New Twiddle

application.controller.js

import Ember from 'ember';

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

application.route.js

import Ember from 'ember';

export default Ember.Route.extend({
  model() {
    var stuff = [];
    for (var i = 0; i < 1000; i++) {
      stuff.push({name: 'Item' + i});
    }
    return stuff;
  }
});

application.template.hbs

<h1>Simple ember-collection Twiddle Demo!</h1>

<div style="position: relative;height: 200px; width: 400px;">
  {{#ember-collection items=model cell-layout=(fixed-grid-layout 400 20) as |item|}}
    {{item.name}}
  {{/ember-collection}}
</div>

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": "2.2.0",
    "ember-data": "2.2.0",
    "ember-template-compiler": "2.2.0",
    "ember-collection": "https://rawgit.com/rwjblue/e4b74b094b5955ba9b35/raw/cce3b30ff156d778e61061c95b7834ace7592a8c/ember-collection-demo.js"
  }
}