If you try the new iterator helpers API with TypeScript you might encounter a few issues... IN order to speed up things I have published a tiny typings library, far from perfect, but it should do the trick... www.npmjs.com/package/iter...

npm: iterator-helpers-typings

TypeScript typings for iterator helpers (already available with V8). Latest version: 1.0.0, last published: a day ago. Start using iterator-helpers-typings in your project by running `npm i iterator-h...