Contextual Components Part 1

components.collapsible-panel-body.js

import Ember from 'ember';

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

components.collapsible-panel-header.js

import Ember from 'ember';

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

components.collapsible-panel.js

import Ember from 'ember';

export default Ember.Component.extend({
  isOpen: true,
	actions: {
    toggle() {
    	this.toggleProperty('isOpen');
    }
  }
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Route to Contextual Components',

});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{#collapsible-panel as |panel| }}
	{{#panel.header}}
  	Section 1
  {{/panel.header}}
  {{#panel.body}}
  	 <p>Lorem ipsum dolor sit amet, consectetur adipisicing 	elit</p>
  {{/panel.body}}
  
{{/collapsible-panel}}

<br>
<br>

templates.components.collapsible-panel-body.hbs

{{#if isOpen}}
	{{yield}}
{{/if}}

templates.components.collapsible-panel-header.hbs

<button>{{yield}}</button>

templates.components.collapsible-panel.hbs

{{yield (hash
  header=(component 'collapsible-panel-header' onClick=(action 'toggle'))
  body=(component 'collapsible-panel-body' isOpen=isOpen)
)}}

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"
  }
}