Bubble Example

routes.application.js

import Ember from 'ember';

export default Ember.Route.extend({
  
  actions: {
    foo() {
      alert("I'm the application route");
    }
  }
  
});

routes.index.js

import Ember from 'ember';

export default Ember.Route.extend({
  
  actions: {
    foo() {
      return confirm('Index route intercepted your action. Should it bubble to the application route?'); 
    }
  }
  
});

templates.application.hbs

<h1>Application Template</h1>
<button {{ action 'foo' }}>Button on Application</button>
<br>
<br>
{{outlet}}
<br>
<br>

templates.index.hbs

<h2>Index Template</h2>

twiddle.json

{
  "version": "0.8.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.5.1",
    "ember-data": "2.5.2",
    "ember-template-compiler": "2.5.1"
  }
}