# FileDialogViewMixinConstructor

typedef

Constructor returned by [`FileDialogViewMixin`](module_ui_button_filedialogbuttonview.md#function-FileDialogViewMixin). Use it to name a mixin base class before extending it.

```typescript
const MyFileDialogViewBase: FileDialogViewMixinConstructor<typeof BaseClass> = FileDialogViewMixin( BaseClass );

class MyFileDialogView extends MyFileDialogViewBase {}
```

[See source](https://github.com/ckeditor/ckeditor5/blob/master/packages/ckeditor5-ui/src/button/filedialogbuttonview.ts#L26)

<a id="type-parameters">

## Type parameters

### `Base: extends Constructor<ButtonView>`

#### Value

`Mixed<Base, FileDialogButtonViewBase>`

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Full index of the CKEditor 5 API reference: [llms.txt](llms.txt)