Computed Default Attrs

components.test-component.js

import Ember from 'ember';

const { 
  computed,
  get
} = Ember;

export default Ember.Component.extend({
  name: computed('name', function() {
		console.log('here');
  	const name = get(this, 'name');
  	return name === '' ? 'no-name' : 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>
{{test-component 
	name=name
}}
<input 
	value={{name}} 
  oninput={{action (mut name) value="target.value"}}
/>
<br>
<br>

templates.components.test-component.hbs

Your name is: {{name}}

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"
  }
}