Offcanvas Contextual

components.my-offcanvas-controls.js

import Ember from 'ember';

export default Ember.Component.extend({
    tagName: 'button'
});

components.my-offcanvas-main.js

import Ember from 'ember';

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

components.my-offcanvas-sidebar.js

import Ember from 'ember';

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

components.my-offcanvas.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: 'Ember Twiddle'
});

templates.application.hbs

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

{{#my-offcanvas as |oc|}}
  {{#oc.sidebar}}
    The sidebar
  {{/oc.sidebar}}
  {{#oc.controls}}
    btn
  {{/oc.controls}}
  {{#oc.main}}
    Main Content Area
  {{/oc.main}}
{{/my-offcanvas}}

templates.components.my-offcanvas-controls.hbs

{{yield}}

templates.components.my-offcanvas-main.hbs

{{yield}}

templates.components.my-offcanvas-sidebar.hbs

isOpen =  {{isOpen}}<br>
{{#if isOpen}}
    {{yield}}
{{/if}}

templates.components.my-offcanvas.hbs

{{yield (hash
  controls=(component 'my-offcanvas-controls' click=(action 'toggle'))
  sidebar=(component 'my-offcanvas-sidebar' isOpen=isOpen)
  main=(component 'my-offcanvas-main')
)}}

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"
  }
}