New Twiddle

components.my-component.js

import Ember from 'ember';

export default Ember.Component.extend({
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  init(){
    this._super(...arguments);
  },
  appName: 'Ember Twiddle',
  counter: 0,
  showMessage: true,
  actions:{
    popup(val){
      this.set('counter',this.get('counter')+val);
    }
  }
});

templates.application.hbs

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

<br>
{{my-component popup=(action 'popup')}}

templates.components.my-component.hbs

<h3>My Component</h3>

<button {{action popup 21}}>Press Me</button>

twiddle.json

{
  "version": "0.11.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.11.0",
    "ember-data": "2.11.0",
    "ember-template-compiler": "2.11.0",
    "ember-testing": "2.11.0"
  },
  "addons": {}
}