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

---
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:**

```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)