New Twiddle

components.my-component.js

import Ember from 'ember';

export default Ember.Component.extend({
});

controllers.application.js

import Ember from 'ember';

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

helpers.permissions.js

import Ember from 'ember'

export function permissions([permission]) {
  const permissions = Ember.inject.service()
  debugger
  console.log(permissions)
  return true
}

export default Ember.Helper.helper(permissions);

services.permissions.js

import Ember from 'ember';

export default Ember.Service.extend({
  permissions: {
    'view-alarms': false
  },
  
  isPermitted(permissions) {
    return false
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
<div>I'm above</div>
{{my-component isVisible=(permissions 'view-alarms')}}
<div>I'm below</div>
<br>
<br>

templates.components.my-component.hbs

<div>I'm a component</div>

twiddle.json

{
  "version": "0.10.4",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.7.0",
    "ember-data": "2.7.0",
    "ember-template-compiler": "2.7.0"
  },
  "addons": {}
}