I am trying to use the iFrameResizer package on a parent site and embed a basic react page via an iframe. To the parents site's index.html I've added the following code:

<iframe frameborder="0" id="sizetracker" src="http://localhost:3001" width="100%"
    style="position: fixed; z-index: 1000; bottom: 0; right: 0"></iframe>
<script src="https://cdn.jsdelivr.net/npm/iframe-resizer@4.2.11/index.min.js"></script>
<script>
    window.iFrameResize({ log: true }, '#sizetracker') // error thrown here
</script>

I'm using a cdn to add the package. I've tried the CDN from unpkg (via https://unpkg.com/iframe-resizer@4.3.2/index.js) as well as the url in the src attribute above that I got from js-delivr.

Two errors are thrown:

1. Uncaught ReferenceError: module is not defined - this seems to be coming from the CDN's index.js
2. Uncaught TypeError: window.iFrameResize is not a function - I'm guessing this is because of the above failed error.

How can I correctly import via CDN and then use that npm package in script tags in my html?