off - Cognigy Documentation

Removes a previously registered event listener.

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(). 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

Last modified on April 21, 2026