Clarification on non-browserify integration

[DullReferenceException]

Given the description of this project:

Isomorphic WHATWG Fetch API, for Node & Browserify

It seems to imply it is incompatible with webpack. However, looking at the code here, there's this comment:

// Return that as the export for use in Webpack, Browserify etc.

...and I don't see anything that is explicitly Browserify-only here.

Has this been verified to work/not work with webpack bundles? It would be nice to call this out explicitly in the README.

[JohanBjoerklund]

I haven't tried it with webpack, but it does not work with rollup.

[matthew-andrews]

I think webpack should work, that's how we use(d) at the FT.

[matthew-andrews]

[didn't mean to close this, sorry!]

[SirGordon]

I'm using webpack and it doesnt work on old browsers that don't have fetch variable.
Is there any workaround / fix / alternative?
(or maybe I'm doing something wrong?)