New Twiddle

application.controller.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName:'Ember Twiddle',
  actions: {
  	commentSave() {
    	console.log('comment save');
    }
  }
});

application.template.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{custom-textarea type="text" placeholder="Comment" value=comment_text autofocus="autofocus" rows=1 max-rows=4 autoresize=true 
      enter="commentSave"}}
<br>
<br>

custom-textarea.component.js

import Ember from 'ember';

export default Ember.TextArea.extend({
  didRender() {
    this.$().keypress(function(event) {
      if (event.keyCode == 13) {
        event.preventDefault();
      }
    });
  }
});

custom-textarea.template.hbs

{{yield}}

twiddle.json

{
  "version": "0.5.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.2.0/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/2.2.0/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.2.0/ember-template-compiler.js"
  }
}