refactor(legacy)!: remove ignoreBrowserslistConfig option (#14429)

Co-authored-by: Bjorn Lu <[email protected]>

Author: sapphi-red

packages/plugin-legacy/README.md

@@ -44,6 +44,8 @@ npm add -D terser
 
   The query is also [Browserslist compatible](https://github.com/browserslist/browserslist). See [Browserslist Best Practices](https://github.com/browserslist/browserslist#best-practices) for more details.
 
+  If it's not set, plugin-legacy will load [the browserslist config sources](https://github.com/browserslist/browserslist#queries) and then fallback to the default value.
+
 ### `polyfills`
 
 - **Type:** `boolean | string[]`
@@ -63,18 +65,6 @@ npm add -D terser
 
   Note: if additional polyfills are needed for both the modern and legacy chunks, they can simply be imported in the application source code.
 
-### `ignoreBrowserslistConfig`
-
-- **Type:** `boolean`
-- **Default:** `false`
-
-  `@babel/preset-env` automatically detects [`browserslist` config sources](https://github.com/browserslist/browserslist#browserslist-):
-
-  - `browserslist` field in `package.json`
-  - `.browserslistrc` file in cwd.
-
-  Set to `true` to ignore these sources.
-
 ### `modernPolyfills`
 
 - **Type:** `boolean | string[]`

packages/plugin-legacy/src/index.ts

@@ -461,10 +461,7 @@ function viteLegacyPlugin(options: Options = {}): Plugin[] {
           ],
           [
             (await import('@babel/preset-env')).default,
-            createBabelPresetEnvOptions(targets, {
-              needPolyfills,
-              ignoreBrowserslistConfig: options.ignoreBrowserslistConfig,
-            }),
+            createBabelPresetEnvOptions(targets, { needPolyfills }),
           ],
         ],
       })
@@ -641,9 +638,7 @@ export async function detectPolyfills(
     presets: [
       [
         (await import('@babel/preset-env')).default,
-        createBabelPresetEnvOptions(targets, {
-          ignoreBrowserslistConfig: true,
-        }),
+        createBabelPresetEnvOptions(targets, {}),
       ],
     ],
   })
@@ -662,10 +657,7 @@ export async function detectPolyfills(
 
 function createBabelPresetEnvOptions(
   targets: any,
-  {
-    needPolyfills = true,
-    ignoreBrowserslistConfig,
-  }: { needPolyfills?: boolean; ignoreBrowserslistConfig?: boolean },
+  { needPolyfills = true }: { needPolyfills?: boolean },
 ) {
   return {
     targets,
@@ -680,7 +672,7 @@ function createBabelPresetEnvOptions(
         }
       : undefined,
     shippedProposals: true,
-    ignoreBrowserslistConfig,
+    ignoreBrowserslistConfig: true,
   }
 }
 

packages/plugin-legacy/src/types.ts

@@ -3,10 +3,6 @@ export interface Options {
    * default: 'defaults'
    */
   targets?: string | string[] | { [key: string]: string }
-  /**
-   * default: false
-   */
-  ignoreBrowserslistConfig?: boolean
   /**
    * default: true
    */