counter

components.my-counter.js

import Ember from 'ember';

export default Ember.Component.extend({
});			

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  vorname: 'Hussein',
  nachname: 'Morsy',
  firmenname: 'MorSystem',
  zahl: 0,
  isNegative: Ember.computed.lt('zahl',0),
  actions: {
    rauf() {
      var neueZahl = this.get('zahl') + 1;
      this.set('zahl', neueZahl);
    },
    runter() {
      var neueZahl = this.get('zahl') - 1;
      this.set('zahl', neueZahl);
    }   
    
  }
});

templates.application.hbs

<h1>Hallo {{vorname}}</h1>
<p> Dein Nachname ist {{nachname}}</p>
<br>{{my-counter}}
<p>2016 {{firmenname}}</p>

templates.components.my-counter.hbs

Zähler: <span style="{{if isNegative 'color: red'}}">{{zahl}}</span>
<br>
<button onclick={{action "rauf"}}>rauf</button>
<br>
<button {{action "runter"}}>runter</button>

twiddle.json

{
  "version": "0.7.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.4.3/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/2.4.3/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.4.3/ember-template-compiler.js"
  }
}