From e3de793c4703cd2c6c7245787ed89753d2fcca86 Mon Sep 17 00:00:00 2001
From: Simon H <5968653+dummdidumm@users.noreply.github.com>
Date: Mon, 19 Sep 2022 17:07:07 +0200
Subject: [PATCH] [fix] don't strip type="application/.." tags (#6887)

* [fix] don't strip type="application/.." tags

Fixes #6862

* changeset
---
 .changeset/cyan-pianos-bake.md                              | 5 +++++
 packages/package/src/utils.js                               | 6 +++++-
 .../package/test/fixtures/typescript/expected/Plain.svelte  | 4 ++++
 .../package/test/fixtures/typescript/src/lib/Plain.svelte   | 4 ++++
 packages/package/test/fixtures/typescript/svelte.config.js  | 4 +++-
 5 files changed, 21 insertions(+), 2 deletions(-)
 create mode 100644 .changeset/cyan-pianos-bake.md

diff --git a/.changeset/cyan-pianos-bake.md b/.changeset/cyan-pianos-bake.md
new file mode 100644
index 000000000000..7991f006db89
--- /dev/null
+++ b/.changeset/cyan-pianos-bake.md
@@ -0,0 +1,5 @@
+---
+'@sveltejs/package': patch
+---
+
+[fix] don't strip `type="application/.."` tags
diff --git a/packages/package/src/utils.js b/packages/package/src/utils.js
index 97c3b03dbf3c..0b263857b54c 100644
--- a/packages/package/src/utils.js
+++ b/packages/package/src/utils.js
@@ -49,7 +49,11 @@ export function resolve_lib_alias(file, content, config) {
  */
 export function strip_lang_tags(content) {
 	return content
-		.replace(/(<!--[^]*?-->)|(<script[^>]*?)\s(?:type|lang)=(["']).*?\3/g, '$1$2')
+		.replace(
+			/(<!--[^]*?-->)|(<script[^>]*?)\s(?:type|lang)=(["'])(.*?)\3/g,
+			// things like application/ld+json should be kept as-is. Preprocessed languages are "ts" etc
+			(match, s1, s2, _, s4) => (s4.startsWith('application/') ? match : (s1 ?? '') + (s2 ?? ''))
+		)
 		.replace(/(<!--[^]*?-->)|(<style[^>]*?)\s(?:type|lang)=(["']).*?\3/g, '$1$2');
 }
 
diff --git a/packages/package/test/fixtures/typescript/expected/Plain.svelte b/packages/package/test/fixtures/typescript/expected/Plain.svelte
index b49daed30015..29329add3320 100644
--- a/packages/package/test/fixtures/typescript/expected/Plain.svelte
+++ b/packages/package/test/fixtures/typescript/expected/Plain.svelte
@@ -2,3 +2,7 @@
 	/** @type {import('./foo').Foo} */
 	export let foo;
 </script>
+
+<svelte:head>
+  <script type="application/ld+json">{JSON.stringify(jsonLd)}</script>
+</svelte:head>
diff --git a/packages/package/test/fixtures/typescript/src/lib/Plain.svelte b/packages/package/test/fixtures/typescript/src/lib/Plain.svelte
index b49daed30015..29329add3320 100644
--- a/packages/package/test/fixtures/typescript/src/lib/Plain.svelte
+++ b/packages/package/test/fixtures/typescript/src/lib/Plain.svelte
@@ -2,3 +2,7 @@
 	/** @type {import('./foo').Foo} */
 	export let foo;
 </script>
+
+<svelte:head>
+  <script type="application/ld+json">{JSON.stringify(jsonLd)}</script>
+</svelte:head>
diff --git a/packages/package/test/fixtures/typescript/svelte.config.js b/packages/package/test/fixtures/typescript/svelte.config.js
index 6bd253bdf27d..8e74287e522a 100644
--- a/packages/package/test/fixtures/typescript/svelte.config.js
+++ b/packages/package/test/fixtures/typescript/svelte.config.js
@@ -1,5 +1,7 @@
 import preprocess from 'svelte-preprocess';
 
 export default {
-	preprocess: preprocess()
+	preprocess: preprocess({
+		preserve: ['ld+json']
+	})
 };