counter.html

<!DOCTYPE html>

<html>

<head>

   <title>Node JS - Get Real time online users counter using socket io</title>

   <script type="text/javascript" src="https://code.jquery.com/jquery-1.4.2.min.js"></script>

   <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/1.7.3/socket.io.min.js"></script>

</head>

<body>



<h1>Counter : <span id="counter"></span></h1>



<script type="text/javascript">



  var socket = io.connect('http://localhost:5000');



  socket.on('counter', function (data) {

    $("#counter").text(data.count);

  });



</script>



</body>

</html>