VDOM

application.controller.js

import Ember from 'ember';

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

application.template.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{my-component}}
<br>
<br>

my-component.component.js

import Ember from 'ember';

export default Ember.Component.extend({
  ticker: Ember.inject.service(),

  init: function() {  
     console.log(this.get('ticker'));
     this._super(...arguments);
  },
  myvar: Ember.computed('ticker.tick', function() {
    console.log('foo');
    return 'what';
  }),
});

my-component.template.hbs

<p> I AM A COMPONENT - {{myvar}}</p>

my-service.service.js

import Ember from 'ember';

export default Ember.Service.extend({
 
 
  init: function() {
    this.seconds = 0;
    Ember.run.later(this, this.giveMeATick, 1000);
  },

  giveMeATick: function() {
    this.set('tick', this.seconds);
    console.log('tick!');
    this.seconds += 1;
    Emberrun.later(this, this.giveMeATick, 1000);
  },
});

twiddle.json

{
  "version": "0.4.16",
  "EmberENV": {
    "FEATURES": {}
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.1.0",
    "ember-data": "2.1.0",
    "ember-template-compiler": "2.1.0"
  }
}