One-way binding on components

application.controller.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle'
});

application.template.hbs

{{my-component isValid=isValid}}
Your name is {{#if isValid}}valid{{else}}not valid{{/if}}

my-component.component.js

import Ember from 'ember';

export default Ember.Component.extend({
  isValid: function() {
    return !!this.get('name');
  }.property('name')
});

my-component.template.hbs

{{input value=name placeholder='Your name'}}

twiddle.json

{
  "version": "0.6.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "1.13.13",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/2.3.3/ember-data.js",
    "ember-template-compiler": "1.13.13"
  }
}