app.js

let publisher;
const handleError = (e) => console.log(e);
const startScreenShareWithAudio = async () => {
	let stream;
    try {
    	stream = await navigator.mediaDevices.getDisplayMedia({video: true, audio: true});
    } catch (e) {
        handleError(e);
	}
    if (stream) {
      publisher = OT.initPublisher({
        videoSource: stream.getVideoTracks()[0],
        audioSource: stream.getAudioTracks()[0]
	  }, handleError);
    }
};