---
sidebar_label: Page.on
# Page.on() method
Listen to page events.
:::note
This method exists to define event typings and handle proper wireup of cooperative request interception. Actual event listening and dispatching is delegated to [EventEmitter](./puppeteer.eventemitter.md).
:::
**Signature:**
```typescript
class Page {
on<K extends keyof PageEventObject>(
eventName: K,
handler: (event: PageEventObject[K]) => void
): EventEmitter;
}
```
## Parameters
| Parameter | Type | Description |
| --------- | -------------------------------------------------------------------------- | ----------- |
| eventName | K | |
| handler | (event: [PageEventObject](./puppeteer.pageeventobject.md)\[K\]) => void | |
**Returns:**
[EventEmitter](./puppeteer.eventemitter.md)
