tailwindcss/integrations/rollup-sass/rollup.config.mjs

import postcss from 'rollup-plugin-postcss'

export default {
  input: './src/index.js',
  output: {
    file: './dist/index.js',
    format: 'cjs',
  },
  plugins: [
    postcss({
      extract: true,
    }),
  ],
}