gistfile1.html

<script src="/socket.io/socket.io.js"></script>
<script src="/lib/q.js"></script>
<script>
  var socket = io.connect('http://localhost');
</script>

// ...

<script>
var model = new SocketModel();
model.sync = function (method, model, options) {
  var dfd = Q.defer();
  socket.emit(method + _.result(model, 'url'), data, dfd.resolve, dfd.reject);
  return dfd.promise.then(options.success, options.error);
};
</script>