New Twiddle

components.my-component.js

import Ember from 'ember';

Ember.testing = true;

export default Ember.Component.extend({
  attributeBindings: ['style'],
  style: 'height: 100px; overflow: auto;',
  content: Ember.computed(function() {
    return 'foo';
  }),
  didInsertElement: function() { 
    this.$().scroll(function() {
      Ember.run.once(Ember.K);
    });
  },
  actions: {
    scroll: function() {
      this.$().scrollTop(Math.random() * 500)
    },
    safeScroll: function() {
      Ember.run.begin();
      this.$().one('scroll', Ember.run.end)
              .scrollTop(Math.random() * 500);
    }
  }
});

controllers.application.js

import Ember from 'ember';

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

templates.application.hbs

{{my-component}}

templates.components.my-component.hbs

<div style="position: fixed">
  <button {{ action "safeScroll" }}>Safe scroll</button>
  <button {{ action "scroll" }}>scroll</button>
</div>
<div style="height: 500px; background: linear-gradient(to bottom, rgba(255,255,255,1) 0%, rgba(0,0,0,1) 100%);"></div>

twiddle.json

{
  "version": "0.10.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.6.0",
    "ember-data": "2.6.1",
    "ember-template-compiler": "2.6.0"
  },
  "addons": {}
}