If needed, you can determine whether or not this constraint is supported by checking
the value of
MediaTrackSupportedConstraints.width as returned by a call
MediaDevices.getSupportedConstraints(). However, typically this is
unnecessary since browsers will ignore any constraints they're unfamiliar with.
If this value is a number, the user agent will attempt to obtain media whose width is
as close as possible to this number given the capabilities of the hardware and the other
constraints specified. Otherwise, the value of this
guide the user agent in its efforts to provide an exact match to the required width (if
exact is specified or both
provided and have the same value) or to a best-possible value.
See the Constraint exerciser example.
|Media Capture and Streams |
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