<script src="RecordRTC/RecordRTC.js"></script><script src="part-of-screen-sharing/screenshot.js"></script><div id="elementToShare" style="width:50%;height:50%;background:green;"><input></input></div><button onclick="start()">start</button><button onclick="stop()">stop</button><script>var elementToShare = document.getElementById(‘elementToShare‘);var recorder = RecordRTC(elementToShare, {    type: ‘canvas‘});function start(){    recorder.startRecording();}function stop(){    recorder.stopRecording(function(url) {    window.open(url);});}</script>