adrema/webpack.mix.js

const mix = require('laravel-mix');
const tailwindcss = require('tailwindcss');
const atImport = require('postcss-import');
const nested = require('tailwindcss/nesting');

mix.setResourceRoot('/');

/*
 |--------------------------------------------------------------------------
 | Mix Asset Management
 |--------------------------------------------------------------------------
 |
 | Mix provides a clean, fluent API for defining some Webpack build steps
 | for your Laravel application. By default, we are compiling the Sass
 | file for the application as well as bundling up all the JS files.
 |
 */

mix.js('resources/js/app.js', 'public/js')
    .vue({version: 2})
    .postCss('resources/css/app.css', 'public/css', [atImport(), nested(), tailwindcss('./tailwind.config.js')])
    .copy('resources/img', 'public/img');