New Twiddle

components.my-component.js

import Ember from 'ember';

export default Ember.Component.extend({
  init() {
    let date = new Date();
    this.set('myDate', date);
    this.set('myDate2', date);
    return this._super(...arguments);
  },
  dateComp: Ember.computed('myDate', function() {
    
  }),
  actions: {
  	add() {
      let result = new Date();
      result.setDate(result.getDate() + 1);
      this.set('myDate2', result);
    }
  }
});

controllers.application.js

import Ember from 'ember';

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

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
{{my-component}}
<br>
<br>
{{outlet}}
<br>
<br>

templates.components.my-component.hbs

First variable: {{myDate}}
<br>
Second variable: {{myDate2}}
<button {{action 'add'}}>Add 1</button>

twiddle.json

{
  "version": "0.10.4",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.7.0",
    "ember-data": "2.7.0",
    "ember-template-compiler": "2.7.0"
  },
  "addons": {}
}