Simple example of using spin.js (http://fgnass.github.io/spin.js) from Felix Gnass

tutorial_27_example_1.html

  <style>
    .spinner {
      position: fixed;
      top: 50%;
      left: 50%;
    }
  </style>

  <script src="/javascripts/spin.js"></script>
  <script>
    var opts = {
      lines: 11, // The number of lines to draw
      length: 15, // The length of each line
      width: 10, // The line thickness
      radius: 30, // The radius of the inner circle
      corners: 1, // Corner roundness (0..1)
      rotate: 0, // The rotation offset
      direction: 1, // 1: clockwise, -1: counterclockwise
      color: '#000', // #rgb or #rrggbb
      speed: 0.6, // Rounds per second
      trail: 60, // Afterglow percentage
      shadow: false, // Whether to render a shadow
      hwaccel: false, // Whether to use hardware acceleration
      className: 'spinner', // The CSS class to assign to the spinner
      zIndex: 2e9, // The z-index (defaults to 2000000000)
      top: 'auto', // Top position relative to parent in px
      left: 'auto' // Left position relative to parent in px
    };

    var spinner = null;
    var spinner_div = 0;

    $(document).ready(function() {

      spinner_div = $('#spinner').get(0);

      $("#button1").on('click', function(e) {
        e.preventDefault();
        if(spinner == null) {
          spinner = new Spinner(opts).spin(spinner_div);
        } else {
          spinner.spin(spinner_div);
        }
      });

      $("#button2").on('click', function(e) {
        e.preventDefault();
        spinner.stop(spinner_div);
      });

    });
  </script>

  <p style='text-align: center;'>
  <input type="button" id="button1" value="START">
  &nbsp;
  <input type="button" id="button2" value="STOP">
  </p>

  <div id='spinner' class='spinner'></div>