session_controller.js

SessionsController = function() {
  function SessionsController() {
    this.x = 1;
  }
  SessionsController.prototype.init = function(req, res, next) {
    return console.log(this);
  };
  return SessionsController;
}();

// In my express app:
sessionsController = new SessionsController()
sessionsController.init() // console.log --> {x: 1}

// App Routes
app.all '/', sessionsController.init // on request, console.log --> { route: '', handle: [Function: router] }, where is X?