PostCSS Config file for Svelte Sapper site using Tailwind and Markdown files

postcss.config.js

const tailwindcss = require("tailwindcss");
const cssnano = require('cssnano');

const purgecss = require("@fullhuman/postcss-purgecss")({
  content: ["./src/**/*.svelte", "./src/**/*.html", "./src/**/*.md"],
  defaultExtractor: content => content.match(/[A-Za-z0-9-_:/]+/g) || []
});

module.exports = {
  plugins: [
    tailwindcss("./tailwind.js"),
    	require('cssnano')({
    		preset: 'default',
		}),

    ...(process.env.NODE_ENV === "production" ? [purgecss] : []),

  ]
};