New Twiddle

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  bar: {
    name: 'cached'
  },
  
  proxy: Ember.computed('bar', function () {
    const proxy = new Ember.ObjectProxy({
      content: {
        name: 'persisted',
        nested: {
        	text: 'nested-persisted'
      	}
      }
    })
    
    proxy.setProperties(this.get('bar'))
    
    return proxy
  }),
  
  actions: {
    on () {
      this.set('bar', {
         name: 'cached',
         nested: {
           text: 'nested-cached'
         },
         deeply: {
           deeply: {
             deeply: {
               nested: {
                 value: 'so-deep-cached'
               }
             }
           }
         },
         some: {
           array: [1, 2, 3]
         }
      })
    },
    
    off () {
      this.set('bar', {})
    }
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{proxy.name}}
<br>
{{proxy.nested.text}}
<br>
{{proxy.deeply.deeply.deeply.nested.value}}
<br>
{{#each proxy.some.array as |value|}}
  {{value}}
{{/each}}
<br>
<button {{action 'on'}}>On</button>
<button {{action 'off'}}>Off</button>
{{outlet}}
<br>
<br>

twiddle.json

{
  "version": "0.13.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.16.2",
    "ember-template-compiler": "2.16.2",
    "ember-testing": "2.16.2"
  },
  "addons": {
    "ember-data": "2.16.3"
  }
}