how to record video using js code example

Example: javascript record video in browser

<input type="file" accept="video/*" capture="camera" id="recorder"><video id="player" controls></video><script>  var recorder = document.getElementById('recorder');  var player = document.getElementById('player');  recorder.addEventListener('change', function(e) {    var file = e.target.files[0];    // Do something with the video file.    player.src = URL.createObjectURL(file);  });</script>