webpack.config.js

const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const ForkTsCheckerWebpackPlugin = require('fork-ts-checker-webpack-plugin');
const outputDir = path.join(__dirname, 'build');

const isProd = process.env.NODE_ENV === 'production';

module.exports = {
  entry: './src/Index.bs.js',
  mode: isProd ? 'production' : 'development',
  output: {
    path: outputDir,
    publicPath: '/',
    filename: 'Index.js',
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: 'src/index.html',
      filename: 'index.html',
      inject: false,
    }),
    new MiniCssExtractPlugin({
      filename: 'Index.css',
    }),
    new ForkTsCheckerWebpackPlugin(),
  ],
  resolve: {
    // Add `.ts` and `.tsx` as a resolvable extension.
    extensions: ['.ts', '.tsx', '.js'],
    alias: {
      'react-dom': '@hot-loader/react-dom',
    },
  },
  module: {
    rules: [
      {
        test: /\.ts$/,
        include: [path.resolve(__dirname, 'src')],
        loader: 'babel-loader',
        options: {
          plugins: [
            ['@babel/plugin-transform-typescript', {isTSX: false}],
          ],
        },
      },
      {
        test: /\.tsx$/,
        include: [path.resolve(__dirname, 'src')],
        loader: 'babel-loader',
        options: {
          plugins: [
            ['@babel/plugin-transform-typescript', {isTSX: true}],
          ],
        },
      },
      {
        test: /\.js$/,
        include: [path.resolve(__dirname, 'src')],
        loader: 'babel-loader',
      },
      {
        test: /\.css$/,
        use: [
          {
            loader: MiniCssExtractPlugin.loader,
            options: {
              hmr: !isProd,
            },
          },
          'css-loader',
          {
            loader: 'postcss-loader',
            options: {
              plugins: () => [
                require('autoprefixer'),
                require('precss'),
              ],
            },
          },
        ],
      },
    ],
  },
  devServer: {
    hot: true,
    compress: true,
    contentBase: outputDir,
    port: process.env.PORT || 8000,
    historyApiFallback: true,
    index: 'index.html',
  },
};