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[`ExtraButtonComponent`](ExtraButtonComponent) › [`onClick`](ExtraButtonComponent/onClick)
## ExtraButtonComponent.onClick() method
0.9.7
**Signature:**
```typescript
onClick(callback: () => any): this;
```
## Parameters
| Parameter | Type | Description |
| --- | --- | --- |
| <code>callback</code> | <code>() => any</code> | |
**Returns:**
`this`