puppeteer/docs/api/puppeteer.commoneventemitter.listenercount.md

---
sidebar_label: CommonEventEmitter.listenerCount
---
# CommonEventEmitter.listenerCount() method

**Signature:**

```typescript
interface CommonEventEmitter {listenerCount(event: string): number;}
```

## Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  event | string |  |

**Returns:**

number