New Twiddle

controllers.application.js

import Ember from 'ember';
import { cssTransform } from '../helpers/css-transform';

const { computed } = Ember;

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  styles: computed(function() {
    let width = '300px';
    return cssTransform(`translate3d(${width}, 0, 0)`).htmlSafe();
  })
});

helpers.css-transform.js

import Ember from 'ember';

export function cssTransform(params/*, hash*/) {
  let translate = params;
  return `transform: ${translate};
					-webkit-transform: ${translate}`;
}

export default Ember.Helper.helper(cssTransform);

templates.application.hbs

{{styles}}

twiddle.json

{
  "version": "0.10.6",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.9.0",
    "ember-data": "2.9.0",
    "ember-template-compiler": "2.9.0",
    "ember-testing": "2.9.0"
  },
  "addons": {}
}