Fix duplicate stylesheet registration when a CSS is imported by more than one entrypoints

[kucrut]

See #86 (comment)

[netlas]

My solution #86 relied on wordpress wp_enqueue_style removing duplicate registered handles once that is called. Was that not working properly? Or would you rather have it removed from the internal asset array?

[kucrut]

From your example manifest file, I registered resources/js/admin.ts and resources/js/admin_menu.ts as two different assets with Vite\enqueue_asset(). Since they have different handles, the assets/Menu-c4e73a0f.css they load have different handles as well, hence the duplication.

[netlas]

I see what you mean now. A possible solution would be to remove the handle option as a prefix.
replace row 347

$style_handle = "{$options['handle']}-{$slug}";

with

$style_handle = $slug;

Vite is making filenames unique, so an extra prefix in the handles are not necessary for any other reason than semantics.