The Publisher(s) included in the SDK are event emitters with a basic API for subscribing and unsubscribing to events either by name or by wildcard.

To subscribe to all events from a publisher:

function handlePublisherEvent (event) {
  // The name of the event:
  const { type } = event
  // The dispatching publisher instance:
  const { publisher } = event
  // Optional data releated to the event (not available on all events):
  const { data } = event
}

const publisher = new RTCPublisher()
publisher.on('*', handlePublisherEvent)

The * type assignment is considered a “Wildcard” subscription – all events being issued by the publisher instance will invoke the assign event handler.

To unsubscribe to all events from a publisher after assinging an event handler:

publisher.off('*', handlePublisherEvent)

The following sections of this document describe the event types that can also be listened to directly, instead of using the * wildcard.