VideoTrackList: addtrack event

The addtrack event is fired when a video track is added to a VideoTrackList.

Syntax

Use the event name in methods like addEventListener(), or set an event handler property.

addEventListener('addtrack', event => { })

onaddtrack = event => { }

Event type

Event properties

In addition to the properties listed below, properties from the parent interface, Event, are available.

track Read only

The newly-added VideoTrack the event is in reference to.

Examples

Using addEventListener():

const videoElement = document.querySelector('video');

videoElement.videoTracks.addEventListener('addtrack', (event) => {
  console.log(`Video track: ${event.track.label} added`);
});

Using the onaddtrack event handler property:

const videoElement = document.querySelector('video');

videoElement.videoTracks.onaddtrack = (event) => {
  console.log(`Video track: ${event.track.label} added`);
};

Specifications

Specification
HTML Standard
# event-media-addtrack
HTML Standard
# handler-tracklist-onaddtrack

Browser compatibility

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See also