module.exports = () => ({
  plugins: [
    require("postcss-preset-env")({
      stage: 0,
    }),
    require("postcss-import"),
    // See: https://www.gatsbyjs.org/docs/tailwind-css/#option-1-postcss
    require("tailwindcss")("./tailwind.config.js"),
    require("autoprefixer"),
    // See: https://purgecss.com/plugins/postcss.html#usage
    require("@fullhuman/postcss-purgecss")({
      content: ["./src/**/*.js"],
      defaultExtractor: content => content.match(/[\w-/:]+(?<!:)/g) || [],
      whitelist: ['html', 'body', 'gatsby-focus-wrapper']
    }),
    require("cssnano")({
      preset: "default",
    }),
  ],
})