cp1

components.my-component.js

import Ember from 'ember';

export default Ember.Component.extend({
  
  cpToRender: Ember.computed('selectedLink', function(){
    console.log('componet cp')
  	return this.get('selectedLink.count')
  })
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  count: 0, 
  count1: 0,
  count2: 0,
  obj: Ember.Object.create({
  	count: 0
  }),
  
  selectedLink: Ember.computed('count', function() {
  	return {}
  }),
  
  localCp: Ember.computed('selectedLink', function() {
  	return this.get('obj').set('count', this.get('count'))
  }),
  
  actions: {
  	increaseCount () {
      this.set('count1', this.get('count1') + 1)
      this.set('count', this.get('count') + 1)
    }
  }
});

templates.application.hbs

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

localCp: {{localCp}}

<button {{action (action 'increaseCount')}}>Change link obj</button>


{{my-component selectedLink=selectedLink}}
{{outlet}}
<br>
<br>

templates.components.my-component.hbs

My component template.

{{cpToRender}} 
{{yield}}

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": "2.8.2",
    "ember-template-compiler": "2.8.2",
    "ember-testing": "2.8.2"
  },
  "addons": {
    "ember-data": "2.12.1"
  }
}