This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
The enter event fires when a cue becomes active. In the case of subtitles or a caption this is when it displays over the media.
Use the event name in methods like addEventListener(), or set an event handler property.
addEventListener("enter", (event) => { })
onenter = (event) => { }
A generic Event with no added properties.
In the following example, cue prints to the console when it is the active cue.
cue.addEventListener("enter", (event) => {
console.log("Cue 1 has displayed");
});
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Opera | Safari | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | WebView Android | WebView on iOS | |
enter_event |
23 | 12 | 31 | ≤12.1 | 6 | 25 | 31 | ≤12.1 | 7 | 1.5 | 4.4 | 7 |
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https://developer.mozilla.org/en-US/docs/Web/API/TextTrackCue/enter_event