VideoTrackList: selectedIndex property

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

The read-only VideoTrackList property selectedIndex returns the index of the currently selected track, if any, or -1 otherwise.

A number indicating the index of the currently selected track, if any, or -1 otherwise.

Specification
HTML Standard # dom-videotracklist-selectedindex-dev

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