Bun and Deno support .jsx and .tsx files out of the box.

https://bun.sh/docs/runtime/jsx

https://docs.deno.com/runtime/manual/advanced/jsx_dom/jsx/

You have to sub the JSX factory, eg React.createElement with a library that spits out html instead of building a DOM tree.

It's not hard to do, for example I created this tiny library to play around with async server-side components. https://github.com/dsego/ssr_jsx

I think for Deno you have their Fresh framework which does JSX components https://fresh.deno.dev/.

If you like JSX as a templating language and you want to generate simple html strings then just use vhtml with TypeScript [1][2]. You have to import the h function from vhtml in your tsx files, and then update your tsconfig file so that TypeScript knows what to transform the JSX into:

  "jsx": "react",
  "jsxFactory": "h",
  "jsxFragmentFactory": "null",

If you want something a little more powerful then hono/jsx is a decent choice [3].

[1] https://github.com/developit/vhtml

[2] https://github.com/developit/vhtml/issues/31

[3] https://hono.dev/docs/guides/jsx

Yes, would like to know too. I know that the latest version of React features more SSR capabilities of components without (I think, but don't know for sure) the requirement of NextJS.