TextTrackList: change event - Web APIs 编辑

The change event is fired when a text track is made active or inactive, or a textTrackList is otherwise changed.

Examples

Using addEventListener():

const mediaElement = document.querySelectorAll('video, audio')[0];
mediaElement.textTracks.addEventListener('change', (event) => {
    console.log(`'${event.type}' event fired`);
});

Using the onchange event handler property:

const mediaElement = document.querySelector('video, audio');
mediaElement.textTracks.onchange = (event) => {
    console.log(`'${event.type}' event fired`);
};

Specifications

Browser compatibility

BCD tables only load in the browser

See also

• Related events: addtrack, removetrack
• This event on VideoTrackList targets: change
• This event on AudioTrackList targets: change
• Media Streams API
• WebRTC