New Twiddle

components.no-op.js

import Ember from 'ember';

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

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  name: 'Godfrey'
});

helpers.block.js

import Ember from 'ember';

export function block([name]) {
	return { [name]: "no-op" };
}

export default Ember.Helper.helper(block);

templates.application.hbs

<h1>Named Blocks Demo</h1>

{{#foo-bar as |blocks|}}
	{{#blocks.header}}
    <h2>Welcome {{name}}</h2>
  {{/blocks.header}}
  
  {{#blocks.main}}
  	<p><label>Name {{input value=name}}</label></p>
  {{/blocks.main}}
  
  {{#blocks.footer}}
		<footer>&copy; 2017 Tilde Inc.</footer>
  {{/blocks.footer}}
{{/foo-bar}}

templates.components.foo-bar.hbs

<fieldset>
  <legend>header block</legend>
  {{yield (block "header")}}
</fieldset>

<fieldset>
  <legend>main block</legend>
  {{yield (block "main")}}
</fieldset>

<fieldset>
  <legend>footer block</legend>
  {{yield (block "footer")}}
</fieldset>

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"
  }
}