New Twiddle

controllers.application.js

import Ember from 'ember';

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

helpers.my-helper.js

import Helper from 'ember-helper';
import service from 'ember-service/inject';
import run from 'ember-runloop';
import observer from 'ember-metal/observer';


let i=0;
export default Helper.extend({
	init() {
    this._super(...arguments);
    setInterval(() => run(() => { this.recompute() }), 1000);
  },
  
  compute(/*[key], hash = {}*/) {
    console.log('COMPUTING');
    return "woop " + (i++);
  }
});

templates.application.hbs

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

twiddle.json

{
  "version": "0.12.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.12.0",
    "ember-template-compiler": "2.12.0",
    "ember-testing": "2.12.0"
  },
  "addons": {
    "ember-data": "2.12.1"
  }
}