Can this be created in javascript. A timer?

JavaScript
49 
    <img id="myTimer" src='data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxNCIgaGVpZ2h0PSIxOCIgdmlld0JveD0iMCAwIDEyMjYgMTQ4MSI+CiAgPHBhdGggZD0iTTAgMTM5NFY4N0MwIDQ2LjMgMTMuMyAxOS44IDQwIDcuNSA2Ni43LTQuOCA5OC43LjMgMTM2IDIzbDEwMzQgNjM0YzM3LjMgMjIuNyA1NiA1MC4zIDU2IDgzcy0xOC43IDYwLjMtNTYgODNMMTM2IDE0NThjLTM3LjMgMjIuNy02OS4zIDI3LjgtOTYgMTUuNS0yNi43LTEyLjMtNDAtMzguOC00MC03OS41eiIgZmlsbD0iIzAwNTlkZCIvPgogPC9zdmc+'>
<script>

  var image = document.getElementById('myTimer');
  image.addEventListener("load", listener, false);

  function listener() {
     console.timeEnd('Timer1');
  }
</script>