Hot module reloading for CSS changes

[PierBover]

CSS changes in Astro components and external CSS files always seem trigger a full page reload. It would be nice if HMR was used instead.

Initially I thought this was a bug since all LLMs assure me HMR should be working with CSS changes... but apparently it's expected behavior since HMR does work with styles defined inside UI frameworks like Vue.

Edit:

Might this actually be a bug?

Apparently these PRs from 2024 somehow improved/fixed this?

withastro/astro#10166

withastro/astro#10139

[PierBover]

I've reported a bug:

withastro/astro#14196