yield template helper

application.controller.js

import Ember from 'ember';

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

application.template.hbs

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

<h2>no block <code>form-textarea</code></h2>
{{#form-textarea value='myValue' as |textarea|}}
	{{textarea.element rows="20"}}
{{/form-textarea}}

form-textarea.component.js

import Ember from 'ember';

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

form-textarea.template.hbs

{{yield (hash
	element=(textarea value=value)
)}}

twiddle.json

{
  "version": "0.4.17",
  "EmberENV": {
    "FEATURES": {}
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "canary",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/2.2.0/ember-data.js",
    "ember-template-compiler": "canary"
  }
}