From 5309d7bda16eeea740c0e1e94b878e8d0f248b82 Mon Sep 17 00:00:00 2001
From: Andreas Fehn <fehnomenal@fehn.systems>
Date: Thu, 21 Nov 2024 16:48:15 +0100
Subject: [PATCH] fix: use script lang regex from svelte compiler (#1028)

---
 .changeset/swift-dolphins-cheat.md               | 5 +++++
 packages/vite-plugin-svelte/src/utils/compile.js | 6 +++---
 2 files changed, 8 insertions(+), 3 deletions(-)
 create mode 100644 .changeset/swift-dolphins-cheat.md

diff --git a/.changeset/swift-dolphins-cheat.md b/.changeset/swift-dolphins-cheat.md
new file mode 100644
index 000000000..2692939c6
--- /dev/null
+++ b/.changeset/swift-dolphins-cheat.md
@@ -0,0 +1,5 @@
+---
+'@sveltejs/vite-plugin-svelte': patch
+---
+
+Allow script tags to span multiple lines
diff --git a/packages/vite-plugin-svelte/src/utils/compile.js b/packages/vite-plugin-svelte/src/utils/compile.js
index 83f2c840d..4c0e524c9 100644
--- a/packages/vite-plugin-svelte/src/utils/compile.js
+++ b/packages/vite-plugin-svelte/src/utils/compile.js
@@ -14,7 +14,7 @@ import { enhanceCompileError } from './error.js';
 // which is closer to the other regexes in at least not falling into commented script
 // but ideally would be shared exactly with svelte and other tools that use it
 const scriptLangRE =
-	/<!--[^]*?-->|<script (?:[^>]*|(?:[^=>'"/]+=(?:"[^"]*"|'[^']*'|[^>\s]+)\s+)*)lang=["']?([^"' >]+)["']?[^>]*>/g;
+	/<!--[^]*?-->|<script\s+(?:[^>]*|(?:[^=>'"/]+=(?:"[^"]*"|'[^']*'|[^>\s]+)\s+)*)lang=(["'])?([^"' >]+)\1[^>]*>/g;
 
 /**
  * @returns {import('../types/compile.d.ts').CompileSvelte}
@@ -172,8 +172,8 @@ export function createCompileSvelte() {
 
 		let lang = 'js';
 		for (const match of code.matchAll(scriptLangRE)) {
-			if (match[1]) {
-				lang = match[1];
+			if (match[2]) {
+				lang = match[2];
 				break;
 			}
 		}