up

packages/core/src/config.ts

@@ -542,50 +542,17 @@ const composeFormatConfig = (format: Format): RsbuildConfig => {
   }
 };
 
-const resolveShims = (shims?: Shims) => {
-  const resolvedShims = {
+const resolveShims = (shims?: Shims): ResolvedShims => {
+  return {
     cjs: {
-      'import.meta.url': true,
+      'import.meta.url': shims?.cjs?.['import.meta.url'] ?? true,
     },
     esm: {
-      __filename: true,
-      __dirname: true,
-      require: false,
+      __filename: shims?.esm?.__filename ?? false,
+      __dirname: shims?.esm?.__dirname ?? false,
+      require: shims?.esm?.require ?? false,
     },
   };
-
-  if (!shims) {
-    return resolvedShims;
-  }
-
-  if (shims.cjs) {
-    if (typeof shims.cjs === 'boolean') {
-      if (shims.cjs === true) {
-        resolvedShims.cjs['import.meta.url'] = true;
-      } else {
-        resolvedShims.cjs['import.meta.url'] = false;
-      }
-    } else {
-      resolvedShims.cjs['import.meta.url'] =
-        shims.cjs['import.meta.url'] ?? false;
-    }
-  }
-
-  if (shims.esm) {
-    if (typeof shims.esm === 'boolean') {
-      if (shims.esm === true) {
-        resolvedShims.esm.__filename = true;
-        resolvedShims.esm.__dirname = true;
-        resolvedShims.esm.require = true;
-      }
-    } else {
-      resolvedShims.esm.__filename = shims.esm.__filename ?? false;
-      resolvedShims.esm.__dirname = shims.esm.__dirname ?? false;
-      resolvedShims.esm.require = shims.esm.require ?? false;
-    }
-  }
-
-  return resolvedShims;
 };
 
 const composeShimsConfig = (

packages/core/src/types/config/index.ts

@@ -49,18 +49,14 @@ export type BannerAndFooter = {
 };
 
 export type Shims = {
-  cjs?:
-    | boolean
-    | {
-        'import.meta.url'?: boolean;
-      };
-  esm?:
-    | boolean
-    | {
-        __filename?: boolean;
-        __dirname?: boolean;
-        require?: boolean;
-      };
+  cjs?: {
+    'import.meta.url'?: boolean;
+  };
+  esm?: {
+    __filename?: boolean;
+    __dirname?: boolean;
+    require?: boolean;
+  };
 };
 
 export type ResolvedShims = {

packages/core/tests/__snapshots__/config.test.ts.snap

@@ -112,8 +112,8 @@ exports[`Should compose create Rsbuild config correctly > Merge Rsbuild config 1
               },
             },
             "node": {
-              "__dirname": "node-module",
-              "__filename": "node-module",
+              "__dirname": false,
+              "__filename": false,
             },
             "optimization": {
               "concatenateModules": true,

tests/integration/shims/cjs/rslib.config.ts

@@ -6,7 +6,7 @@ export default defineConfig({
     generateBundleEsmConfig(),
     generateBundleCjsConfig({
       shims: {
-        cjs: true,
+        cjs: { 'import.meta.url': true },
       },
     }),
   ],

tests/integration/shims/esm/rslib.config.ts

@@ -4,7 +4,7 @@ import { generateBundleEsmConfig } from 'test-helper';
 export default defineConfig({
   lib: [
     generateBundleEsmConfig({
-      shims: { esm: true },
+      shims: { esm: { __dirname: true, __filename: true } },
       source: {
         entry: {
           index: './src/index.ts',
@@ -17,7 +17,7 @@ export default defineConfig({
       },
     }),
     generateBundleEsmConfig({
-      shims: { esm: true },
+      shims: { esm: { __dirname: true, __filename: true } },
       syntax: 'esnext',
       source: {
         entry: {
@@ -31,7 +31,7 @@ export default defineConfig({
       },
     }),
     generateBundleEsmConfig({
-      shims: { esm: true },
+      shims: { esm: { __dirname: true, __filename: true } },
       syntax: 'esnext',
       source: {
         entry: {

tests/integration/shims/esm/rslibShimsDisabled.config.ts

@@ -3,7 +3,7 @@ import config from './rslib.config';
 
 export default defineConfig({
   ...config,
-  lib: [config.lib[2]!].map((libConfig) => {
+  lib: [config.lib[0]!, config.lib[2]!].map((libConfig) => {
     libConfig.output!.distPath!.root =
       libConfig.output!.distPath!.root!.replace(
         './dist/enabled',

tests/integration/shims/index.test.ts

@@ -61,8 +61,11 @@ describe('ESM shims disabled', async () => {
       fixturePath,
       configPath: './rslibShimsDisabled.config.ts',
     });
+
+    expect(entries.esm0).not.toContain('fileURLToPath');
+
     const context = vm.createContext({});
-    const module = new vm.SourceTextModule(entries.esm, {
+    const module = new vm.SourceTextModule(entries.esm1!, {
       context,
     });
 

website/docs/en/config/lib/shims.mdx

@@ -2,45 +2,39 @@
 
 - **Type:**
 
-```ts
-type Shims = {
-  cjs?:
-    | boolean
-    | {
-        'import.meta.url'?: boolean;
-      };
-  esm?:
-    | boolean
-    | {
-        __filename?: boolean;
-        __dirname?: boolean;
-        require?: boolean;
-      };
-};
-```
+  ```ts
+  type Shims = {
+    cjs?: {
+      'import.meta.url'?: boolean;
+    };
+    esm?: {
+      __filename?: boolean;
+      __dirname?: boolean;
+      require?: boolean;
+    };
+  };
+  ```
 
 - **Default:**
 
-```js
-{
-  cjs: {
-    'import.meta.url': true,
-  },
-  esm: {
-    __filename: true,
-    __dirname: true,
-    require: false,
-  },
-}
-```
+  ```js
+  {
+    cjs: {
+      'import.meta.url': true,
+    },
+    esm: {
+      __filename: false,
+      __dirname: false,
+      require: false,
+    },
+  }
+  ```
 
 Used to configure the shims for CommonJS and ESM output.
 
 ## shims.cjs
 
-- set to `true` to enable all shims for CommonJS output.
-- set to `false` to disable all shims for CommonJS output.
-- set the fields to `true` to enable the corresponding shims for CommonJS output.
+Set the fields to `true` to enable the corresponding shims for CommonJS output.
 
 ### shims.cjs['import.meta.url']
 
@@ -80,9 +74,7 @@ Options:
 
 ## shims.esm
 
-- set to `true` to enable all shims for ESM output.
-- set to `false` to disable all shims for ESM output.
-- set the fields to `true` to enable the corresponding shims for ESM output.
+Set the fields to `true` to enable the corresponding shims for ESM output.
 
 ### shims.esm.\_\_filename