How to use iScroll in Angular / TypeScript project?

I have tried everything to try and use iScroll via TypeScript. I have install the following

npm i iscroll --save npm i @types/iscroll --save

I then imported as follows.. import { IScroll } from 'iscroll';

and then use as per the docs...

var wrapper = document.getElementById('wrapper');
var myScroll = new IScroll(wrapper);

The first error it to do with the typedef not being a module, so I added..

declare module 'Iscroll';

and exported the interface and class.

It now builds but when I try to new up IScroll it is not defined.

Is there any doco on how to use this in this environment?