MediaTrackConstraints: width property
The MediaTrackConstraints dictionary's
width property is a ConstrainULong
describing the requested or mandatory constraints placed upon the value of the
width constrainable property.
If needed, you can determine whether or not this constraint is supported by checking
the value of MediaTrackSupportedConstraints.width as returned by a call
to MediaDevices.getSupportedConstraints(). However, typically this is
unnecessary since browsers will ignore any constraints they're unfamiliar with.
Value
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 ConstrainULong will
guide the user agent in its efforts to provide an exact match to the required width (if
exact is specified or both min and max are
provided and have the same value) or to a best-possible value.
Examples
See the Constraint exerciser example.
Specifications
| Specification |
|---|
| Media Capture and Streams # dom-mediatrackconstraintset-width |
Browser compatibility
BCD tables only load in the browser