// https://w3c.github.io/mediacapture-main/#mediastream
[Exposed=Window]
interface MediaStream : EventTarget {
    constructor(optional sequence<MediaStreamTrack> tracks = []);
    readonly attribute DOMString id;
    sequence<MediaStreamTrack> getAudioTracks();
    sequence<MediaStreamTrack> getVideoTracks();
    sequence<MediaStreamTrack> getTracks();
    MediaStreamTrack? getTrackById(DOMString trackId);
    undefined addTrack(MediaStreamTrack track);
    undefined removeTrack(MediaStreamTrack track);
    MediaStream clone();
    readonly attribute boolean active;
    attribute EventHandler onaddtrack;
    attribute EventHandler onremovetrack;
};
