datatable.directory/webpack.mix.js

let mix = require('laravel-mix');
let webpack = require('webpack');

/*
 |--------------------------------------------------------------------------
 | 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.webpackConfig({
  // Force jquery slim - https://code.luasoftware.com/tutorials/webpack/force-jquery-slim-import-in-webpack/
  resolve: {
    extensions: ['.js'],
    alias: {
      'jquery': 'jquery/dist/jquery.slim.js',
    }
  },
  plugins: [
    new webpack.ProvidePlugin({
      '$': 'jquery',
      jQuery: 'jquery',
    }),
  ],
});

mix.js('resources/assets/js/app.js', 'public/js')
   .sass('resources/assets/sass/app.scss', 'public/css');