Inline Components

components.final-leaf.js

import Ember from 'ember';

export default Ember.Component.extend({
  click() {
    this.show();
  }
});

components.mid-level.js

import Ember from 'ember';

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

components.top-level.js

import Ember from 'ember';

export default Ember.Component.extend({
  actions: {
    show() {
      alert('Top Level!');
    }
  }
});

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}}
{{top-level}}
<br>
<br>

templates.components.final-leaf.hbs

Leafy
{{yield}}

{{#if showMe}}
<div>
	I'm here!
</div>
{{/if}}

templates.components.mid-level.hbs

Mid level
{{yield}}
{{final-leaf showMe=true show=show}}

templates.components.top-level.hbs

Top level
{{yield}}
{{mid-level showMe=true show=(action 'show')}}

twiddle.json

{
  "version": "0.14.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "2.18.2",
    "ember-template-compiler": "2.18.2",
    "ember-testing": "2.18.2"
  },
  "addons": {
    "ember-data": "2.18.2"
  }
}