HTMLTrackElement:cuechange 事件

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

cuechange 事件在 TextTrack 更改当前显示提示(cue)时触发。此事件在 TextTrack 和显示它的 HTMLTrackElement(如果有的话)上触发。

语法

在像 addEventListener() 这样的方法中使用此事件名,或设置事件处理器属性。

js
addEventListener("cuechange", (event) => {});

oncuechange = (event) => {};

事件类型

没有添加属性的通用 Event

示例

每当当前呈现的 cue 更改时,由 track 属性指示的底层 TextTrack 会接收 cuechange 事件。即使轨道并未与媒体元素关联,也会发生。

如果轨道和媒体元素关联的,使用 <track> 元素作为 <audio><video> 的子元素,cuechange 事件也发送给 HTMLTrackElement

js
let textTrackElem = document.getElementById("texttrack");

textTrackElem.addEventListener("cuechange", (event) => {
  let cues = event.target.track.activeCues;
});

或者,你可以使用 oncuechange 事件处理器。

js
let textTrackElem = document.getElementById("texttrack");

textTrackElem.oncuechange = (event) => {
  let cues = event.target.track.activeCues;
};

规范

Specification
HTML
# event-media-cuechange
HTML
# handler-oncuechange

浏览器兼容性

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
cuechange event

Legend

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Full support
Full support
Partial support
Partial support
Has more compatibility info.

参见