webpack.config.js

const path = require('path')
const HtmlWebPackPlugin = require('html-webpack-plugin')
const MiniCssExtractPlugin = require('mini-css-extract-plugin')

module.exports = {
  output: {
    path: path.resolve(__dirname, 'build'),
    filename: 'bundle.js',
  },
  resolve: {
    extensions: ['.tsx', '.ts', '.js', '.css'],
    modules: ['node_modules'],
    alias: {
      react: path.join(__dirname, 'node_modules', 'react'),
    },
  },
  module: {
    rules: [
      {
        test: /\.(ts|tsx)$/,
        use: 'ts-loader',
        exclude: /node_modules/,
      },
      {
        test: /\.module.css$/,
        use: [
          MiniCssExtractPlugin.loader,
          {
            loader: 'css-loader',
            options: {
              modules: {
                localIdentName: '[name]__[local]--[hash:base64:5]',
              },
            },
          },
        ],
      },
      {
        test: /\.css$/,
        exclude: /\.module.css$/,
        use: [MiniCssExtractPlugin.loader, 'css-loader'],
      },
    ],
  },
  plugins: [
    new HtmlWebPackPlugin({
      template: './public/index.html',
    }),
    new MiniCssExtractPlugin({
      filename: ({ chunk }) => `${chunk.name.replace('/js/', '/css/')}.css`,
      // chunkFilename: "[name].css"
    }),
  ],
  devServer: {
    port: 3000,
  },
}