The clone() method of the MediaStreamTrack interface creates a duplicate of the MediaStreamTrack. This new MediaStreamTrack object is identical except for its unique id. 
 The clone() method of the MediaStreamTrack interface creates a duplicate of the MediaStreamTrack. This new MediaStreamTrack object is identical except for its unique id. 
js
clone()
None.
 A new MediaStreamTrack instance which is identical to the one clone() was called, except for its new unique id. 
| Specification | 
|---|
| Media Capture and Streams  # dom-mediastreamtrack-clone  | 
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
clone | 
35 | 12 | 48 | No | 22 | 11 | 37 | 35 | 48 | 22 | 11 | 3.0 | 
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    https://developer.mozilla.org/en-US/docs/Web/API/MediaStreamTrack/clone