melody/examples/filewatch/index.html

<html>
  <head>
    <title>Melody example: file watching</title>
  </head>

  <style>
    #file {
      text-align: left;
      background: #f1f1f1;
      width: 500px;
      min-height: 300px;
      padding: 20px;
    }
  </style>

  <body>
    <center>
      <h3>Watching a file</h3>
      <pre id="file"></pre>
    </center>

    <script>
      var url = 'ws://' + window.location.host + '/ws';
      var c = new WebSocket(url);

      c.onmessage = function(msg){
        var el = document.getElementById("file");
        el.innerText = msg.data;
      }
    </script>
  </body>
</html>