Using syncfusion_flutter_pdfviewer with flutter web

The package syncfusion_flutter_pdfviewer just released on May 19th and I wanted to use it to port my app into web but it doesn't work. My code looks like this:

class _VPMontagState extends State<VPMontag> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('mytext'),
      ),
      body: Container(
        child: SfPdfViewer.network('myurl'),
      )
    );
  }
}

They also wrote in their documentation that you should add

<script src="//cdnjs.cloudflare.com/ajax/libs/pdf.js/2.4.456/pdf.min.js"></script>
<script type="text/javascript">
   pdfjsLib.GlobalWorkerOptions.workerSrc = "//cdnjs.cloudflare.com/ajax/libs/pdf.js/2.4.456/pdf.worker.min.js";
</script>

into the index.html. I did that and it didn't work anyways.