Property example

propertyexample.js

App.ExampleController = Em.Controller.extend({ 
  needs: ['user'],
 
  userController: (function() {
    return this.controllerFor('user');
  }).property(),
  
  username: (function() {
    return this.get('userController.username') + ' Funkypants!';
  }).property('userController.username')
});