Repository: prettier/prettier (JavaScript)
Task: Bug Fix

Issue:
Script in SVG is incorrectly formatted when using HTML parser
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**Prettier 2.7.1**
[Playground link](https://prettier.io/playground/#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-EZ+cW3v80C89nt+P69HXCAAOD9tVA80rzA28QLA80Pygz9b3g20UP-MCvwFFDwIQr9HA-YNQ3DeNOB1fsVhIodTFTNQMyzCc83FQspRLHcywVKtqBrCF6XrJkWTFVVjzbEQO0IntVjIpYKJABMqJTLZaLHbMlDUYgSRgABldFs1zTlzgXOdmK3AAVAQGnQdJBEINo2PlCtFTUDoLKsgRCFkGAYgYJVQRgaVm3VNsHC1SI5h4FJgudRZTG7YiQHUt5tNpOBOAQQ8B1mMRkyKbyWjKZE2WoaFFDgTJGngBizlQZhsFFDAwE6BgYDnRQIHyIZYE4OpFEUABRTBigAGXkN4EDgAQAAoAHIABEAHkBTKWAhogbq4EUKaABpcAmgBKXByDcXBgEY-NIDIGBcCeEqDr5Nq8g6mBOGwVleqCR6rBiABJRRpoSrSdKm3a5lO7x5HSHbrrgfaTv08Ugku6RbqhzhuSKWA+ggErUfJYpMextG8axuAQbh-NwZ2qbuTyFkAEEixaeRoHQKbcGhfEcBh0H828BHcHrAaBFu9IJhZUn1x5mA+YqNbFGF0WSe58UUe6vqBtgYbRphSaprS-rii2nb9sO46lclmWSrl8hcA6KZxcliWKYmgBCAXxq5smJe8aQcZpuB6ZYpmyD2+2vfzABfM3vHD4Go5gH3Vf1jWRvgbXpsICA-eKcbDb2g6jthsPxTdoXrdtxXPcln3kWpumGZgIP0BDuOY9Dh345wLqeqTmBNdT8b08zlkgjqAbc+Ngu4+8Ev5eIMWp4biGJot9aPaLqvO9r-368b5vK-FSP95gVuzcPiWz4j2OxSqqQGvkJrTmq6RThATaQAgJrG+QUByVBNgAAVcZkGQCACYbBKToFfiALo5kwBfC0oqYaMJkAiznnAN+MC6hwNZJpbkfgoDYGQOXN+cBCAhh6utQaDRsB5DqC9AAYtZdo0JCEoDqL0CAUC6AkAAOo0HkPAdAeC4CaQQOgAR8hzCeRAWAdAkC37QhZAIGA-9zLYGaCghWb8ABW6B8CaRYUEAAinkCA8BNFoLfmjJRIDuHECgQwTosAeFKBUMgYCYgrGghZDw8yDAQGOOmONAaUCACOpj4CqI-pAth6BwQwnWutKBRRwn+DgKouhGikCoJZG-FkhB5BEIEFMPJhi4AmLMXACxuSQB+S6C47EyARBv2clkFhZRCBZJANMc0UC-YmTqF0GJOT0EgEwFML6KJiiaTvk1emihtIxCCNUuA4dw5AA)

```sh
# Options (if any):
--parser html
```

**Input:**

```html
<svg xmlns="http://www.w3.org/2000/svg" width="240" height="240" viewBox="0 0 24 24">
	<script>
		document.addEventListener('DOMContentLoaded', () => {
			const node = document.getElementById('lastStroke');
			if (node) {
				let svg = node.parentNode.parentNode.parentNode;
				if ('pauseAnimations' in svg) {
					let hover = false;
					let loaded = false;
					node.addEventListener('endEvent', () => {
						loaded = true;
						if (!hover) {
							svg.pauseAnimations();
						}
					});
					svg.addEventListener('mouseenter', () => {
						hover = true;
						svg.unpauseAnimations();
					});
					svg.addEventListener('mouseleave', () => {
						hover = false;
						if (loaded) {
							svg.pauseAnimations();
						}
					});
				}
			}
		});	
	</script>
</svg>
```

**Output:**

```svg
<svg
  xmlns="http://www.w3.org/2000/svg"
  width="240"
  height="240"
  viewBox="0 0 24 24"
>
  <script>
    document.addEventListener('DOMContentLoaded', () => { const node =
    document.getElementById('lastStroke'); if (node) { let svg =
    node.parentNode.parentNode.parentNode; if ('pauseAnimations' in svg) { let
    hover = false; let loaded = false; node.addEventListener('endEvent', () => {
    loaded = true; if (!hover) { svg.pauseAnimations(); } });
    svg.addEventListener('mouseenter', () => { hover = true;
    svg.unpauseAnimations(); }); svg.addEventListener('mouseleave', () => {
    hover = false; if (loaded) { svg.pauseAnimations(); } }); } } });
  </script>
</svg>
```

**Expected behavior:**

Expected output to be readable.

There is no special parser for SVG, so using HTML parser to format it. However, something weird happens when there is a script inside SVG and Prettier turns it into unreadable mess.


Discussion:

Patch:
diff --git a/changelog_unreleased/html/14400.md b/changelog_unreleased/html/14400.md
new file mode 100644
index 000000000000..7d9accfd49ed
--- /dev/null
+++ b/changelog_unreleased/html/14400.md
@@ -0,0 +1,38 @@
+#### Format `<script>` inside SVG (#14400 by @fisker)
+
+<!-- prettier-ignore -->
+```html
+<!-- Input -->
+<svg viewBox="0 0 200 200" xmlns="http://www.w3.org/2000/svg">
+<script>
+document.addEventListener(
+'DOMContentLoaded', () => {
+  const element = document.getElementById('foo')
+   if (element) {
+element.fillStyle = 'currentColor'
+}
+});
+</script>
+</svg>
+
+<!-- Prettier stable -->
+<svg viewBox="0 0 200 200" xmlns="http://www.w3.org/2000/svg">
+  <script>
+    document.addEventListener( 'DOMContentLoaded', () => { const element =
+    document.getElementById('foo') if (element) { element.fillStyle =
+    'currentColor' } });
+  </script>
+</svg>
+
+<!-- Prettier main -->
+<svg viewBox="0 0 200 200" xmlns="http://www.w3.org/2000/svg">
+  <script>
+    document.addEventListener("DOMContentLoaded", () => {
+      const element = document.getElementById("foo");
+      if (element) {
+        element.fillStyle = "currentColor";
+      }
+    });
+  </script>
+</svg>
+```
diff --git a/src/language-html/utils/index.js b/src/language-html/utils/index.js
index 3d57ceb8aadf..e292de525b3d 100644
--- a/src/language-html/utils/index.js
+++ b/src/language-html/utils/index.js
@@ -109,6 +109,7 @@ function isScriptLikeTag(node) {
     (node.fullName === "script" ||
       node.fullName === "style" ||
       node.fullName === "svg:style" ||
+      node.fullName === "svg:script" ||
       (isUnknownNamespace(node) &&
         (node.name === "script" || node.name === "style")))
   );


Test patch:
diff --git a/tests/config/utils/check-parsers.js b/tests/config/utils/check-parsers.js
index 166b37619f6f..a8def844d115 100644
--- a/tests/config/utils/check-parsers.js
+++ b/tests/config/utils/check-parsers.js
@@ -46,7 +46,10 @@ const categoryParsers = new Map([
     "handlebars",
     { parsers: ["glimmer"], verifyParsers: [], extensions: [".hbs"] },
   ],
-  ["html", { parsers: ["html"], verifyParsers: [], extensions: [".html"] }],
+  [
+    "html",
+    { parsers: ["html"], verifyParsers: [], extensions: [".html", ".svg"] },
+  ],
   ["mjml", { parsers: ["html"], verifyParsers: [], extensions: [".mjml"] }],
   [
     "js",
diff --git a/tests/format/html/svg/__snapshots__/jsfmt.spec.js.snap b/tests/format/html/svg/__snapshots__/jsfmt.spec.js.snap
index ba70e2d935ac..4bbcb552cdc8 100644
--- a/tests/format/html/svg/__snapshots__/jsfmt.spec.js.snap
+++ b/tests/format/html/svg/__snapshots__/jsfmt.spec.js.snap
@@ -19,16 +19,7 @@ printWidth: 80
 </html>
 
 <svg viewBox="0 0 200 200" xmlns="http://www.w3.org/2000/svg">
-<defs /> <style >
-    polygon { fill: black }
-
-    div {
-  color: white;
-      font:18px serif;
-      height: 100%;
-      overflow: auto;
-    }
-  </style>
+<defs /> 
 
  <g>
   <g><polygon points="5,5 195,10 185,185 10,195" />
@@ -73,18 +64,6 @@ printWidth: 80
 
 <svg viewBox="0 0 200 200" xmlns="http://www.w3.org/2000/svg">
   <defs />
-  <style>
-    polygon {
-      fill: black;
-    }
-
-    div {
-      color: white;
-      font: 18px serif;
-      height: 100%;
-      overflow: auto;
-    }
-  </style>
 
   <g>
     <g>
diff --git a/tests/format/html/svg/embeded/__snapshots__/jsfmt.spec.js.snap b/tests/format/html/svg/embeded/__snapshots__/jsfmt.spec.js.snap
new file mode 100644
index 000000000000..f8796610d2ca
--- /dev/null
+++ b/tests/format/html/svg/embeded/__snapshots__/jsfmt.spec.js.snap
@@ -0,0 +1,253 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`svg.html - {"embeddedLanguageFormatting":"off"} format 1`] = `
+====================================options=====================================
+embeddedLanguageFormatting: "off"
+parsers: ["html"]
+printWidth: 80
+                                                                                | printWidth
+=====================================input======================================
+<!DOCTYPE html>
+<html>
+  <head>
+    <title>SVG</title>
+  </head>
+  <body>
+<svg viewBox="0 0 200 200" xmlns="http://www.w3.org/2000/svg">
+<script>
+document.addEventListener(
+'DOMContentLoaded', () => {
+  const element = document.getElementById('foo')
+   if (element) {
+element.fillStyle = 'currentColor'
+}
+});
+</script>
+<style >
+    polygon { fill: black }
+
+    div {
+  color: white;
+      font:18px serif;
+      height: 100%;
+      overflow: auto;
+    }
+  </style>
+</svg>
+  </body>
+</html>
+
+=====================================output=====================================
+<!doctype html>
+<html>
+  <head>
+    <title>SVG</title>
+  </head>
+  <body>
+    <svg viewBox="0 0 200 200" xmlns="http://www.w3.org/2000/svg">
+      <script>
+        document.addEventListener(
+        'DOMContentLoaded', () => {
+          const element = document.getElementById('foo')
+           if (element) {
+        element.fillStyle = 'currentColor'
+        }
+        });
+      </script>
+      <style>
+          polygon { fill: black }
+
+          div {
+        color: white;
+            font:18px serif;
+            height: 100%;
+            overflow: auto;
+          }
+      </style>
+    </svg>
+  </body>
+</html>
+
+================================================================================
+`;
+
+exports[`svg.html format 1`] = `
+====================================options=====================================
+parsers: ["html"]
+printWidth: 80
+                                                                                | printWidth
+=====================================input======================================
+<!DOCTYPE html>
+<html>
+  <head>
+    <title>SVG</title>
+  </head>
+  <body>
+<svg viewBox="0 0 200 200" xmlns="http://www.w3.org/2000/svg">
+<script>
+document.addEventListener(
+'DOMContentLoaded', () => {
+  const element = document.getElementById('foo')
+   if (element) {
+element.fillStyle = 'currentColor'
+}
+});
+</script>
+<style >
+    polygon { fill: black }
+
+    div {
+  color: white;
+      font:18px serif;
+      height: 100%;
+      overflow: auto;
+    }
+  </style>
+</svg>
+  </body>
+</html>
+
+=====================================output=====================================
+<!doctype html>
+<html>
+  <head>
+    <title>SVG</title>
+  </head>
+  <body>
+    <svg viewBox="0 0 200 200" xmlns="http://www.w3.org/2000/svg">
+      <script>
+        document.addEventListener("DOMContentLoaded", () => {
+          const element = document.getElementById("foo");
+          if (element) {
+            element.fillStyle = "currentColor";
+          }
+        });
+      </script>
+      <style>
+        polygon {
+          fill: black;
+        }
+
+        div {
+          color: white;
+          font: 18px serif;
+          height: 100%;
+          overflow: auto;
+        }
+      </style>
+    </svg>
+  </body>
+</html>
+
+================================================================================
+`;
+
+exports[`svg.svg - {"embeddedLanguageFormatting":"off"} format 1`] = `
+====================================options=====================================
+embeddedLanguageFormatting: "off"
+parsers: ["html"]
+printWidth: 80
+                                                                                | printWidth
+=====================================input======================================
+<svg viewBox="0 0 200 200" xmlns="http://www.w3.org/2000/svg">
+<script>
+document.addEventListener(
+'DOMContentLoaded', () => {
+  const element = document.getElementById('foo')
+   if (element) {
+element.fillStyle = 'currentColor'
+}
+});
+</script>
+<style >
+    polygon { fill: black }
+
+    div {
+  color: white;
+      font:18px serif;
+      height: 100%;
+      overflow: auto;
+    }
+  </style>
+</svg>
+
+=====================================output=====================================
+<svg viewBox="0 0 200 200" xmlns="http://www.w3.org/2000/svg">
+  <script>
+    document.addEventListener(
+    'DOMContentLoaded', () => {
+      const element = document.getElementById('foo')
+       if (element) {
+    element.fillStyle = 'currentColor'
+    }
+    });
+  </script>
+  <style>
+      polygon { fill: black }
+
+      div {
+    color: white;
+        font:18px serif;
+        height: 100%;
+        overflow: auto;
+      }
+  </style>
+</svg>
+
+================================================================================
+`;
+
+exports[`svg.svg format 1`] = `
+====================================options=====================================
+parsers: ["html"]
+printWidth: 80
+                                                                                | printWidth
+=====================================input======================================
+<svg viewBox="0 0 200 200" xmlns="http://www.w3.org/2000/svg">
+<script>
+document.addEventListener(
+'DOMContentLoaded', () => {
+  const element = document.getElementById('foo')
+   if (element) {
+element.fillStyle = 'currentColor'
+}
+});
+</script>
+<style >
+    polygon { fill: black }
+
+    div {
+  color: white;
+      font:18px serif;
+      height: 100%;
+      overflow: auto;
+    }
+  </style>
+</svg>
+
+=====================================output=====================================
+<svg viewBox="0 0 200 200" xmlns="http://www.w3.org/2000/svg">
+  <script>
+    document.addEventListener("DOMContentLoaded", () => {
+      const element = document.getElementById("foo");
+      if (element) {
+        element.fillStyle = "currentColor";
+      }
+    });
+  </script>
+  <style>
+    polygon {
+      fill: black;
+    }
+
+    div {
+      color: white;
+      font: 18px serif;
+      height: 100%;
+      overflow: auto;
+    }
+  </style>
+</svg>
+
+================================================================================
+`;
diff --git a/tests/format/html/svg/embeded/jsfmt.spec.js b/tests/format/html/svg/embeded/jsfmt.spec.js
new file mode 100644
index 000000000000..75e3c2373e26
--- /dev/null
+++ b/tests/format/html/svg/embeded/jsfmt.spec.js
@@ -0,0 +1,2 @@
+run_spec(import.meta, ["html"]);
+run_spec(import.meta, ["html"], { embeddedLanguageFormatting: "off" });
diff --git a/tests/format/html/svg/embeded/svg.html b/tests/format/html/svg/embeded/svg.html
new file mode 100644
index 000000000000..6934c58a7604
--- /dev/null
+++ b/tests/format/html/svg/embeded/svg.html
@@ -0,0 +1,29 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <title>SVG</title>
+  </head>
+  <body>
+<svg viewBox="0 0 200 200" xmlns="http://www.w3.org/2000/svg">
+<script>
+document.addEventListener(
+'DOMContentLoaded', () => {
+  const element = document.getElementById('foo')
+   if (element) {
+element.fillStyle = 'currentColor'
+}
+});
+</script>
+<style >
+    polygon { fill: black }
+
+    div {
+  color: white;
+      font:18px serif;
+      height: 100%;
+      overflow: auto;
+    }
+  </style>
+</svg>
+  </body>
+</html>
diff --git a/tests/format/html/svg/embeded/svg.svg b/tests/format/html/svg/embeded/svg.svg
new file mode 100644
index 000000000000..2a86602fb068
--- /dev/null
+++ b/tests/format/html/svg/embeded/svg.svg
@@ -0,0 +1,21 @@
+<svg viewBox="0 0 200 200" xmlns="http://www.w3.org/2000/svg">
+<script>
+document.addEventListener(
+'DOMContentLoaded', () => {
+  const element = document.getElementById('foo')
+   if (element) {
+element.fillStyle = 'currentColor'
+}
+});
+</script>
+<style >
+    polygon { fill: black }
+
+    div {
+  color: white;
+      font:18px serif;
+      height: 100%;
+      overflow: auto;
+    }
+  </style>
+</svg>
diff --git a/tests/format/html/svg/svg.html b/tests/format/html/svg/svg.html
index 7009b55de539..21f7256f3f80 100644
--- a/tests/format/html/svg/svg.html
+++ b/tests/format/html/svg/svg.html
@@ -11,16 +11,7 @@
 </html>
 
 <svg viewBox="0 0 200 200" xmlns="http://www.w3.org/2000/svg">
-<defs /> <style >
-    polygon { fill: black }
-
-    div {
-  color: white;
-      font:18px serif;
-      height: 100%;
-      overflow: auto;
-    }
-  </style>
+<defs /> 
 
  <g>
   <g><polygon points="5,5 195,10 185,185 10,195" />