New Twiddle

components.my-component.js

import Ember from 'ember';

export default Ember.Component.extend({
  someValue: 0,
  otherValue: 0,
  
  computedValue: Ember.computed('otherValue', function() {
    return this.get('someValue') + this.get('otherValue');
  }),
  
  actions: {
    clickFirst() {
      this.incrementProperty('someValue');
    },
    
    clickSecond() {
      this.incrementProperty('otherValue');
    }
  }
});

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

templates.components.my-component.hbs

{{yield}}
<br/>
someValue + otherValue = {{computedValue}}
<br/>
<button {{action "clickFirst"}}>Increment someValue</button>
<button {{action "clickSecond"}}>Increment otherValue</button>

twiddle.json

{
  "version": "0.10.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.6.0",
    "ember-data": "2.6.1",
    "ember-template-compiler": "2.6.0"
  },
  "addons": {}
}