MediaTrackSupportedConstraints.cursor
The MediaTrackSupportedConstraints
dictionary's
cursor
property indicates whether or not the
cursor
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
cursor
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
cursor
constraint 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 captureWithCursor() {
let supportedConstraints = navigator.mediaDevices.getSupportedConstraints();
let displayMediaOptions = {
video: {
displaySurface: "browser"
},
audio: false
};
if (supportedConstraints.cursor) {
displayMediaOptions.video.cursor = "always";
}
try {
videoElem.srcObject = await navigator.mediaDevices.getDisplayMedia(displayMediaOptions);
} catch(err) {
/* handle the error */
}
}
Specifications
Specification |
---|
Screen Capture # dom-mediatracksupportedconstraints-cursor |
Browser compatibility
BCD tables only load in the browser