webpack.config.js

const Webpack = require("webpack");
const Glob = require("glob");
const path = require('path');
const CopyWebpackPlugin = require("copy-webpack-plugin");
const MiniCssExtractPlugin = require("mini-css-extract-plugin");
const ManifestPlugin = require("webpack-manifest-plugin");
const CleanObsoleteChunks = require('webpack-clean-obsolete-chunks');
const UglifyJsPlugin = require("uglifyjs-webpack-plugin");
const LiveReloadPlugin = require('webpack-livereload-plugin');
const TsconfigPathsPlugin = require('tsconfig-paths-webpack-plugin');

const configurator = {
  plugins() {
    var plugins = [
      new CleanObsoleteChunks(),
      new Webpack.ProvidePlugin({$: "jquery",jQuery: "jquery"}),
      new MiniCssExtractPlugin({filename: "[name].[contenthash].css"}),
      new CopyWebpackPlugin({patterns: [{from: "./assets",to: ""}]}, {copyUnmodified: true,ignore: ["css/**", "js/**", "src/**"] }),
      new Webpack.LoaderOptionsPlugin({minimize: true,debug: false}),
      new ManifestPlugin({fileName: "manifest.json"})
    ];

    return plugins
  },

  moduleOptions: function() {
    return {
      rules: [
        {
          test: /\.s[ac]ss$/,
          use: [
            MiniCssExtractPlugin.loader,
            { loader: "css-loader", options: {sourceMap: true}},
            { loader: "sass-loader", options: {sourceMap: true, includePaths: [ "/node_modules/@patternfly/patternfly/" ]}}
          ]
        },
        { test: /\.tsx?$/, use: "ts-loader", exclude: /node_modules/},
        { test: /\.jsx?$/, loader: "babel-loader",exclude: /node_modules/ },
        { test: /\.(woff|woff2|ttf|svg|png|jpg)(\?v=\d+\.\d+\.\d+)?$/,use: "url-loader"},
        { test: /\.eot(\?v=\d+\.\d+\.\d+)?$/,use: "file-loader" },
        { test: require.resolve("jquery"),use: "expose-loader?jQuery!expose-loader?$"},
        { test: /\.css$/, use: ["style-loader", "css-loader"] },
        { test: /\.mdx?$/, use: ['babel-loader', '@mdx-js/loader']},
      ]
    }
  },

  buildConfig: function(){
    // NOTE: If you are having issues with this not being set "properly", make
    // sure your GO_ENV is set properly as `buffalo build` overrides NODE_ENV
    // with whatever GO_ENV is set to or "development".
    const env = process.env.NODE_ENV || "development";

    var config = {
      mode: env,
      entry: { app: path.resolve(__dirname, 'assets', 'src', 'index.tsx') },
      output: {filename: "[name].[hash].js", path: `${__dirname}/public/assets`},
      plugins: configurator.plugins(),
      module: configurator.moduleOptions(),
      resolve: {
          extensions: ['.ts', '.js', '.json', '.tsx', '.md'],
          plugins: [
              new TsconfigPathsPlugin({
                  configFile: path.resolve(__dirname, './tsconfig.json')
              })
          ]
      },
      node: { fs: 'empty' },
    }

    if( env === "development" ){
      config.plugins.push(new LiveReloadPlugin({appendScriptTag: true}))
      return config
    }

    const uglifier = new UglifyJsPlugin({
      uglifyOptions: {
        beautify: false,
        mangle: {keep_fnames: true},
        output: {comments: false},
        compress: {}
      }
    })

    config.optimization = {
      minimizer: [uglifier]
    }

    return config
  }
}

module.exports = configurator.buildConfig()