We are implementing sharing screen with audio using Screen Capture API(getDisplayMedia) by using JavaScript. To get the requested screen we passed the below constraints in getDisplayMedia(constraints),

constraints = {
    audio: {
        echoCancellation: true,
        echoCancellationType: 'browser',
        autoGainControl: true,
        noiseSuppression: true
    },
    video: true
};

then we shared promised stream via webRTC,

Let's consider A and B users are there, A is sharing the screen and screen got shared to B via webRTC then user B is getting ECHO issue(while talking to user A),

Note: if user A share specific tab/window screen then ECHO is not there at user B(while talking to user A)

We are using getDisplayMedia(constraints) like below,

if (navigator.mediaDevices.getDisplayMedia) {
       navigator.mediaDevices.getDisplayMedia(constraints).then(function (stream) { /*adding stream to webRTC and sharing to user B*/ }, function (error) { /*handling errors*/ });
} else {
       navigator.getDisplayMedia(constraints).then(function (stream) { /*adding stream to webRTC and sharing to user B*/ },function (error) { /*handling errors*/ });
}

Any help would be appreciated. Thanks.