Sveltekit with typescript and adapter-static.

Sveltekit scales down very well: if you need only CSS and HTML for some paths, that's all you write in your svelte files, and that's also all users download. At the same time if for some other paths you need more Javascript, you can just add it there, without bloating the JS bundle size. Svelte's built-in stores makes it also possible to also do very complex state management, if that's ever a need. With vite under the hood the dev experience is lightning fast.