The HTML DOM Track kind property sets/returns the value of kind attribute of track element to specify the type of text track.
Following is the syntax −
Returning string value
trackObject.kind
Setting kind to stringValue
trackObject.kind = stringValue
Here, “stringValue” can be the following −
| stringValue | Details |
|---|---|
| captions | The captions are translationof dialogue and sound effects (preferable for deaf users) |
| chapters | It defines the chaptertitles (used for navigating the media resource) |
| descriptions | It defines a textualdescription of the video content (preferable for blind users) |
| metadata | It is not visible to theuser and content is used by scripts |
| subtitles | It is used to displaysubtitles in a video |
Let us see an example of Track kind property −
Example
<!DOCTYPE html>
<html>
<head>
<title>Track kind</title>
<style>
form {
width:70%;
margin: 0 auto;
text-align: center;
}
* {
padding: 2px;
margin:5px;
}
input[type="button"] {
border-radius: 10px;
}
</style>
</head>
<body>
<form>
<fieldset>
<legend>Track-kind</legend>
<video id="videoSelect" controls width="250" src="sample.mp4">
<track default kind="subtitles" srclang="es" src="sample-es.srt"/>
<track kind="subtitles" srclang="en" src="sample-en.srt"/>
</video><br>
<input type="button" onclick="getTrackDetails()" value="What is the kind of default track?">
<div id="divDisplay"></div>
</fieldset>
</form>
<script>
var divDisplay = document.getElementById("divDisplay");
var trackSelect = document.getElementsByTagName("track");
function getTrackDetails() {
for(var i=0; i<trackSelect.length; i++)
if(trackSelect[i].default)
divDisplay.textContent = 'kind of track for video: '+trackSelect[i].kind;
}
</script>
</body>
</html>Output
Before clicking ‘What is the kind of default track?’ button −
After clicking ‘What is the kind of default track?’ button −
