title: javascript getUserMedia get media stream time
body: <p>How can I obtain a current stream time of the stream object in javascript ?</p>
  
  <p><code>navigator.mediaDevices.getUserMedia(constraints)
    .then(function(stream) {
        console.log("get stream time here")
  })</code></p>
  
  <p>Is there any possible way to get stream time ??</p>