In-browser Webcam Video

webcam.js

// Javascript
navigator.mediaDevices.getUserMedia({
    video: {
      width:     ...,
      height:    ...,
      frameRate: ...
    }
  }
).then(function(stream) {
  let video = document.querySelector('video');
  video.srcObject = stream;
  video.onloadedmetadata = function(e) {
    video.play();
  };
}).catch(function(err) {
  // deal with an error (such as no webcam)
});


video.addEventListener('play', function() {
  // trigger business logic
}, false);