chromium/src/third_party/blink/renderer/core/html/track/track_event_init.idl

// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// https://html.spec.whatwg.org/C/#the-trackevent-interface

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