function startScreenShare() {
        if (screenSharing) {
            stopScreenSharing()
        }
        navigator.mediaDevices.getDisplayMedia(
            { video: { mediaSource: "screen" }, audio: true }
        ).then((stream) => {
            setScreenSharingStream(stream);
    
            screenStream = stream;
            let videoTrack = screenStream.getAudioTracks()[0];
            videoTrack.onended = () => {
                stopScreenSharing()
            }
            if (peer) {
                let sender = currentPeer.peerConnection.getSenders().find(function (s) {
                    return s.track.kind == videoTrack.kind;
                })
                sender.replaceTrack(videoTrack)
                screenSharing = true
            }
            console.log(screenStream)
        })
    }