action-bubbling

components.click-me.js

import Ember from 'ember'
import hbs from 'htmlbars-inline-precompile'

export default Ember.Component.extend({
  // The key is the argument to `sendAction`, below.
  // The value is the name of the action that bubbles up. In this case,
  // it matches something in controller:application.
  clickMe: 'clickMeWasClicked',
  
  layout: hbs`
    <button onclick={{action 'onclick'}}>Click me!</button>
  `,
  
  actions: {
    onclick() {
      this.sendAction('clickMe')
    }
  }
})

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  showAThing: false,
  
  actions: {
    clickMeWasClicked() {
      this.set('showAThing', true)
    }
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{click-me}}

{{#if showAThing}}<div>You clicked it!</div>{{/if}}
<br>
<br>

twiddle.json

{
  "version": "0.13.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.16.2",
    "ember-template-compiler": "2.16.2",
    "ember-testing": "2.16.2"
  },
  "addons": {
    "ember-data": "2.16.3"
  }
}