LCD

components.collapsible-panel.js

import Ember from 'ember';

export default Ember.Component.extend({
  actions: {
    toggleIsOpen() {
      console.log('toggling isOpen from collapsible-panel');
      this.toggleProperty('isOpen');
    }
  }
});

components.main-nav.js

import Ember from 'ember';

export default Ember.Component.extend({
  isOpen: false,
  actions: {
    toggleIsOpen() {
      console.log('toggling isOpen from main-nav');
      this.toggleProperty('isOpen');
    }
  }
});

components.sidebar-nav.js

import Ember from 'ember';

export default Ember.Component.extend({
});

components.toggle-panel.js

import Ember from 'ember';

export default Ember.Component.extend({
  actions: {
    toggleIsOpen() {
      console.log('toggling isOpen from toggle-panel');
      this.toggleProperty('isOpen');
    }
  }
});

controllers.application.js

import Ember from 'ember';

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

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
{{sidebar-nav}}
{{main-nav}}

templates.components.collapsible-panel.hbs

<h3>Collapsible panel</h3>
<p>isOpen: {{isOpen}}</p>
<p {{action 'toggleIsOpen'}}>Toggle content</p>
{{#if isOpen}}
	<p>Real content here...</p>
{{/if}}

templates.components.main-nav.hbs

<h2>Main nav</h2>
<p>isOpen: {{isOpen}}</p>
{{collapsible-panel isOpen=isOpen}}
{{toggle-panel isOpen=isOpen onClick=(action 'toggleIsOpen')}}

templates.components.sidebar-nav.hbs

<h2>Sidebar nav</h2>

templates.components.toggle-panel.hbs

<h3>Toggle panel</h3>
<p>isOpen: {{isOpen}}</p>
<button {{action 'toggleIsOpen'}}>
	{{#if isOpen}}
  	Collapse
  {{else}}
  	Expand
  {{/if}}
</button>

twiddle.json

{
  "version": "0.13.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "canary",
    "ember-template-compiler": "canary",
    "ember-testing": "canary"
  },
  "addons": {
    "ember-data": "canary"
  }
}