feature-remoteid/RemoteIDModule/web/uploader.html

<script src='js/jquery.min.js'></script>
<form method='POST' action='#' enctype='multipart/form-data' id='upload_form'>
  <input type='file' name='update'>
  <input type='submit' value='Update'>
</form>
<div id='prg'>upload progress: 0%</div>
<script>
  $('form').submit(function(e) {
      e.preventDefault();
      var form = $('#upload_form')[0];
      var data = new FormData(form);
      $.ajax({
          url: '/update',
          type: 'POST',
          data: data,
          contentType: false,
          processData:false,
          xhr: function() {
              var xhr = new window.XMLHttpRequest();
              xhr.upload.addEventListener('progress', function(evt) {
                  if (evt.lengthComputable) {
                      var per = evt.loaded / evt.total;
                      $('#prg').html('progress: ' + Math.round(per*100) + '%');
                  }
              }, false);
              return xhr;
          },
          success:function(d, s) {
              console.log('success!')
          },
          error: function (a, b, c) {
          }
      });
  });
</script>