test(html): do not wrap duplicated html (vitejs#11515)

futurGH · Feb 26, 2023 · d5658fc · d5658fc
1 parent 801bc7f
commit d5658fc
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/playground/html/vite.config.js b/playground/html/vite.config.js
@@ -41,6 +41,10 @@ module.exports = {
           if (html.includes('/@vite/client')) {
             throw new Error('pre transform applied at wrong time!')
           }
+
+          const doctypeRE = /<!doctype html>/i
+          if (doctypeRE.test(html)) return
+
           const head = `
   <head lang="en">
     <meta charset="UTF-8">