New Twiddle

application.controller.js

import Ember from 'ember';

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

application.template.hbs

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

{{parent-component}}
<br>
<br>

child-component.component.js

import Ember from 'ember';

export default Ember.Component.extend({
  actions: {
    change() {
      this.get('changeFramework')('reactjs');
    }
  }
});

child-component.template.hbs

{{yield}}
<h4>Child Component</h4>
{{input value=fileName}}

{{fileName}}

parent-component.component.js

import Ember from 'ember';

export default Ember.Component.extend({
  fileName: 'emberjs',
  
  init() {
    this._super(...arguments);
    this.set('stashedFileName', this.get('fileName'));
  },
  
  _ajax() {
    return new Ember.RSVP.Promise((resolve, reject) => {
      Ember.run.later(() => {
        reject();
      }, 300);
    });
  },
  
  actions: {
    save() {
      this._ajax().catch(() => {
        this.set('fileName', this.get('stashedFileName'));
      });
    }
  }
});

parent-component.template.hbs

<h1>Parent Component - {{fileName}}</h1>


{{child-component fileName=fileName}}

<button {{action "save"}}>Save</button>

twiddle.json

{
  "version": "0.6.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.3.1/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/2.3.3/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.2.0/ember-template-compiler.js"
  }
}