From a0dbac495d52280d81bca3109a66ee0a20125469 Mon Sep 17 00:00:00 2001
From: Divyansh Singh <40380293+brc-dd@users.noreply.github.com>
Date: Thu, 2 Jun 2022 18:02:49 +0530
Subject: [PATCH] fix: allow lang='ts' on scripts in markdown

---
 src/node/markdownToVue.ts | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/src/node/markdownToVue.ts b/src/node/markdownToVue.ts
index 273d4dc134f4..34036c2225fa 100644
--- a/src/node/markdownToVue.ts
+++ b/src/node/markdownToVue.ts
@@ -162,8 +162,9 @@ export async function createMarkdownToVueRenderFn(
 }
 
 const scriptRE = /<\/script>/
+const scriptLangTsRE = /<\s*script[^>]*\blang=['"]ts['"][^>]*/
 const scriptSetupRE = /<\s*script[^>]*\bsetup\b[^>]*/
-const scriptClientRe = /<\s*script[^>]*\bclient\b[^>]*/
+const scriptClientRE = /<\s*script[^>]*\bclient\b[^>]*/
 const defaultExportRE = /((?:^|\n|;)\s*)export(\s*)default/
 const namedDefaultExportRE = /((?:^|\n|;)\s*)export(.+)as(\s*)default/
 
@@ -176,10 +177,12 @@ function genPageDataCode(tags: string[], data: PageData) {
     return (
       scriptRE.test(tag) &&
       !scriptSetupRE.test(tag) &&
-      !scriptClientRe.test(tag)
+      !scriptClientRE.test(tag)
     )
   })
 
+  const isUsingTS = tags.findIndex((tag) => scriptLangTsRE.test(tag)) > -1
+
   if (existingScriptIndex > -1) {
     const tagSrc = tags[existingScriptIndex]
     // user has <script> tag inside markdown
@@ -196,7 +199,9 @@ function genPageDataCode(tags: string[], data: PageData) {
     )
   } else {
     tags.unshift(
-      `<script>${code}\nexport default {name:'${data.relativePath}'}</script>`
+      `<script ${isUsingTS ? 'lang="ts"' : ''}>${code}\nexport default {name:'${
+        data.relativePath
+      }'}</script>`
     )
   }