window.addEventListener('load', function() {
  var dom = Dom();
  var sort = Sort();
  var screen = Screen();
  var messaging = Messaging();
  var session = Session({messaging: messaging});
  var room = Room({dom: dom, messaging: messaging, session: session, sort: sort});
  var login = Login({dom: dom, messaging: messaging, room: room, screen: screen, session: session});

  messaging.start();
});