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- The default attribute is a Boolean attribute.
- The default attribute is used to set the specified <track> as default.
- If the default attribute present that the track will be selected as default while the video load.
Syntax for default attribute in HTML:
<track default>Difference between HTML 4.01 and HTML 5 for default Attribute:
HTML 4.01
- HTML 4 does not support <track> element.
HTML 5
- HTML 5 support <track> element.
Applies To:
| Element | Attribute |
|---|---|
| <track> | default |
Sample Coding for default Attribute in HTML:
Tryit<!DOCTYPE html>
<html>
<head>
<title>Wikitechy default attribute</title>
</head>
<body>
<h2>HTML default attribute with example.</h2>
<video width="350" height="300" controls>
<source src="hibiscus.mp4" type="video/mp4">
<track src="subtitles_sp.vtt" kind="subtitles" srclang="es"
label="Spanish">
<track src="subtitles_en.vtt" kind="subtitles" srclang="en"
label="English" default>
</video>
</body>
</html>Code Explanation for default Attribute in HTML:
- The <video> tag is used to embed the video file.
- The <source> tag is used to set the source file as “hisbiscus.mp4”.
- The <track> tag is used to include a Spanish subtitle file.
- The <track> tag is used to include an English subtitle file.
- default attribute is used to set the English subtitle as default.
Output for default Attribute in HTML:
- The output shows the subtitle in English which is specified default.
- User can change the subtitle by click the subtitle icon.
- User can select the subtitles from the list.
- If user select the Spanish subtitle that will be selected.
Browser Support for default Attribute in HTML:
 |
 |
 |
 |
 |
|---|---|---|---|---|
| 18.0 | 10.0 | 31.0 | 6.0 | 15.0 |