Deprecated: This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.

The byteStreamTrackID read-only property of the TrackDefault interface returns the ID of the specific track that the SourceBuffer should apply to.

If not specified in the constructor, this value will be an empty string and the SourceBuffer can contain any tracks of the specified TrackDefault.type.


var myID = TrackDefault.byteStreamTrackID;


A DOMString.



Browser compatibility

BCD tables only load in the browser

See also