postcss.config.js

const cssnano = require('cssnano')
const purgecss = require('@fullhuman/postcss-purgecss')({
  // Specify the paths to all of the template files in your project
  content: ['./routes/**/*.njk', './views/**/*.njk'],

  // Include any special characters you're using in this regular expression
  defaultExtractor: content => content.match(/[\w-/:]+(?<!:)/g) || [],
})

module.exports = {
  plugins: [
    require('@csstools/postcss-sass'),
    require('tailwindcss'),
    cssnano({
      preset: 'default',
    }),
    require('autoprefixer'),
    ...(process.env.NODE_ENV === 'production' ? [purgecss] : []),
  ],
}