puppeteer/website/versioned_docs/version-19.6.0/api/puppeteer.eventemitter.md
release-please[bot] e13e9647fc
chore: release main (#9501)
🤖 I have created a release *beep* *boop*
---


<details><summary>puppeteer: 19.6.0</summary>

##
[19.6.0](https://github.com/puppeteer/puppeteer/compare/puppeteer-v19.5.2...puppeteer-v19.6.0)
(2023-01-23)


### Miscellaneous Chores

* **puppeteer:** Synchronize puppeteer versions


### Dependencies

* The following workspace dependencies were updated
  * dependencies
    * puppeteer-core bumped from 19.5.2 to 19.6.0
</details>

<details><summary>puppeteer-core: 19.6.0</summary>

##
[19.6.0](https://github.com/puppeteer/puppeteer/compare/puppeteer-core-v19.5.2...puppeteer-core-v19.6.0)
(2023-01-23)


### Features

* **chromium:** roll to Chromium 110.0.5479.0 (r1083080)
([#9500](https://github.com/puppeteer/puppeteer/issues/9500))
([06e816b](06e816bbfa)),
closes [#9470](https://github.com/puppeteer/puppeteer/issues/9470)
* **page:** Adding support for referrerPolicy in `page.goto`
([#9561](https://github.com/puppeteer/puppeteer/issues/9561))
([e3d69ec](e3d69ec554))


### Bug Fixes

* firefox revision resolution should not update chrome revision
([#9507](https://github.com/puppeteer/puppeteer/issues/9507))
([f59bbf4](f59bbf4014)),
closes [#9461](https://github.com/puppeteer/puppeteer/issues/9461)
* improve screenshot method types
([#9529](https://github.com/puppeteer/puppeteer/issues/9529))
([6847f88](6847f8835f))
</details>

---
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Please](https://github.com/googleapis/release-please). See
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---
sidebar_label: EventEmitter
---
# EventEmitter class
The EventEmitter class that many Puppeteer classes extend.
#### Signature:
```typescript
export declare class EventEmitter implements CommonEventEmitter
```
**Implements:** [CommonEventEmitter](./puppeteer.commoneventemitter.md)
## Remarks
This allows you to listen to events that Puppeteer classes fire and act accordingly. Therefore you'll mostly use [on](./puppeteer.eventemitter.on.md) and [off](./puppeteer.eventemitter.off.md) to bind and unbind to event listeners.
The constructor for this class is marked as internal. Third-party code should not call the constructor directly or create subclasses that extend the `EventEmitter` class.
## Methods
| Method | Modifiers | Description |
| ---------------------------------------------------------------------------- | --------- | ------------------------------------------------------------------------------------------------ |
| [addListener(event, handler)](./puppeteer.eventemitter.addlistener.md) | | Add an event listener. |
| [emit(event, eventData)](./puppeteer.eventemitter.emit.md) | | Emit an event and call any associated listeners. |
| [listenerCount(event)](./puppeteer.eventemitter.listenercount.md) | | Gets the number of listeners for a given event. |
| [off(event, handler)](./puppeteer.eventemitter.off.md) | | Remove an event listener from firing. |
| [on(event, handler)](./puppeteer.eventemitter.on.md) | | Bind an event listener to fire when an event occurs. |
| [once(event, handler)](./puppeteer.eventemitter.once.md) | | Like <code>on</code> but the listener will only be fired once and then it will be removed. |
| [removeAllListeners(event)](./puppeteer.eventemitter.removealllisteners.md) | | Removes all listeners. If given an event argument, it will remove only listeners for that event. |
| [removeListener(event, handler)](./puppeteer.eventemitter.removelistener.md) | | Remove an event listener. |