New Twiddle

application.controller.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
model: [],
 init() {
 this._super(...arguments);
Ember.run.later(this,() => {
	this.get('model').pushObject({a:1});
 }, 3000);
 }
});

application.template.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{outlet}}
{{my-comp model=model}}
<br>
<br>

my-comp.component.js

import Ember from 'ember';

export default Ember.Component.extend({
	didReceiveAttrs() {
	this._super(...arguments);
  console.log('receive', arguments.newAttrs.model.value.length);
  },
	didUpdateAttrs() {
	this._super(...arguments);
  console.log('update', arguments.newAttrs.model.value.length);
  },
willUpdate() {
this._super(...arguments);
console.log(this.get('model.length'));
},
didUpdate() {
	this._super(...arguments);
  console.log(this.get('model.length'));
},
didRender() {
	this._super(...arguments);
  console.log(this.get('model.length'));
},
	contentChange: Ember.observer('model.[]', function() {
	console.log('content change');
})
});

my-comp.template.hbs

{{model.length}}
{{name}}
{{yield}}

twiddle.json

{
  "version": "0.6.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.3.1/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/2.3.3/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.2.0/ember-template-compiler.js"
  }
}