New Twiddle

components.my-component.js

import Ember from 'ember';

const STATE = {
  props: {
    prop: true,
  },
};

export default Ember.Component.extend({
  init() {
    this._super();
    this.set('componentState', STATE.props);
  },
  
  actions: {
		doStuff() {
      this.toggleProperty('componentState.prop')
  		alert(STATE.props.prop);
		}
	}
});

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}}
{{my-component}}
<br>
<br>

templates.components.my-component.hbs

{{yield}}
<button {{action "doStuff"}}>click me</button>

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"
  }
}