The MediaStream() constructor returns a newly-created MediaStream, which serves as a collection of media tracks, each represented by a MediaStreamTrack object. If any parameters are given, the specified tracks are added to the new stream. Otherwise, the stream has no tracks.


newStream = new MediaStream();
newStream = new MediaStream(stream);
newStream = new MediaStream(tracks[]);


A different MediaStream object whose tracks are added to the newly-created stream automatically. The tracks are not removed from the original stream, so they're shared by the two streams.
An Array of MediaStreamTrack objects, one for each track to add to the stream.

Return value

A newly-created MediaStream object, either empty, or containing the tracks provided, if any.


Specification Status Comment
Media Capture and Streams
The definition of 'MediaStream' in that specification.
Candidate Recommendation Ā 

Browser compatibility

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ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
MediaStream() constructorChrome Full support 21Edge Full support ā‰¤18Firefox Full support 44IE No support NoOpera Full support 42Safari No support NoWebView Android Full support 37Chrome Android Full support 25Firefox Android Full support 42Opera Android No support NoSafari iOS No support NoSamsung Internet Android Full support 6.0


Full support Ā 
Full support
No support Ā 
No support

See also