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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.

js

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

onchange = (event) => {};

Event type

A generic Event with no added properties.

Examples

Using addEventListener():

js

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:

js

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

See also

© 2005–2023 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/VideoTrackList/change_event