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docs(plugin-legacy): add note about IE11, close #3362 #3389

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May 12, 2021
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docs(plugin-legacy): add note about IE11, close #3362 #3389

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18 changes: 17 additions & 1 deletion packages/plugin-legacy/README.md
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Expand Up @@ -29,6 +29,22 @@ export default {
}
```

When targeting IE11, you also need `regenerator-runtime`:

```js
// vite.config.js
import legacy from '@vitejs/plugin-legacy'

export default {
plugins: [
legacy({
targets: ['ie >= 11'],
additionalLegacyPolyfills: ['regenerator-runtime/runtime']
})
]
}
```

## Options

### `targets`
Expand Down Expand Up @@ -57,7 +73,7 @@ export default {

Add custom imports to the legacy polyfills chunk. Since the usage-based polyfill detection only covers ES language features, it may be necessary to manually specify additional DOM API polyfills using this option.

Note: if additional plyfills are needed for both the modern and legacy chunks, they can simply be imported in the application source code.
Note: if additional polyfills are needed for both the modern and legacy chunks, they can simply be imported in the application source code.

### `ignoreBrowserslistConfig`

Expand Down