.pop);\nconst arrayPush = unapply(Array.prototype.push);\nconst arraySlice = unapply(Array.prototype.slice);\n\nconst stringToLowerCase = unapply(String.prototype.toLowerCase);\nconst stringToString = unapply(String.prototype.toString);\nconst stringMatch = unapply(String.prototype.match);\nconst stringReplace = unapply(String.prototype.replace);\nconst stringIndexOf = unapply(String.prototype.indexOf);\nconst stringTrim = unapply(String.prototype.trim);\n\nconst regExpTest = unapply(RegExp.prototype.test);\n\nconst typeErrorCreate = unconstruct(TypeError);\n\nexport function unapply(func) {\n  return (thisArg, ...args) => apply(func, thisArg, args);\n}\n\nexport function unconstruct(func) {\n  return (...args) => construct(func, args);\n}\n\n/* Add properties to a lookup table */\nexport function addToSet(set, array, transformCaseFunc) {\n  transformCaseFunc = transformCaseFunc ? transformCaseFunc : stringToLowerCase;\n  if (setPrototypeOf) {\n    // Make 'in' and truthy checks like Boolean(set.constructor)\n    // independent of any properties defined on Object.prototype.\n    // Prevent prototype setters from intercepting set as a this value.\n    setPrototypeOf(set, null);\n  }\n\n  let l = array.length;\n  while (l--) {\n    let element = array[l];\n    if (typeof element === 'string') {\n      const lcElement = transformCaseFunc(element);\n      if (lcElement !== element) {\n        // Config presets (e.g. tags.js, attrs.js) are immutable.\n        if (!isFrozen(array)) {\n          array[l] = lcElement;\n        }\n\n        element = lcElement;\n      }\n    }\n\n    set[element] = true;\n  }\n\n  return set;\n}\n\n/* Shallow clone an object */\nexport function clone(object) {\n  const newObject = create(null);\n\n  for (const [property, value] of entries(object)) {\n    newObject[property] = value;\n  }\n\n  return newObject;\n}\n\n/* This method automatically checks if the prop is function\n * or getter and behaves accordingly. */\nfunction lookupGetter(object, prop) {\n  while (object !== null) {\n    const desc = getOwnPropertyDescriptor(object, prop);\n    if (desc) {\n      if (desc.get) {\n        return unapply(desc.get);\n      }\n\n      if (typeof desc.value === 'function') {\n        return unapply(desc.value);\n      }\n    }\n\n    object = getPrototypeOf(object);\n  }\n\n  function fallbackValue(element) {\n    console.warn('fallback value for', element);\n    return null;\n  }\n\n  return fallbackValue;\n}\n\nexport {\n  // Array\n  arrayForEach,\n  arrayIndexOf,\n  arrayPop,\n  arrayPush,\n  arraySlice,\n  // Object\n  entries,\n  freeze,\n  getPrototypeOf,\n  getOwnPropertyDescriptor,\n  isFrozen,\n  setPrototypeOf,\n  seal,\n  // RegExp\n  regExpTest,\n  // String\n  stringIndexOf,\n  stringMatch,\n  stringReplace,\n  stringToLowerCase,\n  stringToString,\n  stringTrim,\n  // Errors\n  typeErrorCreate,\n  // Other\n  lookupGetter,\n};\n","import { freeze } from './utils.js';\n\nexport const html = freeze([\n  'a',\n  'abbr',\n  'acronym',\n  'address',\n  'area',\n  'article',\n  'aside',\n  'audio',\n  'b',\n  'bdi',\n  'bdo',\n  'big',\n  'blink',\n  'blockquote',\n  'body',\n  'br',\n  'button',\n  'canvas',\n  'caption',\n  'center',\n  'cite',\n  'code',\n  'col',\n  'colgroup',\n  'content',\n  'data',\n  'datalist',\n  'dd',\n  'decorator',\n  'del',\n  'details',\n  'dfn',\n  'dialog',\n  'dir',\n  'div',\n  'dl',\n  'dt',\n  'element',\n  'em',\n  'fieldset',\n  'figcaption',\n  'figure',\n  'font',\n  'footer',\n  'form',\n  'h1',\n  'h2',\n  'h3',\n  'h4',\n  'h5',\n  'h6',\n  'head',\n  'header',\n  'hgroup',\n  'hr',\n  'html',\n  'i',\n  'img',\n  'input',\n  'ins',\n  'kbd',\n  'label',\n  'legend',\n  'li',\n  'main',\n  'map',\n  'mark',\n  'marquee',\n  'menu',\n  'menuitem',\n  'meter',\n  'nav',\n  'nobr',\n  'ol',\n  'optgroup',\n  'option',\n  'output',\n  'p',\n  'picture',\n  'pre',\n  'progress',\n  'q',\n  'rp',\n  'rt',\n  'ruby',\n  's',\n  'samp',\n  'section',\n  'select',\n  'shadow',\n  'small',\n  'source',\n  'spacer',\n  'span',\n  'strike',\n  'strong',\n  'style',\n  'sub',\n  'summary',\n  'sup',\n  'table',\n  'tbody',\n  'td',\n  'template',\n  'textarea',\n  'tfoot',\n  'th',\n  'thead',\n  'time',\n  'tr',\n  'track',\n  'tt',\n  'u',\n  'ul',\n  'var',\n  'video',\n  'wbr',\n]);\n\n// SVG\nexport const svg = freeze([\n  'svg',\n  'a',\n  'altglyph',\n  'altglyphdef',\n  'altglyphitem',\n  'animatecolor',\n  'animatemotion',\n  'animatetransform',\n  'circle',\n  'clippath',\n  'defs',\n  'desc',\n  'ellipse',\n  'filter',\n  'font',\n  'g',\n  'glyph',\n  'glyphref',\n  'hkern',\n  'image',\n  'line',\n  'lineargradient',\n  'marker',\n  'mask',\n  'metadata',\n  'mpath',\n  'path',\n  'pattern',\n  'polygon',\n  'polyline',\n  'radialgradient',\n  'rect',\n  'stop',\n  'style',\n  'switch',\n  'symbol',\n  'text',\n  'textpath',\n  'title',\n  'tref',\n  'tspan',\n  'view',\n  'vkern',\n]);\n\nexport const svgFilters = freeze([\n  'feBlend',\n  'feColorMatrix',\n  'feComponentTransfer',\n  'feComposite',\n  'feConvolveMatrix',\n  'feDiffuseLighting',\n  'feDisplacementMap',\n  'feDistantLight',\n  'feFlood',\n  'feFuncA',\n  'feFuncB',\n  'feFuncG',\n  'feFuncR',\n  'feGaussianBlur',\n  'feImage',\n  'feMerge',\n  'feMergeNode',\n  'feMorphology',\n  'feOffset',\n  'fePointLight',\n  'feSpecularLighting',\n  'feSpotLight',\n  'feTile',\n  'feTurbulence',\n]);\n\n// List of SVG elements that are disallowed by default.\n// We still need to know them so that we can do namespace\n// checks properly in case one wants to add them to\n// allow-list.\nexport const svgDisallowed = freeze([\n  'animate',\n  'color-profile',\n  'cursor',\n  'discard',\n  'fedropshadow',\n  'font-face',\n  'font-face-format',\n  'font-face-name',\n  'font-face-src',\n  'font-face-uri',\n  'foreignobject',\n  'hatch',\n  'hatchpath',\n  'mesh',\n  'meshgradient',\n  'meshpatch',\n  'meshrow',\n  'missing-glyph',\n  'script',\n  'set',\n  'solidcolor',\n  'unknown',\n  'use',\n]);\n\nexport const mathMl = freeze([\n  'math',\n  'menclose',\n  'merror',\n  'mfenced',\n  'mfrac',\n  'mglyph',\n  'mi',\n  'mlabeledtr',\n  'mmultiscripts',\n  'mn',\n  'mo',\n  'mover',\n  'mpadded',\n  'mphantom',\n  'mroot',\n  'mrow',\n  'ms',\n  'mspace',\n  'msqrt',\n  'mstyle',\n  'msub',\n  'msup',\n  'msubsup',\n  'mtable',\n  'mtd',\n  'mtext',\n  'mtr',\n  'munder',\n  'munderover',\n  'mprescripts',\n]);\n\n// Similarly to SVG, we want to know all MathML elements,\n// even those that we disallow by default.\nexport const mathMlDisallowed = freeze([\n  'maction',\n  'maligngroup',\n  'malignmark',\n  'mlongdiv',\n  'mscarries',\n  'mscarry',\n  'msgroup',\n  'mstack',\n  'msline',\n  'msrow',\n  'semantics',\n  'annotation',\n  'annotation-xml',\n  'mprescripts',\n  'none',\n]);\n\nexport const text = freeze(['#text']);\n","import { freeze } from './utils.js';\n\nexport const html = freeze([\n  'accept',\n  'action',\n  'align',\n  'alt',\n  'autocapitalize',\n  'autocomplete',\n  'autopictureinpicture',\n  'autoplay',\n  'background',\n  'bgcolor',\n  'border',\n  'capture',\n  'cellpadding',\n  'cellspacing',\n  'checked',\n  'cite',\n  'class',\n  'clear',\n  'color',\n  'cols',\n  'colspan',\n  'controls',\n  'controlslist',\n  'coords',\n  'crossorigin',\n  'datetime',\n  'decoding',\n  'default',\n  'dir',\n  'disabled',\n  'disablepictureinpicture',\n  'disableremoteplayback',\n  'download',\n  'draggable',\n  'enctype',\n  'enterkeyhint',\n  'face',\n  'for',\n  'headers',\n  'height',\n  'hidden',\n  'high',\n  'href',\n  'hreflang',\n  'id',\n  'inputmode',\n  'integrity',\n  'ismap',\n  'kind',\n  'label',\n  'lang',\n  'list',\n  'loading',\n  'loop',\n  'low',\n  'max',\n  'maxlength',\n  'media',\n  'method',\n  'min',\n  'minlength',\n  'multiple',\n  'muted',\n  'name',\n  'nonce',\n  'noshade',\n  'novalidate',\n  'nowrap',\n  'open',\n  'optimum',\n  'pattern',\n  'placeholder',\n  'playsinline',\n  'poster',\n  'preload',\n  'pubdate',\n  'radiogroup',\n  'readonly',\n  'rel',\n  'required',\n  'rev',\n  'reversed',\n  'role',\n  'rows',\n  'rowspan',\n  'spellcheck',\n  'scope',\n  'selected',\n  'shape',\n  'size',\n  'sizes',\n  'span',\n  'srclang',\n  'start',\n  'src',\n  'srcset',\n  'step',\n  'style',\n  'summary',\n  'tabindex',\n  'title',\n  'translate',\n  'type',\n  'usemap',\n  'valign',\n  'value',\n  'width',\n  'xmlns',\n  'slot',\n]);\n\nexport const svg = freeze([\n  'accent-height',\n  'accumulate',\n  'additive',\n  'alignment-baseline',\n  'ascent',\n  'attributename',\n  'attributetype',\n  'azimuth',\n  'basefrequency',\n  'baseline-shift',\n  'begin',\n  'bias',\n  'by',\n  'class',\n  'clip',\n  'clippathunits',\n  'clip-path',\n  'clip-rule',\n  'color',\n  'color-interpolation',\n  'color-interpolation-filters',\n  'color-profile',\n  'color-rendering',\n  'cx',\n  'cy',\n  'd',\n  'dx',\n  'dy',\n  'diffuseconstant',\n  'direction',\n  'display',\n  'divisor',\n  'dur',\n  'edgemode',\n  'elevation',\n  'end',\n  'fill',\n  'fill-opacity',\n  'fill-rule',\n  'filter',\n  'filterunits',\n  'flood-color',\n  'flood-opacity',\n  'font-family',\n  'font-size',\n  'font-size-adjust',\n  'font-stretch',\n  'font-style',\n  'font-variant',\n  'font-weight',\n  'fx',\n  'fy',\n  'g1',\n  'g2',\n  'glyph-name',\n  'glyphref',\n  'gradientunits',\n  'gradienttransform',\n  'height',\n  'href',\n  'id',\n  'image-rendering',\n  'in',\n  'in2',\n  'k',\n  'k1',\n  'k2',\n  'k3',\n  'k4',\n  'kerning',\n  'keypoints',\n  'keysplines',\n  'keytimes',\n  'lang',\n  'lengthadjust',\n  'letter-spacing',\n  'kernelmatrix',\n  'kernelunitlength',\n  'lighting-color',\n  'local',\n  'marker-end',\n  'marker-mid',\n  'marker-start',\n  'markerheight',\n  'markerunits',\n  'markerwidth',\n  'maskcontentunits',\n  'maskunits',\n  'max',\n  'mask',\n  'media',\n  'method',\n  'mode',\n  'min',\n  'name',\n  'numoctaves',\n  'offset',\n  'operator',\n  'opacity',\n  'order',\n  'orient',\n  'orientation',\n  'origin',\n  'overflow',\n  'paint-order',\n  'path',\n  'pathlength',\n  'patterncontentunits',\n  'patterntransform',\n  'patternunits',\n  'points',\n  'preservealpha',\n  'preserveaspectratio',\n  'primitiveunits',\n  'r',\n  'rx',\n  'ry',\n  'radius',\n  'refx',\n  'refy',\n  'repeatcount',\n  'repeatdur',\n  'restart',\n  'result',\n  'rotate',\n  'scale',\n  'seed',\n  'shape-rendering',\n  'specularconstant',\n  'specularexponent',\n  'spreadmethod',\n  'startoffset',\n  'stddeviation',\n  'stitchtiles',\n  'stop-color',\n  'stop-opacity',\n  'stroke-dasharray',\n  'stroke-dashoffset',\n  'stroke-linecap',\n  'stroke-linejoin',\n  'stroke-miterlimit',\n  'stroke-opacity',\n  'stroke',\n  'stroke-width',\n  'style',\n  'surfacescale',\n  'systemlanguage',\n  'tabindex',\n  'targetx',\n  'targety',\n  'transform',\n  'transform-origin',\n  'text-anchor',\n  'text-decoration',\n  'text-rendering',\n  'textlength',\n  'type',\n  'u1',\n  'u2',\n  'unicode',\n  'values',\n  'viewbox',\n  'visibility',\n  'version',\n  'vert-adv-y',\n  'vert-origin-x',\n  'vert-origin-y',\n  'width',\n  'word-spacing',\n  'wrap',\n  'writing-mode',\n  'xchannelselector',\n  'ychannelselector',\n  'x',\n  'x1',\n  'x2',\n  'xmlns',\n  'y',\n  'y1',\n  'y2',\n  'z',\n  'zoomandpan',\n]);\n\nexport const mathMl = freeze([\n  'accent',\n  'accentunder',\n  'align',\n  'bevelled',\n  'close',\n  'columnsalign',\n  'columnlines',\n  'columnspan',\n  'denomalign',\n  'depth',\n  'dir',\n  'display',\n  'displaystyle',\n  'encoding',\n  'fence',\n  'frame',\n  'height',\n  'href',\n  'id',\n  'largeop',\n  'length',\n  'linethickness',\n  'lspace',\n  'lquote',\n  'mathbackground',\n  'mathcolor',\n  'mathsize',\n  'mathvariant',\n  'maxsize',\n  'minsize',\n  'movablelimits',\n  'notation',\n  'numalign',\n  'open',\n  'rowalign',\n  'rowlines',\n  'rowspacing',\n  'rowspan',\n  'rspace',\n  'rquote',\n  'scriptlevel',\n  'scriptminsize',\n  'scriptsizemultiplier',\n  'selection',\n  'separator',\n  'separators',\n  'stretchy',\n  'subscriptshift',\n  'supscriptshift',\n  'symmetric',\n  'voffset',\n  'width',\n  'xmlns',\n]);\n\nexport const xml = freeze([\n  'xlink:href',\n  'xml:id',\n  'xlink:title',\n  'xml:space',\n  'xmlns:xlink',\n]);\n","import { seal } from './utils.js';\n\n// eslint-disable-next-line unicorn/better-regex\nexport const MUSTACHE_EXPR = seal(/\\{\\{[\\w\\W]*|[\\w\\W]*\\}\\}/gm); // Specify template detection regex for SAFE_FOR_TEMPLATES mode\nexport const ERB_EXPR = seal(/<%[\\w\\W]*|[\\w\\W]*%>/gm);\nexport const TMPLIT_EXPR = seal(/\\${[\\w\\W]*}/gm);\nexport const DATA_ATTR = seal(/^data-[\\-\\w.\\u00B7-\\uFFFF]/); // eslint-disable-line no-useless-escape\nexport const ARIA_ATTR = seal(/^aria-[\\-\\w]+$/); // eslint-disable-line no-useless-escape\nexport const IS_ALLOWED_URI = seal(\n  /^(?:(?:(?:f|ht)tps?|mailto|tel|callto|sms|cid|xmpp):|[^a-z]|[a-z+.\\-]+(?:[^a-z+.\\-:]|$))/i // eslint-disable-line no-useless-escape\n);\nexport const IS_SCRIPT_OR_DATA = seal(/^(?:\\w+script|data):/i);\nexport const ATTR_WHITESPACE = seal(\n  /[\\u0000-\\u0020\\u00A0\\u1680\\u180E\\u2000-\\u2029\\u205F\\u3000]/g // eslint-disable-line no-control-regex\n);\nexport const DOCTYPE_NAME = seal(/^html$/i);\n","import * as TAGS from './tags.js';\nimport * as ATTRS from './attrs.js';\nimport * as EXPRESSIONS from './regexp.js';\nimport {\n  addToSet,\n  clone,\n  entries,\n  freeze,\n  arrayForEach,\n  arrayPop,\n  arrayPush,\n  stringMatch,\n  stringReplace,\n  stringToLowerCase,\n  stringToString,\n  stringIndexOf,\n  stringTrim,\n  regExpTest,\n  typeErrorCreate,\n  lookupGetter,\n} from './utils.js';\n\nconst getGlobal = () => (typeof window === 'undefined' ? null : window);\n\n/**\n * Creates a no-op policy for internal use only.\n * Don't export this function outside this module!\n * @param {?TrustedTypePolicyFactory} trustedTypes The policy factory.\n * @param {Document} document The document object (to determine policy name suffix)\n * @return {?TrustedTypePolicy} The policy created (or null, if Trusted Types\n * are not supported).\n */\nconst _createTrustedTypesPolicy = function (trustedTypes, document) {\n  if (\n    typeof trustedTypes !== 'object' ||\n    typeof trustedTypes.createPolicy !== 'function'\n  ) {\n    return null;\n  }\n\n  // Allow the callers to control the unique policy name\n  // by adding a data-tt-policy-suffix to the script element with the DOMPurify.\n  // Policy creation with duplicate names throws in Trusted Types.\n  let suffix = null;\n  const ATTR_NAME = 'data-tt-policy-suffix';\n  if (\n    document.currentScript &&\n    document.currentScript.hasAttribute(ATTR_NAME)\n  ) {\n    suffix = document.currentScript.getAttribute(ATTR_NAME);\n  }\n\n  const policyName = 'dompurify' + (suffix ? '#' + suffix : '');\n\n  try {\n    return trustedTypes.createPolicy(policyName, {\n      createHTML(html) {\n        return html;\n      },\n      createScriptURL(scriptUrl) {\n        return scriptUrl;\n      },\n    });\n  } catch (_) {\n    // Policy creation failed (most likely another DOMPurify script has\n    // already run). Skip creating the policy, as this will only cause errors\n    // if TT are enforced.\n    console.warn(\n      'TrustedTypes policy ' + policyName + ' could not be created.'\n    );\n    return null;\n  }\n};\n\nfunction createDOMPurify(window = getGlobal()) {\n  const DOMPurify = (root) => createDOMPurify(root);\n\n  /**\n   * Version label, exposed for easier checks\n   * if DOMPurify is up to date or not\n   */\n  DOMPurify.version = VERSION;\n\n  /**\n   * Array of elements that DOMPurify removed during sanitation.\n   * Empty if nothing was removed.\n   */\n  DOMPurify.removed = [];\n\n  if (!window || !window.document || window.document.nodeType !== 9) {\n    // Not running in a browser, provide a factory function\n    // so that you can pass your own Window\n    DOMPurify.isSupported = false;\n\n    return DOMPurify;\n  }\n\n  const originalDocument = window.document;\n\n  let { document } = window;\n  const {\n    DocumentFragment,\n    HTMLTemplateElement,\n    Node,\n    Element,\n    NodeFilter,\n    NamedNodeMap = window.NamedNodeMap || window.MozNamedAttrMap,\n    HTMLFormElement,\n    DOMParser,\n    trustedTypes,\n  } = window;\n\n  const ElementPrototype = Element.prototype;\n\n  const cloneNode = lookupGetter(ElementPrototype, 'cloneNode');\n  const getNextSibling = lookupGetter(ElementPrototype, 'nextSibling');\n  const getChildNodes = lookupGetter(ElementPrototype, 'childNodes');\n  const getParentNode = lookupGetter(ElementPrototype, 'parentNode');\n\n  // As per issue #47, the web-components registry is inherited by a\n  // new document created via createHTMLDocument. As per the spec\n  // (http://w3c.github.io/webcomponents/spec/custom/#creating-and-passing-registries)\n  // a new empty registry is used when creating a template contents owner\n  // document, so we use that as our parent document to ensure nothing\n  // is inherited.\n  if (typeof HTMLTemplateElement === 'function') {\n    const template = document.createElement('template');\n    if (template.content && template.content.ownerDocument) {\n      document = template.content.ownerDocument;\n    }\n  }\n\n  const trustedTypesPolicy = _createTrustedTypesPolicy(\n    trustedTypes,\n    originalDocument\n  );\n  const emptyHTML = trustedTypesPolicy ? trustedTypesPolicy.createHTML('') : '';\n\n  const {\n    implementation,\n    createNodeIterator,\n    createDocumentFragment,\n    getElementsByTagName,\n  } = document;\n  const { importNode } = originalDocument;\n\n  let hooks = {};\n\n  /**\n   * Expose whether this browser supports running the full DOMPurify.\n   */\n  DOMPurify.isSupported =\n    typeof entries === 'function' &&\n    typeof getParentNode === 'function' &&\n    implementation &&\n    typeof implementation.createHTMLDocument !== 'undefined';\n\n  const {\n    MUSTACHE_EXPR,\n    ERB_EXPR,\n    TMPLIT_EXPR,\n    DATA_ATTR,\n    ARIA_ATTR,\n    IS_SCRIPT_OR_DATA,\n    ATTR_WHITESPACE,\n  } = EXPRESSIONS;\n\n  let { IS_ALLOWED_URI } = EXPRESSIONS;\n\n  /**\n   * We consider the elements and attributes below to be safe. Ideally\n   * don't add any new ones but feel free to remove unwanted ones.\n   */\n\n  /* allowed element names */\n  let ALLOWED_TAGS = null;\n  const DEFAULT_ALLOWED_TAGS = addToSet({}, [\n    ...TAGS.html,\n    ...TAGS.svg,\n    ...TAGS.svgFilters,\n    ...TAGS.mathMl,\n    ...TAGS.text,\n  ]);\n\n  /* Allowed attribute names */\n  let ALLOWED_ATTR = null;\n  const DEFAULT_ALLOWED_ATTR = addToSet({}, [\n    ...ATTRS.html,\n    ...ATTRS.svg,\n    ...ATTRS.mathMl,\n    ...ATTRS.xml,\n  ]);\n\n  /*\n   * Configure how DOMPUrify should handle custom elements and their attributes as well as customized built-in elements.\n   * @property {RegExp|Function|null} tagNameCheck one of [null, regexPattern, predicate]. Default: `null` (disallow any custom elements)\n   * @property {RegExp|Function|null} attributeNameCheck one of [null, regexPattern, predicate]. Default: `null` (disallow any attributes not on the allow list)\n   * @property {boolean} allowCustomizedBuiltInElements allow custom elements derived from built-ins if they pass CUSTOM_ELEMENT_HANDLING.tagNameCheck. Default: `false`.\n   */\n  let CUSTOM_ELEMENT_HANDLING = Object.seal(\n    Object.create(null, {\n      tagNameCheck: {\n        writable: true,\n        configurable: false,\n        enumerable: true,\n        value: null,\n      },\n      attributeNameCheck: {\n        writable: true,\n        configurable: false,\n        enumerable: true,\n        value: null,\n      },\n      allowCustomizedBuiltInElements: {\n        writable: true,\n        configurable: false,\n        enumerable: true,\n        value: false,\n      },\n    })\n  );\n\n  /* Explicitly forbidden tags (overrides ALLOWED_TAGS/ADD_TAGS) */\n  let FORBID_TAGS = null;\n\n  /* Explicitly forbidden attributes (overrides ALLOWED_ATTR/ADD_ATTR) */\n  let FORBID_ATTR = null;\n\n  /* Decide if ARIA attributes are okay */\n  let ALLOW_ARIA_ATTR = true;\n\n  /* Decide if custom data attributes are okay */\n  let ALLOW_DATA_ATTR = true;\n\n  /* Decide if unknown protocols are okay */\n  let ALLOW_UNKNOWN_PROTOCOLS = false;\n\n  /* Decide if self-closing tags in attributes are allowed.\n   * Usually removed due to a mXSS issue in jQuery 3.0 */\n  let ALLOW_SELF_CLOSE_IN_ATTR = true;\n\n  /* Output should be safe for common template engines.\n   * This means, DOMPurify removes data attributes, mustaches and ERB\n   */\n  let SAFE_FOR_TEMPLATES = false;\n\n  /* Decide if document with <html>... should be returned */\n  let WHOLE_DOCUMENT = false;\n\n  /* Track whether config is already set on this instance of DOMPurify. */\n  let SET_CONFIG = false;\n\n  /* Decide if all elements (e.g. style, script) must be children of\n   * document.body. By default, browsers might move them to document.head */\n  let FORCE_BODY = false;\n\n  /* Decide if a DOM `HTMLBodyElement` should be returned, instead of a html\n   * string (or a TrustedHTML object if Trusted Types are supported).\n   * If `WHOLE_DOCUMENT` is enabled a `HTMLHtmlElement` will be returned instead\n   */\n  let RETURN_DOM = false;\n\n  /* Decide if a DOM `DocumentFragment` should be returned, instead of a html\n   * string  (or a TrustedHTML object if Trusted Types are supported) */\n  let RETURN_DOM_FRAGMENT = false;\n\n  /* Try to return a Trusted Type object instead of a string, return a string in\n   * case Trusted Types are not supported  */\n  let RETURN_TRUSTED_TYPE = false;\n\n  /* Output should be free from DOM clobbering attacks?\n   * This sanitizes markups named with colliding, clobberable built-in DOM APIs.\n   */\n  let SANITIZE_DOM = true;\n\n  /* Achieve full DOM Clobbering protection by isolating the namespace of named\n   * properties and JS variables, mitigating attacks that abuse the HTML/DOM spec rules.\n   *\n   * HTML/DOM spec rules that enable DOM Clobbering:\n   *   - Named Access on Window (§7.3.3)\n   *   - DOM Tree Accessors (§3.1.5)\n   *   - Form Element Parent-Child Relations (§4.10.3)\n   *   - Iframe srcdoc / Nested WindowProxies (§4.8.5)\n   *   - HTMLCollection (§4.2.10.2)\n   *\n   * Namespace isolation is implemented by prefixing `id` and `name` attributes\n   * with a constant string, i.e., `user-content-`\n   */\n  let SANITIZE_NAMED_PROPS = false;\n  const SANITIZE_NAMED_PROPS_PREFIX = 'user-content-';\n\n  /* Keep element content when removing element? */\n  let KEEP_CONTENT = true;\n\n  /* If a `Node` is passed to sanitize(), then performs sanitization in-place instead\n   * of importing it into a new Document and returning a sanitized copy */\n  let IN_PLACE = false;\n\n  /* Allow usage of profiles like html, svg and mathMl */\n  let USE_PROFILES = {};\n\n  /* Tags to ignore content of when KEEP_CONTENT is true */\n  let FORBID_CONTENTS = null;\n  const DEFAULT_FORBID_CONTENTS = addToSet({}, [\n    'annotation-xml',\n    'audio',\n    'colgroup',\n    'desc',\n    'foreignobject',\n    'head',\n    'iframe',\n    'math',\n    'mi',\n    'mn',\n    'mo',\n    'ms',\n    'mtext',\n    'noembed',\n    'noframes',\n    'noscript',\n    'plaintext',\n    'script',\n    'style',\n    'svg',\n    'template',\n    'thead',\n    'title',\n    'video',\n    'xmp',\n  ]);\n\n  /* Tags that are safe for data: URIs */\n  let DATA_URI_TAGS = null;\n  const DEFAULT_DATA_URI_TAGS = addToSet({}, [\n    'audio',\n    'video',\n    'img',\n    'source',\n    'image',\n    'track',\n  ]);\n\n  /* Attributes safe for values like \"javascript:\" */\n  let URI_SAFE_ATTRIBUTES = null;\n  const DEFAULT_URI_SAFE_ATTRIBUTES = addToSet({}, [\n    'alt',\n    'class',\n    'for',\n    'id',\n    'label',\n    'name',\n    'pattern',\n    'placeholder',\n    'role',\n    'summary',\n    'title',\n    'value',\n    'style',\n    'xmlns',\n  ]);\n\n  const MATHML_NAMESPACE = 'http://www.w3.org/1998/Math/MathML';\n  const SVG_NAMESPACE = 'http://www.w3.org/2000/svg';\n  const HTML_NAMESPACE = 'http://www.w3.org/1999/xhtml';\n  /* Document namespace */\n  let NAMESPACE = HTML_NAMESPACE;\n  let IS_EMPTY_INPUT = false;\n\n  /* Allowed XHTML+XML namespaces */\n  let ALLOWED_NAMESPACES = null;\n  const DEFAULT_ALLOWED_NAMESPACES = addToSet(\n    {},\n    [MATHML_NAMESPACE, SVG_NAMESPACE, HTML_NAMESPACE],\n    stringToString\n  );\n\n  /* Parsing of strict XHTML documents */\n  let PARSER_MEDIA_TYPE;\n  const SUPPORTED_PARSER_MEDIA_TYPES = ['application/xhtml+xml', 'text/html'];\n  const DEFAULT_PARSER_MEDIA_TYPE = 'text/html';\n  let transformCaseFunc;\n\n  /* Keep a reference to config to pass to hooks */\n  let CONFIG = null;\n\n  /* Ideally, do not touch anything below this line */\n  /* ______________________________________________ */\n\n  const formElement = document.createElement('form');\n\n  const isRegexOrFunction = function (testValue) {\n    return testValue instanceof RegExp || testValue instanceof Function;\n  };\n\n  /**\n   * _parseConfig\n   *\n   * @param  {Object} cfg optional config literal\n   */\n  // eslint-disable-next-line complexity\n  const _parseConfig = function (cfg) {\n    if (CONFIG && CONFIG === cfg) {\n      return;\n    }\n\n    /* Shield configuration object from tampering */\n    if (!cfg || typeof cfg !== 'object') {\n      cfg = {};\n    }\n\n    /* Shield configuration object from prototype pollution */\n    cfg = clone(cfg);\n\n    PARSER_MEDIA_TYPE =\n      // eslint-disable-next-line unicorn/prefer-includes\n      SUPPORTED_PARSER_MEDIA_TYPES.indexOf(cfg.PARSER_MEDIA_TYPE) === -1\n        ? (PARSER_MEDIA_TYPE = DEFAULT_PARSER_MEDIA_TYPE)\n        : (PARSER_MEDIA_TYPE = cfg.PARSER_MEDIA_TYPE);\n\n    // HTML tags and attributes are not case-sensitive, converting to lowercase. Keeping XHTML as is.\n    transformCaseFunc =\n      PARSER_MEDIA_TYPE === 'application/xhtml+xml'\n        ? stringToString\n        : stringToLowerCase;\n\n    /* Set configuration parameters */\n    ALLOWED_TAGS =\n      'ALLOWED_TAGS' in cfg\n        ? addToSet({}, cfg.ALLOWED_TAGS, transformCaseFunc)\n        : DEFAULT_ALLOWED_TAGS;\n    ALLOWED_ATTR =\n      'ALLOWED_ATTR' in cfg\n        ? addToSet({}, cfg.ALLOWED_ATTR, transformCaseFunc)\n        : DEFAULT_ALLOWED_ATTR;\n    ALLOWED_NAMESPACES =\n      'ALLOWED_NAMESPACES' in cfg\n        ? addToSet({}, cfg.ALLOWED_NAMESPACES, stringToString)\n        : DEFAULT_ALLOWED_NAMESPACES;\n    URI_SAFE_ATTRIBUTES =\n      'ADD_URI_SAFE_ATTR' in cfg\n        ? addToSet(\n            clone(DEFAULT_URI_SAFE_ATTRIBUTES), // eslint-disable-line indent\n            cfg.ADD_URI_SAFE_ATTR, // eslint-disable-line indent\n            transformCaseFunc // eslint-disable-line indent\n          ) // eslint-disable-line indent\n        : DEFAULT_URI_SAFE_ATTRIBUTES;\n    DATA_URI_TAGS =\n      'ADD_DATA_URI_TAGS' in cfg\n        ? addToSet(\n            clone(DEFAULT_DATA_URI_TAGS), // eslint-disable-line indent\n            cfg.ADD_DATA_URI_TAGS, // eslint-disable-line indent\n            transformCaseFunc // eslint-disable-line indent\n          ) // eslint-disable-line indent\n        : DEFAULT_DATA_URI_TAGS;\n    FORBID_CONTENTS =\n      'FORBID_CONTENTS' in cfg\n        ? addToSet({}, cfg.FORBID_CONTENTS, transformCaseFunc)\n        : DEFAULT_FORBID_CONTENTS;\n    FORBID_TAGS =\n      'FORBID_TAGS' in cfg\n        ? addToSet({}, cfg.FORBID_TAGS, transformCaseFunc)\n        : {};\n    FORBID_ATTR =\n      'FORBID_ATTR' in cfg\n        ? addToSet({}, cfg.FORBID_ATTR, transformCaseFunc)\n        : {};\n    USE_PROFILES = 'USE_PROFILES' in cfg ? cfg.USE_PROFILES : false;\n    ALLOW_ARIA_ATTR = cfg.ALLOW_ARIA_ATTR !== false; // Default true\n    ALLOW_DATA_ATTR = cfg.ALLOW_DATA_ATTR !== false; // Default true\n    ALLOW_UNKNOWN_PROTOCOLS = cfg.ALLOW_UNKNOWN_PROTOCOLS || false; // Default false\n    ALLOW_SELF_CLOSE_IN_ATTR = cfg.ALLOW_SELF_CLOSE_IN_ATTR !== false; // Default true\n    SAFE_FOR_TEMPLATES = cfg.SAFE_FOR_TEMPLATES || false; // Default false\n    WHOLE_DOCUMENT = cfg.WHOLE_DOCUMENT || false; // Default false\n    RETURN_DOM = cfg.RETURN_DOM || false; // Default false\n    RETURN_DOM_FRAGMENT = cfg.RETURN_DOM_FRAGMENT || false; // Default false\n    RETURN_TRUSTED_TYPE = cfg.RETURN_TRUSTED_TYPE || false; // Default false\n    FORCE_BODY = cfg.FORCE_BODY || false; // Default false\n    SANITIZE_DOM = cfg.SANITIZE_DOM !== false; // Default true\n    SANITIZE_NAMED_PROPS = cfg.SANITIZE_NAMED_PROPS || false; // Default false\n    KEEP_CONTENT = cfg.KEEP_CONTENT !== false; // Default true\n    IN_PLACE = cfg.IN_PLACE || false; // Default false\n    IS_ALLOWED_URI = cfg.ALLOWED_URI_REGEXP || EXPRESSIONS.IS_ALLOWED_URI;\n    NAMESPACE = cfg.NAMESPACE || HTML_NAMESPACE;\n    CUSTOM_ELEMENT_HANDLING = cfg.CUSTOM_ELEMENT_HANDLING || {};\n    if (\n      cfg.CUSTOM_ELEMENT_HANDLING &&\n      isRegexOrFunction(cfg.CUSTOM_ELEMENT_HANDLING.tagNameCheck)\n    ) {\n      CUSTOM_ELEMENT_HANDLING.tagNameCheck =\n        cfg.CUSTOM_ELEMENT_HANDLING.tagNameCheck;\n    }\n\n    if (\n      cfg.CUSTOM_ELEMENT_HANDLING &&\n      isRegexOrFunction(cfg.CUSTOM_ELEMENT_HANDLING.attributeNameCheck)\n    ) {\n      CUSTOM_ELEMENT_HANDLING.attributeNameCheck =\n        cfg.CUSTOM_ELEMENT_HANDLING.attributeNameCheck;\n    }\n\n    if (\n      cfg.CUSTOM_ELEMENT_HANDLING &&\n      typeof cfg.CUSTOM_ELEMENT_HANDLING.allowCustomizedBuiltInElements ===\n        'boolean'\n    ) {\n      CUSTOM_ELEMENT_HANDLING.allowCustomizedBuiltInElements =\n        cfg.CUSTOM_ELEMENT_HANDLING.allowCustomizedBuiltInElements;\n    }\n\n    if (SAFE_FOR_TEMPLATES) {\n      ALLOW_DATA_ATTR = false;\n    }\n\n    if (RETURN_DOM_FRAGMENT) {\n      RETURN_DOM = true;\n    }\n\n    /* Parse profile info */\n    if (USE_PROFILES) {\n      ALLOWED_TAGS = addToSet({}, [...TAGS.text]);\n      ALLOWED_ATTR = [];\n      if (USE_PROFILES.html === true) {\n        addToSet(ALLOWED_TAGS, TAGS.html);\n        addToSet(ALLOWED_ATTR, ATTRS.html);\n      }\n\n      if (USE_PROFILES.svg === true) {\n        addToSet(ALLOWED_TAGS, TAGS.svg);\n        addToSet(ALLOWED_ATTR, ATTRS.svg);\n        addToSet(ALLOWED_ATTR, ATTRS.xml);\n      }\n\n      if (USE_PROFILES.svgFilters === true) {\n        addToSet(ALLOWED_TAGS, TAGS.svgFilters);\n        addToSet(ALLOWED_ATTR, ATTRS.svg);\n        addToSet(ALLOWED_ATTR, ATTRS.xml);\n      }\n\n      if (USE_PROFILES.mathMl === true) {\n        addToSet(ALLOWED_TAGS, TAGS.mathMl);\n        addToSet(ALLOWED_ATTR, ATTRS.mathMl);\n        addToSet(ALLOWED_ATTR, ATTRS.xml);\n      }\n    }\n\n    /* Merge configuration parameters */\n    if (cfg.ADD_TAGS) {\n      if (ALLOWED_TAGS === DEFAULT_ALLOWED_TAGS) {\n        ALLOWED_TAGS = clone(ALLOWED_TAGS);\n      }\n\n      addToSet(ALLOWED_TAGS, cfg.ADD_TAGS, transformCaseFunc);\n    }\n\n    if (cfg.ADD_ATTR) {\n      if (ALLOWED_ATTR === DEFAULT_ALLOWED_ATTR) {\n        ALLOWED_ATTR = clone(ALLOWED_ATTR);\n      }\n\n      addToSet(ALLOWED_ATTR, cfg.ADD_ATTR, transformCaseFunc);\n    }\n\n    if (cfg.ADD_URI_SAFE_ATTR) {\n      addToSet(URI_SAFE_ATTRIBUTES, cfg.ADD_URI_SAFE_ATTR, transformCaseFunc);\n    }\n\n    if (cfg.FORBID_CONTENTS) {\n      if (FORBID_CONTENTS === DEFAULT_FORBID_CONTENTS) {\n        FORBID_CONTENTS = clone(FORBID_CONTENTS);\n      }\n\n      addToSet(FORBID_CONTENTS, cfg.FORBID_CONTENTS, transformCaseFunc);\n    }\n\n    /* Add #text in case KEEP_CONTENT is set to true */\n    if (KEEP_CONTENT) {\n      ALLOWED_TAGS['#text'] = true;\n    }\n\n    /* Add html, head and body to ALLOWED_TAGS in case WHOLE_DOCUMENT is true */\n    if (WHOLE_DOCUMENT) {\n      addToSet(ALLOWED_TAGS, ['html', 'head', 'body']);\n    }\n\n    /* Add tbody to ALLOWED_TAGS in case tables are permitted, see #286, #365 */\n    if (ALLOWED_TAGS.table) {\n      addToSet(ALLOWED_TAGS, ['tbody']);\n      delete FORBID_TAGS.tbody;\n    }\n\n    // Prevent further manipulation of configuration.\n    // Not available in IE8, Safari 5, etc.\n    if (freeze) {\n      freeze(cfg);\n    }\n\n    CONFIG = cfg;\n  };\n\n  const MATHML_TEXT_INTEGRATION_POINTS = addToSet({}, [\n    'mi',\n    'mo',\n    'mn',\n    'ms',\n    'mtext',\n  ]);\n\n  const HTML_INTEGRATION_POINTS = addToSet({}, [\n    'foreignobject',\n    'desc',\n    'title',\n    'annotation-xml',\n  ]);\n\n  // Certain elements are allowed in both SVG and HTML\n  // namespace. We need to specify them explicitly\n  // so that they don't get erroneously deleted from\n  // HTML namespace.\n  const COMMON_SVG_AND_HTML_ELEMENTS = addToSet({}, [\n    'title',\n    'style',\n    'font',\n    'a',\n    'script',\n  ]);\n\n  /* Keep track of all possible SVG and MathML tags\n   * so that we can perform the namespace checks\n   * correctly. */\n  const ALL_SVG_TAGS = addToSet({}, TAGS.svg);\n  addToSet(ALL_SVG_TAGS, TAGS.svgFilters);\n  addToSet(ALL_SVG_TAGS, TAGS.svgDisallowed);\n\n  const ALL_MATHML_TAGS = addToSet({}, TAGS.mathMl);\n  addToSet(ALL_MATHML_TAGS, TAGS.mathMlDisallowed);\n\n  /**\n   *\n   *\n   * @param  {Element} element a DOM element whose namespace is being checked\n   * @returns {boolean} Return false if the element has a\n   *  namespace that a spec-compliant parser would never\n   *  return. Return true otherwise.\n   */\n  const _checkValidNamespace = function (element) {\n    let parent = getParentNode(element);\n\n    // In JSDOM, if we're inside shadow DOM, then parentNode\n    // can be null. We just simulate parent in this case.\n    if (!parent || !parent.tagName) {\n      parent = {\n        namespaceURI: NAMESPACE,\n        tagName: 'template',\n      };\n    }\n\n    const tagName = stringToLowerCase(element.tagName);\n    const parentTagName = stringToLowerCase(parent.tagName);\n\n    if (!ALLOWED_NAMESPACES[element.namespaceURI]) {\n      return false;\n    }\n\n    if (element.namespaceURI === SVG_NAMESPACE) {\n      // The only way to switch from HTML namespace to SVG\n      // is via <svg>. If it happens via any other tag, then\n      // it should be killed.\n      if (parent.namespaceURI === HTML_NAMESPACE) {\n        return tagName === 'svg';\n      }\n\n      // The only way to switch from MathML to SVG is via`\n      // svg if parent is either <annotation-xml> or MathML\n      // text integration points.\n      if (parent.namespaceURI === MATHML_NAMESPACE) {\n        return (\n          tagName === 'svg' &&\n          (parentTagName === 'annotation-xml' ||\n            MATHML_TEXT_INTEGRATION_POINTS[parentTagName])\n        );\n      }\n\n      // We only allow elements that are defined in SVG\n      // spec. All others are disallowed in SVG namespace.\n      return Boolean(ALL_SVG_TAGS[tagName]);\n    }\n\n    if (element.namespaceURI === MATHML_NAMESPACE) {\n      // The only way to switch from HTML namespace to MathML\n      // is via <math>. If it happens via any other tag, then\n      // it should be killed.\n      if (parent.namespaceURI === HTML_NAMESPACE) {\n        return tagName === 'math';\n      }\n\n      // The only way to switch from SVG to MathML is via\n      // <math> and HTML integration points\n      if (parent.namespaceURI === SVG_NAMESPACE) {\n        return tagName === 'math' && HTML_INTEGRATION_POINTS[parentTagName];\n      }\n\n      // We only allow elements that are defined in MathML\n      // spec. All others are disallowed in MathML namespace.\n      return Boolean(ALL_MATHML_TAGS[tagName]);\n    }\n\n    if (element.namespaceURI === HTML_NAMESPACE) {\n      // The only way to switch from SVG to HTML is via\n      // HTML integration points, and from MathML to HTML\n      // is via MathML text integration points\n      if (\n        parent.namespaceURI === SVG_NAMESPACE &&\n        !HTML_INTEGRATION_POINTS[parentTagName]\n      ) {\n        return false;\n      }\n\n      if (\n        parent.namespaceURI === MATHML_NAMESPACE &&\n        !MATHML_TEXT_INTEGRATION_POINTS[parentTagName]\n      ) {\n        return false;\n      }\n\n      // We disallow tags that are specific for MathML\n      // or SVG and should never appear in HTML namespace\n      return (\n        !ALL_MATHML_TAGS[tagName] &&\n        (COMMON_SVG_AND_HTML_ELEMENTS[tagName] || !ALL_SVG_TAGS[tagName])\n      );\n    }\n\n    // For XHTML and XML documents that support custom namespaces\n    if (\n      PARSER_MEDIA_TYPE === 'application/xhtml+xml' &&\n      ALLOWED_NAMESPACES[element.namespaceURI]\n    ) {\n      return true;\n    }\n\n    // The code should never reach this place (this means\n    // that the element somehow got namespace that is not\n    // HTML, SVG, MathML or allowed via ALLOWED_NAMESPACES).\n    // Return false just in case.\n    return false;\n  };\n\n  /**\n   * _forceRemove\n   *\n   * @param  {Node} node a DOM node\n   */\n  const _forceRemove = function (node) {\n    arrayPush(DOMPurify.removed, { element: node });\n    try {\n      // eslint-disable-next-line unicorn/prefer-dom-node-remove\n      node.parentNode.removeChild(node);\n    } catch (_) {\n      node.remove();\n    }\n  };\n\n  /**\n   * _removeAttribute\n   *\n   * @param  {String} name an Attribute name\n   * @param  {Node} node a DOM node\n   */\n  const _removeAttribute = function (name, node) {\n    try {\n      arrayPush(DOMPurify.removed, {\n        attribute: node.getAttributeNode(name),\n        from: node,\n      });\n    } catch (_) {\n      arrayPush(DOMPurify.removed, {\n        attribute: null,\n        from: node,\n      });\n    }\n\n    node.removeAttribute(name);\n\n    // We void attribute values for unremovable \"is\"\" attributes\n    if (name === 'is' && !ALLOWED_ATTR[name]) {\n      if (RETURN_DOM || RETURN_DOM_FRAGMENT) {\n        try {\n          _forceRemove(node);\n        } catch (_) {}\n      } else {\n        try {\n          node.setAttribute(name, '');\n        } catch (_) {}\n      }\n    }\n  };\n\n  /**\n   * _initDocument\n   *\n   * @param  {String} dirty a string of dirty markup\n   * @return {Document} a DOM, filled with the dirty markup\n   */\n  const _initDocument = function (dirty) {\n    /* Create a HTML document */\n    let doc;\n    let leadingWhitespace;\n\n    if (FORCE_BODY) {\n      dirty = '<remove></remove>' + dirty;\n    } else {\n      /* If FORCE_BODY isn't used, leading whitespace needs to be preserved manually */\n      const matches = stringMatch(dirty, /^[\\r\\n\\t ]+/);\n      leadingWhitespace = matches && matches[0];\n    }\n\n    if (\n      PARSER_MEDIA_TYPE === 'application/xhtml+xml' &&\n      NAMESPACE === HTML_NAMESPACE\n    ) {\n      // Root of XHTML doc must contain xmlns declaration (see https://www.w3.org/TR/xhtml1/normative.html#strict)\n      dirty =\n        '<html xmlns=\"http://www.w3.org/1999/xhtml\"><head></head><body>' +\n        dirty +\n        '</body></html>';\n    }\n\n    const dirtyPayload = trustedTypesPolicy\n      ? trustedTypesPolicy.createHTML(dirty)\n      : dirty;\n    /*\n     * Use the DOMParser API by default, fallback later if needs be\n     * DOMParser not work for svg when has multiple root element.\n     */\n    if (NAMESPACE === HTML_NAMESPACE) {\n      try {\n        doc = new DOMParser().parseFromString(dirtyPayload, PARSER_MEDIA_TYPE);\n      } catch (_) {}\n    }\n\n    /* Use createHTMLDocument in case DOMParser is not available */\n    if (!doc || !doc.documentElement) {\n      doc = implementation.createDocument(NAMESPACE, 'template', null);\n      try {\n        doc.documentElement.innerHTML = IS_EMPTY_INPUT\n          ? emptyHTML\n          : dirtyPayload;\n      } catch (_) {\n        // Syntax error if dirtyPayload is invalid xml\n      }\n    }\n\n    const body = doc.body || doc.documentElement;\n\n    if (dirty && leadingWhitespace) {\n      body.insertBefore(\n        document.createTextNode(leadingWhitespace),\n        body.childNodes[0] || null\n      );\n    }\n\n    /* Work on whole document or just its body */\n    if (NAMESPACE === HTML_NAMESPACE) {\n      return getElementsByTagName.call(\n        doc,\n        WHOLE_DOCUMENT ? 'html' : 'body'\n      )[0];\n    }\n\n    return WHOLE_DOCUMENT ? doc.documentElement : body;\n  };\n\n  /**\n   * _createIterator\n   *\n   * @param  {Document} root document/fragment to create iterator for\n   * @return {Iterator} iterator instance\n   */\n  const _createIterator = function (root) {\n    return createNodeIterator.call(\n      root.ownerDocument || root,\n      root,\n      // eslint-disable-next-line no-bitwise\n      NodeFilter.SHOW_ELEMENT | NodeFilter.SHOW_COMMENT | NodeFilter.SHOW_TEXT,\n      null,\n      false\n    );\n  };\n\n  /**\n   * _isClobbered\n   *\n   * @param  {Node} elm element to check for clobbering attacks\n   * @return {Boolean} true if clobbered, false if safe\n   */\n  const _isClobbered = function (elm) {\n    return (\n      elm instanceof HTMLFormElement &&\n      (typeof elm.nodeName !== 'string' ||\n        typeof elm.textContent !== 'string' ||\n        typeof elm.removeChild !== 'function' ||\n        !(elm.attributes instanceof NamedNodeMap) ||\n        typeof elm.removeAttribute !== 'function' ||\n        typeof elm.setAttribute !== 'function' ||\n        typeof elm.namespaceURI !== 'string' ||\n        typeof elm.insertBefore !== 'function' ||\n        typeof elm.hasChildNodes !== 'function')\n    );\n  };\n\n  /**\n   * _isNode\n   *\n   * @param  {Node} obj object to check whether it's a DOM node\n   * @return {Boolean} true is object is a DOM node\n   */\n  const _isNode = function (object) {\n    return typeof Node === 'object'\n      ? object instanceof Node\n      : object &&\n          typeof object === 'object' &&\n          typeof object.nodeType === 'number' &&\n          typeof object.nodeName === 'string';\n  };\n\n  /**\n   * _executeHook\n   * Execute user configurable hooks\n   *\n   * @param  {String} entryPoint  Name of the hook's entry point\n   * @param  {Node} currentNode node to work on with the hook\n   * @param  {Object} data additional hook parameters\n   */\n  const _executeHook = function (entryPoint, currentNode, data) {\n    if (!hooks[entryPoint]) {\n      return;\n    }\n\n    arrayForEach(hooks[entryPoint], (hook) => {\n      hook.call(DOMPurify, currentNode, data, CONFIG);\n    });\n  };\n\n  /**\n   * _sanitizeElements\n   *\n   * @protect nodeName\n   * @protect textContent\n   * @protect removeChild\n   *\n   * @param   {Node} currentNode to check for permission to exist\n   * @return  {Boolean} true if node was killed, false if left alive\n   */\n  const _sanitizeElements = function (currentNode) {\n    let content;\n\n    /* Execute a hook if present */\n    _executeHook('beforeSanitizeElements', currentNode, null);\n\n    /* Check if element is clobbered or can clobber */\n    if (_isClobbered(currentNode)) {\n      _forceRemove(currentNode);\n      return true;\n    }\n\n    /* Now let's check the element's type and name */\n    const tagName = transformCaseFunc(currentNode.nodeName);\n\n    /* Execute a hook if present */\n    _executeHook('uponSanitizeElement', currentNode, {\n      tagName,\n      allowedTags: ALLOWED_TAGS,\n    });\n\n    /* Detect mXSS attempts abusing namespace confusion */\n    if (\n      currentNode.hasChildNodes() &&\n      !_isNode(currentNode.firstElementChild) &&\n      (!_isNode(currentNode.content) ||\n        !_isNode(currentNode.content.firstElementChild)) &&\n      regExpTest(/<[/\\w]/g, currentNode.innerHTML) &&\n      regExpTest(/<[/\\w]/g, currentNode.textContent)\n    ) {\n      _forceRemove(currentNode);\n      return true;\n    }\n\n    /* Remove element if anything forbids its presence */\n    if (!ALLOWED_TAGS[tagName] || FORBID_TAGS[tagName]) {\n      /* Check if we have a custom element to handle */\n      if (!FORBID_TAGS[tagName] && _basicCustomElementTest(tagName)) {\n        if (\n          CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof RegExp &&\n          regExpTest(CUSTOM_ELEMENT_HANDLING.tagNameCheck, tagName)\n        )\n          return false;\n        if (\n          CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof Function &&\n          CUSTOM_ELEMENT_HANDLING.tagNameCheck(tagName)\n        )\n          return false;\n      }\n\n      /* Keep content except for bad-listed elements */\n      if (KEEP_CONTENT && !FORBID_CONTENTS[tagName]) {\n        const parentNode = getParentNode(currentNode) || currentNode.parentNode;\n        const childNodes = getChildNodes(currentNode) || currentNode.childNodes;\n\n        if (childNodes && parentNode) {\n          const childCount = childNodes.length;\n\n          for (let i = childCount - 1; i >= 0; --i) {\n            parentNode.insertBefore(\n              cloneNode(childNodes[i], true),\n              getNextSibling(currentNode)\n            );\n          }\n        }\n      }\n\n      _forceRemove(currentNode);\n      return true;\n    }\n\n    /* Check whether element has a valid namespace */\n    if (currentNode instanceof Element && !_checkValidNamespace(currentNode)) {\n      _forceRemove(currentNode);\n      return true;\n    }\n\n    /* Make sure that older browsers don't get noscript mXSS */\n    if (\n      (tagName === 'noscript' || tagName === 'noembed') &&\n      regExpTest(/<\\/no(script|embed)/i, currentNode.innerHTML)\n    ) {\n      _forceRemove(currentNode);\n      return true;\n    }\n\n    /* Sanitize element content to be template-safe */\n    if (SAFE_FOR_TEMPLATES && currentNode.nodeType === 3) {\n      /* Get the element's text content */\n      content = currentNode.textContent;\n      content = stringReplace(content, MUSTACHE_EXPR, ' ');\n      content = stringReplace(content, ERB_EXPR, ' ');\n      content = stringReplace(content, TMPLIT_EXPR, ' ');\n      if (currentNode.textContent !== content) {\n        arrayPush(DOMPurify.removed, { element: currentNode.cloneNode() });\n        currentNode.textContent = content;\n      }\n    }\n\n    /* Execute a hook if present */\n    _executeHook('afterSanitizeElements', currentNode, null);\n\n    return false;\n  };\n\n  /**\n   * _isValidAttribute\n   *\n   * @param  {string} lcTag Lowercase tag name of containing element.\n   * @param  {string} lcName Lowercase attribute name.\n   * @param  {string} value Attribute value.\n   * @return {Boolean} Returns true if `value` is valid, otherwise false.\n   */\n  // eslint-disable-next-line complexity\n  const _isValidAttribute = function (lcTag, lcName, value) {\n    /* Make sure attribute cannot clobber */\n    if (\n      SANITIZE_DOM &&\n      (lcName === 'id' || lcName === 'name') &&\n      (value in document || value in formElement)\n    ) {\n      return false;\n    }\n\n    /* Allow valid data-* attributes: At least one character after \"-\"\n        (https://html.spec.whatwg.org/multipage/dom.html#embedding-custom-non-visible-data-with-the-data-*-attributes)\n        XML-compatible (https://html.spec.whatwg.org/multipage/infrastructure.html#xml-compatible and http://www.w3.org/TR/xml/#d0e804)\n        We don't need to check the value; it's always URI safe. */\n    if (\n      ALLOW_DATA_ATTR &&\n      !FORBID_ATTR[lcName] &&\n      regExpTest(DATA_ATTR, lcName)\n    ) {\n      // This attribute is safe\n    } else if (ALLOW_ARIA_ATTR && regExpTest(ARIA_ATTR, lcName)) {\n      // This attribute is safe\n      /* Otherwise, check the name is permitted */\n    } else if (!ALLOWED_ATTR[lcName] || FORBID_ATTR[lcName]) {\n      if (\n        // First condition does a very basic check if a) it's basically a valid custom element tagname AND\n        // b) if the tagName passes whatever the user has configured for CUSTOM_ELEMENT_HANDLING.tagNameCheck\n        // and c) if the attribute name passes whatever the user has configured for CUSTOM_ELEMENT_HANDLING.attributeNameCheck\n        (_basicCustomElementTest(lcTag) &&\n          ((CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof RegExp &&\n            regExpTest(CUSTOM_ELEMENT_HANDLING.tagNameCheck, lcTag)) ||\n            (CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof Function &&\n              CUSTOM_ELEMENT_HANDLING.tagNameCheck(lcTag))) &&\n          ((CUSTOM_ELEMENT_HANDLING.attributeNameCheck instanceof RegExp &&\n            regExpTest(CUSTOM_ELEMENT_HANDLING.attributeNameCheck, lcName)) ||\n            (CUSTOM_ELEMENT_HANDLING.attributeNameCheck instanceof Function &&\n              CUSTOM_ELEMENT_HANDLING.attributeNameCheck(lcName)))) ||\n        // Alternative, second condition checks if it's an `is`-attribute, AND\n        // the value passes whatever the user has configured for CUSTOM_ELEMENT_HANDLING.tagNameCheck\n        (lcName === 'is' &&\n          CUSTOM_ELEMENT_HANDLING.allowCustomizedBuiltInElements &&\n          ((CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof RegExp &&\n            regExpTest(CUSTOM_ELEMENT_HANDLING.tagNameCheck, value)) ||\n            (CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof Function &&\n              CUSTOM_ELEMENT_HANDLING.tagNameCheck(value))))\n      ) {\n        // If user has supplied a regexp or function in CUSTOM_ELEMENT_HANDLING.tagNameCheck, we need to also allow derived custom elements using the same tagName test.\n        // Additionally, we need to allow attributes passing the CUSTOM_ELEMENT_HANDLING.attributeNameCheck user has configured, as custom elements can define these at their own discretion.\n      } else {\n        return false;\n      }\n      /* Check value is safe. First, is attr inert? If so, is safe */\n    } else if (URI_SAFE_ATTRIBUTES[lcName]) {\n      // This attribute is safe\n      /* Check no script, data or unknown possibly unsafe URI\n        unless we know URI values are safe for that attribute */\n    } else if (\n      regExpTest(IS_ALLOWED_URI, stringReplace(value, ATTR_WHITESPACE, ''))\n    ) {\n      // This attribute is safe\n      /* Keep image data URIs alive if src/xlink:href is allowed */\n      /* Further prevent gadget XSS for dynamically built script tags */\n    } else if (\n      (lcName === 'src' || lcName === 'xlink:href' || lcName === 'href') &&\n      lcTag !== 'script' &&\n      stringIndexOf(value, 'data:') === 0 &&\n      DATA_URI_TAGS[lcTag]\n    ) {\n      // This attribute is safe\n      /* Allow unknown protocols: This provides support for links that\n        are handled by protocol handlers which may be unknown ahead of\n        time, e.g. fb:, spotify: */\n    } else if (\n      ALLOW_UNKNOWN_PROTOCOLS &&\n      !regExpTest(IS_SCRIPT_OR_DATA, stringReplace(value, ATTR_WHITESPACE, ''))\n    ) {\n      // This attribute is safe\n      /* Check for binary attributes */\n      // eslint-disable-next-line no-negated-condition\n    } else if (!value) {\n      // Binary attributes are safe at this point\n      /* Anything else, presume unsafe, do not add it back */\n    } else {\n      return false;\n    }\n\n    return true;\n  };\n\n  /**\n   * _basicCustomElementCheck\n   * checks if at least one dash is included in tagName, and it's not the first char\n   * for more sophisticated checking see https://github.com/sindresorhus/validate-element-name\n   * @param {string} tagName name of the tag of the node to sanitize\n   */\n  const _basicCustomElementTest = function (tagName) {\n    return tagName.indexOf('-') > 0;\n  };\n\n  /**\n   * _sanitizeAttributes\n   *\n   * @protect attributes\n   * @protect nodeName\n   * @protect removeAttribute\n   * @protect setAttribute\n   *\n   * @param  {Node} currentNode to sanitize\n   */\n  const _sanitizeAttributes = function (currentNode) {\n    let attr;\n    let value;\n    let lcName;\n    let l;\n    /* Execute a hook if present */\n    _executeHook('beforeSanitizeAttributes', currentNode, null);\n\n    const { attributes } = currentNode;\n\n    /* Check if we have attributes; if not we might have a text node */\n    if (!attributes) {\n      return;\n    }\n\n    const hookEvent = {\n      attrName: '',\n      attrValue: '',\n      keepAttr: true,\n      allowedAttributes: ALLOWED_ATTR,\n    };\n    l = attributes.length;\n\n    /* Go backwards over all attributes; safely remove bad ones */\n    while (l--) {\n      attr = attributes[l];\n      const { name, namespaceURI } = attr;\n      value = name === 'value' ? attr.value : stringTrim(attr.value);\n      lcName = transformCaseFunc(name);\n\n      /* Execute a hook if present */\n      hookEvent.attrName = lcName;\n      hookEvent.attrValue = value;\n      hookEvent.keepAttr = true;\n      hookEvent.forceKeepAttr = undefined; // Allows developers to see this is a property they can set\n      _executeHook('uponSanitizeAttribute', currentNode, hookEvent);\n      value = hookEvent.attrValue;\n      /* Did the hooks approve of the attribute? */\n      if (hookEvent.forceKeepAttr) {\n        continue;\n      }\n\n      /* Remove attribute */\n      _removeAttribute(name, currentNode);\n\n      /* Did the hooks approve of the attribute? */\n      if (!hookEvent.keepAttr) {\n        continue;\n      }\n\n      /* Work around a security issue in jQuery 3.0 */\n      if (!ALLOW_SELF_CLOSE_IN_ATTR && regExpTest(/\\/>/i, value)) {\n        _removeAttribute(name, currentNode);\n        continue;\n      }\n\n      /* Sanitize attribute content to be template-safe */\n      if (SAFE_FOR_TEMPLATES) {\n        value = stringReplace(value, MUSTACHE_EXPR, ' ');\n        value = stringReplace(value, ERB_EXPR, ' ');\n        value = stringReplace(value, TMPLIT_EXPR, ' ');\n      }\n\n      /* Is `value` valid for this attribute? */\n      const lcTag = transformCaseFunc(currentNode.nodeName);\n      if (!_isValidAttribute(lcTag, lcName, value)) {\n        continue;\n      }\n\n      /* Full DOM Clobbering protection via namespace isolation,\n       * Prefix id and name attributes with `user-content-`\n       */\n      if (SANITIZE_NAMED_PROPS && (lcName === 'id' || lcName === 'name')) {\n        // Remove the attribute with this value\n        _removeAttribute(name, currentNode);\n\n        // Prefix the value and later re-create the attribute with the sanitized value\n        value = SANITIZE_NAMED_PROPS_PREFIX + value;\n      }\n\n      /* Handle attributes that require Trusted Types */\n      if (\n        trustedTypesPolicy &&\n        typeof trustedTypes === 'object' &&\n        typeof trustedTypes.getAttributeType === 'function'\n      ) {\n        if (namespaceURI) {\n          /* Namespaces are not yet supported, see https://bugs.chromium.org/p/chromium/issues/detail?id=1305293 */\n        } else {\n          switch (trustedTypes.getAttributeType(lcTag, lcName)) {\n            case 'TrustedHTML':\n              value = trustedTypesPolicy.createHTML(value);\n              break;\n            case 'TrustedScriptURL':\n              value = trustedTypesPolicy.createScriptURL(value);\n              break;\n            default:\n              break;\n          }\n        }\n      }\n\n      /* Handle invalid data-* attribute set by try-catching it */\n      try {\n        if (namespaceURI) {\n          currentNode.setAttributeNS(namespaceURI, name, value);\n        } else {\n          /* Fallback to setAttribute() for browser-unrecognized namespaces e.g. \"x-schema\". */\n          currentNode.setAttribute(name, value);\n        }\n\n        arrayPop(DOMPurify.removed);\n      } catch (_) {}\n    }\n\n    /* Execute a hook if present */\n    _executeHook('afterSanitizeAttributes', currentNode, null);\n  };\n\n  /**\n   * _sanitizeShadowDOM\n   *\n   * @param  {DocumentFragment} fragment to iterate over recursively\n   */\n  const _sanitizeShadowDOM = function (fragment) {\n    let shadowNode;\n    const shadowIterator = _createIterator(fragment);\n\n    /* Execute a hook if present */\n    _executeHook('beforeSanitizeShadowDOM', fragment, null);\n\n    while ((shadowNode = shadowIterator.nextNode())) {\n      /* Execute a hook if present */\n      _executeHook('uponSanitizeShadowNode', shadowNode, null);\n\n      /* Sanitize tags and elements */\n      if (_sanitizeElements(shadowNode)) {\n        continue;\n      }\n\n      /* Deep shadow DOM detected */\n      if (shadowNode.content instanceof DocumentFragment) {\n        _sanitizeShadowDOM(shadowNode.content);\n      }\n\n      /* Check attributes, sanitize if necessary */\n      _sanitizeAttributes(shadowNode);\n    }\n\n    /* Execute a hook if present */\n    _executeHook('afterSanitizeShadowDOM', fragment, null);\n  };\n\n  /**\n   * Sanitize\n   * Public method providing core sanitation functionality\n   *\n   * @param {String|Node} dirty string or DOM node\n   * @param {Object} configuration object\n   */\n  // eslint-disable-next-line complexity\n  DOMPurify.sanitize = function (dirty, cfg = {}) {\n    let body;\n    let importedNode;\n    let currentNode;\n    let returnNode;\n    /* Make sure we have a string to sanitize.\n      DO NOT return early, as this will return the wrong type if\n      the user has requested a DOM object rather than a string */\n    IS_EMPTY_INPUT = !dirty;\n    if (IS_EMPTY_INPUT) {\n      dirty = '<!-->';\n    }\n\n    /* Stringify, in case dirty is an object */\n    if (typeof dirty !== 'string' && !_isNode(dirty)) {\n      // eslint-disable-next-line no-negated-condition\n      if (typeof dirty.toString !== 'function') {\n        throw typeErrorCreate('toString is not a function');\n      } else {\n        dirty = dirty.toString();\n        if (typeof dirty !== 'string') {\n          throw typeErrorCreate('dirty is not a string, aborting');\n        }\n      }\n    }\n\n    /* Return dirty HTML if DOMPurify cannot run */\n    if (!DOMPurify.isSupported) {\n      return dirty;\n    }\n\n    /* Assign config vars */\n    if (!SET_CONFIG) {\n      _parseConfig(cfg);\n    }\n\n    /* Clean up removed elements */\n    DOMPurify.removed = [];\n\n    /* Check if dirty is correctly typed for IN_PLACE */\n    if (typeof dirty === 'string') {\n      IN_PLACE = false;\n    }\n\n    if (IN_PLACE) {\n      /* Do some early pre-sanitization to avoid unsafe root nodes */\n      if (dirty.nodeName) {\n        const tagName = transformCaseFunc(dirty.nodeName);\n        if (!ALLOWED_TAGS[tagName] || FORBID_TAGS[tagName]) {\n          throw typeErrorCreate(\n            'root node is forbidden and cannot be sanitized in-place'\n          );\n        }\n      }\n    } else if (dirty instanceof Node) {\n      /* If dirty is a DOM element, append to an empty document to avoid\n         elements being stripped by the parser */\n      body = _initDocument('<!---->');\n      importedNode = body.ownerDocument.importNode(dirty, true);\n      if (importedNode.nodeType === 1 && importedNode.nodeName === 'BODY') {\n        /* Node is already a body, use as is */\n        body = importedNode;\n      } else if (importedNode.nodeName === 'HTML') {\n        body = importedNode;\n      } else {\n        // eslint-disable-next-line unicorn/prefer-dom-node-append\n        body.appendChild(importedNode);\n      }\n    } else {\n      /* Exit directly if we have nothing to do */\n      if (\n        !RETURN_DOM &&\n        !SAFE_FOR_TEMPLATES &&\n        !WHOLE_DOCUMENT &&\n        // eslint-disable-next-line unicorn/prefer-includes\n        dirty.indexOf('<') === -1\n      ) {\n        return trustedTypesPolicy && RETURN_TRUSTED_TYPE\n          ? trustedTypesPolicy.createHTML(dirty)\n          : dirty;\n      }\n\n      /* Initialize the document to work on */\n      body = _initDocument(dirty);\n\n      /* Check we have a DOM node from the data */\n      if (!body) {\n        return RETURN_DOM ? null : RETURN_TRUSTED_TYPE ? emptyHTML : '';\n      }\n    }\n\n    /* Remove first element node (ours) if FORCE_BODY is set */\n    if (body && FORCE_BODY) {\n      _forceRemove(body.firstChild);\n    }\n\n    /* Get node iterator */\n    const nodeIterator = _createIterator(IN_PLACE ? dirty : body);\n\n    /* Now start iterating over the created document */\n    while ((currentNode = nodeIterator.nextNode())) {\n      /* Sanitize tags and elements */\n      if (_sanitizeElements(currentNode)) {\n        continue;\n      }\n\n      /* Shadow DOM detected, sanitize it */\n      if (currentNode.content instanceof DocumentFragment) {\n        _sanitizeShadowDOM(currentNode.content);\n      }\n\n      /* Check attributes, sanitize if necessary */\n      _sanitizeAttributes(currentNode);\n    }\n\n    /* If we sanitized `dirty` in-place, return it. */\n    if (IN_PLACE) {\n      return dirty;\n    }\n\n    /* Return sanitized string or DOM */\n    if (RETURN_DOM) {\n      if (RETURN_DOM_FRAGMENT) {\n        returnNode = createDocumentFragment.call(body.ownerDocument);\n\n        while (body.firstChild) {\n          // eslint-disable-next-line unicorn/prefer-dom-node-append\n          returnNode.appendChild(body.firstChild);\n        }\n      } else {\n        returnNode = body;\n      }\n\n      if (ALLOWED_ATTR.shadowroot || ALLOWED_ATTR.shadowrootmod) {\n        /*\n          AdoptNode() is not used because internal state is not reset\n          (e.g. the past names map of a HTMLFormElement), this is safe\n          in theory but we would rather not risk another attack vector.\n          The state that is cloned by importNode() is explicitly defined\n          by the specs.\n        */\n        returnNode = importNode.call(originalDocument, returnNode, true);\n      }\n\n      return returnNode;\n    }\n\n    let serializedHTML = WHOLE_DOCUMENT ? body.outerHTML : body.innerHTML;\n\n    /* Serialize doctype if allowed */\n    if (\n      WHOLE_DOCUMENT &&\n      ALLOWED_TAGS['!doctype'] &&\n      body.ownerDocument &&\n      body.ownerDocument.doctype &&\n      body.ownerDocument.doctype.name &&\n      regExpTest(EXPRESSIONS.DOCTYPE_NAME, body.ownerDocument.doctype.name)\n    ) {\n      serializedHTML =\n        '<!DOCTYPE ' + body.ownerDocument.doctype.name + '>\\n' + serializedHTML;\n    }\n\n    /* Sanitize final string template-safe */\n    if (SAFE_FOR_TEMPLATES) {\n      serializedHTML = stringReplace(serializedHTML, MUSTACHE_EXPR, ' ');\n      serializedHTML = stringReplace(serializedHTML, ERB_EXPR, ' ');\n      serializedHTML = stringReplace(serializedHTML, TMPLIT_EXPR, ' ');\n    }\n\n    return trustedTypesPolicy && RETURN_TRUSTED_TYPE\n      ? trustedTypesPolicy.createHTML(serializedHTML)\n      : serializedHTML;\n  };\n\n  /**\n   * Public method to set the configuration once\n   * setConfig\n   *\n  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Otherwise, uses config defaults.\n   * isValidAttribute\n   *\n   * @param  {string} tag Tag name of containing element.\n   * @param  {string} attr Attribute name.\n   * @param  {string} value Attribute value.\n   * @return {Boolean} Returns true if `value` is valid. 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\ No newline at end of file

programming_language: JavaScript
filename: purify.js
change_type: ModificationType.ADD
diff: @@ -0,0 +1,1603 @@
+/*! @license DOMPurify 3.0.2 | (c) Cure53 and other contributors | Released under the Apache license 2.0 and Mozilla Public License 2.0 | github.com/cure53/DOMPurify/blob/3.0.2/LICENSE */
+
+(function (global, factory) {
+  typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
+  typeof define === 'function' && define.amd ? define(factory) :
+  (global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.DOMPurify = factory());
+})(this, (function () { 'use strict';
+
+  const {
+    entries,
+    setPrototypeOf,
+    isFrozen,
+    getPrototypeOf,
+    getOwnPropertyDescriptor
+  } = Object;
+  let {
+    freeze,
+    seal,
+    create
+  } = Object; // eslint-disable-line import/no-mutable-exports
+
+  let {
+    apply,
+    construct
+  } = typeof Reflect !== 'undefined' && Reflect;
+
+  if (!apply) {
+    apply = function apply(fun, thisValue, args) {
+      return fun.apply(thisValue, args);
+    };
+  }
+
+  if (!freeze) {
+    freeze = function freeze(x) {
+      return x;
+    };
+  }
+
+  if (!seal) {
+    seal = function seal(x) {
+      return x;
+    };
+  }
+
+  if (!construct) {
+    construct = function construct(Func, args) {
+      return new Func(...args);
+    };
+  }
+
+  const arrayForEach = unapply(Array.prototype.forEach);
+  const arrayPop = unapply(Array.prototype.pop);
+  const arrayPush = unapply(Array.prototype.push);
+  const stringToLowerCase = unapply(String.prototype.toLowerCase);
+  const stringToString = unapply(String.prototype.toString);
+  const stringMatch = unapply(String.prototype.match);
+  const stringReplace = unapply(String.prototype.replace);
+  const stringIndexOf = unapply(String.prototype.indexOf);
+  const stringTrim = unapply(String.prototype.trim);
+  const regExpTest = unapply(RegExp.prototype.test);
+  const typeErrorCreate = unconstruct(TypeError);
+  function unapply(func) {
+    return function (thisArg) {
+      for (var _len = arguments.length, args = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
+        args[_key - 1] = arguments[_key];
+      }
+
+      return apply(func, thisArg, args);
+    };
+  }
+  function unconstruct(func) {
+    return function () {
+      for (var _len2 = arguments.length, args = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
+        args[_key2] = arguments[_key2];
+      }
+
+      return construct(func, args);
+    };
+  }
+  /* Add properties to a lookup table */
+
+  function addToSet(set, array, transformCaseFunc) {
+    transformCaseFunc = transformCaseFunc ? transformCaseFunc : stringToLowerCase;
+
+    if (setPrototypeOf) {
+      // Make 'in' and truthy checks like Boolean(set.constructor)
+      // independent of any properties defined on Object.prototype.
+      // Prevent prototype setters from intercepting set as a this value.
+      setPrototypeOf(set, null);
+    }
+
+    let l = array.length;
+
+    while (l--) {
+      let element = array[l];
+
+      if (typeof element === 'string') {
+        const lcElement = transformCaseFunc(element);
+
+        if (lcElement !== element) {
+          // Config presets (e.g. tags.js, attrs.js) are immutable.
+          if (!isFrozen(array)) {
+            array[l] = lcElement;
+          }
+
+          element = lcElement;
+        }
+      }
+
+      set[element] = true;
+    }
+
+    return set;
+  }
+  /* Shallow clone an object */
+
+  function clone(object) {
+    const newObject = create(null);
+
+    for (const [property, value] of entries(object)) {
+      newObject[property] = value;
+    }
+
+    return newObject;
+  }
+  /* This method automatically checks if the prop is function
+   * or getter and behaves accordingly. */
+
+  function lookupGetter(object, prop) {
+    while (object !== null) {
+      const desc = getOwnPropertyDescriptor(object, prop);
+
+      if (desc) {
+        if (desc.get) {
+          return unapply(desc.get);
+        }
+
+        if (typeof desc.value === 'function') {
+          return unapply(desc.value);
+        }
+      }
+
+      object = getPrototypeOf(object);
+    }
+
+    function fallbackValue(element) {
+      console.warn('fallback value for', element);
+      return null;
+    }
+
+    return fallbackValue;
+  }
+
+  const html$1 = freeze(['a', 'abbr', 'acronym', 'address', 'area', 'article', 'aside', 'audio', 'b', 'bdi', 'bdo', 'big', 'blink', 'blockquote', 'body', 'br', 'button', 'canvas', 'caption', 'center', 'cite', 'code', 'col', 'colgroup', 'content', 'data', 'datalist', 'dd', 'decorator', 'del', 'details', 'dfn', 'dialog', 'dir', 'div', 'dl', 'dt', 'element', 'em', 'fieldset', 'figcaption', 'figure', 'font', 'footer', 'form', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'head', 'header', 'hgroup', 'hr', 'html', 'i', 'img', 'input', 'ins', 'kbd', 'label', 'legend', 'li', 'main', 'map', 'mark', 'marquee', 'menu', 'menuitem', 'meter', 'nav', 'nobr', 'ol', 'optgroup', 'option', 'output', 'p', 'picture', 'pre', 'progress', 'q', 'rp', 'rt', 'ruby', 's', 'samp', 'section', 'select', 'shadow', 'small', 'source', 'spacer', 'span', 'strike', 'strong', 'style', 'sub', 'summary', 'sup', 'table', 'tbody', 'td', 'template', 'textarea', 'tfoot', 'th', 'thead', 'time', 'tr', 'track', 'tt', 'u', 'ul', 'var', 'video', 'wbr']); // SVG
+
+  const svg$1 = freeze(['svg', 'a', 'altglyph', 'altglyphdef', 'altglyphitem', 'animatecolor', 'animatemotion', 'animatetransform', 'circle', 'clippath', 'defs', 'desc', 'ellipse', 'filter', 'font', 'g', 'glyph', 'glyphref', 'hkern', 'image', 'line', 'lineargradient', 'marker', 'mask', 'metadata', 'mpath', 'path', 'pattern', 'polygon', 'polyline', 'radialgradient', 'rect', 'stop', 'style', 'switch', 'symbol', 'text', 'textpath', 'title', 'tref', 'tspan', 'view', 'vkern']);
+  const svgFilters = freeze(['feBlend', 'feColorMatrix', 'feComponentTransfer', 'feComposite', 'feConvolveMatrix', 'feDiffuseLighting', 'feDisplacementMap', 'feDistantLight', 'feFlood', 'feFuncA', 'feFuncB', 'feFuncG', 'feFuncR', 'feGaussianBlur', 'feImage', 'feMerge', 'feMergeNode', 'feMorphology', 'feOffset', 'fePointLight', 'feSpecularLighting', 'feSpotLight', 'feTile', 'feTurbulence']); // List of SVG elements that are disallowed by default.
+  // We still need to know them so that we can do namespace
+  // checks properly in case one wants to add them to
+  // allow-list.
+
+  const svgDisallowed = freeze(['animate', 'color-profile', 'cursor', 'discard', 'fedropshadow', 'font-face', 'font-face-format', 'font-face-name', 'font-face-src', 'font-face-uri', 'foreignobject', 'hatch', 'hatchpath', 'mesh', 'meshgradient', 'meshpatch', 'meshrow', 'missing-glyph', 'script', 'set', 'solidcolor', 'unknown', 'use']);
+  const mathMl$1 = freeze(['math', 'menclose', 'merror', 'mfenced', 'mfrac', 'mglyph', 'mi', 'mlabeledtr', 'mmultiscripts', 'mn', 'mo', 'mover', 'mpadded', 'mphantom', 'mroot', 'mrow', 'ms', 'mspace', 'msqrt', 'mstyle', 'msub', 'msup', 'msubsup', 'mtable', 'mtd', 'mtext', 'mtr', 'munder', 'munderover', 'mprescripts']); // Similarly to SVG, we want to know all MathML elements,
+  // even those that we disallow by default.
+
+  const mathMlDisallowed = freeze(['maction', 'maligngroup', 'malignmark', 'mlongdiv', 'mscarries', 'mscarry', 'msgroup', 'mstack', 'msline', 'msrow', 'semantics', 'annotation', 'annotation-xml', 'mprescripts', 'none']);
+  const text = freeze(['#text']);
+
+  const html = freeze(['accept', 'action', 'align', 'alt', 'autocapitalize', 'autocomplete', 'autopictureinpicture', 'autoplay', 'background', 'bgcolor', 'border', 'capture', 'cellpadding', 'cellspacing', 'checked', 'cite', 'class', 'clear', 'color', 'cols', 'colspan', 'controls', 'controlslist', 'coords', 'crossorigin', 'datetime', 'decoding', 'default', 'dir', 'disabled', 'disablepictureinpicture', 'disableremoteplayback', 'download', 'draggable', 'enctype', 'enterkeyhint', 'face', 'for', 'headers', 'height', 'hidden', 'high', 'href', 'hreflang', 'id', 'inputmode', 'integrity', 'ismap', 'kind', 'label', 'lang', 'list', 'loading', 'loop', 'low', 'max', 'maxlength', 'media', 'method', 'min', 'minlength', 'multiple', 'muted', 'name', 'nonce', 'noshade', 'novalidate', 'nowrap', 'open', 'optimum', 'pattern', 'placeholder', 'playsinline', 'poster', 'preload', 'pubdate', 'radiogroup', 'readonly', 'rel', 'required', 'rev', 'reversed', 'role', 'rows', 'rowspan', 'spellcheck', 'scope', 'selected', 'shape', 'size', 'sizes', 'span', 'srclang', 'start', 'src', 'srcset', 'step', 'style', 'summary', 'tabindex', 'title', 'translate', 'type', 'usemap', 'valign', 'value', 'width', 'xmlns', 'slot']);
+  const svg = freeze(['accent-height', 'accumulate', 'additive', 'alignment-baseline', 'ascent', 'attributename', 'attributetype', 'azimuth', 'basefrequency', 'baseline-shift', 'begin', 'bias', 'by', 'class', 'clip', 'clippathunits', 'clip-path', 'clip-rule', 'color', 'color-interpolation', 'color-interpolation-filters', 'color-profile', 'color-rendering', 'cx', 'cy', 'd', 'dx', 'dy', 'diffuseconstant', 'direction', 'display', 'divisor', 'dur', 'edgemode', 'elevation', 'end', 'fill', 'fill-opacity', 'fill-rule', 'filter', 'filterunits', 'flood-color', 'flood-opacity', 'font-family', 'font-size', 'font-size-adjust', 'font-stretch', 'font-style', 'font-variant', 'font-weight', 'fx', 'fy', 'g1', 'g2', 'glyph-name', 'glyphref', 'gradientunits', 'gradienttransform', 'height', 'href', 'id', 'image-rendering', 'in', 'in2', 'k', 'k1', 'k2', 'k3', 'k4', 'kerning', 'keypoints', 'keysplines', 'keytimes', 'lang', 'lengthadjust', 'letter-spacing', 'kernelmatrix', 'kernelunitlength', 'lighting-color', 'local', 'marker-end', 'marker-mid', 'marker-start', 'markerheight', 'markerunits', 'markerwidth', 'maskcontentunits', 'maskunits', 'max', 'mask', 'media', 'method', 'mode', 'min', 'name', 'numoctaves', 'offset', 'operator', 'opacity', 'order', 'orient', 'orientation', 'origin', 'overflow', 'paint-order', 'path', 'pathlength', 'patterncontentunits', 'patterntransform', 'patternunits', 'points', 'preservealpha', 'preserveaspectratio', 'primitiveunits', 'r', 'rx', 'ry', 'radius', 'refx', 'refy', 'repeatcount', 'repeatdur', 'restart', 'result', 'rotate', 'scale', 'seed', 'shape-rendering', 'specularconstant', 'specularexponent', 'spreadmethod', 'startoffset', 'stddeviation', 'stitchtiles', 'stop-color', 'stop-opacity', 'stroke-dasharray', 'stroke-dashoffset', 'stroke-linecap', 'stroke-linejoin', 'stroke-miterlimit', 'stroke-opacity', 'stroke', 'stroke-width', 'style', 'surfacescale', 'systemlanguage', 'tabindex', 'targetx', 'targety', 'transform', 'transform-origin', 'text-anchor', 'text-decoration', 'text-rendering', 'textlength', 'type', 'u1', 'u2', 'unicode', 'values', 'viewbox', 'visibility', 'version', 'vert-adv-y', 'vert-origin-x', 'vert-origin-y', 'width', 'word-spacing', 'wrap', 'writing-mode', 'xchannelselector', 'ychannelselector', 'x', 'x1', 'x2', 'xmlns', 'y', 'y1', 'y2', 'z', 'zoomandpan']);
+  const mathMl = freeze(['accent', 'accentunder', 'align', 'bevelled', 'close', 'columnsalign', 'columnlines', 'columnspan', 'denomalign', 'depth', 'dir', 'display', 'displaystyle', 'encoding', 'fence', 'frame', 'height', 'href', 'id', 'largeop', 'length', 'linethickness', 'lspace', 'lquote', 'mathbackground', 'mathcolor', 'mathsize', 'mathvariant', 'maxsize', 'minsize', 'movablelimits', 'notation', 'numalign', 'open', 'rowalign', 'rowlines', 'rowspacing', 'rowspan', 'rspace', 'rquote', 'scriptlevel', 'scriptminsize', 'scriptsizemultiplier', 'selection', 'separator', 'separators', 'stretchy', 'subscriptshift', 'supscriptshift', 'symmetric', 'voffset', 'width', 'xmlns']);
+  const xml = freeze(['xlink:href', 'xml:id', 'xlink:title', 'xml:space', 'xmlns:xlink']);
+
+  const MUSTACHE_EXPR = seal(/\{\{[\w\W]*|[\w\W]*\}\}/gm); // Specify template detection regex for SAFE_FOR_TEMPLATES mode
+
+  const ERB_EXPR = seal(/<%[\w\W]*|[\w\W]*%>/gm);
+  const TMPLIT_EXPR = seal(/\${[\w\W]*}/gm);
+  const DATA_ATTR = seal(/^data-[\-\w.\u00B7-\uFFFF]/); // eslint-disable-line no-useless-escape
+
+  const ARIA_ATTR = seal(/^aria-[\-\w]+$/); // eslint-disable-line no-useless-escape
+
+  const IS_ALLOWED_URI = seal(/^(?:(?:(?:f|ht)tps?|mailto|tel|callto|sms|cid|xmpp):|[^a-z]|[a-z+.\-]+(?:[^a-z+.\-:]|$))/i // eslint-disable-line no-useless-escape
+  );
+  const IS_SCRIPT_OR_DATA = seal(/^(?:\w+script|data):/i);
+  const ATTR_WHITESPACE = seal(/[\u0000-\u0020\u00A0\u1680\u180E\u2000-\u2029\u205F\u3000]/g // eslint-disable-line no-control-regex
+  );
+  const DOCTYPE_NAME = seal(/^html$/i);
+
+  var EXPRESSIONS = /*#__PURE__*/Object.freeze({
+    __proto__: null,
+    MUSTACHE_EXPR: MUSTACHE_EXPR,
+    ERB_EXPR: ERB_EXPR,
+    TMPLIT_EXPR: TMPLIT_EXPR,
+    DATA_ATTR: DATA_ATTR,
+    ARIA_ATTR: ARIA_ATTR,
+    IS_ALLOWED_URI: IS_ALLOWED_URI,
+    IS_SCRIPT_OR_DATA: IS_SCRIPT_OR_DATA,
+    ATTR_WHITESPACE: ATTR_WHITESPACE,
+    DOCTYPE_NAME: DOCTYPE_NAME
+  });
+
+  const getGlobal = () => typeof window === 'undefined' ? null : window;
+  /**
+   * Creates a no-op policy for internal use only.
+   * Don't export this function outside this module!
+   * @param {?TrustedTypePolicyFactory} trustedTypes The policy factory.
+   * @param {Document} document The document object (to determine policy name suffix)
+   * @return {?TrustedTypePolicy} The policy created (or null, if Trusted Types
+   * are not supported).
+   */
+
+
+  const _createTrustedTypesPolicy = function _createTrustedTypesPolicy(trustedTypes, document) {
+    if (typeof trustedTypes !== 'object' || typeof trustedTypes.createPolicy !== 'function') {
+      return null;
+    } // Allow the callers to control the unique policy name
+    // by adding a data-tt-policy-suffix to the script element with the DOMPurify.
+    // Policy creation with duplicate names throws in Trusted Types.
+
+
+    let suffix = null;
+    const ATTR_NAME = 'data-tt-policy-suffix';
+
+    if (document.currentScript && document.currentScript.hasAttribute(ATTR_NAME)) {
+      suffix = document.currentScript.getAttribute(ATTR_NAME);
+    }
+
+    const policyName = 'dompurify' + (suffix ? '#' + suffix : '');
+
+    try {
+      return trustedTypes.createPolicy(policyName, {
+        createHTML(html) {
+          return html;
+        },
+
+        createScriptURL(scriptUrl) {
+          return scriptUrl;
+        }
+
+      });
+    } catch (_) {
+      // Policy creation failed (most likely another DOMPurify script has
+      // already run). Skip creating the policy, as this will only cause errors
+      // if TT are enforced.
+      console.warn('TrustedTypes policy ' + policyName + ' could not be created.');
+      return null;
+    }
+  };
+
+  function createDOMPurify() {
+    let window = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : getGlobal();
+
+    const DOMPurify = root => createDOMPurify(root);
+    /**
+     * Version label, exposed for easier checks
+     * if DOMPurify is up to date or not
+     */
+
+
+    DOMPurify.version = '3.0.2';
+    /**
+     * Array of elements that DOMPurify removed during sanitation.
+     * Empty if nothing was removed.
+     */
+
+    DOMPurify.removed = [];
+
+    if (!window || !window.document || window.document.nodeType !== 9) {
+      // Not running in a browser, provide a factory function
+      // so that you can pass your own Window
+      DOMPurify.isSupported = false;
+      return DOMPurify;
+    }
+
+    const originalDocument = window.document;
+    let {
+      document
+    } = window;
+    const {
+      DocumentFragment,
+      HTMLTemplateElement,
+      Node,
+      Element,
+      NodeFilter,
+      NamedNodeMap = window.NamedNodeMap || window.MozNamedAttrMap,
+      HTMLFormElement,
+      DOMParser,
+      trustedTypes
+    } = window;
+    const ElementPrototype = Element.prototype;
+    const cloneNode = lookupGetter(ElementPrototype, 'cloneNode');
+    const getNextSibling = lookupGetter(ElementPrototype, 'nextSibling');
+    const getChildNodes = lookupGetter(ElementPrototype, 'childNodes');
+    const getParentNode = lookupGetter(ElementPrototype, 'parentNode'); // As per issue #47, the web-components registry is inherited by a
+    // new document created via createHTMLDocument. As per the spec
+    // (http://w3c.github.io/webcomponents/spec/custom/#creating-and-passing-registries)
+    // a new empty registry is used when creating a template contents owner
+    // document, so we use that as our parent document to ensure nothing
+    // is inherited.
+
+    if (typeof HTMLTemplateElement === 'function') {
+      const template = document.createElement('template');
+
+      if (template.content && template.content.ownerDocument) {
+        document = template.content.ownerDocument;
+      }
+    }
+
+    const trustedTypesPolicy = _createTrustedTypesPolicy(trustedTypes, originalDocument);
+
+    const emptyHTML = trustedTypesPolicy ? trustedTypesPolicy.createHTML('') : '';
+    const {
+      implementation,
+      createNodeIterator,
+      createDocumentFragment,
+      getElementsByTagName
+    } = document;
+    const {
+      importNode
+    } = originalDocument;
+    let hooks = {};
+    /**
+     * Expose whether this browser supports running the full DOMPurify.
+     */
+
+    DOMPurify.isSupported = typeof entries === 'function' && typeof getParentNode === 'function' && implementation && typeof implementation.createHTMLDocument !== 'undefined';
+    const {
+      MUSTACHE_EXPR,
+      ERB_EXPR,
+      TMPLIT_EXPR,
+      DATA_ATTR,
+      ARIA_ATTR,
+      IS_SCRIPT_OR_DATA,
+      ATTR_WHITESPACE
+    } = EXPRESSIONS;
+    let {
+      IS_ALLOWED_URI: IS_ALLOWED_URI$1
+    } = EXPRESSIONS;
+    /**
+     * We consider the elements and attributes below to be safe. Ideally
+     * don't add any new ones but feel free to remove unwanted ones.
+     */
+
+    /* allowed element names */
+
+    let ALLOWED_TAGS = null;
+    const DEFAULT_ALLOWED_TAGS = addToSet({}, [...html$1, ...svg$1, ...svgFilters, ...mathMl$1, ...text]);
+    /* Allowed attribute names */
+
+    let ALLOWED_ATTR = null;
+    const DEFAULT_ALLOWED_ATTR = addToSet({}, [...html, ...svg, ...mathMl, ...xml]);
+    /*
+     * Configure how DOMPUrify should handle custom elements and their attributes as well as customized built-in elements.
+     * @property {RegExp|Function|null} tagNameCheck one of [null, regexPattern, predicate]. Default: `null` (disallow any custom elements)
+     * @property {RegExp|Function|null} attributeNameCheck one of [null, regexPattern, predicate]. Default: `null` (disallow any attributes not on the allow list)
+     * @property {boolean} allowCustomizedBuiltInElements allow custom elements derived from built-ins if they pass CUSTOM_ELEMENT_HANDLING.tagNameCheck. Default: `false`.
+     */
+
+    let CUSTOM_ELEMENT_HANDLING = Object.seal(Object.create(null, {
+      tagNameCheck: {
+        writable: true,
+        configurable: false,
+        enumerable: true,
+        value: null
+      },
+      attributeNameCheck: {
+        writable: true,
+        configurable: false,
+        enumerable: true,
+        value: null
+      },
+      allowCustomizedBuiltInElements: {
+        writable: true,
+        configurable: false,
+        enumerable: true,
+        value: false
+      }
+    }));
+    /* Explicitly forbidden tags (overrides ALLOWED_TAGS/ADD_TAGS) */
+
+    let FORBID_TAGS = null;
+    /* Explicitly forbidden attributes (overrides ALLOWED_ATTR/ADD_ATTR) */
+
+    let FORBID_ATTR = null;
+    /* Decide if ARIA attributes are okay */
+
+    let ALLOW_ARIA_ATTR = true;
+    /* Decide if custom data attributes are okay */
+
+    let ALLOW_DATA_ATTR = true;
+    /* Decide if unknown protocols are okay */
+
+    let ALLOW_UNKNOWN_PROTOCOLS = false;
+    /* Decide if self-closing tags in attributes are allowed.
+     * Usually removed due to a mXSS issue in jQuery 3.0 */
+
+    let ALLOW_SELF_CLOSE_IN_ATTR = true;
+    /* Output should be safe for common template engines.
+     * This means, DOMPurify removes data attributes, mustaches and ERB
+     */
+
+    let SAFE_FOR_TEMPLATES = false;
+    /* Decide if document with <html>... should be returned */
+
+    let WHOLE_DOCUMENT = false;
+    /* Track whether config is already set on this instance of DOMPurify. */
+
+    let SET_CONFIG = false;
+    /* Decide if all elements (e.g. style, script) must be children of
+     * document.body. By default, browsers might move them to document.head */
+
+    let FORCE_BODY = false;
+    /* Decide if a DOM `HTMLBodyElement` should be returned, instead of a html
+     * string (or a TrustedHTML object if Trusted Types are supported).
+     * If `WHOLE_DOCUMENT` is enabled a `HTMLHtmlElement` will be returned instead
+     */
+
+    let RETURN_DOM = false;
+    /* Decide if a DOM `DocumentFragment` should be returned, instead of a html
+     * string  (or a TrustedHTML object if Trusted Types are supported) */
+
+    let RETURN_DOM_FRAGMENT = false;
+    /* Try to return a Trusted Type object instead of a string, return a string in
+     * case Trusted Types are not supported  */
+
+    let RETURN_TRUSTED_TYPE = false;
+    /* Output should be free from DOM clobbering attacks?
+     * This sanitizes markups named with colliding, clobberable built-in DOM APIs.
+     */
+
+    let SANITIZE_DOM = true;
+    /* Achieve full DOM Clobbering protection by isolating the namespace of named
+     * properties and JS variables, mitigating attacks that abuse the HTML/DOM spec rules.
+     *
+     * HTML/DOM spec rules that enable DOM Clobbering:
+     *   - Named Access on Window (§7.3.3)
+     *   - DOM Tree Accessors (§3.1.5)
+     *   - Form Element Parent-Child Relations (§4.10.3)
+     *   - Iframe srcdoc / Nested WindowProxies (§4.8.5)
+     *   - HTMLCollection (§4.2.10.2)
+     *
+     * Namespace isolation is implemented by prefixing `id` and `name` attributes
+     * with a constant string, i.e., `user-content-`
+     */
+
+    let SANITIZE_NAMED_PROPS = false;
+    const SANITIZE_NAMED_PROPS_PREFIX = 'user-content-';
+    /* Keep element content when removing element? */
+
+    let KEEP_CONTENT = true;
+    /* If a `Node` is passed to sanitize(), then performs sanitization in-place instead
+     * of importing it into a new Document and returning a sanitized copy */
+
+    let IN_PLACE = false;
+    /* Allow usage of profiles like html, svg and mathMl */
+
+    let USE_PROFILES = {};
+    /* Tags to ignore content of when KEEP_CONTENT is true */
+
+    let FORBID_CONTENTS = null;
+    const DEFAULT_FORBID_CONTENTS = addToSet({}, ['annotation-xml', 'audio', 'colgroup', 'desc', 'foreignobject', 'head', 'iframe', 'math', 'mi', 'mn', 'mo', 'ms', 'mtext', 'noembed', 'noframes', 'noscript', 'plaintext', 'script', 'style', 'svg', 'template', 'thead', 'title', 'video', 'xmp']);
+    /* Tags that are safe for data: URIs */
+
+    let DATA_URI_TAGS = null;
+    const DEFAULT_DATA_URI_TAGS = addToSet({}, ['audio', 'video', 'img', 'source', 'image', 'track']);
+    /* Attributes safe for values like "javascript:" */
+
+    let URI_SAFE_ATTRIBUTES = null;
+    const DEFAULT_URI_SAFE_ATTRIBUTES = addToSet({}, ['alt', 'class', 'for', 'id', 'label', 'name', 'pattern', 'placeholder', 'role', 'summary', 'title', 'value', 'style', 'xmlns']);
+    const MATHML_NAMESPACE = 'http://www.w3.org/1998/Math/MathML';
+    const SVG_NAMESPACE = 'http://www.w3.org/2000/svg';
+    const HTML_NAMESPACE = 'http://www.w3.org/1999/xhtml';
+    /* Document namespace */
+
+    let NAMESPACE = HTML_NAMESPACE;
+    let IS_EMPTY_INPUT = false;
+    /* Allowed XHTML+XML namespaces */
+
+    let ALLOWED_NAMESPACES = null;
+    const DEFAULT_ALLOWED_NAMESPACES = addToSet({}, [MATHML_NAMESPACE, SVG_NAMESPACE, HTML_NAMESPACE], stringToString);
+    /* Parsing of strict XHTML documents */
+
+    let PARSER_MEDIA_TYPE;
+    const SUPPORTED_PARSER_MEDIA_TYPES = ['application/xhtml+xml', 'text/html'];
+    const DEFAULT_PARSER_MEDIA_TYPE = 'text/html';
+    let transformCaseFunc;
+    /* Keep a reference to config to pass to hooks */
+
+    let CONFIG = null;
+    /* Ideally, do not touch anything below this line */
+
+    /* ______________________________________________ */
+
+    const formElement = document.createElement('form');
+
+    const isRegexOrFunction = function isRegexOrFunction(testValue) {
+      return testValue instanceof RegExp || testValue instanceof Function;
+    };
+    /**
+     * _parseConfig
+     *
+     * @param  {Object} cfg optional config literal
+     */
+    // eslint-disable-next-line complexity
+
+
+    const _parseConfig = function _parseConfig(cfg) {
+      if (CONFIG && CONFIG === cfg) {
+        return;
+      }
+      /* Shield configuration object from tampering */
+
+
+      if (!cfg || typeof cfg !== 'object') {
+        cfg = {};
+      }
+      /* Shield configuration object from prototype pollution */
+
+
+      cfg = clone(cfg);
+      PARSER_MEDIA_TYPE = // eslint-disable-next-line unicorn/prefer-includes
+      SUPPORTED_PARSER_MEDIA_TYPES.indexOf(cfg.PARSER_MEDIA_TYPE) === -1 ? PARSER_MEDIA_TYPE = DEFAULT_PARSER_MEDIA_TYPE : PARSER_MEDIA_TYPE = cfg.PARSER_MEDIA_TYPE; // HTML tags and attributes are not case-sensitive, converting to lowercase. Keeping XHTML as is.
+
+      transformCaseFunc = PARSER_MEDIA_TYPE === 'application/xhtml+xml' ? stringToString : stringToLowerCase;
+      /* Set configuration parameters */
+
+      ALLOWED_TAGS = 'ALLOWED_TAGS' in cfg ? addToSet({}, cfg.ALLOWED_TAGS, transformCaseFunc) : DEFAULT_ALLOWED_TAGS;
+      ALLOWED_ATTR = 'ALLOWED_ATTR' in cfg ? addToSet({}, cfg.ALLOWED_ATTR, transformCaseFunc) : DEFAULT_ALLOWED_ATTR;
+      ALLOWED_NAMESPACES = 'ALLOWED_NAMESPACES' in cfg ? addToSet({}, cfg.ALLOWED_NAMESPACES, stringToString) : DEFAULT_ALLOWED_NAMESPACES;
+      URI_SAFE_ATTRIBUTES = 'ADD_URI_SAFE_ATTR' in cfg ? addToSet(clone(DEFAULT_URI_SAFE_ATTRIBUTES), // eslint-disable-line indent
+      cfg.ADD_URI_SAFE_ATTR, // eslint-disable-line indent
+      transformCaseFunc // eslint-disable-line indent
+      ) // eslint-disable-line indent
+      : DEFAULT_URI_SAFE_ATTRIBUTES;
+      DATA_URI_TAGS = 'ADD_DATA_URI_TAGS' in cfg ? addToSet(clone(DEFAULT_DATA_URI_TAGS), // eslint-disable-line indent
+      cfg.ADD_DATA_URI_TAGS, // eslint-disable-line indent
+      transformCaseFunc // eslint-disable-line indent
+      ) // eslint-disable-line indent
+      : DEFAULT_DATA_URI_TAGS;
+      FORBID_CONTENTS = 'FORBID_CONTENTS' in cfg ? addToSet({}, cfg.FORBID_CONTENTS, transformCaseFunc) : DEFAULT_FORBID_CONTENTS;
+      FORBID_TAGS = 'FORBID_TAGS' in cfg ? addToSet({}, cfg.FORBID_TAGS, transformCaseFunc) : {};
+      FORBID_ATTR = 'FORBID_ATTR' in cfg ? addToSet({}, cfg.FORBID_ATTR, transformCaseFunc) : {};
+      USE_PROFILES = 'USE_PROFILES' in cfg ? cfg.USE_PROFILES : false;
+      ALLOW_ARIA_ATTR = cfg.ALLOW_ARIA_ATTR !== false; // Default true
+
+      ALLOW_DATA_ATTR = cfg.ALLOW_DATA_ATTR !== false; // Default true
+
+      ALLOW_UNKNOWN_PROTOCOLS = cfg.ALLOW_UNKNOWN_PROTOCOLS || false; // Default false
+
+      ALLOW_SELF_CLOSE_IN_ATTR = cfg.ALLOW_SELF_CLOSE_IN_ATTR !== false; // Default true
+
+      SAFE_FOR_TEMPLATES = cfg.SAFE_FOR_TEMPLATES || false; // Default false
+
+      WHOLE_DOCUMENT = cfg.WHOLE_DOCUMENT || false; // Default false
+
+      RETURN_DOM = cfg.RETURN_DOM || false; // Default false
+
+      RETURN_DOM_FRAGMENT = cfg.RETURN_DOM_FRAGMENT || false; // Default false
+
+      RETURN_TRUSTED_TYPE = cfg.RETURN_TRUSTED_TYPE || false; // Default false
+
+      FORCE_BODY = cfg.FORCE_BODY || false; // Default false
+
+      SANITIZE_DOM = cfg.SANITIZE_DOM !== false; // Default true
+
+      SANITIZE_NAMED_PROPS = cfg.SANITIZE_NAMED_PROPS || false; // Default false
+
+      KEEP_CONTENT = cfg.KEEP_CONTENT !== false; // Default true
+
+      IN_PLACE = cfg.IN_PLACE || false; // Default false
+
+      IS_ALLOWED_URI$1 = cfg.ALLOWED_URI_REGEXP || IS_ALLOWED_URI;
+      NAMESPACE = cfg.NAMESPACE || HTML_NAMESPACE;
+      CUSTOM_ELEMENT_HANDLING = cfg.CUSTOM_ELEMENT_HANDLING || {};
+
+      if (cfg.CUSTOM_ELEMENT_HANDLING && isRegexOrFunction(cfg.CUSTOM_ELEMENT_HANDLING.tagNameCheck)) {
+        CUSTOM_ELEMENT_HANDLING.tagNameCheck = cfg.CUSTOM_ELEMENT_HANDLING.tagNameCheck;
+      }
+
+      if (cfg.CUSTOM_ELEMENT_HANDLING && isRegexOrFunction(cfg.CUSTOM_ELEMENT_HANDLING.attributeNameCheck)) {
+        CUSTOM_ELEMENT_HANDLING.attributeNameCheck = cfg.CUSTOM_ELEMENT_HANDLING.attributeNameCheck;
+      }
+
+      if (cfg.CUSTOM_ELEMENT_HANDLING && typeof cfg.CUSTOM_ELEMENT_HANDLING.allowCustomizedBuiltInElements === 'boolean') {
+        CUSTOM_ELEMENT_HANDLING.allowCustomizedBuiltInElements = cfg.CUSTOM_ELEMENT_HANDLING.allowCustomizedBuiltInElements;
+      }
+
+      if (SAFE_FOR_TEMPLATES) {
+        ALLOW_DATA_ATTR = false;
+      }
+
+      if (RETURN_DOM_FRAGMENT) {
+        RETURN_DOM = true;
+      }
+      /* Parse profile info */
+
+
+      if (USE_PROFILES) {
+        ALLOWED_TAGS = addToSet({}, [...text]);
+        ALLOWED_ATTR = [];
+
+        if (USE_PROFILES.html === true) {
+          addToSet(ALLOWED_TAGS, html$1);
+          addToSet(ALLOWED_ATTR, html);
+        }
+
+        if (USE_PROFILES.svg === true) {
+          addToSet(ALLOWED_TAGS, svg$1);
+          addToSet(ALLOWED_ATTR, svg);
+          addToSet(ALLOWED_ATTR, xml);
+        }
+
+        if (USE_PROFILES.svgFilters === true) {
+          addToSet(ALLOWED_TAGS, svgFilters);
+          addToSet(ALLOWED_ATTR, svg);
+          addToSet(ALLOWED_ATTR, xml);
+        }
+
+        if (USE_PROFILES.mathMl === true) {
+          addToSet(ALLOWED_TAGS, mathMl$1);
+          addToSet(ALLOWED_ATTR, mathMl);
+          addToSet(ALLOWED_ATTR, xml);
+        }
+      }
+      /* Merge configuration parameters */
+
+
+      if (cfg.ADD_TAGS) {
+        if (ALLOWED_TAGS === DEFAULT_ALLOWED_TAGS) {
+          ALLOWED_TAGS = clone(ALLOWED_TAGS);
+        }
+
+        addToSet(ALLOWED_TAGS, cfg.ADD_TAGS, transformCaseFunc);
+      }
+
+      if (cfg.ADD_ATTR) {
+        if (ALLOWED_ATTR === DEFAULT_ALLOWED_ATTR) {
+          ALLOWED_ATTR = clone(ALLOWED_ATTR);
+        }
+
+        addToSet(ALLOWED_ATTR, cfg.ADD_ATTR, transformCaseFunc);
+      }
+
+      if (cfg.ADD_URI_SAFE_ATTR) {
+        addToSet(URI_SAFE_ATTRIBUTES, cfg.ADD_URI_SAFE_ATTR, transformCaseFunc);
+      }
+
+      if (cfg.FORBID_CONTENTS) {
+        if (FORBID_CONTENTS === DEFAULT_FORBID_CONTENTS) {
+          FORBID_CONTENTS = clone(FORBID_CONTENTS);
+        }
+
+        addToSet(FORBID_CONTENTS, cfg.FORBID_CONTENTS, transformCaseFunc);
+      }
+      /* Add #text in case KEEP_CONTENT is set to true */
+
+
+      if (KEEP_CONTENT) {
+        ALLOWED_TAGS['#text'] = true;
+      }
+      /* Add html, head and body to ALLOWED_TAGS in case WHOLE_DOCUMENT is true */
+
+
+      if (WHOLE_DOCUMENT) {
+        addToSet(ALLOWED_TAGS, ['html', 'head', 'body']);
+      }
+      /* Add tbody to ALLOWED_TAGS in case tables are permitted, see #286, #365 */
+
+
+      if (ALLOWED_TAGS.table) {
+        addToSet(ALLOWED_TAGS, ['tbody']);
+        delete FORBID_TAGS.tbody;
+      } // Prevent further manipulation of configuration.
+      // Not available in IE8, Safari 5, etc.
+
+
+      if (freeze) {
+        freeze(cfg);
+      }
+
+      CONFIG = cfg;
+    };
+
+    const MATHML_TEXT_INTEGRATION_POINTS = addToSet({}, ['mi', 'mo', 'mn', 'ms', 'mtext']);
+    const HTML_INTEGRATION_POINTS = addToSet({}, ['foreignobject', 'desc', 'title', 'annotation-xml']); // Certain elements are allowed in both SVG and HTML
+    // namespace. We need to specify them explicitly
+    // so that they don't get erroneously deleted from
+    // HTML namespace.
+
+    const COMMON_SVG_AND_HTML_ELEMENTS = addToSet({}, ['title', 'style', 'font', 'a', 'script']);
+    /* Keep track of all possible SVG and MathML tags
+     * so that we can perform the namespace checks
+     * correctly. */
+
+    const ALL_SVG_TAGS = addToSet({}, svg$1);
+    addToSet(ALL_SVG_TAGS, svgFilters);
+    addToSet(ALL_SVG_TAGS, svgDisallowed);
+    const ALL_MATHML_TAGS = addToSet({}, mathMl$1);
+    addToSet(ALL_MATHML_TAGS, mathMlDisallowed);
+    /**
+     *
+     *
+     * @param  {Element} element a DOM element whose namespace is being checked
+     * @returns {boolean} Return false if the element has a
+     *  namespace that a spec-compliant parser would never
+     *  return. Return true otherwise.
+     */
+
+    const _checkValidNamespace = function _checkValidNamespace(element) {
+      let parent = getParentNode(element); // In JSDOM, if we're inside shadow DOM, then parentNode
+      // can be null. We just simulate parent in this case.
+
+      if (!parent || !parent.tagName) {
+        parent = {
+          namespaceURI: NAMESPACE,
+          tagName: 'template'
+        };
+      }
+
+      const tagName = stringToLowerCase(element.tagName);
+      const parentTagName = stringToLowerCase(parent.tagName);
+
+      if (!ALLOWED_NAMESPACES[element.namespaceURI]) {
+        return false;
+      }
+
+      if (element.namespaceURI === SVG_NAMESPACE) {
+        // The only way to switch from HTML namespace to SVG
+        // is via <svg>. If it happens via any other tag, then
+        // it should be killed.
+        if (parent.namespaceURI === HTML_NAMESPACE) {
+          return tagName === 'svg';
+        } // The only way to switch from MathML to SVG is via`
+        // svg if parent is either <annotation-xml> or MathML
+        // text integration points.
+
+
+        if (parent.namespaceURI === MATHML_NAMESPACE) {
+          return tagName === 'svg' && (parentTagName === 'annotation-xml' || MATHML_TEXT_INTEGRATION_POINTS[parentTagName]);
+        } // We only allow elements that are defined in SVG
+        // spec. All others are disallowed in SVG namespace.
+
+
+        return Boolean(ALL_SVG_TAGS[tagName]);
+      }
+
+      if (element.namespaceURI === MATHML_NAMESPACE) {
+        // The only way to switch from HTML namespace to MathML
+        // is via <math>. If it happens via any other tag, then
+        // it should be killed.
+        if (parent.namespaceURI === HTML_NAMESPACE) {
+          return tagName === 'math';
+        } // The only way to switch from SVG to MathML is via
+        // <math> and HTML integration points
+
+
+        if (parent.namespaceURI === SVG_NAMESPACE) {
+          return tagName === 'math' && HTML_INTEGRATION_POINTS[parentTagName];
+        } // We only allow elements that are defined in MathML
+        // spec. All others are disallowed in MathML namespace.
+
+
+        return Boolean(ALL_MATHML_TAGS[tagName]);
+      }
+
+      if (element.namespaceURI === HTML_NAMESPACE) {
+        // The only way to switch from SVG to HTML is via
+        // HTML integration points, and from MathML to HTML
+        // is via MathML text integration points
+        if (parent.namespaceURI === SVG_NAMESPACE && !HTML_INTEGRATION_POINTS[parentTagName]) {
+          return false;
+        }
+
+        if (parent.namespaceURI === MATHML_NAMESPACE && !MATHML_TEXT_INTEGRATION_POINTS[parentTagName]) {
+          return false;
+        } // We disallow tags that are specific for MathML
+        // or SVG and should never appear in HTML namespace
+
+
+        return !ALL_MATHML_TAGS[tagName] && (COMMON_SVG_AND_HTML_ELEMENTS[tagName] || !ALL_SVG_TAGS[tagName]);
+      } // For XHTML and XML documents that support custom namespaces
+
+
+      if (PARSER_MEDIA_TYPE === 'application/xhtml+xml' && ALLOWED_NAMESPACES[element.namespaceURI]) {
+        return true;
+      } // The code should never reach this place (this means
+      // that the element somehow got namespace that is not
+      // HTML, SVG, MathML or allowed via ALLOWED_NAMESPACES).
+      // Return false just in case.
+
+
+      return false;
+    };
+    /**
+     * _forceRemove
+     *
+     * @param  {Node} node a DOM node
+     */
+
+
+    const _forceRemove = function _forceRemove(node) {
+      arrayPush(DOMPurify.removed, {
+        element: node
+      });
+
+      try {
+        // eslint-disable-next-line unicorn/prefer-dom-node-remove
+        node.parentNode.removeChild(node);
+      } catch (_) {
+        node.remove();
+      }
+    };
+    /**
+     * _removeAttribute
+     *
+     * @param  {String} name an Attribute name
+     * @param  {Node} node a DOM node
+     */
+
+
+    const _removeAttribute = function _removeAttribute(name, node) {
+      try {
+        arrayPush(DOMPurify.removed, {
+          attribute: node.getAttributeNode(name),
+          from: node
+        });
+      } catch (_) {
+        arrayPush(DOMPurify.removed, {
+          attribute: null,
+          from: node
+        });
+      }
+
+      node.removeAttribute(name); // We void attribute values for unremovable "is"" attributes
+
+      if (name === 'is' && !ALLOWED_ATTR[name]) {
+        if (RETURN_DOM || RETURN_DOM_FRAGMENT) {
+          try {
+            _forceRemove(node);
+          } catch (_) {}
+        } else {
+          try {
+            node.setAttribute(name, '');
+          } catch (_) {}
+        }
+      }
+    };
+    /**
+     * _initDocument
+     *
+     * @param  {String} dirty a string of dirty markup
+     * @return {Document} a DOM, filled with the dirty markup
+     */
+
+
+    const _initDocument = function _initDocument(dirty) {
+      /* Create a HTML document */
+      let doc;
+      let leadingWhitespace;
+
+      if (FORCE_BODY) {
+        dirty = '<remove></remove>' + dirty;
+      } else {
+        /* If FORCE_BODY isn't used, leading whitespace needs to be preserved manually */
+        const matches = stringMatch(dirty, /^[\r\n\t ]+/);
+        leadingWhitespace = matches && matches[0];
+      }
+
+      if (PARSER_MEDIA_TYPE === 'application/xhtml+xml' && NAMESPACE === HTML_NAMESPACE) {
+        // Root of XHTML doc must contain xmlns declaration (see https://www.w3.org/TR/xhtml1/normative.html#strict)
+        dirty = '<html xmlns="http://www.w3.org/1999/xhtml"><head></head><body>' + dirty + '</body></html>';
+      }
+
+      const dirtyPayload = trustedTypesPolicy ? trustedTypesPolicy.createHTML(dirty) : dirty;
+      /*
+       * Use the DOMParser API by default, fallback later if needs be
+       * DOMParser not work for svg when has multiple root element.
+       */
+
+      if (NAMESPACE === HTML_NAMESPACE) {
+        try {
+          doc = new DOMParser().parseFromString(dirtyPayload, PARSER_MEDIA_TYPE);
+        } catch (_) {}
+      }
+      /* Use createHTMLDocument in case DOMParser is not available */
+
+
+      if (!doc || !doc.documentElement) {
+        doc = implementation.createDocument(NAMESPACE, 'template', null);
+
+        try {
+          doc.documentElement.innerHTML = IS_EMPTY_INPUT ? emptyHTML : dirtyPayload;
+        } catch (_) {// Syntax error if dirtyPayload is invalid xml
+        }
+      }
+
+      const body = doc.body || doc.documentElement;
+
+      if (dirty && leadingWhitespace) {
+        body.insertBefore(document.createTextNode(leadingWhitespace), body.childNodes[0] || null);
+      }
+      /* Work on whole document or just its body */
+
+
+      if (NAMESPACE === HTML_NAMESPACE) {
+        return getElementsByTagName.call(doc, WHOLE_DOCUMENT ? 'html' : 'body')[0];
+      }
+
+      return WHOLE_DOCUMENT ? doc.documentElement : body;
+    };
+    /**
+     * _createIterator
+     *
+     * @param  {Document} root document/fragment to create iterator for
+     * @return {Iterator} iterator instance
+     */
+
+
+    const _createIterator = function _createIterator(root) {
+      return createNodeIterator.call(root.ownerDocument || root, root, // eslint-disable-next-line no-bitwise
+      NodeFilter.SHOW_ELEMENT | NodeFilter.SHOW_COMMENT | NodeFilter.SHOW_TEXT, null, false);
+    };
+    /**
+     * _isClobbered
+     *
+     * @param  {Node} elm element to check for clobbering attacks
+     * @return {Boolean} true if clobbered, false if safe
+     */
+
+
+    const _isClobbered = function _isClobbered(elm) {
+      return elm instanceof HTMLFormElement && (typeof elm.nodeName !== 'string' || typeof elm.textContent !== 'string' || typeof elm.removeChild !== 'function' || !(elm.attributes instanceof NamedNodeMap) || typeof elm.removeAttribute !== 'function' || typeof elm.setAttribute !== 'function' || typeof elm.namespaceURI !== 'string' || typeof elm.insertBefore !== 'function' || typeof elm.hasChildNodes !== 'function');
+    };
+    /**
+     * _isNode
+     *
+     * @param  {Node} obj object to check whether it's a DOM node
+     * @return {Boolean} true is object is a DOM node
+     */
+
+
+    const _isNode = function _isNode(object) {
+      return typeof Node === 'object' ? object instanceof Node : object && typeof object === 'object' && typeof object.nodeType === 'number' && typeof object.nodeName === 'string';
+    };
+    /**
+     * _executeHook
+     * Execute user configurable hooks
+     *
+     * @param  {String} entryPoint  Name of the hook's entry point
+     * @param  {Node} currentNode node to work on with the hook
+     * @param  {Object} data additional hook parameters
+     */
+
+
+    const _executeHook = function _executeHook(entryPoint, currentNode, data) {
+      if (!hooks[entryPoint]) {
+        return;
+      }
+
+      arrayForEach(hooks[entryPoint], hook => {
+        hook.call(DOMPurify, currentNode, data, CONFIG);
+      });
+    };
+    /**
+     * _sanitizeElements
+     *
+     * @protect nodeName
+     * @protect textContent
+     * @protect removeChild
+     *
+     * @param   {Node} currentNode to check for permission to exist
+     * @return  {Boolean} true if node was killed, false if left alive
+     */
+
+
+    const _sanitizeElements = function _sanitizeElements(currentNode) {
+      let content;
+      /* Execute a hook if present */
+
+      _executeHook('beforeSanitizeElements', currentNode, null);
+      /* Check if element is clobbered or can clobber */
+
+
+      if (_isClobbered(currentNode)) {
+        _forceRemove(currentNode);
+
+        return true;
+      }
+      /* Now let's check the element's type and name */
+
+
+      const tagName = transformCaseFunc(currentNode.nodeName);
+      /* Execute a hook if present */
+
+      _executeHook('uponSanitizeElement', currentNode, {
+        tagName,
+        allowedTags: ALLOWED_TAGS
+      });
+      /* Detect mXSS attempts abusing namespace confusion */
+
+
+      if (currentNode.hasChildNodes() && !_isNode(currentNode.firstElementChild) && (!_isNode(currentNode.content) || !_isNode(currentNode.content.firstElementChild)) && regExpTest(/<[/\w]/g, currentNode.innerHTML) && regExpTest(/<[/\w]/g, currentNode.textContent)) {
+        _forceRemove(currentNode);
+
+        return true;
+      }
+      /* Remove element if anything forbids its presence */
+
+
+      if (!ALLOWED_TAGS[tagName] || FORBID_TAGS[tagName]) {
+        /* Check if we have a custom element to handle */
+        if (!FORBID_TAGS[tagName] && _basicCustomElementTest(tagName)) {
+          if (CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof RegExp && regExpTest(CUSTOM_ELEMENT_HANDLING.tagNameCheck, tagName)) return false;
+          if (CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof Function && CUSTOM_ELEMENT_HANDLING.tagNameCheck(tagName)) return false;
+        }
+        /* Keep content except for bad-listed elements */
+
+
+        if (KEEP_CONTENT && !FORBID_CONTENTS[tagName]) {
+          const parentNode = getParentNode(currentNode) || currentNode.parentNode;
+          const childNodes = getChildNodes(currentNode) || currentNode.childNodes;
+
+          if (childNodes && parentNode) {
+            const childCount = childNodes.length;
+
+            for (let i = childCount - 1; i >= 0; --i) {
+              parentNode.insertBefore(cloneNode(childNodes[i], true), getNextSibling(currentNode));
+            }
+          }
+        }
+
+        _forceRemove(currentNode);
+
+        return true;
+      }
+      /* Check whether element has a valid namespace */
+
+
+      if (currentNode instanceof Element && !_checkValidNamespace(currentNode)) {
+        _forceRemove(currentNode);
+
+        return true;
+      }
+      /* Make sure that older browsers don't get noscript mXSS */
+
+
+      if ((tagName === 'noscript' || tagName === 'noembed') && regExpTest(/<\/no(script|embed)/i, currentNode.innerHTML)) {
+        _forceRemove(currentNode);
+
+        return true;
+      }
+      /* Sanitize element content to be template-safe */
+
+
+      if (SAFE_FOR_TEMPLATES && currentNode.nodeType === 3) {
+        /* Get the element's text content */
+        content = currentNode.textContent;
+        content = stringReplace(content, MUSTACHE_EXPR, ' ');
+        content = stringReplace(content, ERB_EXPR, ' ');
+        content = stringReplace(content, TMPLIT_EXPR, ' ');
+
+        if (currentNode.textContent !== content) {
+          arrayPush(DOMPurify.removed, {
+            element: currentNode.cloneNode()
+          });
+          currentNode.textContent = content;
+        }
+      }
+      /* Execute a hook if present */
+
+
+      _executeHook('afterSanitizeElements', currentNode, null);
+
+      return false;
+    };
+    /**
+     * _isValidAttribute
+     *
+     * @param  {string} lcTag Lowercase tag name of containing element.
+     * @param  {string} lcName Lowercase attribute name.
+     * @param  {string} value Attribute value.
+     * @return {Boolean} Returns true if `value` is valid, otherwise false.
+     */
+    // eslint-disable-next-line complexity
+
+
+    const _isValidAttribute = function _isValidAttribute(lcTag, lcName, value) {
+      /* Make sure attribute cannot clobber */
+      if (SANITIZE_DOM && (lcName === 'id' || lcName === 'name') && (value in document || value in formElement)) {
+        return false;
+      }
+      /* Allow valid data-* attributes: At least one character after "-"
+          (https://html.spec.whatwg.org/multipage/dom.html#embedding-custom-non-visible-data-with-the-data-*-attributes)
+          XML-compatible (https://html.spec.whatwg.org/multipage/infrastructure.html#xml-compatible and http://www.w3.org/TR/xml/#d0e804)
+          We don't need to check the value; it's always URI safe. */
+
+
+      if (ALLOW_DATA_ATTR && !FORBID_ATTR[lcName] && regExpTest(DATA_ATTR, lcName)) ; else if (ALLOW_ARIA_ATTR && regExpTest(ARIA_ATTR, lcName)) ; else if (!ALLOWED_ATTR[lcName] || FORBID_ATTR[lcName]) {
+        if ( // First condition does a very basic check if a) it's basically a valid custom element tagname AND
+        // b) if the tagName passes whatever the user has configured for CUSTOM_ELEMENT_HANDLING.tagNameCheck
+        // and c) if the attribute name passes whatever the user has configured for CUSTOM_ELEMENT_HANDLING.attributeNameCheck
+        _basicCustomElementTest(lcTag) && (CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof RegExp && regExpTest(CUSTOM_ELEMENT_HANDLING.tagNameCheck, lcTag) || CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof Function && CUSTOM_ELEMENT_HANDLING.tagNameCheck(lcTag)) && (CUSTOM_ELEMENT_HANDLING.attributeNameCheck instanceof RegExp && regExpTest(CUSTOM_ELEMENT_HANDLING.attributeNameCheck, lcName) || CUSTOM_ELEMENT_HANDLING.attributeNameCheck instanceof Function && CUSTOM_ELEMENT_HANDLING.attributeNameCheck(lcName)) || // Alternative, second condition checks if it's an `is`-attribute, AND
+        // the value passes whatever the user has configured for CUSTOM_ELEMENT_HANDLING.tagNameCheck
+        lcName === 'is' && CUSTOM_ELEMENT_HANDLING.allowCustomizedBuiltInElements && (CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof RegExp && regExpTest(CUSTOM_ELEMENT_HANDLING.tagNameCheck, value) || CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof Function && CUSTOM_ELEMENT_HANDLING.tagNameCheck(value))) ; else {
+          return false;
+        }
+        /* Check value is safe. First, is attr inert? If so, is safe */
+
+      } else if (URI_SAFE_ATTRIBUTES[lcName]) ; else if (regExpTest(IS_ALLOWED_URI$1, stringReplace(value, ATTR_WHITESPACE, ''))) ; else if ((lcName === 'src' || lcName === 'xlink:href' || lcName === 'href') && lcTag !== 'script' && stringIndexOf(value, 'data:') === 0 && DATA_URI_TAGS[lcTag]) ; else if (ALLOW_UNKNOWN_PROTOCOLS && !regExpTest(IS_SCRIPT_OR_DATA, stringReplace(value, ATTR_WHITESPACE, ''))) ; else if (!value) ; else {
+        return false;
+      }
+
+      return true;
+    };
+    /**
+     * _basicCustomElementCheck
+     * checks if at least one dash is included in tagName, and it's not the first char
+     * for more sophisticated checking see https://github.com/sindresorhus/validate-element-name
+     * @param {string} tagName name of the tag of the node to sanitize
+     */
+
+
+    const _basicCustomElementTest = function _basicCustomElementTest(tagName) {
+      return tagName.indexOf('-') > 0;
+    };
+    /**
+     * _sanitizeAttributes
+     *
+     * @protect attributes
+     * @protect nodeName
+     * @protect removeAttribute
+     * @protect setAttribute
+     *
+     * @param  {Node} currentNode to sanitize
+     */
+
+
+    const _sanitizeAttributes = function _sanitizeAttributes(currentNode) {
+      let attr;
+      let value;
+      let lcName;
+      let l;
+      /* Execute a hook if present */
+
+      _executeHook('beforeSanitizeAttributes', currentNode, null);
+
+      const {
+        attributes
+      } = currentNode;
+      /* Check if we have attributes; if not we might have a text node */
+
+      if (!attributes) {
+        return;
+      }
+
+      const hookEvent = {
+        attrName: '',
+        attrValue: '',
+        keepAttr: true,
+        allowedAttributes: ALLOWED_ATTR
+      };
+      l = attributes.length;
+      /* Go backwards over all attributes; safely remove bad ones */
+
+      while (l--) {
+        attr = attributes[l];
+        const {
+          name,
+          namespaceURI
+        } = attr;
+        value = name === 'value' ? attr.value : stringTrim(attr.value);
+        lcName = transformCaseFunc(name);
+        /* Execute a hook if present */
+
+        hookEvent.attrName = lcName;
+        hookEvent.attrValue = value;
+        hookEvent.keepAttr = true;
+        hookEvent.forceKeepAttr = undefined; // Allows developers to see this is a property they can set
+
+        _executeHook('uponSanitizeAttribute', currentNode, hookEvent);
+
+        value = hookEvent.attrValue;
+        /* Did the hooks approve of the attribute? */
+
+        if (hookEvent.forceKeepAttr) {
+          continue;
+        }
+        /* Remove attribute */
+
+
+        _removeAttribute(name, currentNode);
+        /* Did the hooks approve of the attribute? */
+
+
+        if (!hookEvent.keepAttr) {
+          continue;
+        }
+        /* Work around a security issue in jQuery 3.0 */
+
+
+        if (!ALLOW_SELF_CLOSE_IN_ATTR && regExpTest(/\/>/i, value)) {
+          _removeAttribute(name, currentNode);
+
+          continue;
+        }
+        /* Sanitize attribute content to be template-safe */
+
+
+        if (SAFE_FOR_TEMPLATES) {
+          value = stringReplace(value, MUSTACHE_EXPR, ' ');
+          value = stringReplace(value, ERB_EXPR, ' ');
+          value = stringReplace(value, TMPLIT_EXPR, ' ');
+        }
+        /* Is `value` valid for this attribute? */
+
+
+        const lcTag = transformCaseFunc(currentNode.nodeName);
+
+        if (!_isValidAttribute(lcTag, lcName, value)) {
+          continue;
+        }
+        /* Full DOM Clobbering protection via namespace isolation,
+         * Prefix id and name attributes with `user-content-`
+         */
+
+
+        if (SANITIZE_NAMED_PROPS && (lcName === 'id' || lcName === 'name')) {
+          // Remove the attribute with this value
+          _removeAttribute(name, currentNode); // Prefix the value and later re-create the attribute with the sanitized value
+
+
+          value = SANITIZE_NAMED_PROPS_PREFIX + value;
+        }
+        /* Handle attributes that require Trusted Types */
+
+
+        if (trustedTypesPolicy && typeof trustedTypes === 'object' && typeof trustedTypes.getAttributeType === 'function') {
+          if (namespaceURI) ; else {
+            switch (trustedTypes.getAttributeType(lcTag, lcName)) {
+              case 'TrustedHTML':
+                value = trustedTypesPolicy.createHTML(value);
+                break;
+
+              case 'TrustedScriptURL':
+                value = trustedTypesPolicy.createScriptURL(value);
+                break;
+            }
+          }
+        }
+        /* Handle invalid data-* attribute set by try-catching it */
+
+
+        try {
+          if (namespaceURI) {
+            currentNode.setAttributeNS(namespaceURI, name, value);
+          } else {
+            /* Fallback to setAttribute() for browser-unrecognized namespaces e.g. "x-schema". */
+            currentNode.setAttribute(name, value);
+          }
+
+          arrayPop(DOMPurify.removed);
+        } catch (_) {}
+      }
+      /* Execute a hook if present */
+
+
+      _executeHook('afterSanitizeAttributes', currentNode, null);
+    };
+    /**
+     * _sanitizeShadowDOM
+     *
+     * @param  {DocumentFragment} fragment to iterate over recursively
+     */
+
+
+    const _sanitizeShadowDOM = function _sanitizeShadowDOM(fragment) {
+      let shadowNode;
+
+      const shadowIterator = _createIterator(fragment);
+      /* Execute a hook if present */
+
+
+      _executeHook('beforeSanitizeShadowDOM', fragment, null);
+
+      while (shadowNode = shadowIterator.nextNode()) {
+        /* Execute a hook if present */
+        _executeHook('uponSanitizeShadowNode', shadowNode, null);
+        /* Sanitize tags and elements */
+
+
+        if (_sanitizeElements(shadowNode)) {
+          continue;
+        }
+        /* Deep shadow DOM detected */
+
+
+        if (shadowNode.content instanceof DocumentFragment) {
+          _sanitizeShadowDOM(shadowNode.content);
+        }
+        /* Check attributes, sanitize if necessary */
+
+
+        _sanitizeAttributes(shadowNode);
+      }
+      /* Execute a hook if present */
+
+
+      _executeHook('afterSanitizeShadowDOM', fragment, null);
+    };
+    /**
+     * Sanitize
+     * Public method providing core sanitation functionality
+     *
+     * @param {String|Node} dirty string or DOM node
+     * @param {Object} configuration object
+     */
+    // eslint-disable-next-line complexity
+
+
+    DOMPurify.sanitize = function (dirty) {
+      let cfg = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
+      let body;
+      let importedNode;
+      let currentNode;
+      let returnNode;
+      /* Make sure we have a string to sanitize.
+        DO NOT return early, as this will return the wrong type if
+        the user has requested a DOM object rather than a string */
+
+      IS_EMPTY_INPUT = !dirty;
+
+      if (IS_EMPTY_INPUT) {
+        dirty = '<!-->';
+      }
+      /* Stringify, in case dirty is an object */
+
+
+      if (typeof dirty !== 'string' && !_isNode(dirty)) {
+        // eslint-disable-next-line no-negated-condition
+        if (typeof dirty.toString !== 'function') {
+          throw typeErrorCreate('toString is not a function');
+        } else {
+          dirty = dirty.toString();
+
+          if (typeof dirty !== 'string') {
+            throw typeErrorCreate('dirty is not a string, aborting');
+          }
+        }
+      }
+      /* Return dirty HTML if DOMPurify cannot run */
+
+
+      if (!DOMPurify.isSupported) {
+        return dirty;
+      }
+      /* Assign config vars */
+
+
+      if (!SET_CONFIG) {
+        _parseConfig(cfg);
+      }
+      /* Clean up removed elements */
+
+
+      DOMPurify.removed = [];
+      /* Check if dirty is correctly typed for IN_PLACE */
+
+      if (typeof dirty === 'string') {
+        IN_PLACE = false;
+      }
+
+      if (IN_PLACE) {
+        /* Do some early pre-sanitization to avoid unsafe root nodes */
+        if (dirty.nodeName) {
+          const tagName = transformCaseFunc(dirty.nodeName);
+
+          if (!ALLOWED_TAGS[tagName] || FORBID_TAGS[tagName]) {
+            throw typeErrorCreate('root node is forbidden and cannot be sanitized in-place');
+          }
+        }
+      } else if (dirty instanceof Node) {
+        /* If dirty is a DOM element, append to an empty document to avoid
+           elements being stripped by the parser */
+        body = _initDocument('<!---->');
+        importedNode = body.ownerDocument.importNode(dirty, true);
+
+        if (importedNode.nodeType === 1 && importedNode.nodeName === 'BODY') {
+          /* Node is already a body, use as is */
+          body = importedNode;
+        } else if (importedNode.nodeName === 'HTML') {
+          body = importedNode;
+        } else {
+          // eslint-disable-next-line unicorn/prefer-dom-node-append
+          body.appendChild(importedNode);
+        }
+      } else {
+        /* Exit directly if we have nothing to do */
+        if (!RETURN_DOM && !SAFE_FOR_TEMPLATES && !WHOLE_DOCUMENT && // eslint-disable-next-line unicorn/prefer-includes
+        dirty.indexOf('<') === -1) {
+          return trustedTypesPolicy && RETURN_TRUSTED_TYPE ? trustedTypesPolicy.createHTML(dirty) : dirty;
+        }
+        /* Initialize the document to work on */
+
+
+        body = _initDocument(dirty);
+        /* Check we have a DOM node from the data */
+
+        if (!body) {
+          return RETURN_DOM ? null : RETURN_TRUSTED_TYPE ? emptyHTML : '';
+        }
+      }
+      /* Remove first element node (ours) if FORCE_BODY is set */
+
+
+      if (body && FORCE_BODY) {
+        _forceRemove(body.firstChild);
+      }
+      /* Get node iterator */
+
+
+      const nodeIterator = _createIterator(IN_PLACE ? dirty : body);
+      /* Now start iterating over the created document */
+
+
+      while (currentNode = nodeIterator.nextNode()) {
+        /* Sanitize tags and elements */
+        if (_sanitizeElements(currentNode)) {
+          continue;
+        }
+        /* Shadow DOM detected, sanitize it */
+
+
+        if (currentNode.content instanceof DocumentFragment) {
+          _sanitizeShadowDOM(currentNode.content);
+        }
+        /* Check attributes, sanitize if necessary */
+
+
+        _sanitizeAttributes(currentNode);
+      }
+      /* If we sanitized `dirty` in-place, return it. */
+
+
+      if (IN_PLACE) {
+        return dirty;
+      }
+      /* Return sanitized string or DOM */
+
+
+      if (RETURN_DOM) {
+        if (RETURN_DOM_FRAGMENT) {
+          returnNode = createDocumentFragment.call(body.ownerDocument);
+
+          while (body.firstChild) {
+            // eslint-disable-next-line unicorn/prefer-dom-node-append
+            returnNode.appendChild(body.firstChild);
+          }
+        } else {
+          returnNode = body;
+        }
+
+        if (ALLOWED_ATTR.shadowroot || ALLOWED_ATTR.shadowrootmod) {
+          /*
+            AdoptNode() is not used because internal state is not reset
+            (e.g. the past names map of a HTMLFormElement), this is safe
+            in theory but we would rather not risk another attack vector.
+            The state that is cloned by importNode() is explicitly defined
+            by the specs.
+          */
+          returnNode = importNode.call(originalDocument, returnNode, true);
+        }
+
+        return returnNode;
+      }
+
+      let serializedHTML = WHOLE_DOCUMENT ? body.outerHTML : body.innerHTML;
+      /* Serialize doctype if allowed */
+
+      if (WHOLE_DOCUMENT && ALLOWED_TAGS['!doctype'] && body.ownerDocument && body.ownerDocument.doctype && body.ownerDocument.doctype.name && regExpTest(DOCTYPE_NAME, body.ownerDocument.doctype.name)) {
+        serializedHTML = '<!DOCTYPE ' + body.ownerDocument.doctype.name + '>\n' + serializedHTML;
+      }
+      /* Sanitize final string template-safe */
+
+
+      if (SAFE_FOR_TEMPLATES) {
+        serializedHTML = stringReplace(serializedHTML, MUSTACHE_EXPR, ' ');
+        serializedHTML = stringReplace(serializedHTML, ERB_EXPR, ' ');
+        serializedHTML = stringReplace(serializedHTML, TMPLIT_EXPR, ' ');
+      }
+
+      return trustedTypesPolicy && RETURN_TRUSTED_TYPE ? trustedTypesPolicy.createHTML(serializedHTML) : serializedHTML;
+    };
+    /**
+     * Public method to set the configuration once
+     * setConfig
+     *
+     * @param {Object} cfg configuration object
+     */
+
+
+    DOMPurify.setConfig = function (cfg) {
+      _parseConfig(cfg);
+
+      SET_CONFIG = true;
+    };
+    /**
+     * Public method to remove the configuration
+     * clearConfig
+     *
+     */
+
+
+    DOMPurify.clearConfig = function () {
+      CONFIG = null;
+      SET_CONFIG = false;
+    };
+    /**
+     * Public method to check if an attribute value is valid.
+     * Uses last set config, if any. Otherwise, uses config defaults.
+     * isValidAttribute
+     *
+     * @param  {string} tag Tag name of containing element.
+     * @param  {string} attr Attribute name.
+     * @param  {string} value Attribute value.
+     * @return {Boolean} Returns true if `value` is valid. Otherwise, returns false.
+     */
+
+
+    DOMPurify.isValidAttribute = function (tag, attr, value) {
+      /* Initialize shared config vars if necessary. */
+      if (!CONFIG) {
+        _parseConfig({});
+      }
+
+      const lcTag = transformCaseFunc(tag);
+      const lcName = transformCaseFunc(attr);
+      return _isValidAttribute(lcTag, lcName, value);
+    };
+    /**
+     * AddHook
+     * Public method to add DOMPurify hooks
+     *
+     * @param {String} entryPoint entry point for the hook to add
+     * @param {Function} hookFunction function to execute
+     */
+
+
+    DOMPurify.addHook = function (entryPoint, hookFunction) {
+      if (typeof hookFunction !== 'function') {
+        return;
+      }
+
+      hooks[entryPoint] = hooks[entryPoint] || [];
+      arrayPush(hooks[entryPoint], hookFunction);
+    };
+    /**
+     * RemoveHook
+     * Public method to remove a DOMPurify hook at a given entryPoint
+     * (pops it from the stack of hooks if more are present)
+     *
+     * @param {String} entryPoint entry point for the hook to remove
+     * @return {Function} removed(popped) hook
+     */
+
+
+    DOMPurify.removeHook = function (entryPoint) {
+      if (hooks[entryPoint]) {
+        return arrayPop(hooks[entryPoint]);
+      }
+    };
+    /**
+     * RemoveHooks
+     * Public method to remove all DOMPurify hooks at a given entryPoint
+     *
+     * @param  {String} entryPoint entry point for the hooks to remove
+     */
+
+
+    DOMPurify.removeHooks = function (entryPoint) {
+      if (hooks[entryPoint]) {
+        hooks[entryPoint] = [];
+      }
+    };
+    /**
+     * RemoveAllHooks
+     * Public method to remove all DOMPurify hooks
+     *
+     */
+
+
+    DOMPurify.removeAllHooks = function () {
+      hooks = {};
+    };
+
+    return DOMPurify;
+  }
+
+  var purify = createDOMPurify();
+
+  return purify;
+
+}));
+//# sourceMappingURL=purify.js.map

programming_language: JavaScript
filename: purify.js.map
change_type: ModificationType.ADD
diff: @@ -0,0 +1 @@
+{"version":3,"file":"purify.js","sources":["../src/utils.js","../src/tags.js","../src/attrs.js","../src/regexp.js","../src/purify.js"],"sourcesContent":["const {\n  entries,\n  setPrototypeOf,\n  isFrozen,\n  getPrototypeOf,\n  getOwnPropertyDescriptor,\n} = Object;\n\nlet { freeze, seal, create } = Object; // eslint-disable-line import/no-mutable-exports\nlet { apply, construct } = typeof Reflect !== 'undefined' && Reflect;\n\nif (!apply) {\n  apply = function (fun, thisValue, args) {\n    return fun.apply(thisValue, args);\n  };\n}\n\nif (!freeze) {\n  freeze = function (x) {\n    return x;\n  };\n}\n\nif (!seal) {\n  seal = function (x) {\n    return x;\n  };\n}\n\nif (!construct) {\n  construct = function (Func, args) {\n    return new Func(...args);\n  };\n}\n\nconst arrayForEach = unapply(Array.prototype.forEach);\nconst arrayIndexOf = unapply(Array.prototype.indexOf);\nconst arrayPop = unapply(Array.prototype.pop);\nconst arrayPush = unapply(Array.prototype.push);\nconst arraySlice = unapply(Array.prototype.slice);\n\nconst stringToLowerCase = unapply(String.prototype.toLowerCase);\nconst stringToString = unapply(String.prototype.toString);\nconst stringMatch = unapply(String.prototype.match);\nconst stringReplace = unapply(String.prototype.replace);\nconst stringIndexOf = unapply(String.prototype.indexOf);\nconst stringTrim = unapply(String.prototype.trim);\n\nconst regExpTest = unapply(RegExp.prototype.test);\n\nconst typeErrorCreate = unconstruct(TypeError);\n\nexport function unapply(func) {\n  return (thisArg, ...args) => apply(func, thisArg, args);\n}\n\nexport function unconstruct(func) {\n  return (...args) => construct(func, args);\n}\n\n/* Add properties to a lookup table */\nexport function addToSet(set, array, transformCaseFunc) {\n  transformCaseFunc = transformCaseFunc ? transformCaseFunc : stringToLowerCase;\n  if (setPrototypeOf) {\n    // Make 'in' and truthy checks like Boolean(set.constructor)\n    // independent of any properties defined on Object.prototype.\n    // Prevent prototype setters from intercepting set as a this value.\n    setPrototypeOf(set, null);\n  }\n\n  let l = array.length;\n  while (l--) {\n    let element = array[l];\n    if (typeof element === 'string') {\n      const lcElement = transformCaseFunc(element);\n      if (lcElement !== element) {\n        // Config presets (e.g. tags.js, attrs.js) are immutable.\n        if (!isFrozen(array)) {\n          array[l] = lcElement;\n        }\n\n        element = lcElement;\n      }\n    }\n\n    set[element] = true;\n  }\n\n  return set;\n}\n\n/* Shallow clone an object */\nexport function clone(object) {\n  const newObject = create(null);\n\n  for (const [property, value] of entries(object)) {\n    newObject[property] = value;\n  }\n\n  return newObject;\n}\n\n/* This method automatically checks if the prop is function\n * or getter and behaves accordingly. */\nfunction lookupGetter(object, prop) {\n  while (object !== null) {\n    const desc = getOwnPropertyDescriptor(object, prop);\n    if (desc) {\n      if (desc.get) {\n        return unapply(desc.get);\n      }\n\n      if (typeof desc.value === 'function') {\n        return unapply(desc.value);\n      }\n    }\n\n    object = getPrototypeOf(object);\n  }\n\n  function fallbackValue(element) {\n    console.warn('fallback value for', element);\n    return null;\n  }\n\n  return fallbackValue;\n}\n\nexport {\n  // Array\n  arrayForEach,\n  arrayIndexOf,\n  arrayPop,\n  arrayPush,\n  arraySlice,\n  // Object\n  entries,\n  freeze,\n  getPrototypeOf,\n  getOwnPropertyDescriptor,\n  isFrozen,\n  setPrototypeOf,\n  seal,\n  // RegExp\n  regExpTest,\n  // String\n  stringIndexOf,\n  stringMatch,\n  stringReplace,\n  stringToLowerCase,\n  stringToString,\n  stringTrim,\n  // Errors\n  typeErrorCreate,\n  // Other\n  lookupGetter,\n};\n","import { freeze } from './utils.js';\n\nexport const html = freeze([\n  'a',\n  'abbr',\n  'acronym',\n  'address',\n  'area',\n  'article',\n  'aside',\n  'audio',\n  'b',\n  'bdi',\n  'bdo',\n  'big',\n  'blink',\n  'blockquote',\n  'body',\n  'br',\n  'button',\n  'canvas',\n  'caption',\n  'center',\n  'cite',\n  'code',\n  'col',\n  'colgroup',\n  'content',\n  'data',\n  'datalist',\n  'dd',\n  'decorator',\n  'del',\n  'details',\n  'dfn',\n  'dialog',\n  'dir',\n  'div',\n  'dl',\n  'dt',\n  'element',\n  'em',\n  'fieldset',\n  'figcaption',\n  'figure',\n  'font',\n  'footer',\n  'form',\n  'h1',\n  'h2',\n  'h3',\n  'h4',\n  'h5',\n  'h6',\n  'head',\n  'header',\n  'hgroup',\n  'hr',\n  'html',\n  'i',\n  'img',\n  'input',\n  'ins',\n  'kbd',\n  'label',\n  'legend',\n  'li',\n  'main',\n  'map',\n  'mark',\n  'marquee',\n  'menu',\n  'menuitem',\n  'meter',\n  'nav',\n  'nobr',\n  'ol',\n  'optgroup',\n  'option',\n  'output',\n  'p',\n  'picture',\n  'pre',\n  'progress',\n  'q',\n  'rp',\n  'rt',\n  'ruby',\n  's',\n  'samp',\n  'section',\n  'select',\n  'shadow',\n  'small',\n  'source',\n  'spacer',\n  'span',\n  'strike',\n  'strong',\n  'style',\n  'sub',\n  'summary',\n  'sup',\n  'table',\n  'tbody',\n  'td',\n  'template',\n  'textarea',\n  'tfoot',\n  'th',\n  'thead',\n  'time',\n  'tr',\n  'track',\n  'tt',\n  'u',\n  'ul',\n  'var',\n  'video',\n  'wbr',\n]);\n\n// SVG\nexport const svg = freeze([\n  'svg',\n  'a',\n  'altglyph',\n  'altglyphdef',\n  'altglyphitem',\n  'animatecolor',\n  'animatemotion',\n  'animatetransform',\n  'circle',\n  'clippath',\n  'defs',\n  'desc',\n  'ellipse',\n  'filter',\n  'font',\n  'g',\n  'glyph',\n  'glyphref',\n  'hkern',\n  'image',\n  'line',\n  'lineargradient',\n  'marker',\n  'mask',\n  'metadata',\n  'mpath',\n  'path',\n  'pattern',\n  'polygon',\n  'polyline',\n  'radialgradient',\n  'rect',\n  'stop',\n  'style',\n  'switch',\n  'symbol',\n  'text',\n  'textpath',\n  'title',\n  'tref',\n  'tspan',\n  'view',\n  'vkern',\n]);\n\nexport const svgFilters = freeze([\n  'feBlend',\n  'feColorMatrix',\n  'feComponentTransfer',\n  'feComposite',\n  'feConvolveMatrix',\n  'feDiffuseLighting',\n  'feDisplacementMap',\n  'feDistantLight',\n  'feFlood',\n  'feFuncA',\n  'feFuncB',\n  'feFuncG',\n  'feFuncR',\n  'feGaussianBlur',\n  'feImage',\n  'feMerge',\n  'feMergeNode',\n  'feMorphology',\n  'feOffset',\n  'fePointLight',\n  'feSpecularLighting',\n  'feSpotLight',\n  'feTile',\n  'feTurbulence',\n]);\n\n// List of SVG elements that are disallowed by default.\n// We still need to know them so that we can do namespace\n// checks properly in case one wants to add them to\n// allow-list.\nexport const svgDisallowed = freeze([\n  'animate',\n  'color-profile',\n  'cursor',\n  'discard',\n  'fedropshadow',\n  'font-face',\n  'font-face-format',\n  'font-face-name',\n  'font-face-src',\n  'font-face-uri',\n  'foreignobject',\n  'hatch',\n  'hatchpath',\n  'mesh',\n  'meshgradient',\n  'meshpatch',\n  'meshrow',\n  'missing-glyph',\n  'script',\n  'set',\n  'solidcolor',\n  'unknown',\n  'use',\n]);\n\nexport const mathMl = freeze([\n  'math',\n  'menclose',\n  'merror',\n  'mfenced',\n  'mfrac',\n  'mglyph',\n  'mi',\n  'mlabeledtr',\n  'mmultiscripts',\n  'mn',\n  'mo',\n  'mover',\n  'mpadded',\n  'mphantom',\n  'mroot',\n  'mrow',\n  'ms',\n  'mspace',\n  'msqrt',\n  'mstyle',\n  'msub',\n  'msup',\n  'msubsup',\n  'mtable',\n  'mtd',\n  'mtext',\n  'mtr',\n  'munder',\n  'munderover',\n  'mprescripts',\n]);\n\n// Similarly to SVG, we want to know all MathML elements,\n// even those that we disallow by default.\nexport const mathMlDisallowed = freeze([\n  'maction',\n  'maligngroup',\n  'malignmark',\n  'mlongdiv',\n  'mscarries',\n  'mscarry',\n  'msgroup',\n  'mstack',\n  'msline',\n  'msrow',\n  'semantics',\n  'annotation',\n  'annotation-xml',\n  'mprescripts',\n  'none',\n]);\n\nexport const text = freeze(['#text']);\n","import { freeze } from './utils.js';\n\nexport const html = freeze([\n  'accept',\n  'action',\n  'align',\n  'alt',\n  'autocapitalize',\n  'autocomplete',\n  'autopictureinpicture',\n  'autoplay',\n  'background',\n  'bgcolor',\n  'border',\n  'capture',\n  'cellpadding',\n  'cellspacing',\n  'checked',\n  'cite',\n  'class',\n  'clear',\n  'color',\n  'cols',\n  'colspan',\n  'controls',\n  'controlslist',\n  'coords',\n  'crossorigin',\n  'datetime',\n  'decoding',\n  'default',\n  'dir',\n  'disabled',\n  'disablepictureinpicture',\n  'disableremoteplayback',\n  'download',\n  'draggable',\n  'enctype',\n  'enterkeyhint',\n  'face',\n  'for',\n  'headers',\n  'height',\n  'hidden',\n  'high',\n  'href',\n  'hreflang',\n  'id',\n  'inputmode',\n  'integrity',\n  'ismap',\n  'kind',\n  'label',\n  'lang',\n  'list',\n  'loading',\n  'loop',\n  'low',\n  'max',\n  'maxlength',\n  'media',\n  'method',\n  'min',\n  'minlength',\n  'multiple',\n  'muted',\n  'name',\n  'nonce',\n  'noshade',\n  'novalidate',\n  'nowrap',\n  'open',\n  'optimum',\n  'pattern',\n  'placeholder',\n  'playsinline',\n  'poster',\n  'preload',\n  'pubdate',\n  'radiogroup',\n  'readonly',\n  'rel',\n  'required',\n  'rev',\n  'reversed',\n  'role',\n  'rows',\n  'rowspan',\n  'spellcheck',\n  'scope',\n  'selected',\n  'shape',\n  'size',\n  'sizes',\n  'span',\n  'srclang',\n  'start',\n  'src',\n  'srcset',\n  'step',\n  'style',\n  'summary',\n  'tabindex',\n  'title',\n  'translate',\n  'type',\n  'usemap',\n  'valign',\n  'value',\n  'width',\n  'xmlns',\n  'slot',\n]);\n\nexport const svg = freeze([\n  'accent-height',\n  'accumulate',\n  'additive',\n  'alignment-baseline',\n  'ascent',\n  'attributename',\n  'attributetype',\n  'azimuth',\n  'basefrequency',\n  'baseline-shift',\n  'begin',\n  'bias',\n  'by',\n  'class',\n  'clip',\n  'clippathunits',\n  'clip-path',\n  'clip-rule',\n  'color',\n  'color-interpolation',\n  'color-interpolation-filters',\n  'color-profile',\n  'color-rendering',\n  'cx',\n  'cy',\n  'd',\n  'dx',\n  'dy',\n  'diffuseconstant',\n  'direction',\n  'display',\n  'divisor',\n  'dur',\n  'edgemode',\n  'elevation',\n  'end',\n  'fill',\n  'fill-opacity',\n  'fill-rule',\n  'filter',\n  'filterunits',\n  'flood-color',\n  'flood-opacity',\n  'font-family',\n  'font-size',\n  'font-size-adjust',\n  'font-stretch',\n  'font-style',\n  'font-variant',\n  'font-weight',\n  'fx',\n  'fy',\n  'g1',\n  'g2',\n  'glyph-name',\n  'glyphref',\n  'gradientunits',\n  'gradienttransform',\n  'height',\n  'href',\n  'id',\n  'image-rendering',\n  'in',\n  'in2',\n  'k',\n  'k1',\n  'k2',\n  'k3',\n  'k4',\n  'kerning',\n  'keypoints',\n  'keysplines',\n  'keytimes',\n  'lang',\n  'lengthadjust',\n  'letter-spacing',\n  'kernelmatrix',\n  'kernelunitlength',\n  'lighting-color',\n  'local',\n  'marker-end',\n  'marker-mid',\n  'marker-start',\n  'markerheight',\n  'markerunits',\n  'markerwidth',\n  'maskcontentunits',\n  'maskunits',\n  'max',\n  'mask',\n  'media',\n  'method',\n  'mode',\n  'min',\n  'name',\n  'numoctaves',\n  'offset',\n  'operator',\n  'opacity',\n  'order',\n  'orient',\n  'orientation',\n  'origin',\n  'overflow',\n  'paint-order',\n  'path',\n  'pathlength',\n  'patterncontentunits',\n  'patterntransform',\n  'patternunits',\n  'points',\n  'preservealpha',\n  'preserveaspectratio',\n  'primitiveunits',\n  'r',\n  'rx',\n  'ry',\n  'radius',\n  'refx',\n  'refy',\n  'repeatcount',\n  'repeatdur',\n  'restart',\n  'result',\n  'rotate',\n  'scale',\n  'seed',\n  'shape-rendering',\n  'specularconstant',\n  'specularexponent',\n  'spreadmethod',\n  'startoffset',\n  'stddeviation',\n  'stitchtiles',\n  'stop-color',\n  'stop-opacity',\n  'stroke-dasharray',\n  'stroke-dashoffset',\n  'stroke-linecap',\n  'stroke-linejoin',\n  'stroke-miterlimit',\n  'stroke-opacity',\n  'stroke',\n  'stroke-width',\n  'style',\n  'surfacescale',\n  'systemlanguage',\n  'tabindex',\n  'targetx',\n  'targety',\n  'transform',\n  'transform-origin',\n  'text-anchor',\n  'text-decoration',\n  'text-rendering',\n  'textlength',\n  'type',\n  'u1',\n  'u2',\n  'unicode',\n  'values',\n  'viewbox',\n  'visibility',\n  'version',\n  'vert-adv-y',\n  'vert-origin-x',\n  'vert-origin-y',\n  'width',\n  'word-spacing',\n  'wrap',\n  'writing-mode',\n  'xchannelselector',\n  'ychannelselector',\n  'x',\n  'x1',\n  'x2',\n  'xmlns',\n  'y',\n  'y1',\n  'y2',\n  'z',\n  'zoomandpan',\n]);\n\nexport const mathMl = freeze([\n  'accent',\n  'accentunder',\n  'align',\n  'bevelled',\n  'close',\n  'columnsalign',\n  'columnlines',\n  'columnspan',\n  'denomalign',\n  'depth',\n  'dir',\n  'display',\n  'displaystyle',\n  'encoding',\n  'fence',\n  'frame',\n  'height',\n  'href',\n  'id',\n  'largeop',\n  'length',\n  'linethickness',\n  'lspace',\n  'lquote',\n  'mathbackground',\n  'mathcolor',\n  'mathsize',\n  'mathvariant',\n  'maxsize',\n  'minsize',\n  'movablelimits',\n  'notation',\n  'numalign',\n  'open',\n  'rowalign',\n  'rowlines',\n  'rowspacing',\n  'rowspan',\n  'rspace',\n  'rquote',\n  'scriptlevel',\n  'scriptminsize',\n  'scriptsizemultiplier',\n  'selection',\n  'separator',\n  'separators',\n  'stretchy',\n  'subscriptshift',\n  'supscriptshift',\n  'symmetric',\n  'voffset',\n  'width',\n  'xmlns',\n]);\n\nexport const xml = freeze([\n  'xlink:href',\n  'xml:id',\n  'xlink:title',\n  'xml:space',\n  'xmlns:xlink',\n]);\n","import { seal } from './utils.js';\n\n// eslint-disable-next-line unicorn/better-regex\nexport const MUSTACHE_EXPR = seal(/\\{\\{[\\w\\W]*|[\\w\\W]*\\}\\}/gm); // Specify template detection regex for SAFE_FOR_TEMPLATES mode\nexport const ERB_EXPR = seal(/<%[\\w\\W]*|[\\w\\W]*%>/gm);\nexport const TMPLIT_EXPR = seal(/\\${[\\w\\W]*}/gm);\nexport const DATA_ATTR = seal(/^data-[\\-\\w.\\u00B7-\\uFFFF]/); // eslint-disable-line no-useless-escape\nexport const ARIA_ATTR = seal(/^aria-[\\-\\w]+$/); // eslint-disable-line no-useless-escape\nexport const IS_ALLOWED_URI = seal(\n  /^(?:(?:(?:f|ht)tps?|mailto|tel|callto|sms|cid|xmpp):|[^a-z]|[a-z+.\\-]+(?:[^a-z+.\\-:]|$))/i // eslint-disable-line no-useless-escape\n);\nexport const IS_SCRIPT_OR_DATA = seal(/^(?:\\w+script|data):/i);\nexport const ATTR_WHITESPACE = seal(\n  /[\\u0000-\\u0020\\u00A0\\u1680\\u180E\\u2000-\\u2029\\u205F\\u3000]/g // eslint-disable-line no-control-regex\n);\nexport const DOCTYPE_NAME = seal(/^html$/i);\n","import * as TAGS from './tags.js';\nimport * as ATTRS from './attrs.js';\nimport * as EXPRESSIONS from './regexp.js';\nimport {\n  addToSet,\n  clone,\n  entries,\n  freeze,\n  arrayForEach,\n  arrayPop,\n  arrayPush,\n  stringMatch,\n  stringReplace,\n  stringToLowerCase,\n  stringToString,\n  stringIndexOf,\n  stringTrim,\n  regExpTest,\n  typeErrorCreate,\n  lookupGetter,\n} from './utils.js';\n\nconst getGlobal = () => (typeof window === 'undefined' ? null : window);\n\n/**\n * Creates a no-op policy for internal use only.\n * Don't export this function outside this module!\n * @param {?TrustedTypePolicyFactory} trustedTypes The policy factory.\n * @param {Document} document The document object (to determine policy name suffix)\n * @return {?TrustedTypePolicy} The policy created (or null, if Trusted Types\n * are not supported).\n */\nconst _createTrustedTypesPolicy = function (trustedTypes, document) {\n  if (\n    typeof trustedTypes !== 'object' ||\n    typeof trustedTypes.createPolicy !== 'function'\n  ) {\n    return null;\n  }\n\n  // Allow the callers to control the unique policy name\n  // by adding a data-tt-policy-suffix to the script element with the DOMPurify.\n  // Policy creation with duplicate names throws in Trusted Types.\n  let suffix = null;\n  const ATTR_NAME = 'data-tt-policy-suffix';\n  if (\n    document.currentScript &&\n    document.currentScript.hasAttribute(ATTR_NAME)\n  ) {\n    suffix = document.currentScript.getAttribute(ATTR_NAME);\n  }\n\n  const policyName = 'dompurify' + (suffix ? '#' + suffix : '');\n\n  try {\n    return trustedTypes.createPolicy(policyName, {\n      createHTML(html) {\n        return html;\n      },\n      createScriptURL(scriptUrl) {\n        return scriptUrl;\n      },\n    });\n  } catch (_) {\n    // Policy creation failed (most likely another DOMPurify script has\n    // already run). Skip creating the policy, as this will only cause errors\n    // if TT are enforced.\n    console.warn(\n      'TrustedTypes policy ' + policyName + ' could not be created.'\n    );\n    return null;\n  }\n};\n\nfunction createDOMPurify(window = getGlobal()) {\n  const DOMPurify = (root) => createDOMPurify(root);\n\n  /**\n   * Version label, exposed for easier checks\n   * if DOMPurify is up to date or not\n   */\n  DOMPurify.version = VERSION;\n\n  /**\n   * Array of elements that DOMPurify removed during sanitation.\n   * Empty if nothing was removed.\n   */\n  DOMPurify.removed = [];\n\n  if (!window || !window.document || window.document.nodeType !== 9) {\n    // Not running in a browser, provide a factory function\n    // so that you can pass your own Window\n    DOMPurify.isSupported = false;\n\n    return DOMPurify;\n  }\n\n  const originalDocument = window.document;\n\n  let { document } = window;\n  const {\n    DocumentFragment,\n    HTMLTemplateElement,\n    Node,\n    Element,\n    NodeFilter,\n    NamedNodeMap = window.NamedNodeMap || window.MozNamedAttrMap,\n    HTMLFormElement,\n    DOMParser,\n    trustedTypes,\n  } = window;\n\n  const ElementPrototype = Element.prototype;\n\n  const cloneNode = lookupGetter(ElementPrototype, 'cloneNode');\n  const getNextSibling = lookupGetter(ElementPrototype, 'nextSibling');\n  const getChildNodes = lookupGetter(ElementPrototype, 'childNodes');\n  const getParentNode = lookupGetter(ElementPrototype, 'parentNode');\n\n  // As per issue #47, the web-components registry is inherited by a\n  // new document created via createHTMLDocument. As per the spec\n  // (http://w3c.github.io/webcomponents/spec/custom/#creating-and-passing-registries)\n  // a new empty registry is used when creating a template contents owner\n  // document, so we use that as our parent document to ensure nothing\n  // is inherited.\n  if (typeof HTMLTemplateElement === 'function') {\n    const template = document.createElement('template');\n    if (template.content && template.content.ownerDocument) {\n      document = template.content.ownerDocument;\n    }\n  }\n\n  const trustedTypesPolicy = _createTrustedTypesPolicy(\n    trustedTypes,\n    originalDocument\n  );\n  const emptyHTML = trustedTypesPolicy ? trustedTypesPolicy.createHTML('') : '';\n\n  const {\n    implementation,\n    createNodeIterator,\n    createDocumentFragment,\n    getElementsByTagName,\n  } = document;\n  const { importNode } = originalDocument;\n\n  let hooks = {};\n\n  /**\n   * Expose whether this browser supports running the full DOMPurify.\n   */\n  DOMPurify.isSupported =\n    typeof entries === 'function' &&\n    typeof getParentNode === 'function' &&\n    implementation &&\n    typeof implementation.createHTMLDocument !== 'undefined';\n\n  const {\n    MUSTACHE_EXPR,\n    ERB_EXPR,\n    TMPLIT_EXPR,\n    DATA_ATTR,\n    ARIA_ATTR,\n    IS_SCRIPT_OR_DATA,\n    ATTR_WHITESPACE,\n  } = EXPRESSIONS;\n\n  let { IS_ALLOWED_URI } = EXPRESSIONS;\n\n  /**\n   * We consider the elements and attributes below to be safe. Ideally\n   * don't add any new ones but feel free to remove unwanted ones.\n   */\n\n  /* allowed element names */\n  let ALLOWED_TAGS = null;\n  const DEFAULT_ALLOWED_TAGS = addToSet({}, [\n    ...TAGS.html,\n    ...TAGS.svg,\n    ...TAGS.svgFilters,\n    ...TAGS.mathMl,\n    ...TAGS.text,\n  ]);\n\n  /* Allowed attribute names */\n  let ALLOWED_ATTR = null;\n  const DEFAULT_ALLOWED_ATTR = addToSet({}, [\n    ...ATTRS.html,\n    ...ATTRS.svg,\n    ...ATTRS.mathMl,\n    ...ATTRS.xml,\n  ]);\n\n  /*\n   * Configure how DOMPUrify should handle custom elements and their attributes as well as customized built-in elements.\n   * @property {RegExp|Function|null} tagNameCheck one of [null, regexPattern, predicate]. Default: `null` (disallow any custom elements)\n   * @property {RegExp|Function|null} attributeNameCheck one of [null, regexPattern, predicate]. Default: `null` (disallow any attributes not on the allow list)\n   * @property {boolean} allowCustomizedBuiltInElements allow custom elements derived from built-ins if they pass CUSTOM_ELEMENT_HANDLING.tagNameCheck. Default: `false`.\n   */\n  let CUSTOM_ELEMENT_HANDLING = Object.seal(\n    Object.create(null, {\n      tagNameCheck: {\n        writable: true,\n        configurable: false,\n        enumerable: true,\n        value: null,\n      },\n      attributeNameCheck: {\n        writable: true,\n        configurable: false,\n        enumerable: true,\n        value: null,\n      },\n      allowCustomizedBuiltInElements: {\n        writable: true,\n        configurable: false,\n        enumerable: true,\n        value: false,\n      },\n    })\n  );\n\n  /* Explicitly forbidden tags (overrides ALLOWED_TAGS/ADD_TAGS) */\n  let FORBID_TAGS = null;\n\n  /* Explicitly forbidden attributes (overrides ALLOWED_ATTR/ADD_ATTR) */\n  let FORBID_ATTR = null;\n\n  /* Decide if ARIA attributes are okay */\n  let ALLOW_ARIA_ATTR = true;\n\n  /* Decide if custom data attributes are okay */\n  let ALLOW_DATA_ATTR = true;\n\n  /* Decide if unknown protocols are okay */\n  let ALLOW_UNKNOWN_PROTOCOLS = false;\n\n  /* Decide if self-closing tags in attributes are allowed.\n   * Usually removed due to a mXSS issue in jQuery 3.0 */\n  let ALLOW_SELF_CLOSE_IN_ATTR = true;\n\n  /* Output should be safe for common template engines.\n   * This means, DOMPurify removes data attributes, mustaches and ERB\n   */\n  let SAFE_FOR_TEMPLATES = false;\n\n  /* Decide if document with <html>... should be returned */\n  let WHOLE_DOCUMENT = false;\n\n  /* Track whether config is already set on this instance of DOMPurify. */\n  let SET_CONFIG = false;\n\n  /* Decide if all elements (e.g. style, script) must be children of\n   * document.body. By default, browsers might move them to document.head */\n  let FORCE_BODY = false;\n\n  /* Decide if a DOM `HTMLBodyElement` should be returned, instead of a html\n   * string (or a TrustedHTML object if Trusted Types are supported).\n   * If `WHOLE_DOCUMENT` is enabled a `HTMLHtmlElement` will be returned instead\n   */\n  let RETURN_DOM = false;\n\n  /* Decide if a DOM `DocumentFragment` should be returned, instead of a html\n   * string  (or a TrustedHTML object if Trusted Types are supported) */\n  let RETURN_DOM_FRAGMENT = false;\n\n  /* Try to return a Trusted Type object instead of a string, return a string in\n   * case Trusted Types are not supported  */\n  let RETURN_TRUSTED_TYPE = false;\n\n  /* Output should be free from DOM clobbering attacks?\n   * This sanitizes markups named with colliding, clobberable built-in DOM APIs.\n   */\n  let SANITIZE_DOM = true;\n\n  /* Achieve full DOM Clobbering protection by isolating the namespace of named\n   * properties and JS variables, mitigating attacks that abuse the HTML/DOM spec rules.\n   *\n   * HTML/DOM spec rules that enable DOM Clobbering:\n   *   - Named Access on Window (§7.3.3)\n   *   - DOM Tree Accessors (§3.1.5)\n   *   - Form Element Parent-Child Relations (§4.10.3)\n   *   - Iframe srcdoc / Nested WindowProxies (§4.8.5)\n   *   - HTMLCollection (§4.2.10.2)\n   *\n   * Namespace isolation is implemented by prefixing `id` and `name` attributes\n   * with a constant string, i.e., `user-content-`\n   */\n  let SANITIZE_NAMED_PROPS = false;\n  const SANITIZE_NAMED_PROPS_PREFIX = 'user-content-';\n\n  /* Keep element content when removing element? */\n  let KEEP_CONTENT = true;\n\n  /* If a `Node` is passed to sanitize(), then performs sanitization in-place instead\n   * of importing it into a new Document and returning a sanitized copy */\n  let IN_PLACE = false;\n\n  /* Allow usage of profiles like html, svg and mathMl */\n  let USE_PROFILES = {};\n\n  /* Tags to ignore content of when KEEP_CONTENT is true */\n  let FORBID_CONTENTS = null;\n  const DEFAULT_FORBID_CONTENTS = addToSet({}, [\n    'annotation-xml',\n    'audio',\n    'colgroup',\n    'desc',\n    'foreignobject',\n    'head',\n    'iframe',\n    'math',\n    'mi',\n    'mn',\n    'mo',\n    'ms',\n    'mtext',\n    'noembed',\n    'noframes',\n    'noscript',\n    'plaintext',\n    'script',\n    'style',\n    'svg',\n    'template',\n    'thead',\n    'title',\n    'video',\n    'xmp',\n  ]);\n\n  /* Tags that are safe for data: URIs */\n  let DATA_URI_TAGS = null;\n  const DEFAULT_DATA_URI_TAGS = addToSet({}, [\n    'audio',\n    'video',\n    'img',\n    'source',\n    'image',\n    'track',\n  ]);\n\n  /* Attributes safe for values like \"javascript:\" */\n  let URI_SAFE_ATTRIBUTES = null;\n  const DEFAULT_URI_SAFE_ATTRIBUTES = addToSet({}, [\n    'alt',\n    'class',\n    'for',\n    'id',\n    'label',\n    'name',\n    'pattern',\n    'placeholder',\n    'role',\n    'summary',\n    'title',\n    'value',\n    'style',\n    'xmlns',\n  ]);\n\n  const MATHML_NAMESPACE = 'http://www.w3.org/1998/Math/MathML';\n  const SVG_NAMESPACE = 'http://www.w3.org/2000/svg';\n  const HTML_NAMESPACE = 'http://www.w3.org/1999/xhtml';\n  /* Document namespace */\n  let NAMESPACE = HTML_NAMESPACE;\n  let IS_EMPTY_INPUT = false;\n\n  /* Allowed XHTML+XML namespaces */\n  let ALLOWED_NAMESPACES = null;\n  const DEFAULT_ALLOWED_NAMESPACES = addToSet(\n    {},\n    [MATHML_NAMESPACE, SVG_NAMESPACE, HTML_NAMESPACE],\n    stringToString\n  );\n\n  /* Parsing of strict XHTML documents */\n  let PARSER_MEDIA_TYPE;\n  const SUPPORTED_PARSER_MEDIA_TYPES = ['application/xhtml+xml', 'text/html'];\n  const DEFAULT_PARSER_MEDIA_TYPE = 'text/html';\n  let transformCaseFunc;\n\n  /* Keep a reference to config to pass to hooks */\n  let CONFIG = null;\n\n  /* Ideally, do not touch anything below this line */\n  /* ______________________________________________ */\n\n  const formElement = document.createElement('form');\n\n  const isRegexOrFunction = function (testValue) {\n    return testValue instanceof RegExp || testValue instanceof Function;\n  };\n\n  /**\n   * _parseConfig\n   *\n   * @param  {Object} cfg optional config literal\n   */\n  // eslint-disable-next-line complexity\n  const _parseConfig = function (cfg) {\n    if (CONFIG && CONFIG === cfg) {\n      return;\n    }\n\n    /* Shield configuration object from tampering */\n    if (!cfg || typeof cfg !== 'object') {\n      cfg = {};\n    }\n\n    /* Shield configuration object from prototype pollution */\n    cfg = clone(cfg);\n\n    PARSER_MEDIA_TYPE =\n      // eslint-disable-next-line unicorn/prefer-includes\n      SUPPORTED_PARSER_MEDIA_TYPES.indexOf(cfg.PARSER_MEDIA_TYPE) === -1\n        ? (PARSER_MEDIA_TYPE = DEFAULT_PARSER_MEDIA_TYPE)\n        : (PARSER_MEDIA_TYPE = cfg.PARSER_MEDIA_TYPE);\n\n    // HTML tags and attributes are not case-sensitive, converting to lowercase. Keeping XHTML as is.\n    transformCaseFunc =\n      PARSER_MEDIA_TYPE === 'application/xhtml+xml'\n        ? stringToString\n        : stringToLowerCase;\n\n    /* Set configuration parameters */\n    ALLOWED_TAGS =\n      'ALLOWED_TAGS' in cfg\n        ? addToSet({}, cfg.ALLOWED_TAGS, transformCaseFunc)\n        : DEFAULT_ALLOWED_TAGS;\n    ALLOWED_ATTR =\n      'ALLOWED_ATTR' in cfg\n        ? addToSet({}, cfg.ALLOWED_ATTR, transformCaseFunc)\n        : DEFAULT_ALLOWED_ATTR;\n    ALLOWED_NAMESPACES =\n      'ALLOWED_NAMESPACES' in cfg\n        ? addToSet({}, cfg.ALLOWED_NAMESPACES, stringToString)\n        : DEFAULT_ALLOWED_NAMESPACES;\n    URI_SAFE_ATTRIBUTES =\n      'ADD_URI_SAFE_ATTR' in cfg\n        ? addToSet(\n            clone(DEFAULT_URI_SAFE_ATTRIBUTES), // eslint-disable-line indent\n            cfg.ADD_URI_SAFE_ATTR, // eslint-disable-line indent\n            transformCaseFunc // eslint-disable-line indent\n          ) // eslint-disable-line indent\n        : DEFAULT_URI_SAFE_ATTRIBUTES;\n    DATA_URI_TAGS =\n      'ADD_DATA_URI_TAGS' in cfg\n        ? addToSet(\n            clone(DEFAULT_DATA_URI_TAGS), // eslint-disable-line indent\n            cfg.ADD_DATA_URI_TAGS, // eslint-disable-line indent\n            transformCaseFunc // eslint-disable-line indent\n          ) // eslint-disable-line indent\n        : DEFAULT_DATA_URI_TAGS;\n    FORBID_CONTENTS =\n      'FORBID_CONTENTS' in cfg\n        ? addToSet({}, cfg.FORBID_CONTENTS, transformCaseFunc)\n        : DEFAULT_FORBID_CONTENTS;\n    FORBID_TAGS =\n      'FORBID_TAGS' in cfg\n        ? addToSet({}, cfg.FORBID_TAGS, transformCaseFunc)\n        : {};\n    FORBID_ATTR =\n      'FORBID_ATTR' in cfg\n        ? addToSet({}, cfg.FORBID_ATTR, transformCaseFunc)\n        : {};\n    USE_PROFILES = 'USE_PROFILES' in cfg ? cfg.USE_PROFILES : false;\n    ALLOW_ARIA_ATTR = cfg.ALLOW_ARIA_ATTR !== false; // Default true\n    ALLOW_DATA_ATTR = cfg.ALLOW_DATA_ATTR !== false; // Default true\n    ALLOW_UNKNOWN_PROTOCOLS = cfg.ALLOW_UNKNOWN_PROTOCOLS || false; // Default false\n    ALLOW_SELF_CLOSE_IN_ATTR = cfg.ALLOW_SELF_CLOSE_IN_ATTR !== false; // Default true\n    SAFE_FOR_TEMPLATES = cfg.SAFE_FOR_TEMPLATES || false; // Default false\n    WHOLE_DOCUMENT = cfg.WHOLE_DOCUMENT || false; // Default false\n    RETURN_DOM = cfg.RETURN_DOM || false; // Default false\n    RETURN_DOM_FRAGMENT = cfg.RETURN_DOM_FRAGMENT || false; // Default false\n    RETURN_TRUSTED_TYPE = cfg.RETURN_TRUSTED_TYPE || false; // Default false\n    FORCE_BODY = cfg.FORCE_BODY || false; // Default false\n    SANITIZE_DOM = cfg.SANITIZE_DOM !== false; // Default true\n    SANITIZE_NAMED_PROPS = cfg.SANITIZE_NAMED_PROPS || false; // Default false\n    KEEP_CONTENT = cfg.KEEP_CONTENT !== false; // Default true\n    IN_PLACE = cfg.IN_PLACE || false; // Default false\n    IS_ALLOWED_URI = cfg.ALLOWED_URI_REGEXP || EXPRESSIONS.IS_ALLOWED_URI;\n    NAMESPACE = cfg.NAMESPACE || HTML_NAMESPACE;\n    CUSTOM_ELEMENT_HANDLING = cfg.CUSTOM_ELEMENT_HANDLING || {};\n    if (\n      cfg.CUSTOM_ELEMENT_HANDLING &&\n      isRegexOrFunction(cfg.CUSTOM_ELEMENT_HANDLING.tagNameCheck)\n    ) {\n      CUSTOM_ELEMENT_HANDLING.tagNameCheck =\n        cfg.CUSTOM_ELEMENT_HANDLING.tagNameCheck;\n    }\n\n    if (\n      cfg.CUSTOM_ELEMENT_HANDLING &&\n      isRegexOrFunction(cfg.CUSTOM_ELEMENT_HANDLING.attributeNameCheck)\n    ) {\n      CUSTOM_ELEMENT_HANDLING.attributeNameCheck =\n        cfg.CUSTOM_ELEMENT_HANDLING.attributeNameCheck;\n    }\n\n    if (\n      cfg.CUSTOM_ELEMENT_HANDLING &&\n      typeof cfg.CUSTOM_ELEMENT_HANDLING.allowCustomizedBuiltInElements ===\n        'boolean'\n    ) {\n      CUSTOM_ELEMENT_HANDLING.allowCustomizedBuiltInElements =\n        cfg.CUSTOM_ELEMENT_HANDLING.allowCustomizedBuiltInElements;\n    }\n\n    if (SAFE_FOR_TEMPLATES) {\n      ALLOW_DATA_ATTR = false;\n    }\n\n    if (RETURN_DOM_FRAGMENT) {\n      RETURN_DOM = true;\n    }\n\n    /* Parse profile info */\n    if (USE_PROFILES) {\n      ALLOWED_TAGS = addToSet({}, [...TAGS.text]);\n      ALLOWED_ATTR = [];\n      if (USE_PROFILES.html === true) {\n        addToSet(ALLOWED_TAGS, TAGS.html);\n        addToSet(ALLOWED_ATTR, ATTRS.html);\n      }\n\n      if (USE_PROFILES.svg === true) {\n        addToSet(ALLOWED_TAGS, TAGS.svg);\n        addToSet(ALLOWED_ATTR, ATTRS.svg);\n        addToSet(ALLOWED_ATTR, ATTRS.xml);\n      }\n\n      if (USE_PROFILES.svgFilters === true) {\n        addToSet(ALLOWED_TAGS, TAGS.svgFilters);\n        addToSet(ALLOWED_ATTR, ATTRS.svg);\n        addToSet(ALLOWED_ATTR, ATTRS.xml);\n      }\n\n      if (USE_PROFILES.mathMl === true) {\n        addToSet(ALLOWED_TAGS, TAGS.mathMl);\n        addToSet(ALLOWED_ATTR, ATTRS.mathMl);\n        addToSet(ALLOWED_ATTR, ATTRS.xml);\n      }\n    }\n\n    /* Merge configuration parameters */\n    if (cfg.ADD_TAGS) {\n      if (ALLOWED_TAGS === DEFAULT_ALLOWED_TAGS) {\n        ALLOWED_TAGS = clone(ALLOWED_TAGS);\n      }\n\n      addToSet(ALLOWED_TAGS, cfg.ADD_TAGS, transformCaseFunc);\n    }\n\n    if (cfg.ADD_ATTR) {\n      if (ALLOWED_ATTR === DEFAULT_ALLOWED_ATTR) {\n        ALLOWED_ATTR = clone(ALLOWED_ATTR);\n      }\n\n      addToSet(ALLOWED_ATTR, cfg.ADD_ATTR, transformCaseFunc);\n    }\n\n    if (cfg.ADD_URI_SAFE_ATTR) {\n      addToSet(URI_SAFE_ATTRIBUTES, cfg.ADD_URI_SAFE_ATTR, transformCaseFunc);\n    }\n\n    if (cfg.FORBID_CONTENTS) {\n      if (FORBID_CONTENTS === DEFAULT_FORBID_CONTENTS) {\n        FORBID_CONTENTS = clone(FORBID_CONTENTS);\n      }\n\n      addToSet(FORBID_CONTENTS, cfg.FORBID_CONTENTS, transformCaseFunc);\n    }\n\n    /* Add #text in case KEEP_CONTENT is set to true */\n    if (KEEP_CONTENT) {\n      ALLOWED_TAGS['#text'] = true;\n    }\n\n    /* Add html, head and body to ALLOWED_TAGS in case WHOLE_DOCUMENT is true */\n    if (WHOLE_DOCUMENT) {\n      addToSet(ALLOWED_TAGS, ['html', 'head', 'body']);\n    }\n\n    /* Add tbody to ALLOWED_TAGS in case tables are permitted, see #286, #365 */\n    if (ALLOWED_TAGS.table) {\n      addToSet(ALLOWED_TAGS, ['tbody']);\n      delete FORBID_TAGS.tbody;\n    }\n\n    // Prevent further manipulation of configuration.\n    // Not available in IE8, Safari 5, etc.\n    if (freeze) {\n      freeze(cfg);\n    }\n\n    CONFIG = cfg;\n  };\n\n  const MATHML_TEXT_INTEGRATION_POINTS = addToSet({}, [\n    'mi',\n    'mo',\n    'mn',\n    'ms',\n    'mtext',\n  ]);\n\n  const HTML_INTEGRATION_POINTS = addToSet({}, [\n    'foreignobject',\n    'desc',\n    'title',\n    'annotation-xml',\n  ]);\n\n  // Certain elements are allowed in both SVG and HTML\n  // namespace. We need to specify them explicitly\n  // so that they don't get erroneously deleted from\n  // HTML namespace.\n  const COMMON_SVG_AND_HTML_ELEMENTS = addToSet({}, [\n    'title',\n    'style',\n    'font',\n    'a',\n    'script',\n  ]);\n\n  /* Keep track of all possible SVG and MathML tags\n   * so that we can perform the namespace checks\n   * correctly. */\n  const ALL_SVG_TAGS = addToSet({}, TAGS.svg);\n  addToSet(ALL_SVG_TAGS, TAGS.svgFilters);\n  addToSet(ALL_SVG_TAGS, TAGS.svgDisallowed);\n\n  const ALL_MATHML_TAGS = addToSet({}, TAGS.mathMl);\n  addToSet(ALL_MATHML_TAGS, TAGS.mathMlDisallowed);\n\n  /**\n   *\n   *\n   * @param  {Element} element a DOM element whose namespace is being checked\n   * @returns {boolean} Return false if the element has a\n   *  namespace that a spec-compliant parser would never\n   *  return. Return true otherwise.\n   */\n  const _checkValidNamespace = function (element) {\n    let parent = getParentNode(element);\n\n    // In JSDOM, if we're inside shadow DOM, then parentNode\n    // can be null. We just simulate parent in this case.\n    if (!parent || !parent.tagName) {\n      parent = {\n        namespaceURI: NAMESPACE,\n        tagName: 'template',\n      };\n    }\n\n    const tagName = stringToLowerCase(element.tagName);\n    const parentTagName = stringToLowerCase(parent.tagName);\n\n    if (!ALLOWED_NAMESPACES[element.namespaceURI]) {\n      return false;\n    }\n\n    if (element.namespaceURI === SVG_NAMESPACE) {\n      // The only way to switch from HTML namespace to SVG\n      // is via <svg>. If it happens via any other tag, then\n      // it should be killed.\n      if (parent.namespaceURI === HTML_NAMESPACE) {\n        return tagName === 'svg';\n      }\n\n      // The only way to switch from MathML to SVG is via`\n      // svg if parent is either <annotation-xml> or MathML\n      // text integration points.\n      if (parent.namespaceURI === MATHML_NAMESPACE) {\n        return (\n          tagName === 'svg' &&\n          (parentTagName === 'annotation-xml' ||\n            MATHML_TEXT_INTEGRATION_POINTS[parentTagName])\n        );\n      }\n\n      // We only allow elements that are defined in SVG\n      // spec. All others are disallowed in SVG namespace.\n      return Boolean(ALL_SVG_TAGS[tagName]);\n    }\n\n    if (element.namespaceURI === MATHML_NAMESPACE) {\n      // The only way to switch from HTML namespace to MathML\n      // is via <math>. If it happens via any other tag, then\n      // it should be killed.\n      if (parent.namespaceURI === HTML_NAMESPACE) {\n        return tagName === 'math';\n      }\n\n      // The only way to switch from SVG to MathML is via\n      // <math> and HTML integration points\n      if (parent.namespaceURI === SVG_NAMESPACE) {\n        return tagName === 'math' && HTML_INTEGRATION_POINTS[parentTagName];\n      }\n\n      // We only allow elements that are defined in MathML\n      // spec. All others are disallowed in MathML namespace.\n      return Boolean(ALL_MATHML_TAGS[tagName]);\n    }\n\n    if (element.namespaceURI === HTML_NAMESPACE) {\n      // The only way to switch from SVG to HTML is via\n      // HTML integration points, and from MathML to HTML\n      // is via MathML text integration points\n      if (\n        parent.namespaceURI === SVG_NAMESPACE &&\n        !HTML_INTEGRATION_POINTS[parentTagName]\n      ) {\n        return false;\n      }\n\n      if (\n        parent.namespaceURI === MATHML_NAMESPACE &&\n        !MATHML_TEXT_INTEGRATION_POINTS[parentTagName]\n      ) {\n        return false;\n      }\n\n      // We disallow tags that are specific for MathML\n      // or SVG and should never appear in HTML namespace\n      return (\n        !ALL_MATHML_TAGS[tagName] &&\n        (COMMON_SVG_AND_HTML_ELEMENTS[tagName] || !ALL_SVG_TAGS[tagName])\n      );\n    }\n\n    // For XHTML and XML documents that support custom namespaces\n    if (\n      PARSER_MEDIA_TYPE === 'application/xhtml+xml' &&\n      ALLOWED_NAMESPACES[element.namespaceURI]\n    ) {\n      return true;\n    }\n\n    // The code should never reach this place (this means\n    // that the element somehow got namespace that is not\n    // HTML, SVG, MathML or allowed via ALLOWED_NAMESPACES).\n    // Return false just in case.\n    return false;\n  };\n\n  /**\n   * _forceRemove\n   *\n   * @param  {Node} node a DOM node\n   */\n  const _forceRemove = function (node) {\n    arrayPush(DOMPurify.removed, { element: node });\n    try {\n      // eslint-disable-next-line unicorn/prefer-dom-node-remove\n      node.parentNode.removeChild(node);\n    } catch (_) {\n      node.remove();\n    }\n  };\n\n  /**\n   * _removeAttribute\n   *\n   * @param  {String} name an Attribute name\n   * @param  {Node} node a DOM node\n   */\n  const _removeAttribute = function (name, node) {\n    try {\n      arrayPush(DOMPurify.removed, {\n        attribute: node.getAttributeNode(name),\n        from: node,\n      });\n    } catch (_) {\n      arrayPush(DOMPurify.removed, {\n        attribute: null,\n        from: node,\n      });\n    }\n\n    node.removeAttribute(name);\n\n    // We void attribute values for unremovable \"is\"\" attributes\n    if (name === 'is' && !ALLOWED_ATTR[name]) {\n      if (RETURN_DOM || RETURN_DOM_FRAGMENT) {\n        try {\n          _forceRemove(node);\n        } catch (_) {}\n      } else {\n        try {\n          node.setAttribute(name, '');\n        } catch (_) {}\n      }\n    }\n  };\n\n  /**\n   * _initDocument\n   *\n   * @param  {String} dirty a string of dirty markup\n   * @return {Document} a DOM, filled with the dirty markup\n   */\n  const _initDocument = function (dirty) {\n    /* Create a HTML document */\n    let doc;\n    let leadingWhitespace;\n\n    if (FORCE_BODY) {\n      dirty = '<remove></remove>' + dirty;\n    } else {\n      /* If FORCE_BODY isn't used, leading whitespace needs to be preserved manually */\n      const matches = stringMatch(dirty, /^[\\r\\n\\t ]+/);\n      leadingWhitespace = matches && matches[0];\n    }\n\n    if (\n      PARSER_MEDIA_TYPE === 'application/xhtml+xml' &&\n      NAMESPACE === HTML_NAMESPACE\n    ) {\n      // Root of XHTML doc must contain xmlns declaration (see https://www.w3.org/TR/xhtml1/normative.html#strict)\n      dirty =\n        '<html xmlns=\"http://www.w3.org/1999/xhtml\"><head></head><body>' +\n        dirty +\n        '</body></html>';\n    }\n\n    const dirtyPayload = trustedTypesPolicy\n      ? trustedTypesPolicy.createHTML(dirty)\n      : dirty;\n    /*\n     * Use the DOMParser API by default, fallback later if needs be\n     * DOMParser not work for svg when has multiple root element.\n     */\n    if (NAMESPACE === HTML_NAMESPACE) {\n      try {\n        doc = new DOMParser().parseFromString(dirtyPayload, PARSER_MEDIA_TYPE);\n      } catch (_) {}\n    }\n\n    /* Use createHTMLDocument in case DOMParser is not available */\n    if (!doc || !doc.documentElement) {\n      doc = implementation.createDocument(NAMESPACE, 'template', null);\n      try {\n        doc.documentElement.innerHTML = IS_EMPTY_INPUT\n          ? emptyHTML\n          : dirtyPayload;\n      } catch (_) {\n        // Syntax error if dirtyPayload is invalid xml\n      }\n    }\n\n    const body = doc.body || doc.documentElement;\n\n    if (dirty && leadingWhitespace) {\n      body.insertBefore(\n        document.createTextNode(leadingWhitespace),\n        body.childNodes[0] || null\n      );\n    }\n\n    /* Work on whole document or just its body */\n    if (NAMESPACE === HTML_NAMESPACE) {\n      return getElementsByTagName.call(\n        doc,\n        WHOLE_DOCUMENT ? 'html' : 'body'\n      )[0];\n    }\n\n    return WHOLE_DOCUMENT ? doc.documentElement : body;\n  };\n\n  /**\n   * _createIterator\n   *\n   * @param  {Document} root document/fragment to create iterator for\n   * @return {Iterator} iterator instance\n   */\n  const _createIterator = function (root) {\n    return createNodeIterator.call(\n      root.ownerDocument || root,\n      root,\n      // eslint-disable-next-line no-bitwise\n      NodeFilter.SHOW_ELEMENT | NodeFilter.SHOW_COMMENT | NodeFilter.SHOW_TEXT,\n      null,\n      false\n    );\n  };\n\n  /**\n   * _isClobbered\n   *\n   * @param  {Node} elm element to check for clobbering attacks\n   * @return {Boolean} true if clobbered, false if safe\n   */\n  const _isClobbered = function (elm) {\n    return (\n      elm instanceof HTMLFormElement &&\n      (typeof elm.nodeName !== 'string' ||\n        typeof elm.textContent !== 'string' ||\n        typeof elm.removeChild !== 'function' ||\n        !(elm.attributes instanceof NamedNodeMap) ||\n        typeof elm.removeAttribute !== 'function' ||\n        typeof elm.setAttribute !== 'function' ||\n        typeof elm.namespaceURI !== 'string' ||\n        typeof elm.insertBefore !== 'function' ||\n        typeof elm.hasChildNodes !== 'function')\n    );\n  };\n\n  /**\n   * _isNode\n   *\n   * @param  {Node} obj object to check whether it's a DOM node\n   * @return {Boolean} true is object is a DOM node\n   */\n  const _isNode = function (object) {\n    return typeof Node === 'object'\n      ? object instanceof Node\n      : object &&\n          typeof object === 'object' &&\n          typeof object.nodeType === 'number' &&\n          typeof object.nodeName === 'string';\n  };\n\n  /**\n   * _executeHook\n   * Execute user configurable hooks\n   *\n   * @param  {String} entryPoint  Name of the hook's entry point\n   * @param  {Node} currentNode node to work on with the hook\n   * @param  {Object} data additional hook parameters\n   */\n  const _executeHook = function (entryPoint, currentNode, data) {\n    if (!hooks[entryPoint]) {\n      return;\n    }\n\n    arrayForEach(hooks[entryPoint], (hook) => {\n      hook.call(DOMPurify, currentNode, data, CONFIG);\n    });\n  };\n\n  /**\n   * _sanitizeElements\n   *\n   * @protect nodeName\n   * @protect textContent\n   * @protect removeChild\n   *\n   * @param   {Node} currentNode to check for permission to exist\n   * @return  {Boolean} true if node was killed, false if left alive\n   */\n  const _sanitizeElements = function (currentNode) {\n    let content;\n\n    /* Execute a hook if present */\n    _executeHook('beforeSanitizeElements', currentNode, null);\n\n    /* Check if element is clobbered or can clobber */\n    if (_isClobbered(currentNode)) {\n      _forceRemove(currentNode);\n      return true;\n    }\n\n    /* Now let's check the element's type and name */\n    const tagName = transformCaseFunc(currentNode.nodeName);\n\n    /* Execute a hook if present */\n    _executeHook('uponSanitizeElement', currentNode, {\n      tagName,\n      allowedTags: ALLOWED_TAGS,\n    });\n\n    /* Detect mXSS attempts abusing namespace confusion */\n    if (\n      currentNode.hasChildNodes() &&\n      !_isNode(currentNode.firstElementChild) &&\n      (!_isNode(currentNode.content) ||\n        !_isNode(currentNode.content.firstElementChild)) &&\n      regExpTest(/<[/\\w]/g, currentNode.innerHTML) &&\n      regExpTest(/<[/\\w]/g, currentNode.textContent)\n    ) {\n      _forceRemove(currentNode);\n      return true;\n    }\n\n    /* Remove element if anything forbids its presence */\n    if (!ALLOWED_TAGS[tagName] || FORBID_TAGS[tagName]) {\n      /* Check if we have a custom element to handle */\n      if (!FORBID_TAGS[tagName] && _basicCustomElementTest(tagName)) {\n        if (\n          CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof RegExp &&\n          regExpTest(CUSTOM_ELEMENT_HANDLING.tagNameCheck, tagName)\n        )\n          return false;\n        if (\n          CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof Function &&\n          CUSTOM_ELEMENT_HANDLING.tagNameCheck(tagName)\n        )\n          return false;\n      }\n\n      /* Keep content except for bad-listed elements */\n      if (KEEP_CONTENT && !FORBID_CONTENTS[tagName]) {\n        const parentNode = getParentNode(currentNode) || currentNode.parentNode;\n        const childNodes = getChildNodes(currentNode) || currentNode.childNodes;\n\n        if (childNodes && parentNode) {\n          const childCount = childNodes.length;\n\n          for (let i = childCount - 1; i >= 0; --i) {\n            parentNode.insertBefore(\n              cloneNode(childNodes[i], true),\n              getNextSibling(currentNode)\n            );\n          }\n        }\n      }\n\n      _forceRemove(currentNode);\n      return true;\n    }\n\n    /* Check whether element has a valid namespace */\n    if (currentNode instanceof Element && !_checkValidNamespace(currentNode)) {\n      _forceRemove(currentNode);\n      return true;\n    }\n\n    /* Make sure that older browsers don't get noscript mXSS */\n    if (\n      (tagName === 'noscript' || tagName === 'noembed') &&\n      regExpTest(/<\\/no(script|embed)/i, currentNode.innerHTML)\n    ) {\n      _forceRemove(currentNode);\n      return true;\n    }\n\n    /* Sanitize element content to be template-safe */\n    if (SAFE_FOR_TEMPLATES && currentNode.nodeType === 3) {\n      /* Get the element's text content */\n      content = currentNode.textContent;\n      content = stringReplace(content, MUSTACHE_EXPR, ' ');\n      content = stringReplace(content, ERB_EXPR, ' ');\n      content = stringReplace(content, TMPLIT_EXPR, ' ');\n      if (currentNode.textContent !== content) {\n        arrayPush(DOMPurify.removed, { element: currentNode.cloneNode() });\n        currentNode.textContent = content;\n      }\n    }\n\n    /* Execute a hook if present */\n    _executeHook('afterSanitizeElements', currentNode, null);\n\n    return false;\n  };\n\n  /**\n   * _isValidAttribute\n   *\n   * @param  {string} lcTag Lowercase tag name of containing element.\n   * @param  {string} lcName Lowercase attribute name.\n   * @param  {string} value Attribute value.\n   * @return {Boolean} Returns true if `value` is valid, otherwise false.\n   */\n  // eslint-disable-next-line complexity\n  const _isValidAttribute = function (lcTag, lcName, value) {\n    /* Make sure attribute cannot clobber */\n    if (\n      SANITIZE_DOM &&\n      (lcName === 'id' || lcName === 'name') &&\n      (value in document || value in formElement)\n    ) {\n      return false;\n    }\n\n    /* Allow valid data-* attributes: At least one character after \"-\"\n        (https://html.spec.whatwg.org/multipage/dom.html#embedding-custom-non-visible-data-with-the-data-*-attributes)\n        XML-compatible (https://html.spec.whatwg.org/multipage/infrastructure.html#xml-compatible and http://www.w3.org/TR/xml/#d0e804)\n        We don't need to check the value; it's always URI safe. */\n    if (\n      ALLOW_DATA_ATTR &&\n      !FORBID_ATTR[lcName] &&\n      regExpTest(DATA_ATTR, lcName)\n    ) {\n      // This attribute is safe\n    } else if (ALLOW_ARIA_ATTR && regExpTest(ARIA_ATTR, lcName)) {\n      // This attribute is safe\n      /* Otherwise, check the name is permitted */\n    } else if (!ALLOWED_ATTR[lcName] || FORBID_ATTR[lcName]) {\n      if (\n        // First condition does a very basic check if a) it's basically a valid custom element tagname AND\n        // b) if the tagName passes whatever the user has configured for CUSTOM_ELEMENT_HANDLING.tagNameCheck\n        // and c) if the attribute name passes whatever the user has configured for CUSTOM_ELEMENT_HANDLING.attributeNameCheck\n        (_basicCustomElementTest(lcTag) &&\n          ((CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof RegExp &&\n            regExpTest(CUSTOM_ELEMENT_HANDLING.tagNameCheck, lcTag)) ||\n            (CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof Function &&\n              CUSTOM_ELEMENT_HANDLING.tagNameCheck(lcTag))) &&\n          ((CUSTOM_ELEMENT_HANDLING.attributeNameCheck instanceof RegExp &&\n            regExpTest(CUSTOM_ELEMENT_HANDLING.attributeNameCheck, lcName)) ||\n            (CUSTOM_ELEMENT_HANDLING.attributeNameCheck instanceof Function &&\n              CUSTOM_ELEMENT_HANDLING.attributeNameCheck(lcName)))) ||\n        // Alternative, second condition checks if it's an `is`-attribute, AND\n        // the value passes whatever the user has configured for CUSTOM_ELEMENT_HANDLING.tagNameCheck\n        (lcName === 'is' &&\n          CUSTOM_ELEMENT_HANDLING.allowCustomizedBuiltInElements &&\n          ((CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof RegExp &&\n            regExpTest(CUSTOM_ELEMENT_HANDLING.tagNameCheck, value)) ||\n            (CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof Function &&\n              CUSTOM_ELEMENT_HANDLING.tagNameCheck(value))))\n      ) {\n        // If user has supplied a regexp or function in CUSTOM_ELEMENT_HANDLING.tagNameCheck, we need to also allow derived custom elements using the same tagName test.\n        // Additionally, we need to allow attributes passing the CUSTOM_ELEMENT_HANDLING.attributeNameCheck user has configured, as custom elements can define these at their own discretion.\n      } else {\n        return false;\n      }\n      /* Check value is safe. First, is attr inert? If so, is safe */\n    } else if (URI_SAFE_ATTRIBUTES[lcName]) {\n      // This attribute is safe\n      /* Check no script, data or unknown possibly unsafe URI\n        unless we know URI values are safe for that attribute */\n    } else if (\n      regExpTest(IS_ALLOWED_URI, stringReplace(value, ATTR_WHITESPACE, ''))\n    ) {\n      // This attribute is safe\n      /* Keep image data URIs alive if src/xlink:href is allowed */\n      /* Further prevent gadget XSS for dynamically built script tags */\n    } else if (\n      (lcName === 'src' || lcName === 'xlink:href' || lcName === 'href') &&\n      lcTag !== 'script' &&\n      stringIndexOf(value, 'data:') === 0 &&\n      DATA_URI_TAGS[lcTag]\n    ) {\n      // This attribute is safe\n      /* Allow unknown protocols: This provides support for links that\n        are handled by protocol handlers which may be unknown ahead of\n        time, e.g. fb:, spotify: */\n    } else if (\n      ALLOW_UNKNOWN_PROTOCOLS &&\n      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currentNode to sanitize\n   */\n  const _sanitizeAttributes = function (currentNode) {\n    let attr;\n    let value;\n    let lcName;\n    let l;\n    /* Execute a hook if present */\n    _executeHook('beforeSanitizeAttributes', currentNode, null);\n\n    const { attributes } = currentNode;\n\n    /* Check if we have attributes; if not we might have a text node */\n    if (!attributes) {\n      return;\n    }\n\n    const hookEvent = {\n      attrName: '',\n      attrValue: '',\n      keepAttr: true,\n      allowedAttributes: ALLOWED_ATTR,\n    };\n    l = attributes.length;\n\n    /* Go backwards over all attributes; safely remove bad ones */\n    while (l--) {\n      attr = attributes[l];\n      const { name, namespaceURI } = attr;\n      value = name === 'value' ? attr.value : stringTrim(attr.value);\n      lcName = transformCaseFunc(name);\n\n      /* Execute a hook if present */\n      hookEvent.attrName = lcName;\n      hookEvent.attrValue = value;\n      hookEvent.keepAttr = true;\n      hookEvent.forceKeepAttr = undefined; // Allows developers to see this is a property they can set\n      _executeHook('uponSanitizeAttribute', currentNode, hookEvent);\n      value = hookEvent.attrValue;\n      /* Did the hooks approve of the attribute? */\n      if (hookEvent.forceKeepAttr) {\n        continue;\n      }\n\n      /* Remove attribute */\n      _removeAttribute(name, currentNode);\n\n      /* Did the hooks approve of the attribute? */\n      if (!hookEvent.keepAttr) {\n        continue;\n      }\n\n      /* Work around a security issue in jQuery 3.0 */\n      if (!ALLOW_SELF_CLOSE_IN_ATTR && regExpTest(/\\/>/i, value)) {\n        _removeAttribute(name, currentNode);\n        continue;\n      }\n\n      /* Sanitize attribute content to be template-safe */\n      if (SAFE_FOR_TEMPLATES) {\n        value = stringReplace(value, MUSTACHE_EXPR, ' ');\n        value = stringReplace(value, ERB_EXPR, ' ');\n        value = stringReplace(value, TMPLIT_EXPR, ' ');\n      }\n\n      /* Is `value` valid for this attribute? */\n      const lcTag = transformCaseFunc(currentNode.nodeName);\n      if (!_isValidAttribute(lcTag, lcName, value)) {\n        continue;\n      }\n\n      /* Full DOM Clobbering protection via namespace isolation,\n       * Prefix id and name attributes with `user-content-`\n       */\n      if (SANITIZE_NAMED_PROPS && (lcName === 'id' || lcName === 'name')) {\n        // Remove the attribute with this value\n        _removeAttribute(name, currentNode);\n\n        // Prefix the value and later re-create the attribute with the sanitized value\n        value = SANITIZE_NAMED_PROPS_PREFIX + value;\n      }\n\n      /* Handle attributes that require Trusted Types */\n      if (\n        trustedTypesPolicy &&\n        typeof trustedTypes === 'object' &&\n        typeof trustedTypes.getAttributeType === 'function'\n      ) {\n        if (namespaceURI) {\n          /* Namespaces are not yet supported, see https://bugs.chromium.org/p/chromium/issues/detail?id=1305293 */\n        } else {\n          switch (trustedTypes.getAttributeType(lcTag, lcName)) {\n            case 'TrustedHTML':\n              value = trustedTypesPolicy.createHTML(value);\n              break;\n            case 'TrustedScriptURL':\n              value = trustedTypesPolicy.createScriptURL(value);\n              break;\n            default:\n              break;\n          }\n        }\n      }\n\n      /* Handle invalid data-* attribute set by try-catching it */\n      try {\n        if (namespaceURI) {\n          currentNode.setAttributeNS(namespaceURI, name, value);\n        } else {\n          /* Fallback to setAttribute() for browser-unrecognized namespaces e.g. \"x-schema\". */\n          currentNode.setAttribute(name, value);\n        }\n\n        arrayPop(DOMPurify.removed);\n      } catch (_) {}\n    }\n\n    /* Execute a hook if present */\n    _executeHook('afterSanitizeAttributes', currentNode, null);\n  };\n\n  /**\n   * _sanitizeShadowDOM\n   *\n   * @param  {DocumentFragment} fragment to iterate over recursively\n   */\n  const _sanitizeShadowDOM = function (fragment) {\n    let shadowNode;\n    const shadowIterator = _createIterator(fragment);\n\n    /* Execute a hook if present */\n    _executeHook('beforeSanitizeShadowDOM', fragment, null);\n\n    while ((shadowNode = shadowIterator.nextNode())) {\n      /* Execute a hook if present */\n      _executeHook('uponSanitizeShadowNode', shadowNode, null);\n\n      /* Sanitize tags and elements */\n      if (_sanitizeElements(shadowNode)) {\n        continue;\n      }\n\n      /* Deep shadow DOM detected */\n      if (shadowNode.content instanceof DocumentFragment) {\n        _sanitizeShadowDOM(shadowNode.content);\n      }\n\n      /* Check attributes, sanitize if necessary */\n      _sanitizeAttributes(shadowNode);\n    }\n\n    /* Execute a hook if present */\n    _executeHook('afterSanitizeShadowDOM', fragment, null);\n  };\n\n  /**\n   * Sanitize\n   * Public method providing core sanitation functionality\n   *\n   * @param {String|Node} dirty string or DOM node\n   * @param {Object} configuration object\n   */\n  // eslint-disable-next-line complexity\n  DOMPurify.sanitize = function (dirty, cfg = {}) {\n    let body;\n    let importedNode;\n    let currentNode;\n    let returnNode;\n    /* Make sure we have a string to sanitize.\n      DO NOT return early, as this will return the wrong type if\n      the user has requested a DOM object rather than a string */\n    IS_EMPTY_INPUT = !dirty;\n    if (IS_EMPTY_INPUT) {\n      dirty = '<!-->';\n    }\n\n    /* Stringify, in case dirty is an object */\n    if (typeof dirty !== 'string' && !_isNode(dirty)) {\n      // eslint-disable-next-line no-negated-condition\n      if (typeof dirty.toString !== 'function') {\n        throw typeErrorCreate('toString is not a function');\n      } else {\n        dirty = dirty.toString();\n        if (typeof dirty !== 'string') {\n          throw typeErrorCreate('dirty is not a string, aborting');\n        }\n      }\n    }\n\n    /* Return dirty HTML if DOMPurify cannot run */\n    if (!DOMPurify.isSupported) {\n      return dirty;\n    }\n\n    /* Assign config vars */\n    if (!SET_CONFIG) {\n      _parseConfig(cfg);\n    }\n\n    /* Clean up removed elements */\n    DOMPurify.removed = [];\n\n    /* Check if dirty is correctly typed for IN_PLACE */\n    if (typeof dirty === 'string') {\n      IN_PLACE = false;\n    }\n\n    if (IN_PLACE) {\n      /* Do some early pre-sanitization to avoid unsafe root nodes */\n      if (dirty.nodeName) {\n        const tagName = transformCaseFunc(dirty.nodeName);\n        if (!ALLOWED_TAGS[tagName] || FORBID_TAGS[tagName]) {\n          throw typeErrorCreate(\n            'root node is forbidden and cannot be sanitized in-place'\n          );\n        }\n      }\n    } else if (dirty instanceof Node) {\n      /* If dirty is a DOM element, append to an empty document to avoid\n         elements being stripped by the parser */\n      body = _initDocument('<!---->');\n      importedNode = body.ownerDocument.importNode(dirty, true);\n      if (importedNode.nodeType === 1 && importedNode.nodeName === 'BODY') {\n        /* Node is already a body, use as is */\n        body = importedNode;\n      } else if (importedNode.nodeName === 'HTML') {\n        body = importedNode;\n      } else {\n        // eslint-disable-next-line unicorn/prefer-dom-node-append\n        body.appendChild(importedNode);\n      }\n    } else {\n      /* Exit directly if we have nothing to do */\n      if (\n        !RETURN_DOM &&\n        !SAFE_FOR_TEMPLATES &&\n        !WHOLE_DOCUMENT &&\n        // eslint-disable-next-line unicorn/prefer-includes\n        dirty.indexOf('<') === -1\n      ) {\n        return trustedTypesPolicy && RETURN_TRUSTED_TYPE\n          ? trustedTypesPolicy.createHTML(dirty)\n          : dirty;\n      }\n\n      /* Initialize the document to work on */\n      body = _initDocument(dirty);\n\n      /* Check we have a DOM node from the data */\n      if (!body) {\n        return RETURN_DOM ? null : RETURN_TRUSTED_TYPE ? emptyHTML : '';\n      }\n    }\n\n    /* Remove first element node (ours) if FORCE_BODY is set */\n    if (body && FORCE_BODY) {\n      _forceRemove(body.firstChild);\n    }\n\n    /* Get node iterator */\n    const nodeIterator = _createIterator(IN_PLACE ? dirty : body);\n\n    /* Now start iterating over the created document */\n    while ((currentNode = nodeIterator.nextNode())) {\n      /* Sanitize tags and elements */\n      if (_sanitizeElements(currentNode)) {\n        continue;\n      }\n\n      /* Shadow DOM detected, sanitize it */\n      if (currentNode.content instanceof DocumentFragment) {\n        _sanitizeShadowDOM(currentNode.content);\n      }\n\n      /* Check attributes, sanitize if necessary */\n      _sanitizeAttributes(currentNode);\n    }\n\n    /* If we sanitized `dirty` in-place, return it. */\n    if (IN_PLACE) {\n      return dirty;\n    }\n\n    /* Return sanitized string or DOM */\n    if (RETURN_DOM) {\n      if (RETURN_DOM_FRAGMENT) {\n        returnNode = createDocumentFragment.call(body.ownerDocument);\n\n        while (body.firstChild) {\n          // eslint-disable-next-line unicorn/prefer-dom-node-append\n          returnNode.appendChild(body.firstChild);\n        }\n      } else {\n        returnNode = body;\n      }\n\n      if (ALLOWED_ATTR.shadowroot || ALLOWED_ATTR.shadowrootmod) {\n        /*\n          AdoptNode() is not used because internal state is not reset\n          (e.g. the past names map of a HTMLFormElement), this is safe\n          in theory but we would rather not risk another attack vector.\n          The state that is cloned by importNode() is explicitly defined\n          by the specs.\n        */\n        returnNode = importNode.call(originalDocument, returnNode, true);\n      }\n\n      return returnNode;\n    }\n\n    let serializedHTML = WHOLE_DOCUMENT ? body.outerHTML : body.innerHTML;\n\n    /* Serialize doctype if allowed */\n    if (\n      WHOLE_DOCUMENT &&\n      ALLOWED_TAGS['!doctype'] &&\n      body.ownerDocument &&\n      body.ownerDocument.doctype &&\n      body.ownerDocument.doctype.name &&\n      regExpTest(EXPRESSIONS.DOCTYPE_NAME, body.ownerDocument.doctype.name)\n    ) {\n      serializedHTML =\n        '<!DOCTYPE ' + body.ownerDocument.doctype.name + '>\\n' + serializedHTML;\n    }\n\n    /* Sanitize final string template-safe */\n    if (SAFE_FOR_TEMPLATES) {\n      serializedHTML = stringReplace(serializedHTML, MUSTACHE_EXPR, ' ');\n      serializedHTML = stringReplace(serializedHTML, ERB_EXPR, ' ');\n      serializedHTML = stringReplace(serializedHTML, TMPLIT_EXPR, ' ');\n    }\n\n    return trustedTypesPolicy && RETURN_TRUSTED_TYPE\n      ? trustedTypesPolicy.createHTML(serializedHTML)\n      : serializedHTML;\n  };\n\n  /**\n   * Public method to set the configuration once\n   * setConfig\n   *\n   * @param {Object} cfg configuration object\n   */\n  DOMPurify.setConfig = function (cfg) {\n    _parseConfig(cfg);\n    SET_CONFIG = true;\n  };\n\n  /**\n   * Public method to remove the configuration\n   * clearConfig\n   *\n   */\n  DOMPurify.clearConfig = function () {\n    CONFIG = null;\n    SET_CONFIG = false;\n  };\n\n  /**\n   * Public method to check if an attribute value is valid.\n   * Uses last set config, if any. Otherwise, uses config defaults.\n   * isValidAttribute\n   *\n   * @param  {string} tag Tag name of containing element.\n   * @param  {string} attr Attribute name.\n   * @param  {string} value Attribute value.\n   * @return {Boolean} Returns true if `value` is valid. 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\ No newline at end of file

programming_language: JavaScript
filename: purify.min.js
change_type: ModificationType.ADD
diff: @@ -0,0 +1,3 @@
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diff: @@ -0,0 +1 @@
+{"version":3,"file":"purify.min.js","sources":["../src/utils.js","../src/tags.js","../src/attrs.js","../src/regexp.js","../src/purify.js"],"sourcesContent":["const {\n  entries,\n  setPrototypeOf,\n  isFrozen,\n  getPrototypeOf,\n  getOwnPropertyDescriptor,\n} = Object;\n\nlet { freeze, seal, create } = Object; // eslint-disable-line import/no-mutable-exports\nlet { apply, construct } = typeof Reflect !== 'undefined' && Reflect;\n\nif (!apply) {\n  apply = function (fun, thisValue, args) {\n    return fun.apply(thisValue, args);\n  };\n}\n\nif (!freeze) {\n  freeze = function (x) {\n    return x;\n  };\n}\n\nif (!seal) {\n  seal = function (x) {\n    return x;\n  };\n}\n\nif (!construct) {\n  construct = function (Func, args) {\n    return new Func(...args);\n  };\n}\n\nconst arrayForEach = unapply(Array.prototype.forEach);\nconst arrayIndexOf = unapply(Array.prototype.indexOf);\nconst arrayPop = unapply(Array.prototype.pop);\nconst arrayPush = unapply(Array.prototype.push);\nconst arraySlice = unapply(Array.prototype.slice);\n\nconst stringToLowerCase = unapply(String.prototype.toLowerCase);\nconst stringToString = unapply(String.prototype.toString);\nconst stringMatch = unapply(String.prototype.match);\nconst stringReplace = unapply(String.prototype.replace);\nconst stringIndexOf = unapply(String.prototype.indexOf);\nconst stringTrim = unapply(String.prototype.trim);\n\nconst regExpTest = unapply(RegExp.prototype.test);\n\nconst typeErrorCreate = unconstruct(TypeError);\n\nexport function unapply(func) {\n  return (thisArg, ...args) => apply(func, thisArg, args);\n}\n\nexport function unconstruct(func) {\n  return (...args) => construct(func, args);\n}\n\n/* Add properties to a lookup table */\nexport function addToSet(set, array, transformCaseFunc) {\n  transformCaseFunc = transformCaseFunc ? transformCaseFunc : stringToLowerCase;\n  if (setPrototypeOf) {\n    // Make 'in' and truthy checks like Boolean(set.constructor)\n    // independent of any properties defined on Object.prototype.\n    // Prevent prototype setters from intercepting set as a this value.\n    setPrototypeOf(set, null);\n  }\n\n  let l = array.length;\n  while (l--) {\n    let element = array[l];\n    if (typeof element === 'string') {\n      const lcElement = transformCaseFunc(element);\n      if (lcElement !== element) {\n        // Config presets (e.g. tags.js, attrs.js) are immutable.\n        if (!isFrozen(array)) {\n          array[l] = lcElement;\n        }\n\n        element = lcElement;\n      }\n    }\n\n    set[element] = true;\n  }\n\n  return set;\n}\n\n/* Shallow clone an object */\nexport function clone(object) {\n  const newObject = create(null);\n\n  for (const [property, value] of entries(object)) {\n    newObject[property] = value;\n  }\n\n  return newObject;\n}\n\n/* This method automatically checks if the prop is function\n * or getter and behaves accordingly. */\nfunction lookupGetter(object, prop) {\n  while (object !== null) {\n    const desc = getOwnPropertyDescriptor(object, prop);\n    if (desc) {\n      if (desc.get) {\n        return unapply(desc.get);\n      }\n\n      if (typeof desc.value === 'function') {\n        return unapply(desc.value);\n      }\n    }\n\n    object = getPrototypeOf(object);\n  }\n\n  function fallbackValue(element) {\n    console.warn('fallback value for', element);\n    return null;\n  }\n\n  return fallbackValue;\n}\n\nexport {\n  // Array\n  arrayForEach,\n  arrayIndexOf,\n  arrayPop,\n  arrayPush,\n  arraySlice,\n  // Object\n  entries,\n  freeze,\n  getPrototypeOf,\n  getOwnPropertyDescriptor,\n  isFrozen,\n  setPrototypeOf,\n  seal,\n  // RegExp\n  regExpTest,\n  // String\n  stringIndexOf,\n  stringMatch,\n  stringReplace,\n  stringToLowerCase,\n  stringToString,\n  stringTrim,\n  // Errors\n  typeErrorCreate,\n  // Other\n  lookupGetter,\n};\n","import { freeze } from './utils.js';\n\nexport const html = freeze([\n  'a',\n  'abbr',\n  'acronym',\n  'address',\n  'area',\n  'article',\n  'aside',\n  'audio',\n  'b',\n  'bdi',\n  'bdo',\n  'big',\n  'blink',\n  'blockquote',\n  'body',\n  'br',\n  'button',\n  'canvas',\n  'caption',\n  'center',\n  'cite',\n  'code',\n  'col',\n  'colgroup',\n  'content',\n  'data',\n  'datalist',\n  'dd',\n  'decorator',\n  'del',\n  'details',\n  'dfn',\n  'dialog',\n  'dir',\n  'div',\n  'dl',\n  'dt',\n  'element',\n  'em',\n  'fieldset',\n  'figcaption',\n  'figure',\n  'font',\n  'footer',\n  'form',\n  'h1',\n  'h2',\n  'h3',\n  'h4',\n  'h5',\n  'h6',\n  'head',\n  'header',\n  'hgroup',\n  'hr',\n  'html',\n  'i',\n  'img',\n  'input',\n  'ins',\n  'kbd',\n  'label',\n  'legend',\n  'li',\n  'main',\n  'map',\n  'mark',\n  'marquee',\n  'menu',\n  'menuitem',\n  'meter',\n  'nav',\n  'nobr',\n  'ol',\n  'optgroup',\n  'option',\n  'output',\n  'p',\n  'picture',\n  'pre',\n  'progress',\n  'q',\n  'rp',\n  'rt',\n  'ruby',\n  's',\n  'samp',\n  'section',\n  'select',\n  'shadow',\n  'small',\n  'source',\n  'spacer',\n  'span',\n  'strike',\n  'strong',\n  'style',\n  'sub',\n  'summary',\n  'sup',\n  'table',\n  'tbody',\n  'td',\n  'template',\n  'textarea',\n  'tfoot',\n  'th',\n  'thead',\n  'time',\n  'tr',\n  'track',\n  'tt',\n  'u',\n  'ul',\n  'var',\n  'video',\n  'wbr',\n]);\n\n// SVG\nexport const svg = freeze([\n  'svg',\n  'a',\n  'altglyph',\n  'altglyphdef',\n  'altglyphitem',\n  'animatecolor',\n  'animatemotion',\n  'animatetransform',\n  'circle',\n  'clippath',\n  'defs',\n  'desc',\n  'ellipse',\n  'filter',\n  'font',\n  'g',\n  'glyph',\n  'glyphref',\n  'hkern',\n  'image',\n  'line',\n  'lineargradient',\n  'marker',\n  'mask',\n  'metadata',\n  'mpath',\n  'path',\n  'pattern',\n  'polygon',\n  'polyline',\n  'radialgradient',\n  'rect',\n  'stop',\n  'style',\n  'switch',\n  'symbol',\n  'text',\n  'textpath',\n  'title',\n  'tref',\n  'tspan',\n  'view',\n  'vkern',\n]);\n\nexport const svgFilters = freeze([\n  'feBlend',\n  'feColorMatrix',\n  'feComponentTransfer',\n  'feComposite',\n  'feConvolveMatrix',\n  'feDiffuseLighting',\n  'feDisplacementMap',\n  'feDistantLight',\n  'feFlood',\n  'feFuncA',\n  'feFuncB',\n  'feFuncG',\n  'feFuncR',\n  'feGaussianBlur',\n  'feImage',\n  'feMerge',\n  'feMergeNode',\n  'feMorphology',\n  'feOffset',\n  'fePointLight',\n  'feSpecularLighting',\n  'feSpotLight',\n  'feTile',\n  'feTurbulence',\n]);\n\n// List of SVG elements that are disallowed by default.\n// We still need to know them so that we can do namespace\n// checks properly in case one wants to add them to\n// allow-list.\nexport const svgDisallowed = freeze([\n  'animate',\n  'color-profile',\n  'cursor',\n  'discard',\n  'fedropshadow',\n  'font-face',\n  'font-face-format',\n  'font-face-name',\n  'font-face-src',\n  'font-face-uri',\n  'foreignobject',\n  'hatch',\n  'hatchpath',\n  'mesh',\n  'meshgradient',\n  'meshpatch',\n  'meshrow',\n  'missing-glyph',\n  'script',\n  'set',\n  'solidcolor',\n  'unknown',\n  'use',\n]);\n\nexport const mathMl = freeze([\n  'math',\n  'menclose',\n  'merror',\n  'mfenced',\n  'mfrac',\n  'mglyph',\n  'mi',\n  'mlabeledtr',\n  'mmultiscripts',\n  'mn',\n  'mo',\n  'mover',\n  'mpadded',\n  'mphantom',\n  'mroot',\n  'mrow',\n  'ms',\n  'mspace',\n  'msqrt',\n  'mstyle',\n  'msub',\n  'msup',\n  'msubsup',\n  'mtable',\n  'mtd',\n  'mtext',\n  'mtr',\n  'munder',\n  'munderover',\n  'mprescripts',\n]);\n\n// Similarly to SVG, we want to know all MathML elements,\n// even those that we disallow by default.\nexport const mathMlDisallowed = freeze([\n  'maction',\n  'maligngroup',\n  'malignmark',\n  'mlongdiv',\n  'mscarries',\n  'mscarry',\n  'msgroup',\n  'mstack',\n  'msline',\n  'msrow',\n  'semantics',\n  'annotation',\n  'annotation-xml',\n  'mprescripts',\n  'none',\n]);\n\nexport const text = freeze(['#text']);\n","import { freeze } from './utils.js';\n\nexport const html = freeze([\n  'accept',\n  'action',\n  'align',\n  'alt',\n  'autocapitalize',\n  'autocomplete',\n  'autopictureinpicture',\n  'autoplay',\n  'background',\n  'bgcolor',\n  'border',\n  'capture',\n  'cellpadding',\n  'cellspacing',\n  'checked',\n  'cite',\n  'class',\n  'clear',\n  'color',\n  'cols',\n  'colspan',\n  'controls',\n  'controlslist',\n  'coords',\n  'crossorigin',\n  'datetime',\n  'decoding',\n  'default',\n  'dir',\n  'disabled',\n  'disablepictureinpicture',\n  'disableremoteplayback',\n  'download',\n  'draggable',\n  'enctype',\n  'enterkeyhint',\n  'face',\n  'for',\n  'headers',\n  'height',\n  'hidden',\n  'high',\n  'href',\n  'hreflang',\n  'id',\n  'inputmode',\n  'integrity',\n  'ismap',\n  'kind',\n  'label',\n  'lang',\n  'list',\n  'loading',\n  'loop',\n  'low',\n  'max',\n  'maxlength',\n  'media',\n  'method',\n  'min',\n  'minlength',\n  'multiple',\n  'muted',\n  'name',\n  'nonce',\n  'noshade',\n  'novalidate',\n  'nowrap',\n  'open',\n  'optimum',\n  'pattern',\n  'placeholder',\n  'playsinline',\n  'poster',\n  'preload',\n  'pubdate',\n  'radiogroup',\n  'readonly',\n  'rel',\n  'required',\n  'rev',\n  'reversed',\n  'role',\n  'rows',\n  'rowspan',\n  'spellcheck',\n  'scope',\n  'selected',\n  'shape',\n  'size',\n  'sizes',\n  'span',\n  'srclang',\n  'start',\n  'src',\n  'srcset',\n  'step',\n  'style',\n  'summary',\n  'tabindex',\n  'title',\n  'translate',\n  'type',\n  'usemap',\n  'valign',\n  'value',\n  'width',\n  'xmlns',\n  'slot',\n]);\n\nexport const svg = freeze([\n  'accent-height',\n  'accumulate',\n  'additive',\n  'alignment-baseline',\n  'ascent',\n  'attributename',\n  'attributetype',\n  'azimuth',\n  'basefrequency',\n  'baseline-shift',\n  'begin',\n  'bias',\n  'by',\n  'class',\n  'clip',\n  'clippathunits',\n  'clip-path',\n  'clip-rule',\n  'color',\n  'color-interpolation',\n  'color-interpolation-filters',\n  'color-profile',\n  'color-rendering',\n  'cx',\n  'cy',\n  'd',\n  'dx',\n  'dy',\n  'diffuseconstant',\n  'direction',\n  'display',\n  'divisor',\n  'dur',\n  'edgemode',\n  'elevation',\n  'end',\n  'fill',\n  'fill-opacity',\n  'fill-rule',\n  'filter',\n  'filterunits',\n  'flood-color',\n  'flood-opacity',\n  'font-family',\n  'font-size',\n  'font-size-adjust',\n  'font-stretch',\n  'font-style',\n  'font-variant',\n  'font-weight',\n  'fx',\n  'fy',\n  'g1',\n  'g2',\n  'glyph-name',\n  'glyphref',\n  'gradientunits',\n  'gradienttransform',\n  'height',\n  'href',\n  'id',\n  'image-rendering',\n  'in',\n  'in2',\n  'k',\n  'k1',\n  'k2',\n  'k3',\n  'k4',\n  'kerning',\n  'keypoints',\n  'keysplines',\n  'keytimes',\n  'lang',\n  'lengthadjust',\n  'letter-spacing',\n  'kernelmatrix',\n  'kernelunitlength',\n  'lighting-color',\n  'local',\n  'marker-end',\n  'marker-mid',\n  'marker-start',\n  'markerheight',\n  'markerunits',\n  'markerwidth',\n  'maskcontentunits',\n  'maskunits',\n  'max',\n  'mask',\n  'media',\n  'method',\n  'mode',\n  'min',\n  'name',\n  'numoctaves',\n  'offset',\n  'operator',\n  'opacity',\n  'order',\n  'orient',\n  'orientation',\n  'origin',\n  'overflow',\n  'paint-order',\n  'path',\n  'pathlength',\n  'patterncontentunits',\n  'patterntransform',\n  'patternunits',\n  'points',\n  'preservealpha',\n  'preserveaspectratio',\n  'primitiveunits',\n  'r',\n  'rx',\n  'ry',\n  'radius',\n  'refx',\n  'refy',\n  'repeatcount',\n  'repeatdur',\n  'restart',\n  'result',\n  'rotate',\n  'scale',\n  'seed',\n  'shape-rendering',\n  'specularconstant',\n  'specularexponent',\n  'spreadmethod',\n  'startoffset',\n  'stddeviation',\n  'stitchtiles',\n  'stop-color',\n  'stop-opacity',\n  'stroke-dasharray',\n  'stroke-dashoffset',\n  'stroke-linecap',\n  'stroke-linejoin',\n  'stroke-miterlimit',\n  'stroke-opacity',\n  'stroke',\n  'stroke-width',\n  'style',\n  'surfacescale',\n  'systemlanguage',\n  'tabindex',\n  'targetx',\n  'targety',\n  'transform',\n  'transform-origin',\n  'text-anchor',\n  'text-decoration',\n  'text-rendering',\n  'textlength',\n  'type',\n  'u1',\n  'u2',\n  'unicode',\n  'values',\n  'viewbox',\n  'visibility',\n  'version',\n  'vert-adv-y',\n  'vert-origin-x',\n  'vert-origin-y',\n  'width',\n  'word-spacing',\n  'wrap',\n  'writing-mode',\n  'xchannelselector',\n  'ychannelselector',\n  'x',\n  'x1',\n  'x2',\n  'xmlns',\n  'y',\n  'y1',\n  'y2',\n  'z',\n  'zoomandpan',\n]);\n\nexport const mathMl = freeze([\n  'accent',\n  'accentunder',\n  'align',\n  'bevelled',\n  'close',\n  'columnsalign',\n  'columnlines',\n  'columnspan',\n  'denomalign',\n  'depth',\n  'dir',\n  'display',\n  'displaystyle',\n  'encoding',\n  'fence',\n  'frame',\n  'height',\n  'href',\n  'id',\n  'largeop',\n  'length',\n  'linethickness',\n  'lspace',\n  'lquote',\n  'mathbackground',\n  'mathcolor',\n  'mathsize',\n  'mathvariant',\n  'maxsize',\n  'minsize',\n  'movablelimits',\n  'notation',\n  'numalign',\n  'open',\n  'rowalign',\n  'rowlines',\n  'rowspacing',\n  'rowspan',\n  'rspace',\n  'rquote',\n  'scriptlevel',\n  'scriptminsize',\n  'scriptsizemultiplier',\n  'selection',\n  'separator',\n  'separators',\n  'stretchy',\n  'subscriptshift',\n  'supscriptshift',\n  'symmetric',\n  'voffset',\n  'width',\n  'xmlns',\n]);\n\nexport const xml = freeze([\n  'xlink:href',\n  'xml:id',\n  'xlink:title',\n  'xml:space',\n  'xmlns:xlink',\n]);\n","import { seal } from './utils.js';\n\n// eslint-disable-next-line unicorn/better-regex\nexport const MUSTACHE_EXPR = seal(/\\{\\{[\\w\\W]*|[\\w\\W]*\\}\\}/gm); // Specify template detection regex for SAFE_FOR_TEMPLATES mode\nexport const ERB_EXPR = seal(/<%[\\w\\W]*|[\\w\\W]*%>/gm);\nexport const TMPLIT_EXPR = seal(/\\${[\\w\\W]*}/gm);\nexport const DATA_ATTR = seal(/^data-[\\-\\w.\\u00B7-\\uFFFF]/); // eslint-disable-line no-useless-escape\nexport const ARIA_ATTR = seal(/^aria-[\\-\\w]+$/); // eslint-disable-line no-useless-escape\nexport const IS_ALLOWED_URI = seal(\n  /^(?:(?:(?:f|ht)tps?|mailto|tel|callto|sms|cid|xmpp):|[^a-z]|[a-z+.\\-]+(?:[^a-z+.\\-:]|$))/i // eslint-disable-line no-useless-escape\n);\nexport const IS_SCRIPT_OR_DATA = seal(/^(?:\\w+script|data):/i);\nexport const ATTR_WHITESPACE = seal(\n  /[\\u0000-\\u0020\\u00A0\\u1680\\u180E\\u2000-\\u2029\\u205F\\u3000]/g // eslint-disable-line no-control-regex\n);\nexport const DOCTYPE_NAME = seal(/^html$/i);\n","import * as TAGS from './tags.js';\nimport * as ATTRS from './attrs.js';\nimport * as EXPRESSIONS from './regexp.js';\nimport {\n  addToSet,\n  clone,\n  entries,\n  freeze,\n  arrayForEach,\n  arrayPop,\n  arrayPush,\n  stringMatch,\n  stringReplace,\n  stringToLowerCase,\n  stringToString,\n  stringIndexOf,\n  stringTrim,\n  regExpTest,\n  typeErrorCreate,\n  lookupGetter,\n} from './utils.js';\n\nconst getGlobal = () => (typeof window === 'undefined' ? null : window);\n\n/**\n * Creates a no-op policy for internal use only.\n * Don't export this function outside this module!\n * @param {?TrustedTypePolicyFactory} trustedTypes The policy factory.\n * @param {Document} document The document object (to determine policy name suffix)\n * @return {?TrustedTypePolicy} The policy created (or null, if Trusted Types\n * are not supported).\n */\nconst _createTrustedTypesPolicy = function (trustedTypes, document) {\n  if (\n    typeof trustedTypes !== 'object' ||\n    typeof trustedTypes.createPolicy !== 'function'\n  ) {\n    return null;\n  }\n\n  // Allow the callers to control the unique policy name\n  // by adding a data-tt-policy-suffix to the script element with the DOMPurify.\n  // Policy creation with duplicate names throws in Trusted Types.\n  let suffix = null;\n  const ATTR_NAME = 'data-tt-policy-suffix';\n  if (\n    document.currentScript &&\n    document.currentScript.hasAttribute(ATTR_NAME)\n  ) {\n    suffix = document.currentScript.getAttribute(ATTR_NAME);\n  }\n\n  const policyName = 'dompurify' + (suffix ? '#' + suffix : '');\n\n  try {\n    return trustedTypes.createPolicy(policyName, {\n      createHTML(html) {\n        return html;\n      },\n      createScriptURL(scriptUrl) {\n        return scriptUrl;\n      },\n    });\n  } catch (_) {\n    // Policy creation failed (most likely another DOMPurify script has\n    // already run). Skip creating the policy, as this will only cause errors\n    // if TT are enforced.\n    console.warn(\n      'TrustedTypes policy ' + policyName + ' could not be created.'\n    );\n    return null;\n  }\n};\n\nfunction createDOMPurify(window = getGlobal()) {\n  const DOMPurify = (root) => createDOMPurify(root);\n\n  /**\n   * Version label, exposed for easier checks\n   * if DOMPurify is up to date or not\n   */\n  DOMPurify.version = VERSION;\n\n  /**\n   * Array of elements that DOMPurify removed during sanitation.\n   * Empty if nothing was removed.\n   */\n  DOMPurify.removed = [];\n\n  if (!window || !window.document || window.document.nodeType !== 9) {\n    // Not running in a browser, provide a factory function\n    // so that you can pass your own Window\n    DOMPurify.isSupported = false;\n\n    return DOMPurify;\n  }\n\n  const originalDocument = window.document;\n\n  let { document } = window;\n  const {\n    DocumentFragment,\n    HTMLTemplateElement,\n    Node,\n    Element,\n    NodeFilter,\n    NamedNodeMap = window.NamedNodeMap || window.MozNamedAttrMap,\n    HTMLFormElement,\n    DOMParser,\n    trustedTypes,\n  } = window;\n\n  const ElementPrototype = Element.prototype;\n\n  const cloneNode = lookupGetter(ElementPrototype, 'cloneNode');\n  const getNextSibling = lookupGetter(ElementPrototype, 'nextSibling');\n  const getChildNodes = lookupGetter(ElementPrototype, 'childNodes');\n  const getParentNode = lookupGetter(ElementPrototype, 'parentNode');\n\n  // As per issue #47, the web-components registry is inherited by a\n  // new document created via createHTMLDocument. As per the spec\n  // (http://w3c.github.io/webcomponents/spec/custom/#creating-and-passing-registries)\n  // a new empty registry is used when creating a template contents owner\n  // document, so we use that as our parent document to ensure nothing\n  // is inherited.\n  if (typeof HTMLTemplateElement === 'function') {\n    const template = document.createElement('template');\n    if (template.content && template.content.ownerDocument) {\n      document = template.content.ownerDocument;\n    }\n  }\n\n  const trustedTypesPolicy = _createTrustedTypesPolicy(\n    trustedTypes,\n    originalDocument\n  );\n  const emptyHTML = trustedTypesPolicy ? trustedTypesPolicy.createHTML('') : '';\n\n  const {\n    implementation,\n    createNodeIterator,\n    createDocumentFragment,\n    getElementsByTagName,\n  } = document;\n  const { importNode } = originalDocument;\n\n  let hooks = {};\n\n  /**\n   * Expose whether this browser supports running the full DOMPurify.\n   */\n  DOMPurify.isSupported =\n    typeof entries === 'function' &&\n    typeof getParentNode === 'function' &&\n    implementation &&\n    typeof implementation.createHTMLDocument !== 'undefined';\n\n  const {\n    MUSTACHE_EXPR,\n    ERB_EXPR,\n    TMPLIT_EXPR,\n    DATA_ATTR,\n    ARIA_ATTR,\n    IS_SCRIPT_OR_DATA,\n    ATTR_WHITESPACE,\n  } = EXPRESSIONS;\n\n  let { IS_ALLOWED_URI } = EXPRESSIONS;\n\n  /**\n   * We consider the elements and attributes below to be safe. Ideally\n   * don't add any new ones but feel free to remove unwanted ones.\n   */\n\n  /* allowed element names */\n  let ALLOWED_TAGS = null;\n  const DEFAULT_ALLOWED_TAGS = addToSet({}, [\n    ...TAGS.html,\n    ...TAGS.svg,\n    ...TAGS.svgFilters,\n    ...TAGS.mathMl,\n    ...TAGS.text,\n  ]);\n\n  /* Allowed attribute names */\n  let ALLOWED_ATTR = null;\n  const DEFAULT_ALLOWED_ATTR = addToSet({}, [\n    ...ATTRS.html,\n    ...ATTRS.svg,\n    ...ATTRS.mathMl,\n    ...ATTRS.xml,\n  ]);\n\n  /*\n   * Configure how DOMPUrify should handle custom elements and their attributes as well as customized built-in elements.\n   * @property {RegExp|Function|null} tagNameCheck one of [null, regexPattern, predicate]. Default: `null` (disallow any custom elements)\n   * @property {RegExp|Function|null} attributeNameCheck one of [null, regexPattern, predicate]. Default: `null` (disallow any attributes not on the allow list)\n   * @property {boolean} allowCustomizedBuiltInElements allow custom elements derived from built-ins if they pass CUSTOM_ELEMENT_HANDLING.tagNameCheck. Default: `false`.\n   */\n  let CUSTOM_ELEMENT_HANDLING = Object.seal(\n    Object.create(null, {\n      tagNameCheck: {\n        writable: true,\n        configurable: false,\n        enumerable: true,\n        value: null,\n      },\n      attributeNameCheck: {\n        writable: true,\n        configurable: false,\n        enumerable: true,\n        value: null,\n      },\n      allowCustomizedBuiltInElements: {\n        writable: true,\n        configurable: false,\n        enumerable: true,\n        value: false,\n      },\n    })\n  );\n\n  /* Explicitly forbidden tags (overrides ALLOWED_TAGS/ADD_TAGS) */\n  let FORBID_TAGS = null;\n\n  /* Explicitly forbidden attributes (overrides ALLOWED_ATTR/ADD_ATTR) */\n  let FORBID_ATTR = null;\n\n  /* Decide if ARIA attributes are okay */\n  let ALLOW_ARIA_ATTR = true;\n\n  /* Decide if custom data attributes are okay */\n  let ALLOW_DATA_ATTR = true;\n\n  /* Decide if unknown protocols are okay */\n  let ALLOW_UNKNOWN_PROTOCOLS = false;\n\n  /* Decide if self-closing tags in attributes are allowed.\n   * Usually removed due to a mXSS issue in jQuery 3.0 */\n  let ALLOW_SELF_CLOSE_IN_ATTR = true;\n\n  /* Output should be safe for common template engines.\n   * This means, DOMPurify removes data attributes, mustaches and ERB\n   */\n  let SAFE_FOR_TEMPLATES = false;\n\n  /* Decide if document with <html>... should be returned */\n  let WHOLE_DOCUMENT = false;\n\n  /* Track whether config is already set on this instance of DOMPurify. */\n  let SET_CONFIG = false;\n\n  /* Decide if all elements (e.g. style, script) must be children of\n   * document.body. By default, browsers might move them to document.head */\n  let FORCE_BODY = false;\n\n  /* Decide if a DOM `HTMLBodyElement` should be returned, instead of a html\n   * string (or a TrustedHTML object if Trusted Types are supported).\n   * If `WHOLE_DOCUMENT` is enabled a `HTMLHtmlElement` will be returned instead\n   */\n  let RETURN_DOM = false;\n\n  /* Decide if a DOM `DocumentFragment` should be returned, instead of a html\n   * string  (or a TrustedHTML object if Trusted Types are supported) */\n  let RETURN_DOM_FRAGMENT = false;\n\n  /* Try to return a Trusted Type object instead of a string, return a string in\n   * case Trusted Types are not supported  */\n  let RETURN_TRUSTED_TYPE = false;\n\n  /* Output should be free from DOM clobbering attacks?\n   * This sanitizes markups named with colliding, clobberable built-in DOM APIs.\n   */\n  let SANITIZE_DOM = true;\n\n  /* Achieve full DOM Clobbering protection by isolating the namespace of named\n   * properties and JS variables, mitigating attacks that abuse the HTML/DOM spec rules.\n   *\n   * HTML/DOM spec rules that enable DOM Clobbering:\n   *   - Named Access on Window (§7.3.3)\n   *   - DOM Tree Accessors (§3.1.5)\n   *   - Form Element Parent-Child Relations (§4.10.3)\n   *   - Iframe srcdoc / Nested WindowProxies (§4.8.5)\n   *   - HTMLCollection (§4.2.10.2)\n   *\n   * Namespace isolation is implemented by prefixing `id` and `name` attributes\n   * with a constant string, i.e., `user-content-`\n   */\n  let SANITIZE_NAMED_PROPS = false;\n  const SANITIZE_NAMED_PROPS_PREFIX = 'user-content-';\n\n  /* Keep element content when removing element? */\n  let KEEP_CONTENT = true;\n\n  /* If a `Node` is passed to sanitize(), then performs sanitization in-place instead\n   * of importing it into a new Document and returning a sanitized copy */\n  let IN_PLACE = false;\n\n  /* Allow usage of profiles like html, svg and mathMl */\n  let USE_PROFILES = {};\n\n  /* Tags to ignore content of when KEEP_CONTENT is true */\n  let FORBID_CONTENTS = null;\n  const DEFAULT_FORBID_CONTENTS = addToSet({}, [\n    'annotation-xml',\n    'audio',\n    'colgroup',\n    'desc',\n    'foreignobject',\n    'head',\n    'iframe',\n    'math',\n    'mi',\n    'mn',\n    'mo',\n    'ms',\n    'mtext',\n    'noembed',\n    'noframes',\n    'noscript',\n    'plaintext',\n    'script',\n    'style',\n    'svg',\n    'template',\n    'thead',\n    'title',\n    'video',\n    'xmp',\n  ]);\n\n  /* Tags that are safe for data: URIs */\n  let DATA_URI_TAGS = null;\n  const DEFAULT_DATA_URI_TAGS = addToSet({}, [\n    'audio',\n    'video',\n    'img',\n    'source',\n    'image',\n    'track',\n  ]);\n\n  /* Attributes safe for values like \"javascript:\" */\n  let URI_SAFE_ATTRIBUTES = null;\n  const DEFAULT_URI_SAFE_ATTRIBUTES = addToSet({}, [\n    'alt',\n    'class',\n    'for',\n    'id',\n    'label',\n    'name',\n    'pattern',\n    'placeholder',\n    'role',\n    'summary',\n    'title',\n    'value',\n    'style',\n    'xmlns',\n  ]);\n\n  const MATHML_NAMESPACE = 'http://www.w3.org/1998/Math/MathML';\n  const SVG_NAMESPACE = 'http://www.w3.org/2000/svg';\n  const HTML_NAMESPACE = 'http://www.w3.org/1999/xhtml';\n  /* Document namespace */\n  let NAMESPACE = HTML_NAMESPACE;\n  let IS_EMPTY_INPUT = false;\n\n  /* Allowed XHTML+XML namespaces */\n  let ALLOWED_NAMESPACES = null;\n  const DEFAULT_ALLOWED_NAMESPACES = addToSet(\n    {},\n    [MATHML_NAMESPACE, SVG_NAMESPACE, HTML_NAMESPACE],\n    stringToString\n  );\n\n  /* Parsing of strict XHTML documents */\n  let PARSER_MEDIA_TYPE;\n  const SUPPORTED_PARSER_MEDIA_TYPES = ['application/xhtml+xml', 'text/html'];\n  const DEFAULT_PARSER_MEDIA_TYPE = 'text/html';\n  let transformCaseFunc;\n\n  /* Keep a reference to config to pass to hooks */\n  let CONFIG = null;\n\n  /* Ideally, do not touch anything below this line */\n  /* ______________________________________________ */\n\n  const formElement = document.createElement('form');\n\n  const isRegexOrFunction = function (testValue) {\n    return testValue instanceof RegExp || testValue instanceof Function;\n  };\n\n  /**\n   * _parseConfig\n   *\n   * @param  {Object} cfg optional config literal\n   */\n  // eslint-disable-next-line complexity\n  const _parseConfig = function (cfg) {\n    if (CONFIG && CONFIG === cfg) {\n      return;\n    }\n\n    /* Shield configuration object from tampering */\n    if (!cfg || typeof cfg !== 'object') {\n      cfg = {};\n    }\n\n    /* Shield configuration object from prototype pollution */\n    cfg = clone(cfg);\n\n    PARSER_MEDIA_TYPE =\n      // eslint-disable-next-line unicorn/prefer-includes\n      SUPPORTED_PARSER_MEDIA_TYPES.indexOf(cfg.PARSER_MEDIA_TYPE) === -1\n        ? (PARSER_MEDIA_TYPE = DEFAULT_PARSER_MEDIA_TYPE)\n        : (PARSER_MEDIA_TYPE = cfg.PARSER_MEDIA_TYPE);\n\n    // HTML tags and attributes are not case-sensitive, converting to lowercase. Keeping XHTML as is.\n    transformCaseFunc =\n      PARSER_MEDIA_TYPE === 'application/xhtml+xml'\n        ? stringToString\n        : stringToLowerCase;\n\n    /* Set configuration parameters */\n    ALLOWED_TAGS =\n      'ALLOWED_TAGS' in cfg\n        ? addToSet({}, cfg.ALLOWED_TAGS, transformCaseFunc)\n        : DEFAULT_ALLOWED_TAGS;\n    ALLOWED_ATTR =\n      'ALLOWED_ATTR' in cfg\n        ? addToSet({}, cfg.ALLOWED_ATTR, transformCaseFunc)\n        : DEFAULT_ALLOWED_ATTR;\n    ALLOWED_NAMESPACES =\n      'ALLOWED_NAMESPACES' in cfg\n        ? addToSet({}, cfg.ALLOWED_NAMESPACES, stringToString)\n        : DEFAULT_ALLOWED_NAMESPACES;\n    URI_SAFE_ATTRIBUTES =\n      'ADD_URI_SAFE_ATTR' in cfg\n        ? addToSet(\n            clone(DEFAULT_URI_SAFE_ATTRIBUTES), // eslint-disable-line indent\n            cfg.ADD_URI_SAFE_ATTR, // eslint-disable-line indent\n            transformCaseFunc // eslint-disable-line indent\n          ) // eslint-disable-line indent\n        : DEFAULT_URI_SAFE_ATTRIBUTES;\n    DATA_URI_TAGS =\n      'ADD_DATA_URI_TAGS' in cfg\n        ? addToSet(\n            clone(DEFAULT_DATA_URI_TAGS), // eslint-disable-line indent\n            cfg.ADD_DATA_URI_TAGS, // eslint-disable-line indent\n            transformCaseFunc // eslint-disable-line indent\n          ) // eslint-disable-line indent\n        : DEFAULT_DATA_URI_TAGS;\n    FORBID_CONTENTS =\n      'FORBID_CONTENTS' in cfg\n        ? addToSet({}, cfg.FORBID_CONTENTS, transformCaseFunc)\n        : DEFAULT_FORBID_CONTENTS;\n    FORBID_TAGS =\n      'FORBID_TAGS' in cfg\n        ? addToSet({}, cfg.FORBID_TAGS, transformCaseFunc)\n        : {};\n    FORBID_ATTR =\n      'FORBID_ATTR' in cfg\n        ? addToSet({}, cfg.FORBID_ATTR, transformCaseFunc)\n        : {};\n    USE_PROFILES = 'USE_PROFILES' in cfg ? cfg.USE_PROFILES : false;\n    ALLOW_ARIA_ATTR = cfg.ALLOW_ARIA_ATTR !== false; // Default true\n    ALLOW_DATA_ATTR = cfg.ALLOW_DATA_ATTR !== false; // Default true\n    ALLOW_UNKNOWN_PROTOCOLS = cfg.ALLOW_UNKNOWN_PROTOCOLS || false; // Default false\n    ALLOW_SELF_CLOSE_IN_ATTR = cfg.ALLOW_SELF_CLOSE_IN_ATTR !== false; // Default true\n    SAFE_FOR_TEMPLATES = cfg.SAFE_FOR_TEMPLATES || false; // Default false\n    WHOLE_DOCUMENT = cfg.WHOLE_DOCUMENT || false; // Default false\n    RETURN_DOM = cfg.RETURN_DOM || false; // Default false\n    RETURN_DOM_FRAGMENT = cfg.RETURN_DOM_FRAGMENT || false; // Default false\n    RETURN_TRUSTED_TYPE = cfg.RETURN_TRUSTED_TYPE || false; // Default false\n    FORCE_BODY = cfg.FORCE_BODY || false; // Default false\n    SANITIZE_DOM = cfg.SANITIZE_DOM !== false; // Default true\n    SANITIZE_NAMED_PROPS = cfg.SANITIZE_NAMED_PROPS || false; // Default false\n    KEEP_CONTENT = cfg.KEEP_CONTENT !== false; // Default true\n    IN_PLACE = cfg.IN_PLACE || false; // Default false\n    IS_ALLOWED_URI = cfg.ALLOWED_URI_REGEXP || EXPRESSIONS.IS_ALLOWED_URI;\n    NAMESPACE = cfg.NAMESPACE || HTML_NAMESPACE;\n    CUSTOM_ELEMENT_HANDLING = cfg.CUSTOM_ELEMENT_HANDLING || {};\n    if (\n      cfg.CUSTOM_ELEMENT_HANDLING &&\n      isRegexOrFunction(cfg.CUSTOM_ELEMENT_HANDLING.tagNameCheck)\n    ) {\n      CUSTOM_ELEMENT_HANDLING.tagNameCheck =\n        cfg.CUSTOM_ELEMENT_HANDLING.tagNameCheck;\n    }\n\n    if (\n      cfg.CUSTOM_ELEMENT_HANDLING &&\n      isRegexOrFunction(cfg.CUSTOM_ELEMENT_HANDLING.attributeNameCheck)\n    ) {\n      CUSTOM_ELEMENT_HANDLING.attributeNameCheck =\n        cfg.CUSTOM_ELEMENT_HANDLING.attributeNameCheck;\n    }\n\n    if (\n      cfg.CUSTOM_ELEMENT_HANDLING &&\n      typeof cfg.CUSTOM_ELEMENT_HANDLING.allowCustomizedBuiltInElements ===\n        'boolean'\n    ) {\n      CUSTOM_ELEMENT_HANDLING.allowCustomizedBuiltInElements =\n        cfg.CUSTOM_ELEMENT_HANDLING.allowCustomizedBuiltInElements;\n    }\n\n    if (SAFE_FOR_TEMPLATES) {\n      ALLOW_DATA_ATTR = false;\n    }\n\n    if (RETURN_DOM_FRAGMENT) {\n      RETURN_DOM = true;\n    }\n\n    /* Parse profile info */\n    if (USE_PROFILES) {\n      ALLOWED_TAGS = addToSet({}, [...TAGS.text]);\n      ALLOWED_ATTR = [];\n      if (USE_PROFILES.html === true) {\n        addToSet(ALLOWED_TAGS, TAGS.html);\n        addToSet(ALLOWED_ATTR, ATTRS.html);\n      }\n\n      if (USE_PROFILES.svg === true) {\n        addToSet(ALLOWED_TAGS, TAGS.svg);\n        addToSet(ALLOWED_ATTR, ATTRS.svg);\n        addToSet(ALLOWED_ATTR, ATTRS.xml);\n      }\n\n      if (USE_PROFILES.svgFilters === true) {\n        addToSet(ALLOWED_TAGS, TAGS.svgFilters);\n        addToSet(ALLOWED_ATTR, ATTRS.svg);\n        addToSet(ALLOWED_ATTR, ATTRS.xml);\n      }\n\n      if (USE_PROFILES.mathMl === true) {\n        addToSet(ALLOWED_TAGS, TAGS.mathMl);\n        addToSet(ALLOWED_ATTR, ATTRS.mathMl);\n        addToSet(ALLOWED_ATTR, ATTRS.xml);\n      }\n    }\n\n    /* Merge configuration parameters */\n    if (cfg.ADD_TAGS) {\n      if (ALLOWED_TAGS === DEFAULT_ALLOWED_TAGS) {\n        ALLOWED_TAGS = clone(ALLOWED_TAGS);\n      }\n\n      addToSet(ALLOWED_TAGS, cfg.ADD_TAGS, transformCaseFunc);\n    }\n\n    if (cfg.ADD_ATTR) {\n      if (ALLOWED_ATTR === DEFAULT_ALLOWED_ATTR) {\n        ALLOWED_ATTR = clone(ALLOWED_ATTR);\n      }\n\n      addToSet(ALLOWED_ATTR, cfg.ADD_ATTR, transformCaseFunc);\n    }\n\n    if (cfg.ADD_URI_SAFE_ATTR) {\n      addToSet(URI_SAFE_ATTRIBUTES, cfg.ADD_URI_SAFE_ATTR, transformCaseFunc);\n    }\n\n    if (cfg.FORBID_CONTENTS) {\n      if (FORBID_CONTENTS === DEFAULT_FORBID_CONTENTS) {\n        FORBID_CONTENTS = clone(FORBID_CONTENTS);\n      }\n\n      addToSet(FORBID_CONTENTS, cfg.FORBID_CONTENTS, transformCaseFunc);\n    }\n\n    /* Add #text in case KEEP_CONTENT is set to true */\n    if (KEEP_CONTENT) {\n      ALLOWED_TAGS['#text'] = true;\n    }\n\n    /* Add html, head and body to ALLOWED_TAGS in case WHOLE_DOCUMENT is true */\n    if (WHOLE_DOCUMENT) {\n      addToSet(ALLOWED_TAGS, ['html', 'head', 'body']);\n    }\n\n    /* Add tbody to ALLOWED_TAGS in case tables are permitted, see #286, #365 */\n    if (ALLOWED_TAGS.table) {\n      addToSet(ALLOWED_TAGS, ['tbody']);\n      delete FORBID_TAGS.tbody;\n    }\n\n    // Prevent further manipulation of configuration.\n    // Not available in IE8, Safari 5, etc.\n    if (freeze) {\n      freeze(cfg);\n    }\n\n    CONFIG = cfg;\n  };\n\n  const MATHML_TEXT_INTEGRATION_POINTS = addToSet({}, [\n    'mi',\n    'mo',\n    'mn',\n    'ms',\n    'mtext',\n  ]);\n\n  const HTML_INTEGRATION_POINTS = addToSet({}, [\n    'foreignobject',\n    'desc',\n    'title',\n    'annotation-xml',\n  ]);\n\n  // Certain elements are allowed in both SVG and HTML\n  // namespace. We need to specify them explicitly\n  // so that they don't get erroneously deleted from\n  // HTML namespace.\n  const COMMON_SVG_AND_HTML_ELEMENTS = addToSet({}, [\n    'title',\n    'style',\n    'font',\n    'a',\n    'script',\n  ]);\n\n  /* Keep track of all possible SVG and MathML tags\n   * so that we can perform the namespace checks\n   * correctly. */\n  const ALL_SVG_TAGS = addToSet({}, TAGS.svg);\n  addToSet(ALL_SVG_TAGS, TAGS.svgFilters);\n  addToSet(ALL_SVG_TAGS, TAGS.svgDisallowed);\n\n  const ALL_MATHML_TAGS = addToSet({}, TAGS.mathMl);\n  addToSet(ALL_MATHML_TAGS, TAGS.mathMlDisallowed);\n\n  /**\n   *\n   *\n   * @param  {Element} element a DOM element whose namespace is being checked\n   * @returns {boolean} Return false if the element has a\n   *  namespace that a spec-compliant parser would never\n   *  return. Return true otherwise.\n   */\n  const _checkValidNamespace = function (element) {\n    let parent = getParentNode(element);\n\n    // In JSDOM, if we're inside shadow DOM, then parentNode\n    // can be null. We just simulate parent in this case.\n    if (!parent || !parent.tagName) {\n      parent = {\n        namespaceURI: NAMESPACE,\n        tagName: 'template',\n      };\n    }\n\n    const tagName = stringToLowerCase(element.tagName);\n    const parentTagName = stringToLowerCase(parent.tagName);\n\n    if (!ALLOWED_NAMESPACES[element.namespaceURI]) {\n      return false;\n    }\n\n    if (element.namespaceURI === SVG_NAMESPACE) {\n      // The only way to switch from HTML namespace to SVG\n      // is via <svg>. If it happens via any other tag, then\n      // it should be killed.\n      if (parent.namespaceURI === HTML_NAMESPACE) {\n        return tagName === 'svg';\n      }\n\n      // The only way to switch from MathML to SVG is via`\n      // svg if parent is either <annotation-xml> or MathML\n      // text integration points.\n      if (parent.namespaceURI === MATHML_NAMESPACE) {\n        return (\n          tagName === 'svg' &&\n          (parentTagName === 'annotation-xml' ||\n            MATHML_TEXT_INTEGRATION_POINTS[parentTagName])\n        );\n      }\n\n      // We only allow elements that are defined in SVG\n      // spec. All others are disallowed in SVG namespace.\n      return Boolean(ALL_SVG_TAGS[tagName]);\n    }\n\n    if (element.namespaceURI === MATHML_NAMESPACE) {\n      // The only way to switch from HTML namespace to MathML\n      // is via <math>. If it happens via any other tag, then\n      // it should be killed.\n      if (parent.namespaceURI === HTML_NAMESPACE) {\n        return tagName === 'math';\n      }\n\n      // The only way to switch from SVG to MathML is via\n      // <math> and HTML integration points\n      if (parent.namespaceURI === SVG_NAMESPACE) {\n        return tagName === 'math' && HTML_INTEGRATION_POINTS[parentTagName];\n      }\n\n      // We only allow elements that are defined in MathML\n      // spec. All others are disallowed in MathML namespace.\n      return Boolean(ALL_MATHML_TAGS[tagName]);\n    }\n\n    if (element.namespaceURI === HTML_NAMESPACE) {\n      // The only way to switch from SVG to HTML is via\n      // HTML integration points, and from MathML to HTML\n      // is via MathML text integration points\n      if (\n        parent.namespaceURI === SVG_NAMESPACE &&\n        !HTML_INTEGRATION_POINTS[parentTagName]\n      ) {\n        return false;\n      }\n\n      if (\n        parent.namespaceURI === MATHML_NAMESPACE &&\n        !MATHML_TEXT_INTEGRATION_POINTS[parentTagName]\n      ) {\n        return false;\n      }\n\n      // We disallow tags that are specific for MathML\n      // or SVG and should never appear in HTML namespace\n      return (\n        !ALL_MATHML_TAGS[tagName] &&\n        (COMMON_SVG_AND_HTML_ELEMENTS[tagName] || !ALL_SVG_TAGS[tagName])\n      );\n    }\n\n    // For XHTML and XML documents that support custom namespaces\n    if (\n      PARSER_MEDIA_TYPE === 'application/xhtml+xml' &&\n      ALLOWED_NAMESPACES[element.namespaceURI]\n    ) {\n      return true;\n    }\n\n    // The code should never reach this place (this means\n    // that the element somehow got namespace that is not\n    // HTML, SVG, MathML or allowed via ALLOWED_NAMESPACES).\n    // Return false just in case.\n    return false;\n  };\n\n  /**\n   * _forceRemove\n   *\n   * @param  {Node} node a DOM node\n   */\n  const _forceRemove = function (node) {\n    arrayPush(DOMPurify.removed, { element: node });\n    try {\n      // eslint-disable-next-line unicorn/prefer-dom-node-remove\n      node.parentNode.removeChild(node);\n    } catch (_) {\n      node.remove();\n    }\n  };\n\n  /**\n   * _removeAttribute\n   *\n   * @param  {String} name an Attribute name\n   * @param  {Node} node a DOM node\n   */\n  const _removeAttribute = function (name, node) {\n    try {\n      arrayPush(DOMPurify.removed, {\n        attribute: node.getAttributeNode(name),\n        from: node,\n      });\n    } catch (_) {\n      arrayPush(DOMPurify.removed, {\n        attribute: null,\n        from: node,\n      });\n    }\n\n    node.removeAttribute(name);\n\n    // We void attribute values for unremovable \"is\"\" attributes\n    if (name === 'is' && !ALLOWED_ATTR[name]) {\n      if (RETURN_DOM || RETURN_DOM_FRAGMENT) {\n        try {\n          _forceRemove(node);\n        } catch (_) {}\n      } else {\n        try {\n          node.setAttribute(name, '');\n        } catch (_) {}\n      }\n    }\n  };\n\n  /**\n   * _initDocument\n   *\n   * @param  {String} dirty a string of dirty markup\n   * @return {Document} a DOM, filled with the dirty markup\n   */\n  const _initDocument = function (dirty) {\n    /* Create a HTML document */\n    let doc;\n    let leadingWhitespace;\n\n    if (FORCE_BODY) {\n      dirty = '<remove></remove>' + dirty;\n    } else {\n      /* If FORCE_BODY isn't used, leading whitespace needs to be preserved manually */\n      const matches = stringMatch(dirty, /^[\\r\\n\\t ]+/);\n      leadingWhitespace = matches && matches[0];\n    }\n\n    if (\n      PARSER_MEDIA_TYPE === 'application/xhtml+xml' &&\n      NAMESPACE === HTML_NAMESPACE\n    ) {\n      // Root of XHTML doc must contain xmlns declaration (see https://www.w3.org/TR/xhtml1/normative.html#strict)\n      dirty =\n        '<html xmlns=\"http://www.w3.org/1999/xhtml\"><head></head><body>' +\n        dirty +\n        '</body></html>';\n    }\n\n    const dirtyPayload = trustedTypesPolicy\n      ? trustedTypesPolicy.createHTML(dirty)\n      : dirty;\n    /*\n     * Use the DOMParser API by default, fallback later if needs be\n     * DOMParser not work for svg when has multiple root element.\n     */\n    if (NAMESPACE === HTML_NAMESPACE) {\n      try {\n        doc = new DOMParser().parseFromString(dirtyPayload, PARSER_MEDIA_TYPE);\n      } catch (_) {}\n    }\n\n    /* Use createHTMLDocument in case DOMParser is not available */\n    if (!doc || !doc.documentElement) {\n      doc = implementation.createDocument(NAMESPACE, 'template', null);\n      try {\n        doc.documentElement.innerHTML = IS_EMPTY_INPUT\n          ? emptyHTML\n          : dirtyPayload;\n      } catch (_) {\n        // Syntax error if dirtyPayload is invalid xml\n      }\n    }\n\n    const body = doc.body || doc.documentElement;\n\n    if (dirty && leadingWhitespace) {\n      body.insertBefore(\n        document.createTextNode(leadingWhitespace),\n        body.childNodes[0] || null\n      );\n    }\n\n    /* Work on whole document or just its body */\n    if (NAMESPACE === HTML_NAMESPACE) {\n      return getElementsByTagName.call(\n        doc,\n        WHOLE_DOCUMENT ? 'html' : 'body'\n      )[0];\n    }\n\n    return WHOLE_DOCUMENT ? doc.documentElement : body;\n  };\n\n  /**\n   * _createIterator\n   *\n   * @param  {Document} root document/fragment to create iterator for\n   * @return {Iterator} iterator instance\n   */\n  const _createIterator = function (root) {\n    return createNodeIterator.call(\n      root.ownerDocument || root,\n      root,\n      // eslint-disable-next-line no-bitwise\n      NodeFilter.SHOW_ELEMENT | NodeFilter.SHOW_COMMENT | NodeFilter.SHOW_TEXT,\n      null,\n      false\n    );\n  };\n\n  /**\n   * _isClobbered\n   *\n   * @param  {Node} elm element to check for clobbering attacks\n   * @return {Boolean} true if clobbered, false if safe\n   */\n  const _isClobbered = function (elm) {\n    return (\n      elm instanceof HTMLFormElement &&\n      (typeof elm.nodeName !== 'string' ||\n        typeof elm.textContent !== 'string' ||\n        typeof elm.removeChild !== 'function' ||\n        !(elm.attributes instanceof NamedNodeMap) ||\n        typeof elm.removeAttribute !== 'function' ||\n        typeof elm.setAttribute !== 'function' ||\n        typeof elm.namespaceURI !== 'string' ||\n        typeof elm.insertBefore !== 'function' ||\n        typeof elm.hasChildNodes !== 'function')\n    );\n  };\n\n  /**\n   * _isNode\n   *\n   * @param  {Node} obj object to check whether it's a DOM node\n   * @return {Boolean} true is object is a DOM node\n   */\n  const _isNode = function (object) {\n    return typeof Node === 'object'\n      ? object instanceof Node\n      : object &&\n          typeof object === 'object' &&\n          typeof object.nodeType === 'number' &&\n          typeof object.nodeName === 'string';\n  };\n\n  /**\n   * _executeHook\n   * Execute user configurable hooks\n   *\n   * @param  {String} entryPoint  Name of the hook's entry point\n   * @param  {Node} currentNode node to work on with the hook\n   * @param  {Object} data additional hook parameters\n   */\n  const _executeHook = function (entryPoint, currentNode, data) {\n    if (!hooks[entryPoint]) {\n      return;\n    }\n\n    arrayForEach(hooks[entryPoint], (hook) => {\n      hook.call(DOMPurify, currentNode, data, CONFIG);\n    });\n  };\n\n  /**\n   * _sanitizeElements\n   *\n   * @protect nodeName\n   * @protect textContent\n   * @protect removeChild\n   *\n   * @param   {Node} currentNode to check for permission to exist\n   * @return  {Boolean} true if node was killed, false if left alive\n   */\n  const _sanitizeElements = function (currentNode) {\n    let content;\n\n    /* Execute a hook if present */\n    _executeHook('beforeSanitizeElements', currentNode, null);\n\n    /* Check if element is clobbered or can clobber */\n    if (_isClobbered(currentNode)) {\n      _forceRemove(currentNode);\n      return true;\n    }\n\n    /* Now let's check the element's type and name */\n    const tagName = transformCaseFunc(currentNode.nodeName);\n\n    /* Execute a hook if present */\n    _executeHook('uponSanitizeElement', currentNode, {\n      tagName,\n      allowedTags: ALLOWED_TAGS,\n    });\n\n    /* Detect mXSS attempts abusing namespace confusion */\n    if (\n      currentNode.hasChildNodes() &&\n      !_isNode(currentNode.firstElementChild) &&\n      (!_isNode(currentNode.content) ||\n        !_isNode(currentNode.content.firstElementChild)) &&\n      regExpTest(/<[/\\w]/g, currentNode.innerHTML) &&\n      regExpTest(/<[/\\w]/g, currentNode.textContent)\n    ) {\n      _forceRemove(currentNode);\n      return true;\n    }\n\n    /* Remove element if anything forbids its presence */\n    if (!ALLOWED_TAGS[tagName] || FORBID_TAGS[tagName]) {\n      /* Check if we have a custom element to handle */\n      if (!FORBID_TAGS[tagName] && _basicCustomElementTest(tagName)) {\n        if (\n          CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof RegExp &&\n          regExpTest(CUSTOM_ELEMENT_HANDLING.tagNameCheck, tagName)\n        )\n          return false;\n        if (\n          CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof Function &&\n          CUSTOM_ELEMENT_HANDLING.tagNameCheck(tagName)\n        )\n          return false;\n      }\n\n      /* Keep content except for bad-listed elements */\n      if (KEEP_CONTENT && !FORBID_CONTENTS[tagName]) {\n        const parentNode = getParentNode(currentNode) || currentNode.parentNode;\n        const childNodes = getChildNodes(currentNode) || currentNode.childNodes;\n\n        if (childNodes && parentNode) {\n          const childCount = childNodes.length;\n\n          for (let i = childCount - 1; i >= 0; --i) {\n            parentNode.insertBefore(\n              cloneNode(childNodes[i], true),\n              getNextSibling(currentNode)\n            );\n          }\n        }\n      }\n\n      _forceRemove(currentNode);\n      return true;\n    }\n\n    /* Check whether element has a valid namespace */\n    if (currentNode instanceof Element && !_checkValidNamespace(currentNode)) {\n      _forceRemove(currentNode);\n      return true;\n    }\n\n    /* Make sure that older browsers don't get noscript mXSS */\n    if (\n      (tagName === 'noscript' || tagName === 'noembed') &&\n      regExpTest(/<\\/no(script|embed)/i, currentNode.innerHTML)\n    ) {\n      _forceRemove(currentNode);\n      return true;\n    }\n\n    /* Sanitize element content to be template-safe */\n    if (SAFE_FOR_TEMPLATES && currentNode.nodeType === 3) {\n      /* Get the element's text content */\n      content = currentNode.textContent;\n      content = stringReplace(content, MUSTACHE_EXPR, ' ');\n      content = stringReplace(content, ERB_EXPR, ' ');\n      content = stringReplace(content, TMPLIT_EXPR, ' ');\n      if (currentNode.textContent !== content) {\n        arrayPush(DOMPurify.removed, { element: currentNode.cloneNode() });\n        currentNode.textContent = content;\n      }\n    }\n\n    /* Execute a hook if present */\n    _executeHook('afterSanitizeElements', currentNode, null);\n\n    return false;\n  };\n\n  /**\n   * _isValidAttribute\n   *\n   * @param  {string} lcTag Lowercase tag name of containing element.\n   * @param  {string} lcName Lowercase attribute name.\n   * @param  {string} value Attribute value.\n   * @return {Boolean} Returns true if `value` is valid, otherwise false.\n   */\n  // eslint-disable-next-line complexity\n  const _isValidAttribute = function (lcTag, lcName, value) {\n    /* Make sure attribute cannot clobber */\n    if (\n      SANITIZE_DOM &&\n      (lcName === 'id' || lcName === 'name') &&\n      (value in document || value in formElement)\n    ) {\n      return false;\n    }\n\n    /* Allow valid data-* attributes: At least one character after \"-\"\n        (https://html.spec.whatwg.org/multipage/dom.html#embedding-custom-non-visible-data-with-the-data-*-attributes)\n        XML-compatible (https://html.spec.whatwg.org/multipage/infrastructure.html#xml-compatible and http://www.w3.org/TR/xml/#d0e804)\n        We don't need to check the value; it's always URI safe. */\n    if (\n      ALLOW_DATA_ATTR &&\n      !FORBID_ATTR[lcName] &&\n      regExpTest(DATA_ATTR, lcName)\n    ) {\n      // This attribute is safe\n    } else if (ALLOW_ARIA_ATTR && regExpTest(ARIA_ATTR, lcName)) {\n      // This attribute is safe\n      /* Otherwise, check the name is permitted */\n    } else if (!ALLOWED_ATTR[lcName] || FORBID_ATTR[lcName]) {\n      if (\n        // First condition does a very basic check if a) it's basically a valid custom element tagname AND\n        // b) if the tagName passes whatever the user has configured for CUSTOM_ELEMENT_HANDLING.tagNameCheck\n        // and c) if the attribute name passes whatever the user has configured for CUSTOM_ELEMENT_HANDLING.attributeNameCheck\n        (_basicCustomElementTest(lcTag) &&\n          ((CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof RegExp &&\n            regExpTest(CUSTOM_ELEMENT_HANDLING.tagNameCheck, lcTag)) ||\n            (CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof Function &&\n              CUSTOM_ELEMENT_HANDLING.tagNameCheck(lcTag))) &&\n          ((CUSTOM_ELEMENT_HANDLING.attributeNameCheck instanceof RegExp &&\n            regExpTest(CUSTOM_ELEMENT_HANDLING.attributeNameCheck, lcName)) ||\n            (CUSTOM_ELEMENT_HANDLING.attributeNameCheck instanceof Function &&\n              CUSTOM_ELEMENT_HANDLING.attributeNameCheck(lcName)))) ||\n        // Alternative, second condition checks if it's an `is`-attribute, AND\n        // the value passes whatever the user has configured for CUSTOM_ELEMENT_HANDLING.tagNameCheck\n        (lcName === 'is' &&\n          CUSTOM_ELEMENT_HANDLING.allowCustomizedBuiltInElements &&\n          ((CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof RegExp &&\n            regExpTest(CUSTOM_ELEMENT_HANDLING.tagNameCheck, value)) ||\n            (CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof Function &&\n              CUSTOM_ELEMENT_HANDLING.tagNameCheck(value))))\n      ) {\n        // If user has supplied a regexp or function in CUSTOM_ELEMENT_HANDLING.tagNameCheck, we need to also allow derived custom elements using the same tagName test.\n        // Additionally, we need to allow attributes passing the CUSTOM_ELEMENT_HANDLING.attributeNameCheck user has configured, as custom elements can define these at their own discretion.\n      } else {\n        return false;\n      }\n      /* Check value is safe. First, is attr inert? If so, is safe */\n    } else if (URI_SAFE_ATTRIBUTES[lcName]) {\n      // This attribute is safe\n      /* Check no script, data or unknown possibly unsafe URI\n        unless we know URI values are safe for that attribute */\n    } else if (\n      regExpTest(IS_ALLOWED_URI, stringReplace(value, ATTR_WHITESPACE, ''))\n    ) {\n      // This attribute is safe\n      /* Keep image data URIs alive if src/xlink:href is allowed */\n      /* Further prevent gadget XSS for dynamically built script tags */\n    } else if (\n      (lcName === 'src' || lcName === 'xlink:href' || lcName === 'href') &&\n      lcTag !== 'script' &&\n      stringIndexOf(value, 'data:') === 0 &&\n      DATA_URI_TAGS[lcTag]\n    ) {\n      // This attribute is safe\n      /* Allow unknown protocols: This provides support for links that\n        are handled by protocol handlers which may be unknown ahead of\n        time, e.g. fb:, spotify: */\n    } else if (\n      ALLOW_UNKNOWN_PROTOCOLS &&\n      !regExpTest(IS_SCRIPT_OR_DATA, stringReplace(value, ATTR_WHITESPACE, ''))\n    ) {\n      // This attribute is safe\n      /* Check for binary attributes */\n      // eslint-disable-next-line no-negated-condition\n    } else if (!value) {\n      // Binary attributes are safe at this point\n      /* Anything else, presume unsafe, do not add it back */\n    } else {\n      return false;\n    }\n\n    return true;\n  };\n\n  /**\n   * _basicCustomElementCheck\n   * checks if at least one dash is included in tagName, and it's not the first char\n   * for more sophisticated checking see https://github.com/sindresorhus/validate-element-name\n   * @param {string} tagName name of the tag of the node to sanitize\n   */\n  const _basicCustomElementTest = function (tagName) {\n    return tagName.indexOf('-') > 0;\n  };\n\n  /**\n   * _sanitizeAttributes\n   *\n   * @protect attributes\n   * @protect nodeName\n   * @protect removeAttribute\n   * @protect setAttribute\n   *\n   * @param  {Node} currentNode to sanitize\n   */\n  const _sanitizeAttributes = function (currentNode) {\n    let attr;\n    let value;\n    let lcName;\n    let l;\n    /* Execute a hook if present */\n    _executeHook('beforeSanitizeAttributes', currentNode, null);\n\n    const { attributes } = currentNode;\n\n    /* Check if we have attributes; if not we might have a text node */\n    if (!attributes) {\n      return;\n    }\n\n    const hookEvent = {\n      attrName: '',\n      attrValue: '',\n      keepAttr: true,\n      allowedAttributes: ALLOWED_ATTR,\n    };\n    l = attributes.length;\n\n    /* Go backwards over all attributes; safely remove bad ones */\n    while (l--) {\n      attr = attributes[l];\n      const { name, namespaceURI } = attr;\n      value = name === 'value' ? attr.value : stringTrim(attr.value);\n      lcName = transformCaseFunc(name);\n\n      /* Execute a hook if present */\n      hookEvent.attrName = lcName;\n      hookEvent.attrValue = value;\n      hookEvent.keepAttr = true;\n      hookEvent.forceKeepAttr = undefined; // Allows developers to see this is a property they can set\n      _executeHook('uponSanitizeAttribute', currentNode, hookEvent);\n      value = hookEvent.attrValue;\n      /* Did the hooks approve of the attribute? */\n      if (hookEvent.forceKeepAttr) {\n        continue;\n      }\n\n      /* Remove attribute */\n      _removeAttribute(name, currentNode);\n\n      /* Did the hooks approve of the attribute? */\n      if (!hookEvent.keepAttr) {\n        continue;\n      }\n\n      /* Work around a security issue in jQuery 3.0 */\n      if (!ALLOW_SELF_CLOSE_IN_ATTR && regExpTest(/\\/>/i, value)) {\n        _removeAttribute(name, currentNode);\n        continue;\n      }\n\n      /* Sanitize attribute content to be template-safe */\n      if (SAFE_FOR_TEMPLATES) {\n        value = stringReplace(value, MUSTACHE_EXPR, ' ');\n        value = stringReplace(value, ERB_EXPR, ' ');\n        value = stringReplace(value, TMPLIT_EXPR, ' ');\n      }\n\n      /* Is `value` valid for this attribute? */\n      const lcTag = transformCaseFunc(currentNode.nodeName);\n      if (!_isValidAttribute(lcTag, lcName, value)) {\n        continue;\n      }\n\n      /* Full DOM Clobbering protection via namespace isolation,\n       * Prefix id and name attributes with `user-content-`\n       */\n      if (SANITIZE_NAMED_PROPS && (lcName === 'id' || lcName === 'name')) {\n        // Remove the attribute with this value\n        _removeAttribute(name, currentNode);\n\n        // Prefix the value and later re-create the attribute with the sanitized value\n        value = SANITIZE_NAMED_PROPS_PREFIX + value;\n      }\n\n      /* Handle attributes that require Trusted Types */\n      if (\n        trustedTypesPolicy &&\n        typeof trustedTypes === 'object' &&\n        typeof trustedTypes.getAttributeType === 'function'\n      ) {\n        if (namespaceURI) {\n          /* Namespaces are not yet supported, see https://bugs.chromium.org/p/chromium/issues/detail?id=1305293 */\n        } else {\n          switch (trustedTypes.getAttributeType(lcTag, lcName)) {\n            case 'TrustedHTML':\n              value = trustedTypesPolicy.createHTML(value);\n              break;\n            case 'TrustedScriptURL':\n              value = trustedTypesPolicy.createScriptURL(value);\n              break;\n            default:\n              break;\n          }\n        }\n      }\n\n      /* Handle invalid data-* attribute set by try-catching it */\n      try {\n        if (namespaceURI) {\n          currentNode.setAttributeNS(namespaceURI, name, value);\n        } else {\n          /* Fallback to setAttribute() for browser-unrecognized namespaces e.g. \"x-schema\". */\n          currentNode.setAttribute(name, value);\n        }\n\n        arrayPop(DOMPurify.removed);\n      } catch (_) {}\n    }\n\n    /* Execute a hook if present */\n    _executeHook('afterSanitizeAttributes', currentNode, null);\n  };\n\n  /**\n   * _sanitizeShadowDOM\n   *\n   * @param  {DocumentFragment} fragment to iterate over recursively\n   */\n  const _sanitizeShadowDOM = function (fragment) {\n    let shadowNode;\n    const shadowIterator = _createIterator(fragment);\n\n    /* Execute a hook if present */\n    _executeHook('beforeSanitizeShadowDOM', fragment, null);\n\n    while ((shadowNode = shadowIterator.nextNode())) {\n      /* Execute a hook if present */\n      _executeHook('uponSanitizeShadowNode', shadowNode, null);\n\n      /* Sanitize tags and elements */\n      if (_sanitizeElements(shadowNode)) {\n        continue;\n      }\n\n      /* Deep shadow DOM detected */\n      if (shadowNode.content instanceof DocumentFragment) {\n        _sanitizeShadowDOM(shadowNode.content);\n      }\n\n      /* Check attributes, sanitize if necessary */\n      _sanitizeAttributes(shadowNode);\n    }\n\n    /* Execute a hook if present */\n    _executeHook('afterSanitizeShadowDOM', fragment, null);\n  };\n\n  /**\n   * Sanitize\n   * Public method providing core sanitation functionality\n   *\n   * @param {String|Node} dirty string or DOM node\n   * @param {Object} configuration object\n   */\n  // eslint-disable-next-line complexity\n  DOMPurify.sanitize = function (dirty, cfg = {}) {\n    let body;\n    let importedNode;\n    let currentNode;\n    let returnNode;\n    /* Make sure we have a string to sanitize.\n      DO NOT return early, as this will return the wrong type if\n      the user has requested a DOM object rather than a string */\n    IS_EMPTY_INPUT = !dirty;\n    if (IS_EMPTY_INPUT) {\n      dirty = '<!-->';\n    }\n\n    /* Stringify, in case dirty is an object */\n    if (typeof dirty !== 'string' && !_isNode(dirty)) {\n      // eslint-disable-next-line no-negated-condition\n      if (typeof dirty.toString !== 'function') {\n        throw typeErrorCreate('toString is not a function');\n      } else {\n        dirty = dirty.toString();\n        if (typeof dirty !== 'string') {\n          throw typeErrorCreate('dirty is not a string, aborting');\n        }\n      }\n    }\n\n    /* Return dirty HTML if DOMPurify cannot run */\n    if (!DOMPurify.isSupported) {\n      return dirty;\n    }\n\n    /* Assign config vars */\n    if (!SET_CONFIG) {\n      _parseConfig(cfg);\n    }\n\n    /* Clean up removed elements */\n    DOMPurify.removed = [];\n\n    /* Check if dirty is correctly typed for IN_PLACE */\n    if (typeof dirty === 'string') {\n      IN_PLACE = false;\n    }\n\n    if (IN_PLACE) {\n      /* Do some early pre-sanitization to avoid unsafe root nodes */\n      if (dirty.nodeName) {\n        const tagName = transformCaseFunc(dirty.nodeName);\n        if (!ALLOWED_TAGS[tagName] || FORBID_TAGS[tagName]) {\n          throw typeErrorCreate(\n            'root node is forbidden and cannot be sanitized in-place'\n          );\n        }\n      }\n    } else if (dirty instanceof Node) {\n      /* If dirty is a DOM element, append to an empty document to avoid\n         elements being stripped by the parser */\n      body = _initDocument('<!---->');\n      importedNode = body.ownerDocument.importNode(dirty, true);\n      if (importedNode.nodeType === 1 && importedNode.nodeName === 'BODY') {\n        /* Node is already a body, use as is */\n        body = importedNode;\n      } else if (importedNode.nodeName === 'HTML') {\n        body = importedNode;\n      } else {\n        // eslint-disable-next-line unicorn/prefer-dom-node-append\n        body.appendChild(importedNode);\n      }\n    } else {\n      /* Exit directly if we have nothing to do */\n      if (\n        !RETURN_DOM &&\n        !SAFE_FOR_TEMPLATES &&\n        !WHOLE_DOCUMENT &&\n        // eslint-disable-next-line unicorn/prefer-includes\n        dirty.indexOf('<') === -1\n      ) {\n        return trustedTypesPolicy && RETURN_TRUSTED_TYPE\n          ? trustedTypesPolicy.createHTML(dirty)\n          : dirty;\n      }\n\n      /* Initialize the document to work on */\n      body = _initDocument(dirty);\n\n      /* Check we have a DOM node from the data */\n      if (!body) {\n        return RETURN_DOM ? null : RETURN_TRUSTED_TYPE ? emptyHTML : '';\n      }\n    }\n\n    /* Remove first element node (ours) if FORCE_BODY is set */\n    if (body && FORCE_BODY) {\n      _forceRemove(body.firstChild);\n    }\n\n    /* Get node iterator */\n    const nodeIterator = _createIterator(IN_PLACE ? dirty : body);\n\n    /* Now start iterating over the created document */\n    while ((currentNode = nodeIterator.nextNode())) {\n      /* Sanitize tags and elements */\n      if (_sanitizeElements(currentNode)) {\n        continue;\n      }\n\n      /* Shadow DOM detected, sanitize it */\n      if (currentNode.content instanceof DocumentFragment) {\n        _sanitizeShadowDOM(currentNode.content);\n      }\n\n      /* Check attributes, sanitize if necessary */\n      _sanitizeAttributes(currentNode);\n    }\n\n    /* If we sanitized `dirty` in-place, return it. */\n    if (IN_PLACE) {\n      return dirty;\n    }\n\n    /* Return sanitized string or DOM */\n    if (RETURN_DOM) {\n      if (RETURN_DOM_FRAGMENT) {\n        returnNode = createDocumentFragment.call(body.ownerDocument);\n\n        while (body.firstChild) {\n          // eslint-disable-next-line unicorn/prefer-dom-node-append\n          returnNode.appendChild(body.firstChild);\n        }\n      } else {\n        returnNode = body;\n      }\n\n      if (ALLOWED_ATTR.shadowroot || ALLOWED_ATTR.shadowrootmod) {\n        /*\n          AdoptNode() is not used because internal state is not reset\n          (e.g. the past names map of a HTMLFormElement), this is safe\n          in theory but we would rather not risk another attack vector.\n          The state that is cloned by importNode() is explicitly defined\n          by the specs.\n        */\n        returnNode = importNode.call(originalDocument, returnNode, true);\n      }\n\n      return returnNode;\n    }\n\n    let serializedHTML = 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programming_language: JavaScript