Mix with tailwindCSS and Purgecss

Install purgecss

npm install laravel-mix-purgecss --save-dev

Go to webpack.mix.js and add:

const mix = require('laravel-mix');
const tailwindcss = require('tailwindcss');
require('laravel-mix-purgecss');

mix.js('resources/js/app.js', 'public/js')
   .sass('resources/sass/app.scss', 'public/css')
   .options({
        processCssUrls: false,
        postCss: [ tailwindcss('./tailwind.config.js') ],
    }).purgeCss();