Repository: PrismJS/prism (ts)

Issue:
[language-markup] Quotes in HTML attribute values are highlighted
**Information:**
- Prism version: Latest (reproducible on test.html)
- Plugins: none
- Environment: Browser

Quotes are highlighted as punctuation inside HTML attributes. E.g. this:

```html
<google-chart data='[["Month", "Days"], ["Jan", 31]]'></google-chart>
```

is highlighted as:

<img width="612" alt="image" src="https://user-images.githubusercontent.com/175836/165538134-ce6efc24-04c1-48c4-b4c9-374dec718e8a.png">

We might decide that this is a feature, not a bug, but figured I'd flag this in case, as it looked wrong to me.


Pull request description:
Markup: Fixed quotes in HTML attribute values
Fixes #3441.

Patch:
diff --git a/components/prism-markup.js b/components/prism-markup.js
index 7d4d2e2b..651c62ee 100644
--- a/components/prism-markup.js
+++ b/components/prism-markup.js
@@ -51,7 +51,10 @@ Prism.languages.markup = {
 							pattern: /^=/,
 							alias: 'attr-equals'
 						},
-						/"|'/
+						{
+							pattern: /^(\s*)["']|["']$/,
+							lookbehind: true
+						}
 					]
 				}
 			},
diff --git a/components/prism-markup.min.js b/components/prism-markup.min.js
index ee4b23ac..d39ab7fa 100644
--- a/components/prism-markup.min.js
+++ b/components/prism-markup.min.js
@@ -1,1 +1,1 @@
-Prism.languages.markup={comment:{pattern:/<!--(?:(?!<!--)[\s\S])*?-->/,greedy:!0},prolog:{pattern:/<\?[\s\S]+?\?>/,greedy:!0},doctype:{pattern:/<!DOCTYPE(?:[^>"'[\]]|"[^"]*"|'[^']*')+(?:\[(?:[^<"'\]]|"[^"]*"|'[^']*'|<(?!!--)|<!--(?:[^-]|-(?!->))*-->)*\]\s*)?>/i,greedy:!0,inside:{"internal-subset":{pattern:/(^[^\[]*\[)[\s\S]+(?=\]>$)/,lookbehind:!0,greedy:!0,inside:null},string:{pattern:/"[^"]*"|'[^']*'/,greedy:!0},punctuation:/^<!|>$|[[\]]/,"doctype-tag":/^DOCTYPE/i,name:/[^\s<>'"]+/}},cdata:{pattern:/<!\[CDATA\[[\s\S]*?\]\]>/i,greedy:!0},tag:{pattern:/<\/?(?!\d)[^\s>\/=$<%]+(?:\s(?:\s*[^\s>\/=]+(?:\s*=\s*(?:"[^"]*"|'[^']*'|[^\s'">=]+(?=[\s>]))|(?=[\s/>])))+)?\s*\/?>/,greedy:!0,inside:{tag:{pattern:/^<\/?[^\s>\/]+/,inside:{punctuation:/^<\/?/,namespace:/^[^\s>\/:]+:/}},"special-attr":[],"attr-value":{pattern:/=\s*(?:"[^"]*"|'[^']*'|[^\s'">=]+)/,inside:{punctuation:[{pattern:/^=/,alias:"attr-equals"},/"|'/]}},punctuation:/\/?>/,"attr-name":{pattern:/[^\s>\/]+/,inside:{namespace:/^[^\s>\/:]+:/}}}},entity:[{pattern:/&[\da-z]{1,8};/i,alias:"named-entity"},/&#x?[\da-f]{1,8};/i]},Prism.languages.markup.tag.inside["attr-value"].inside.entity=Prism.languages.markup.entity,Prism.languages.markup.doctype.inside["internal-subset"].inside=Prism.languages.markup,Prism.hooks.add("wrap",(function(a){"entity"===a.type&&(a.attributes.title=a.content.replace(/&amp;/,"&"))})),Object.defineProperty(Prism.languages.markup.tag,"addInlined",{value:function(a,e){var s={};s["language-"+e]={pattern:/(^<!\[CDATA\[)[\s\S]+?(?=\]\]>$)/i,lookbehind:!0,inside:Prism.languages[e]},s.cdata=/^<!\[CDATA\[|\]\]>$/i;var t={"included-cdata":{pattern:/<!\[CDATA\[[\s\S]*?\]\]>/i,inside:s}};t["language-"+e]={pattern:/[\s\S]+/,inside:Prism.languages[e]};var n={};n[a]={pattern:RegExp("(<__[^>]*>)(?:<!\\[CDATA\\[(?:[^\\]]|\\](?!\\]>))*\\]\\]>|(?!<!\\[CDATA\\[)[^])*?(?=</__>)".replace(/__/g,(function(){return a})),"i"),lookbehind:!0,greedy:!0,inside:t},Prism.languages.insertBefore("markup","cdata",n)}}),Object.defineProperty(Prism.languages.markup.tag,"addAttribute",{value:function(a,e){Prism.languages.markup.tag.inside["special-attr"].push({pattern:RegExp("(^|[\"'\\s])(?:"+a+")\\s*=\\s*(?:\"[^\"]*\"|'[^']*'|[^\\s'\">=]+(?=[\\s>]))","i"),lookbehind:!0,inside:{"attr-name":/^[^\s=]+/,"attr-value":{pattern:/=[\s\S]+/,inside:{value:{pattern:/(^=\s*(["']|(?!["'])))\S[\s\S]*(?=\2$)/,lookbehind:!0,alias:[e,"language-"+e],inside:Prism.languages[e]},punctuation:[{pattern:/^=/,alias:"attr-equals"},/"|'/]}}}})}}),Prism.languages.html=Prism.languages.markup,Prism.languages.mathml=Prism.languages.markup,Prism.languages.svg=Prism.languages.markup,Prism.languages.xml=Prism.languages.extend("markup",{}),Prism.languages.ssml=Prism.languages.xml,Prism.languages.atom=Prism.languages.xml,Prism.languages.rss=Prism.languages.xml;
\ No newline at end of file
+Prism.languages.markup={comment:{pattern:/<!--(?:(?!<!--)[\s\S])*?-->/,greedy:!0},prolog:{pattern:/<\?[\s\S]+?\?>/,greedy:!0},doctype:{pattern:/<!DOCTYPE(?:[^>"'[\]]|"[^"]*"|'[^']*')+(?:\[(?:[^<"'\]]|"[^"]*"|'[^']*'|<(?!!--)|<!--(?:[^-]|-(?!->))*-->)*\]\s*)?>/i,greedy:!0,inside:{"internal-subset":{pattern:/(^[^\[]*\[)[\s\S]+(?=\]>$)/,lookbehind:!0,greedy:!0,inside:null},string:{pattern:/"[^"]*"|'[^']*'/,greedy:!0},punctuation:/^<!|>$|[[\]]/,"doctype-tag":/^DOCTYPE/i,name:/[^\s<>'"]+/}},cdata:{pattern:/<!\[CDATA\[[\s\S]*?\]\]>/i,greedy:!0},tag:{pattern:/<\/?(?!\d)[^\s>\/=$<%]+(?:\s(?:\s*[^\s>\/=]+(?:\s*=\s*(?:"[^"]*"|'[^']*'|[^\s'">=]+(?=[\s>]))|(?=[\s/>])))+)?\s*\/?>/,greedy:!0,inside:{tag:{pattern:/^<\/?[^\s>\/]+/,inside:{punctuation:/^<\/?/,namespace:/^[^\s>\/:]+:/}},"special-attr":[],"attr-value":{pattern:/=\s*(?:"[^"]*"|'[^']*'|[^\s'">=]+)/,inside:{punctuation:[{pattern:/^=/,alias:"attr-equals"},{pattern:/^(\s*)["']|["']$/,lookbehind:!0}]}},punctuation:/\/?>/,"attr-name":{pattern:/[^\s>\/]+/,inside:{namespace:/^[^\s>\/:]+:/}}}},entity:[{pattern:/&[\da-z]{1,8};/i,alias:"named-entity"},/&#x?[\da-f]{1,8};/i]},Prism.languages.markup.tag.inside["attr-value"].inside.entity=Prism.languages.markup.entity,Prism.languages.markup.doctype.inside["internal-subset"].inside=Prism.languages.markup,Prism.hooks.add("wrap",(function(a){"entity"===a.type&&(a.attributes.title=a.content.replace(/&amp;/,"&"))})),Object.defineProperty(Prism.languages.markup.tag,"addInlined",{value:function(a,e){var s={};s["language-"+e]={pattern:/(^<!\[CDATA\[)[\s\S]+?(?=\]\]>$)/i,lookbehind:!0,inside:Prism.languages[e]},s.cdata=/^<!\[CDATA\[|\]\]>$/i;var t={"included-cdata":{pattern:/<!\[CDATA\[[\s\S]*?\]\]>/i,inside:s}};t["language-"+e]={pattern:/[\s\S]+/,inside:Prism.languages[e]};var n={};n[a]={pattern:RegExp("(<__[^>]*>)(?:<!\\[CDATA\\[(?:[^\\]]|\\](?!\\]>))*\\]\\]>|(?!<!\\[CDATA\\[)[^])*?(?=</__>)".replace(/__/g,(function(){return a})),"i"),lookbehind:!0,greedy:!0,inside:t},Prism.languages.insertBefore("markup","cdata",n)}}),Object.defineProperty(Prism.languages.markup.tag,"addAttribute",{value:function(a,e){Prism.languages.markup.tag.inside["special-attr"].push({pattern:RegExp("(^|[\"'\\s])(?:"+a+")\\s*=\\s*(?:\"[^\"]*\"|'[^']*'|[^\\s'\">=]+(?=[\\s>]))","i"),lookbehind:!0,inside:{"attr-name":/^[^\s=]+/,"attr-value":{pattern:/=[\s\S]+/,inside:{value:{pattern:/(^=\s*(["']|(?!["'])))\S[\s\S]*(?=\2$)/,lookbehind:!0,alias:[e,"language-"+e],inside:Prism.languages[e]},punctuation:[{pattern:/^=/,alias:"attr-equals"},/"|'/]}}}})}}),Prism.languages.html=Prism.languages.markup,Prism.languages.mathml=Prism.languages.markup,Prism.languages.svg=Prism.languages.markup,Prism.languages.xml=Prism.languages.extend("markup",{}),Prism.languages.ssml=Prism.languages.xml,Prism.languages.atom=Prism.languages.xml,Prism.languages.rss=Prism.languages.xml;
\ No newline at end of file
diff --git a/prism.js b/prism.js
index aa7302c9..4b9c9a0f 100644
--- a/prism.js
+++ b/prism.js
@@ -1325,7 +1325,10 @@ Prism.languages.markup = {
 							pattern: /^=/,
 							alias: 'attr-equals'
 						},
-						/"|'/
+						{
+							pattern: /^(\s*)["']|["']$/,
+							lookbehind: true
+						}
 					]
 				}
 			},


Test patch:
diff --git a/tests/languages/markup!+javascript/javascript_inclusion.test b/tests/languages/markup!+javascript/javascript_inclusion.test
index ccff9d0e..eba69b29 100644
--- a/tests/languages/markup!+javascript/javascript_inclusion.test
+++ b/tests/languages/markup!+javascript/javascript_inclusion.test
@@ -143,10 +143,7 @@ let foo = '</script>';
 		["attr-value", [
 			["punctuation", "="],
 			["punctuation", "\""],
-			"this.textContent=",
-			["punctuation", "'"],
-			"Over!",
-			["punctuation", "'"],
+			"this.textContent='Over!'",
 			["punctuation", "\""]
 		]],
 		["punctuation", ">"]
diff --git a/tests/languages/markup/issue3441.test b/tests/languages/markup/issue3441.test
new file mode 100644
index 00000000..61c101ae
--- /dev/null
+++ b/tests/languages/markup/issue3441.test
@@ -0,0 +1,27 @@
+<google-chart data='[["Month", "Days"], ["Jan", 31]]'></google-chart>
+
+----------------------------------------------------
+
+[
+	["tag", [
+		["tag", [
+			["punctuation", "<"],
+			"google-chart"
+		]],
+		["attr-name", ["data"]],
+		["attr-value", [
+			["punctuation", "="],
+			["punctuation", "'"],
+			"[[\"Month\", \"Days\"], [\"Jan\", 31]]",
+			["punctuation", "'"]
+		]],
+		["punctuation", ">"]
+	]],
+	["tag", [
+		["tag", [
+			["punctuation", "</"],
+			"google-chart"
+		]],
+		["punctuation", ">"]
+	]]
+]