MediaTrackSupportedConstraints: width property
The MediaTrackSupportedConstraints
dictionary's
width
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 width
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()
.
Syntax
js
widthConstraintSupported = supportedConstraintsDictionary.width
Value
This property is present in the dictionary (and its value is always true
)
if the user agent supports the width
constraint. If the property isn't
present, this property is missing from the supported constraints dictionary, and you'll
get undefined
if you try to look at its value.
Example
js
const result = document.getElementById("result");
const supported = navigator.mediaDevices.getSupportedConstraints().width;
result.textContent = supported ? "Supported!" : "Not supported!";
Result
Specifications
Specification |
---|
Media Capture and Streams # dom-mediatracksupportedconstraints-width |
Browser compatibility
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