fix: use proper esbuild loader for .cjs and .mjs files (#2215)

vitejs · Feb 24, 2021 · a0d922e · a0d922e
1 parent 58bed16
commit a0d922e
Showing 1 changed file with 7 additions and 1 deletion.
diff --git a/packages/vite/src/node/plugins/esbuild.ts b/packages/vite/src/node/plugins/esbuild.ts
@@ -56,8 +56,14 @@ export async function transformWithEsbuild(
   const ext = path.extname(
     /\.\w+$/.test(filename) ? filename : cleanUrl(filename)
   )
+
+  let loader = ext.slice(1)
+  if (loader === 'cjs' || loader === 'mjs') {
+    loader = 'js'
+  }
+
   const resolvedOptions = {
-    loader: ext.slice(1) as Loader,
+    loader: loader as Loader,
     sourcemap: true,
     // ensure source file name contains full query
     sourcefile: filename,