The Controller module of a simple MVC implementation, in ES6 and module pattern

simpleMVC.Controller.js

/**
 * Controller module
 */
var simpleMVC = (function simpleMVC(simple) {
  'use strict';

  simple.Controller = function SimpleController(model, view) {

    this._model = model;
    this._view = view;

    if (this._view.hasOwnProperty('onChanged')) {
      this._view.onChanged.attach(
        (sender, data) => this.update(data)
      );
    }
  };

  simple.Controller.prototype = {
    update(data) {
      this._model.set(data);
    },
  };

  return simple;
})(simpleMVC || {});