Setting CPs

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  firstname: '',
  lastname: '',
  fullName: Ember.computed('firstname', 'lastname', function() {
  	return `${this.get('firstname')} ${this.get('lastname')}`
  }),
  actions: {
  	setCP() {
      this.fullName = 'batman'
      // console.log(this.fullName)
    	this.set('fullName', 'batman')
    }
  }
});

templates.application.hbs

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

{{input value=firstname}}
{{input value=lastname}}
<div>
{{fullName}}
</div>
<button {{action 'setCP'}}>set</button>
<br>
<br>

twiddle.json

{
  "version": "0.15.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "2.12.0",
    "ember-template-compiler": "2.12.0",
    "ember-testing": "2.12.0"
  },
  "addons": {
    "ember-data": "3.4.2"
  }
}