The MediaStreamTrackEvent() constructor returns a newly created MediaStreamTrackEvent object, which represents an event announcing that a MediaStreamTrack has been added to or removed from a MediaStream.
var trackEvent = new MediaStreamTrackEvent(type, {track: aMediaStreamTrack});
The MediaStreamTrackEvent() constructor also inherits arguments from Event().
typeDOMString representing the name of the type of the MediaStreamTrackEvent. It is case-sensitive and can be "addtrack" or "removetrack".trackMediaStreamTrack object representing the track which was added to or removed from the stream.A new MediaStreamTrackEvent, initialized based on the provided options.
| Specification | Status | Comment |
|---|---|---|
| Media Capture and Streams The definition of 'MediaStreamTrackEvent()' in that specification. | Editor's Draft |
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|
| Basic support | 55.0 | 50 (50) | No support | 42 | ? |
| Feature | Android | Android Webview | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile | Chrome for Android |
|---|---|---|---|---|---|---|---|
| Basic support | ? | (Yes) | 50.0 (50) | No support | 42 | ? | 55.0 |
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https://developer.mozilla.org/en-US/docs/Web/API/MediaStreamTrackEvent/MediaStreamTrackEvent