An example of the old way of creating controllers.

ControllersTheOldWay.js

/*
 * This way of creating a controller has a few issue:
 * 1. It buries the namespace declaration at the bottom of the document.
 * 2. It creates an unnecessary abstraction of the namespace that may not be obvious to developers.
 * 3. It requires retyping the namespace in every single file.
 */
(function(exports) {
  var HelloWorld = function() {
    console.log('Hello, World!');
  }
  
  exports.HelloWorld = HelloWorld.
}(window.Site.Controllers));