HTML <track> default Attribute
Example
A video with two subtitle tracks. "English" subtitle is the default:
<video width="320" height="240" controls>
<source src="forrest_gump.mp4" type="video/mp4">
<source src="forrest_gump.ogg" type="video/ogg">
<track src="subtitles_en.vtt" kind="subtitles" srclang="en" label="English" default>
<track src="subtitles_no.vtt" kind="subtitles" srclang="no" label="Norwegian">
</video>
Definition and Usage
The default attribute is a boolean attribute.
When present, it specifies that the track is to be enabled if the user's preferences do not indicate that another track would be more appropriate.
Note: There must not be more than one track element with a default attribute per media element.
Browser Support
The numbers in the table specify the first browser version that fully supports the attribute.
| Attribute | |||||
|---|---|---|---|---|---|
| default | 18.0 | 10.0 | 31.0 | 6.0 | 15.0 |
Differences Between HTML 4.01 and HTML5
The <track> tag is new in HTML5.
Differences Between HTML and XHTML
In XHTML, attribute minimization is forbidden, and the default attribute must be defined as <track default="default" />.
Syntax
<track src="subtitles_en.vtt" default>
HTML <track> tag
