Definition
HTML Standard defines HTMLTrackElement
[Exposed=Window]
interface HTMLTrackElement : HTMLElement {
[HTMLConstructor] constructor();
[CEReactions] attribute DOMString kind;
[CEReactions] attribute USVString src;
[CEReactions] attribute DOMString srclang;
[CEReactions] attribute DOMString label;
[CEReactions] attribute boolean default;
const unsigned short NONE = 0;
const unsigned short LOADING = 1;
const unsigned short LOADED = 2;
const unsigned short ERROR = 3;
readonly attribute unsigned short readyState;
readonly attribute TextTrack track;
};