## Documentation Index

Fetch the complete documentation index at: [/llms.txt](https://docs.cognigy.com/llms.txt)

Use this file to discover all available pages before exploring further.

## Signature

```
client.off<T extends EventName>(event: T, callback: EventCallback<T>): this;
```

## Parameters

| Parameter | Type | Description | Required |
| --- | --- | --- | --- |
| `event` | `EventName` | The name of the event to stop listening for. | Yes |
| `callback` | `EventCallback<T>` | The callback function to remove. | Yes |

## Returns

`this` — the client instance, allowing method chaining.

You must pass the same function reference that was used with [`on()`](https://docs.cognigy.com/click-to-call/sdk/api-reference/on). Anonymous functions can’t be removed.

## Example

```
const onAnswered = (session) => {
  console.log('Call answered:', session.id);
};

// Subscribe
client.on('answered', onAnswered);

// Unsubscribe
client.off('answered', onAnswered);
```

## More Information

- [on](https://docs.cognigy.com/click-to-call/sdk/api-reference/on)
- [Event Reference](https://docs.cognigy.com/click-to-call/sdk/event-reference/overview)

Last modified on April 21, 2026