Test Values in prototype

controllers.application.js

import Ember from 'ember';

var MyObj = Ember.Object.extend({
	obj: Ember.computed({
  	get() {
      var Obj = class Obj {
        shrinkValues() {
         	Object.keys(this).forEach(key => {
          	if(this[key] === Obj.prototype[key]) {
            	delete this[key];
            }
          });
        }
      };

      Obj.prototype.prop1 = 'default1';
      Obj.prototype.prop2 = 'default2';
      Obj.prototype.prop3 = 'default3';
      Obj.prototype.prop4 = 'default4';
      
      return new Obj()
    }
  }).readOnly()
});


export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  init() {
    this._super();
  	this.myObj = MyObj.create();
    this.myObj.obj.prop1 = 1;
    Ember.set(this.myObj, 'obj.prop2', 2);
    Ember.set(this, 'myObj.obj.prop3', 3);
    console.log('this.myObj.obj.prop1', this.myObj.obj.prop1);
    console.log('this.myObj.obj.prop2', this.myObj.obj.prop2);
    console.log('this.myObj.obj.prop3', this.myObj.obj.prop3);
    console.log('this.myObj.obj.prop4', this.myObj.obj.prop4);
    console.log('this.myObj.obj', this.myObj.obj);
    Ember.set(this.myObj, 'obj.prop2', 'default2');
    this.myObj.obj.shrinkValues();
    console.log('this.myObj.obj.prop1', this.myObj.obj.prop1);
    console.log('this.myObj.obj.prop2', this.myObj.obj.prop2);
    console.log('this.myObj.obj.prop3', this.myObj.obj.prop3);
    console.log('this.myObj.obj.prop4', this.myObj.obj.prop4);
    console.log('this.myObj.obj', this.myObj.obj);
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{outlet}}
<br>
<br>

<div>
	<label>myObj.obj:</label> {{myObj.obj.prop1}}
</div>

twiddle.json

{
  "version": "0.15.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.2.2",
    "ember-template-compiler": "3.2.2",
    "ember-testing": "3.2.2"
  },
  "addons": {
    "ember-data": "3.2.0"
  }
}