VideoTrackList: change event

The change event is fired when a video track is made active or inactive, for example by changing the track's selected property.

Syntax

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

addEventListener("change", (event) => {});

onchange = (event) => {};

Event type

A generic Event with no added properties.

Examples

Using addEventListener():

const videoElement = document.querySelector("video");
videoElement.videoTracks.addEventListener("change", (event) => {
  console.log(`'${event.type}' event fired`);
});

// changing the value of `selected` will trigger the `change` event
const toggleTrackButton = document.querySelector(".toggle-track");
toggleTrackButton.addEventListener("click", () => {
  const track = videoElement.videoTracks[0];
  track.selected = !track.selected;
});

Using the onchange event handler property:

const videoElement = document.querySelector("video");
videoElement.videoTracks.onchange = (event) => {
  console.log(`'${event.type}' event fired`);
};

// changing the value of `selected` will trigger the `change` event
const toggleTrackButton = document.querySelector(".toggle-track");
toggleTrackButton.addEventListener("click", () => {
  const track = videoElement.videoTracks[0];
  track.selected = !track.selected;
});

Specifications

Specification
HTML Standard # event-media-change
HTML Standard # handler-tracklist-onchange

Browser compatibility

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	WebView Android	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet
`change_event`	37	7912–79	33	10	24	7	No	37	No	No	7	No

Docs

Docs4dev

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