New Twiddle

controllers.application.js

import Ember from 'ember';
import fetch from 'fetch';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  noDnsFailed: null,
  noDnsFailedRealFetch: null,
  SSLFailed: null,
  SSLFailedRealFetch: null,
  
  init(){
    this._super(...arguments);
    
    fetch('http://asdsadsadasdasdasdasdsadasdasdasdasd.xyas').then(
      ()=>{this.set('noDnsFailed', false)},
      ()=>{this.set('noDnsFailed', true)});
    
    fetch('https://untrusted-root.badssl.com/').then(
      ()=>{this.set('SSLFailed', false)},
      ()=>{this.set('SSLFailed', true)});
    
    window.fetch('http://asdsadsadasdasdasdasdsadasdasdasdasd.xyas').then(
      ()=>{Ember.run.next(()=>this.set('noDnsFailedRealFetch', false))},
      ()=>{Ember.run.next(()=>this.set('noDnsFailedRealFetch', true))});
    
    window.fetch('https://untrusted-root.badssl.com/').then(
      ()=>{Ember.run.next(()=>this.set('SSLFailedRealFetch', false))},
      ()=>{Ember.run.next(()=>this.set('SSLFailedRealFetch', true))});
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
Failures:
<br>
DNS pollyfill: {{noDnsFailed}}<br>
DNS fetch: {{noDnsFailedRealFetch}}<br>
SSL pollyfill: {{SSLFailed}}<br>
SSL fetch: {{SSLFailedRealFetch}}
<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-fetch": "2.1.0"
  }
}