Plugin Countdown

<link href="https://unpkg.com/grapesjs/dist/css/grapes.min.css" rel="stylesheet"/>
<script src="https://unpkg.com/grapesjs"></script>
<script src="path/to/grapesjs-component-countdown.min.js"></script>

<div id="gjs"></div>

<script type="text/javascript">
  var editor = grapesjs.init({
      container : '#gjs',
      // ...
      plugins: ['grapesjs-component-countdown'],
      pluginsOpts: {
        'grapesjs-component-countdown': { /* options */ }
      }
  });
</script>