New Twiddle

components.top-nav.js

import Ember from 'ember';

export default Ember.Component.extend({
  init() {
    this._super(...arguments);
    
    // To simulate async data loading
    window.setTimeout(() => {
      this.set('becomeAMemberLink', 'http://google.com');
    }, 500);
  }
});

controllers.application.js

import Ember from 'ember';

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

templates.application.hbs

{{top-nav}}

templates.components.top-nav.hbs

{{#if becomeAMemberLink}}
	<a href="{{becomeAMemberLink}}">Something Here</a>
{{else}}
	Loading link URL
{{/if}}

twiddle.json

{
  "version": "0.14.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "2.18.2",
    "ember-template-compiler": "2.18.2",
    "ember-testing": "2.18.2"
  },
  "addons": {
    "ember-data": "2.18.2"
  }
}