webpack-prod.config.js

const MiniCssExtractPlugin = require('mini-css-extract-plugin');
var HtmlWebpackPlugin = require('html-webpack-plugin');
const TerserPlugin = require('terser-webpack-plugin');
const { CleanWebpackPlugin } = require('clean-webpack-plugin')

module.exports = {
  mode: 'production',
  optimization: {
    minimizer: [new TerserPlugin({ /* additional options here */ })],
  },
  entry: './src/ui/MainPage.tsx',
  // entry: './src/classification2To1.tsx',
  output: {
    filename: 'bundle.js',
    path: __dirname + '/dist/prod',
  },

  resolve: {
    extensions: ['.ts', '.tsx', '.js', '.json'],
  },

  module: {
    rules: [
      {
        test: /\.tsx?$/,
        use: 'ts-loader',
        exclude: /node_modules/
      },
      {
        test: /\.css$/,
        use: [
          {
            loader: MiniCssExtractPlugin.loader,
            options: {
              hmr: false,
            },
          },
          'css-loader',
        ],
      },
    ]
  },

  plugins: [
    new CleanWebpackPlugin(),
    new HtmlWebpackPlugin({ template: './index.html' }),
    new MiniCssExtractPlugin({
      // Options similar to the same options in webpackOptions.output
      // all options are optional
      filename: '[name].css',
      chunkFilename: '[id].css'
    }),
  ]
};