MediaTrackSupportedConstraints.displaySurface
The MediaTrackSupportedConstraints
dictionary's
displaySurface
property indicates whether or not the
displaySurface
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()
.
Value
A Boolean value which is true
if the
displaySurface
constraint is
supported by the device and user agent.
Examples
This method sets up the constraints object specifying the options for the call to
getDisplayMedia()
. It adds the
displaySurface
constraint (requesting that only fullscreen sharing be
allowed) 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.displaySurface) {
displayMediaOptions.video.displaySurface = "monitor";
}
try {
videoElem.srcObject = await navigator.mediaDevices.getDisplayMedia(displayMediaOptions);
} catch(err) {
/* handle the error */
}
}
Specifications
Specification |
---|
Screen Capture # dom-mediatracksupportedconstraints-displaysurface |
Browser compatibility
BCD tables only load in the browser