New Twiddle

components.scroll-component.js

import Ember from 'ember';
const {$} = Ember;
export default Ember.Component.extend({
  classNames: ['scroll-area'],
  didInsertElement(){
   $('.scroll-area').on('scroll', function(){
     console.log("aah");
   });
  },
  scrolling(){
   console.log("wow");
  }
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  messages: Ember.A(),
  
   init: function () {
    this._super();
    for(let i =0; i < 30; i++){
			this.get('messages').push('sample');
    // other setup here...
  }
   }
});

styles.app.css

body {
  margin: 12px 16px;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 12pt;
}
.fix-height{
	max-height: 60px;
  overflow-y: scroll;
}

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{scroll-component messages = messages }}
<br>
<br>

templates.components.scroll-component.hbs

<ul class="fix-height">
{{#each messages as |message|}}
  
  <li>{{message}}</li>
{{/each}}
</ul>

twiddle.json

{
  "version": "0.13.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.16.2",
    "ember-template-compiler": "2.16.2",
    "ember-testing": "2.16.2"
  },
  "addons": {
    "ember-data": "2.16.3"
  }
}