The MediaTrackSupportedConstraints
dictionary's height
property is a read-only Boolean value which is present (and set to true
) in the object returned by MediaDevices.getSupportedConstraints()
if and only if the user agent supports the height
constraint. If the constraint isn't supported, it's not included in the list, so this value will never be false
.
You can access the supported constraints dictionary by calling navigator.mediaDevices.getSupportedConstraints()
.