Tab-list

components.tab-item.js

import Ember from 'ember';

export default Ember.Component.extend({
  tagName: 'li',
  label: null,
  click() {
    this.send('toggleActiveTab', this.get('label')
   }
  
});

components.tab-list.js

import Ember from 'ember';

export default Ember.Component.extend({
  tagName: 'ul',
  className: 'tab-list',
  activeTab: null,
  
  actions: {
    toggleActiveTab(name) {
   		this.set('activeTab', name);   
    },
  }
});

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>
{{#tab-list activeTab="brief" as |tabList| }}
	{{tab-item
  	label="brief"
    activeTab=tabList.activeTab}}
   {{tab-item
  	label="application"
    activeTab=tabList.activeTab}}
	<li>Current Active Tab: {{tabList.activeTab}}</li>
{{/tab-list}}


{{outlet}}
<br>
<br>

templates.components.tab-item.hbs

{{label}}

templates.components.tab-list.hbs

{{yield (hash activeTab=activeTab)}}

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"
  }
}