New Twiddle

controllers.application.js

import Ember from 'ember';

const { computed } = Ember;

class FakeProxy extends Ember.Object {
  constructor(target) {
    super({});
    this._target = target;
  }
  
  unknownProperty(path) {
    return this._target[path];
  }
}

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  data: FakeProxy.create({
    person: Ember.Object.create({ name: 'Chris' })
  }),
  getPersonGetName: computed(function() {
    return this.get('data.person').get('name');
  }),
  getPersonName: computed(function() {
    return this.get('data').get('person.name');
  }),
  getDataPersonName: computed(function() {
    return this.get('data.person.name');
  })
});

templates.application.hbs

<br>
via Path In Template: {{data.person.name}}<br>
via getPersonGetName: {{getPersonGetName}}<br>
via getPersonName: {{getPersonName}}<br>
via getDataPersonName: {{getDataPersonName}}<br>
<br>
{{outlet}}
<br>
<br>

twiddle.json

{
  "version": "0.15.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.4.3",
    "ember-template-compiler": "3.4.3",
    "ember-testing": "3.4.3"
  },
  "addons": {
    "ember-data": "3.4.2"
  }
}