The MediaTrackSupportedConstraints
dictionary's logicalSurface
property indicates whether or not the logicalSurface
constraint is supported by the user agent and the device on which the content is being used.
The supported constraints list is obtained by calling navigator.mediaDevices.getSupportedConstraints()
.
Syntax
isLogicalSurfaceSupported = supportedConstraints.logicalSurface;
Value
A Boolean value which is true
if the logicalSurface
constraint is supported by the device and user agent.
Example
This method sets up the constraints object specifying the options for the call to getDisplayMedia()
. It adds the logicalSurface
constraint (requesting that only logical display surfaces—those which may not be entirely visible onscreen—be included among the options available to the user) only if it is known to be supported by the browser. Capturing is then started by calling getDisplayMedia()
and attaching the returned stream to the video element referenced by the variable videoElem
.
async function capture() { let supportedConstraints = navigator.mediaDevices.getSupportedConstraints(); let displayMediaOptions = { video: { }, audio: false; }; if (supportedConstraints.logicalSurface) { displayMediaOptions.video.logicalSurface = "monitor"; } try { videoElem.srcObject = await navigator.mediaDevices.getDisplayMedia(displayMediaOptions); } catch(err) { /* handle the error */ } }
Specifications
Specification | Status | Comment |
---|---|---|
Screen Capture The definition of 'MediaTrackSupportedConstraints.logicalSurface' in that specification. |
Working Draft | Initial definition |
Browser compatibility
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
logicalSurface | Chrome No support No | Edge No support No | Firefox No support No | IE No support No | Opera Full support Yes | Safari ? | WebView Android No support No | Chrome Android No support No | Firefox Android No support No | Opera Android ? | Safari iOS ? | Samsung Internet Android No support No |
Legend
- Full support
- Full support
- No support
- No support
- Compatibility unknown
- Compatibility unknown