How do I use Jitsi Meet in an EmberJS app

In my Ember app I'm using ember-inject-script which I installed:

npm install --save-dev ember-inject-script

The controller.js file for my page looks like this:

import Ember from 'ember';
import injectScript from 'ember-inject-script';

export default Ember.Controller.extend({
  init: function() {
    this._super();
    var url = "https://meet.jit.si/external_api.js";
    injectScript(url);
    var domain = "meet.jit.si";
    var room = "JitsiMeetAPIExample";
    var width = 700;
    var height = 700;
    var htmlElement = document.querySelector('#meet');
    var api = new JitsiMeetExternalAPI(domain, room, width, height, 
              htmlElement);
  }
});

The Template is this:

<h2>Jitsi Meet</h2>
<div id="meet"></div>
{{outlet}}

Yet I get a console error:

Error while processing route: projects.index JitsiMeetExternalAPI is not defined ReferenceError: JitsiMeetExternalAPI is not defined