New Twiddle

components.ember-iframe.js

import Ember from 'ember';
export default Ember.Component.extend({
	tagName: 'iframe',
  attributeBindings: ['sandbox','src'],
  src: Ember.computed(function(){
    return '';
  }),
  sandbox: 'allow-scripts allow-same-origin allow-popups allow-top-navigation allow-forms',
  didRender() {
    const doc = this.$()[0].contentDocument || this.$()[0].contentWindow.document;
   	doc.body.innerHTML = '<div>kek</div>';
  }
});

controllers.application.js

import Ember from 'ember';

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

templates.application.hbs

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


{{#ember-iframe}}
hello
{{/ember-iframe}}
<br>
<br>

templates.components.ember-iframe.hbs

{{yield}}

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"
  }
}