HTMLMediaElement.audioTracks - Web API 接口参考 编辑

 HTMLMediaElement.audioTracks 获得可用音频轨道的数量

语法

audio|video.audioTracks

返回值

AudioTrackList    对象 表示音频/视频的可用音频轨道

用例

以audio标签为例

<audio id='audio'></audio>

调用

myVid=document.getElementById("audio");
alert(myVid.audioTracks.length);

参考文档

Specification	Status	Comment
HTML Living Standard HTMLMediaElement.audioTracks	Living Standard	No change from HTML5
HTML5 HTMLMediaElement.audioTracks	Recommendation	Initial definition.

浏览器支持

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!

• Desktop
• Mobile

Feature	Chrome	Firefox (Gecko)	Internet Explorer	Opera	Safari
audioTracks property	?	33.0 (33.0)[5]	?	?	?

Feature	Android	Firefox Mobile (Gecko)	Firefox OS (Gecko)	IE Mobile	Opera Mobile	Safari Mobile
audioTracks property	?	33.0 (33.0)[5]	(Yes)	?	?	?

还可以看看

• 定义它的接口, HTMLMediaElement.