ViteJS lets Rollup handle assets on build and expose the bundle. However on dev, ViteJS transform and inject the css directly for small chunk.

From ViteJS doc:

Output Generation Hooks (except closeBundle) are not called during dev. You can think of Vite's dev server as only calling rollup.rollup() without calling bundle.generate().

A solution could be to catch assets from difference source exposed on dev (because the bundle is empty on dev) :

• assets from css via post:css hook
• scripts from ?? (need more investigation)
• styles from ?? (need more investigation)

I don't know if the support of dev mode is pertinent/necessary. Tell me if you need this or why this is completely unnecessary to do ^^

[EDIT] After reflection, there is no use to this with the behaviour of vite. I close this issue. You can still comment this issue if you think I'm wrong.