puppeteer/docs/api/puppeteer.eventemitter.addlistener.md

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2022-07-05 13:41:43 +00:00
---
sidebar_label: EventEmitter.addListener
---
# EventEmitter.addListener() method
> Warning: This API is now obsolete.
>
> please use [EventEmitter.on()](./puppeteer.eventemitter.on.md) instead.
Add an event listener.
#### Signature:
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```typescript
class EventEmitter {
addListener(event: EventType, handler: Handler): EventEmitter;
}
```
## Parameters
| Parameter | Type | Description |
| --------- | ------------------------------------- | ----------- |
| event | [EventType](./puppeteer.eventtype.md) | |
| handler | [Handler](./puppeteer.handler.md) | |
**Returns:**
[EventEmitter](./puppeteer.eventemitter.md)