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. |
