HTML <track> default Attribute

HTML track Tag Reference HTML <track> tag


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">

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.

default 18.0 10.0 Not supported Not supported 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" />.


<track src="subtitles_en.vtt" default>

HTML track Tag Reference HTML <track> tag


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