you can use static export to also get the HTML/CSS/JS assets for your application. You can read about it here:
https://nextjs.org/docs/app/building-your-application/deploying/static-exports#configuration

But keep in mind the unsupported features: https://nextjs.org/docs/app/building-your-application/deploying/static-exports#unsupported-features

they dont want "js" as its not interactive... and i dont think nextjs is the best fit for that anyway (like i use astro for this simpler side, but when client and server dynamicnes nextjs)

I’m generating static files, but I want to generate them without any JS and just the static html and css

ah mb

Impossible.

Not really an exact answer to my question, but I made a small script to remove scripts from an html file

const cheerio = require('cheerio');
const fs = require('fs');
const firstArg = process.argv.length > 1 ? process.argv[2] : null

if (firstArg && fs.existsSync(firstArg)) {
  const $ = cheerio.load(fs.readFileSync(firstArg));

  // Remove script tags
  $("script").remove();

  // Remove links as script
  $("link[as='script']").remove();

  // Write out the modified html
  fs.writeFileSync(firstArg, $.html())
}

If there was some way to mutate the html after being generated, it could be applied at that stage, but it's just a script to run post-build at this point.

i mean i wonder if you could abuse webpack config

but i would say that you should reconsider using nextjs and instead use something simpler like astro if your not going to keep JS

(like you remove the cool prefetching and layouts not needing to rerender on client)