refactor: remove cjs build from plugin-legacy

packages/plugin-legacy/package.json

@@ -13,19 +13,10 @@
     "vite-plugin",
     "@vitejs/plugin-legacy"
   ],
-  "main": "./dist/index.cjs",
-  "module": "./dist/index.js",
-  "types": "./dist/index.d.ts",
-  "exports": {
-    ".": {
-      "import": "./dist/index.js",
-      "require": "./dist/index.cjs"
-    }
-  },
+  "exports": "./dist/index.js",
   "scripts": {
     "dev": "tsdown --watch",
-    "build": "tsdown && pnpm run patch-cjs",
-    "patch-cjs": "tsx ../../scripts/patchCJS.ts",
+    "build": "tsdown",
     "prepublishOnly": "npm run build"
   },
   "engines": {

packages/plugin-legacy/src/index.ts

@@ -997,3 +997,15 @@ export const cspHashes = [
 export type { Options }
 
 export default viteLegacyPlugin
+
+// Compat for require
+function viteLegacyPluginCjs(this: unknown, options: Options): Plugin[] {
+  return viteLegacyPlugin.call(this, options)
+}
+Object.assign(viteLegacyPluginCjs, {
+  cspHashes,
+  default: viteLegacyPluginCjs,
+  detectPolyfills,
+})
+
+export { viteLegacyPluginCjs as 'module.exports' }

packages/plugin-legacy/tsdown.config.ts

@@ -2,13 +2,6 @@ import { defineConfig } from 'tsdown'
 
 export default defineConfig({
   entry: ['src/index.ts'],
-  format: ['esm', 'cjs'],
   target: 'node20',
   tsconfig: false, // disable tsconfig `paths` when bundling
-  outputOptions(opts, format) {
-    if (format === 'cjs') {
-      opts.exports = 'named'
-    }
-    return opts
-  },
 })