source/bower_components/modernizr/feature-detects/elem-track.js


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// Track element + Timed Text Track API
// http://www.w3.org/TR/html5/video.html#the-track-element
// http://www.w3.org/TR/html5/media-elements.html#text-track-api
//
// While IE10 has implemented the track element, IE10 does not expose the underlying APIs to create timed text tracks by JS (really sad)
// By Addy Osmani
Modernizr.addTest({
	texttrackapi: (typeof (document.createElement('video').addTextTrack) === 'function'),
	// a more strict test for track including UI support: document.createElement('track').kind === 'subtitles'
	track: ('kind' in document.createElement('track'))
});