Helper Help

controllers.application.js

import Ember from 'ember'

export default Ember.Controller.extend({
})

helpers.background-style.js

import Ember from 'ember'

import ImageLink from './image-link'

export default ImageLink.extend({
    compute(params, hash) {
			const val = this._super(params, hash)
      return val + '2'
    }
})

helpers.image-link.js

import Ember from 'ember'

 export default Ember.Helper.extend({
   
    compute(params, hash) {
        return 'empty'
    }

});

templates.application.hbs

{{image-link}} <br/>
{{background-style}}

twiddle.json

{
  "version": "0.8.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.5.1",
    "ember-data": "2.5.2",
    "ember-template-compiler": "2.5.1"
  }
}