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This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The TrackDefault() getter method of the TrackDefaultList interface allows the TrackDefault objects in the list to be accessed with an array operator (i.e. [].)


var myTrackDefault = TrackDefaultList[index];


The index position of the TrackDefault object you want to return.


A TrackDefault object.


No specific errors are returned, but if the supplied index is great than or equal to TrackDefaultList.length, the operation will return undefined.




Specification Status Comment
Media Source Extensions
The definition of 'TrackDefault() getter' in that specification.
Recommendation Initial definition.

Browser compatibility

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!

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support ? No support ? ? ?
Feature Android Firefox Mobile (Gecko) Firefox OS (Gecko) IE Phone Opera Mobile Safari Mobile
Basic support ?

No support

No support ? ? No support

See also

Document Tags and Contributors

 Contributors to this page: chrisdavidmills
 Last updated by: chrisdavidmills,