I've narrowed down the hot reloading issue. It seems that due to the new handle function using import and not require like the old handle function. micro-dev relies on the fact that we can invalidate the cache to then load in the new version. If I migrate the old function internally to micro-dev then the hot reloading works again.

I don't know what the best option would be here. The easiest is to migrate the old function internally, the more complicated version would be to re-write micro-dev to use import, then rely on the new handle function and find a way to invalidate the import cache.

What are your thoughts on this @leerob? 🤔 I cannot seems to find a way, at least online to invalidate the import cache. It appears to be immutable by design.

Gonna have to update to ESM and imports anyway, since micro support it, micro-dev should do it as well. 🤷‍♂️

Superseded by the need for #127, will close this and open another PR once that is closed.