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once(eventName, callback) Subscribes to a Daily call event and fires the callback exactly once, then automatically removes the listener. Follows the Node.js EventEmitter interface. Returns this, so calls can be chained.

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Parameters

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eventName
DailyEvent
required
The event name to subscribe to. See the Events reference for all available events.
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callback
function
required
Function called when the event fires. Automatically removed after the first invocation.

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Return value

Returns this (the DailyCall instance) for chaining.

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Example

// Wait for the first joined-meeting event, then stop listening
call.once('joined-meeting', ({ participants }) => {
  console.log('Joined for the first time:', participants);
});

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See also

Methods

Guides