New Twiddle

components.my-button.js

import Ember from 'ember';

let answer = 0;

export default Ember.Component.extend({
  isSaving: false,
  clickCount: 0,

  actions: {
    cancel() {
      this.set('isSaving', false);
      this.set('clickCount', 0);
    },
    
    save() {
      this.incrementProperty('clickCount');
      this.set('isSaving', true);
            
      for (let i = 0; i < 10000; i++) {
        console.log(i * i + 'hello');
      }
    }
  }
});

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>
{{my-button}}
<br>
<br>

templates.components.my-button.hbs

<button onclick={{action 'save'}} disabled={{isSaving}}>Click</button>

<p>Click count: {{clickCount}}</p>

<button onclick={{action 'cancel'}}>Cancel</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"
  }
}