Mandatory setters

components.test-setters.js

import Ember from 'ember';

export default Ember.Component.extend({
  
  init() {
    this._super(...arguments);
    let foo = { bar: [1, 2, 3, 4] };
    
   	this.set('foo', foo);
    
    setTimeout(() => {
      foo.bar = [11, 22, 33, 44];
    }, 5000);
  }
  
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle'
});

templates.application.hbs

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

{{test-setters}}

templates.components.test-setters.hbs

{{#each foo.bar as |val index|}}
	<p><strong>{{index}}</strong> - {{val}}</p>
{{/each}}
	

twiddle.json

{
  "version": "0.10.6",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.7.3",
    "ember-data": "2.9.0",
    "ember-template-compiler": "2.7.3",
    "ember-testing": "2.7.3"
  },
  "addons": {}
}