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.

js
addEventListener("addtrack", (event) => { })

onaddtrack = (event) => { }

Event type

A TrackEvent. Inherits from Event.

EventTrackEvent

Examples

Using addEventListener():

js
const videoElement = document.querySelector("video");

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

Using the onaddtrack event handler property:

js
const videoElement = document.querySelector("video");

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

Specifications

See also