Are you sure you need elaboration? They're rendering natively when opened: https://i.imgur.com/1Q7KjB0.png

Windows 98 dropdowns look like e.g.: https://imgur.com/rVQhAIq

Although I agree that it breaks immersion but using JS would certainly make this too complicated and probably not worth it, considering it will be buggy for sure.

There might be a way: https://web.dev/state-of-css-2022/#customizing-select-elemen...