How to use Tailwind in a Chrome extensions?

As many of you know Chrome extensions are just regular javascript/css/html files.
Since there is no tailwind.min.css file and there is no npm in a Vanilla chrome extensions this leads me to the question:

How does one use Tailwind in an existing chrome extensions?

Please note that migrating the entire extension to some React template that finally builds into an extension is not a reasonable solution to just include tailwind styles.