gecko-dev/dom/webidl/TrackEvent.webidl

/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
 * You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * The origin of this IDL file is
 * http://www.whatwg.org/specs/web-apps/current-work/#trackevent
 */

[Exposed=Window]
interface TrackEvent : Event
{
  constructor(DOMString type, optional TrackEventInit eventInitDict = {});

  readonly attribute (VideoTrack or AudioTrack or TextTrack)? track;
};

dictionary TrackEventInit : EventInit
{
  (VideoTrack or AudioTrack or TextTrack)? track = null;
};