Basics_action_bubbling

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  hasHat: true,
  hatColor: "blue",
  colors: ["blue", "red","green", "yellow", "black", "purple", "orange"],
  actions: {
    putOnHat(color){
      this.set('hatColor', color);
			this.set('hasHat', true);
    },
    takeOffHat(){
     this.set('hasHat', false);
      return true;
    },
    pressRelease(){
     	alert("This action is taking place in controller"); 
      // while mentioning return as true it bubbles the action for next execution as well. 
      // otherwise if there are multiple same actions defined in different places, only first will execute
      return true;
    }
  }
});

router.js

import Ember from 'ember';
import config from './config/environment';

const Router = Ember.Router.extend({
  location: 'none',
  rootURL: config.rootURL
});

Router.map(function() {
});

export default Router;

routes.application.js

import Ember from 'ember';

export default Ember.Route.extend({
  actions: {
   pressRelease(){
    	alert("This is press release and action is taking in application.js"); 
   }
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
<h2> Hat.io </h2>
{{#if hasHat }}

<h3> You are wearing a<span style="color:{{hatColor}};"> {{hatColor}} </span> hat </h3> 
<button {{action 'takeOffHat' }}> Take off the Had </button>
{{else}}
<p> You don't have any hat :( </p>
<p> Put on a hat </p> 
{{#each colors as |color| }}
	<button {{action 'putOnHat' color }} style="color:{{color}};" > {{color}} </button>
{{/each}}
{{/if}}

<button {{action 'pressRelease' }}> Press Release </button>
{{outlet}}
<br>
<br>

twiddle.json

{
  "version": "0.13.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.16.2",
    "ember-template-compiler": "2.16.2",
    "ember-testing": "2.16.2"
  },
  "addons": {
    "ember-data": "2.16.3"
  }
}