MediaStream: addtrack event

The addtrack event is fired when a new MediaStreamTrack object has been added to a MediaStream.

Examples

Using addEventListener():

let stream = new MediaStream();

stream.addEventListener('addtrack', (event) => {
  console.log(`New ${event.track.kind} track added`);
});

Using the onaddtrack event handler property:

let stream = new MediaStream();

stream.onaddtrack = (event) => {
  console.log(`New ${event.track.kind} track added`);
};

Specification
Media Capture and Streams # event-mediastream-addtrack

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	WebView Android	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet
`addtrack_event`	Yes	12	50	No	No	Yes	Yes	Yes	50	No	Yes	Yes