see the difference

[deleonio]

I learned that I don't need the Vite configuration for Postcss (leanupjs/leanup#1357, leanupjs/leanup#1358). But what I have done is not in itself prohibited.

There two points are relevant:

1. I configure the path to the postcss.config.js.

vite.config.js

export default defineConfig({
  ...
  css: {
    // hear is the problem
    postcss: require(resolve(process.cwd(), "postcss.config")),
  },
  ...
});

2. I use a other notation in postcss.config.js. (see here https://github.com/postcss/postcss#webpack)

Your

module.exports = {
  plugins: {
    "@tailwindcss/jit": {},
    autoprefixer: {},
  },
};

My

module.exports = {
  plugins: [
    require("@tailwindcss/jit"),
    require("autoprefixer")
  ],
};