getCapabilities() method of the
MediaStreamTrack interface returns a
MediaTrackCapabilities object which specifies the values or range of values which each constrianable property, based upon the platform and user agent.
Once you know what the browser's capabilities are, your script can use
applyConstraints() to ask for the track to be configured to match ideal or acceptable settings. See Capabilities and constraints in Media Capture and Streams API (Media Streams) for details on how to work with constrainable properties.
var capabilities = MediaStreamTrack.getCapabilities();
MediaTrackCapabilities object which specifies the value or range of values which are supported for each of the user agent's supported constrainable properties.
|Media Capture and Streams
The definition of 'getConstraints()' in that specification.
|Candidate Recommendation||Initial definition.|