An addtrack is fired when the browser adds a track to a MediaStream (such as when a RTCPeerConnection is renegotiated or a stream being captured using HTMLMediaElement.captureStream() gets a new set of tracks because the media element being captured loaded a new source.
The addtrack event does not get fired when JavaScript code explicitly adds tracks to the stream (by calling addTrack()).
An event handler for this event can be added by setting the MediaStream.onaddtrack property, or by calling addEventListener() on the MediaStream which you want to monitor for track additions.
General info
- Specification
- Media Capture and Streams
The definition of 'addtrack' in that specification. - Interface
MediaStreamTrackEvent- Bubbles
- No
- Cancelable
- No
- Target
MediaStream- Default Action
- None
Properties
This event implements the properties of MediaStreamTrackEvent.
Methods
This event implements the methods of MediaStreamTrackEvent.
Related events
Specifications
| Specification | Status | Comment |
|---|---|---|
| Media Capture and Streams The definition of 'addtrack' in that specification. |
Editor's Draft |
Browser compatibility
| Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|---|
| Basic support | (Yes) | (Yes) | 50 (50) | No support | (Yes) | ? |
| Feature | Android | Chrome for Android | Edge | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|---|
| Basic support | ? | (Yes) | (Yes) | 50.0 (50) | No support | ? | ? |