<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Chat Room</title>
</head>
<body>
<ul id="messages"></ul>
<form action="">
    <input id="m" autocomplete="off" /><button>Send</button>
</form>
<form id="fileUploadForm" action="/upload" method="post" enctype="multipart/form-data">
    <input type="file" name="file" />
    <button type="submit">Upload File</button>
</form>
<script src="/socket.io/socket.io.js"></script>
<script>
  var socket = io();

  document.querySelector('form').addEventListener('submit', function() {
    var input = document.getElementById('m');
    socket.emit('chat message', input.value);
    input.value = '';
    return false;
  });

  socket.on('chat message', function(msg) {
    var item = document.createElement('li');
    item.textContent = msg;
    document.getElementById('messages').appendChild(item);
  });

  socket.on('file', function(filename) {
    var item = document.createElement('li');
    item.textContent = 'File uploaded: ' + filename;
    document.getElementById('messages').appendChild(item);
  });
</script>
</body>
</html>