fix: correct import.meta.url shim (#218)

Author: fi3ework

e2e/cases/shims/index.test.ts

@@ -21,7 +21,7 @@ test('shims for import.meta.url in CJS', async () => {
   const { entries } = await buildAndGetResults(fixturePath);
   for (const shim of [
     `var __rslib_import_meta_url__ = /*#__PURE__*/ function() {
-    'undefined' == typeof document ? new (require('url'.replace('', ''))).URL('file:' + __filename).href : document.currentScript && document.currentScript.src || new URL('main.js', document.baseURI).href;
+    return 'undefined' == typeof document ? new (require('url'.replace('', ''))).URL('file:' + __filename).href : document.currentScript && document.currentScript.src || new URL('main.js', document.baseURI).href;
 }();`,
     'console.log(__rslib_import_meta_url__);',
   ]) {

packages/core/src/plugins/cjsShim.ts

@@ -1,7 +1,7 @@
 import { type RsbuildPlugin, rspack } from '@rsbuild/core';
 
 const importMetaUrlShim = `var __rslib_import_meta_url__ = /*#__PURE__*/ (function () {
-  typeof document === 'undefined'
+  return typeof document === 'undefined'
     ? new (require('url'.replace('', '')).URL)('file:' + __filename).href
     : (document.currentScript && document.currentScript.src) ||
       new URL('main.js', document.baseURI).href;