25 lines
574 B
Markdown
25 lines
574 B
Markdown
|
---
|
||
|
|
sidebar_label: CommonEventEmitter.once
|
||
|
|
---
|
||
|
|
|
||
|
|
# CommonEventEmitter.once() method
|
||
|
|
|
||
|
|
**Signature:**
|
||
|
|
|
||
|
|
```typescript
|
||
|
|
interface CommonEventEmitter {
|
||
|
|
once(event: EventType, handler: Handler): CommonEventEmitter;
|
||
|
|
}
|
||
|
|
```
|
||
|
|
|
||
|
|
## Parameters
|
||
|
|
|
||
|
|
| Parameter | Type | Description |
|
||
|
|
| --------- | ------------------------------------- | ----------- |
|
||
|
|
| event | [EventType](./puppeteer.eventtype.md) | |
|
||
|
|
| handler | [Handler](./puppeteer.handler.md) | |
|
||
|
|
|
||
|
|
**Returns:**
|
||
|
|
|
||
|
|
[CommonEventEmitter](./puppeteer.commoneventemitter.md)
|