5.7 RTCTrackEvent

5.7 RTCTrackEvent

track事件使用RTCTrackEvent接口。

        [ Constructor (DOMString type, RTCTrackEventInit eventInitDict), Exposed=Window]
interface RTCTrackEvent : Event {
    readonly        attribute RTCRtpReceiver           receiver;
    readonly        attribute MediaStreamTrack         track;
    [SameObject]
    readonly        attribute FrozenArray<MediaStream> streams;
    readonly        attribute RTCRtpTransceiver        transceiver;
};

构造函数

RTCTrackEvent(https://github.com/web-platform-tests/wpt/blob/master/webrtc/RTCTrackEvent-constructor.html)

属性

RTCRtpReceiver类型的receiver，只读：receiver属性表示与事件关联的RTCRtpReceiver对象。

MediaStreamTrack类型的track，只读：track属性表示与RTCRtpReceiver关联的由receiver验证的MediaStreamTrack对象。

FrozenArray<MediaStream>类型的streams,只读：streams属性返回MediaStream对象的数组，表示此事件的track是MediaStreams的一部分。

RTCRtpTransceiver类型的transceiver，只读：transceiver属性表示与此事件关联的RTCRtpTransceiver对象。

dictionary RTCTrackEventInit : EventInit {
    required RTCRtpReceiver        receiver;
    required MediaStreamTrack      track;
             sequence<MediaStream> streams = [];
    required RTCRtpTransceiver     transceiver;
};

字典RTCTrackEventInit成员

RTCRtpReceiver类型的receiver

MediaStreamTrack类型的track

sequence<MediaStream>类型的streams

RTCRtpTransceiver类型的transceiver