ActionsUp

components.a-component.js

import Ember from 'ember';

export default Ember.Component.extend({
  tagName: 'button',
  
  result: 0,
  
  click() {
    this.set('result', Math.random());
    const result = this.get('result');
    
  	this.get('onResult')(result);
  }  
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  value: null,
  
  actions: {
  	showResult(result) {
      this.set('value', result);
    },
  },
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>

{{a-component onResult=(action 'showResult')}}

<strong>{{value}}</strong>

{{outlet}}
<br>
<br>

templates.components.a-component.hbs

Show me a result.

{{yield}}

twiddle.json

{
  "version": "0.11.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.10.2",
    "ember-data": "2.11.0",
    "ember-template-compiler": "2.10.2",
    "ember-testing": "2.10.2"
  },
  "addons": {}
}