Cp Dep

controllers.application.js

import Ember from 'ember';
import { computed } from '@ember/object';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  color: 'none',
  isGreen: computed('', function() {
    return this.get('color') === 'green';
  }),
  isGreenCorrect: computed('color', function() {
    return this.get('color') === 'green';
  }),
  actions: {
    selected(color) {
    	this.set('color', color)
    }
  }
});

templates.application.hbs

<div style="padding:5px">
<button {{action 'selected' 'green'}} style="padding:5px"> green</button>
<button {{action 'selected' 'yellow'}} style="padding:5px"> yellow</button>
</div>

<div style="padding:5px">IsGreen checked: {{isGreen}} (Without CP Dep)</div>
<div style="padding:5px">IsGreen checked: {{isGreenCorrect}} (With CP Dep) </div>

<div style="padding:5px">Color: {{color}}</div>

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": "3.4.3",
    "ember-template-compiler": "3.4.3",
    "ember-testing": "3.4.3"
  },
  "addons": {
    "ember-data": "3.4.2"
  }
}