webpack-css-modules.config.js

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

const dev = process.env.NODE_ENV !== 'production';

module.exports = {
  mode: dev ? 'development' : 'production',
  devtool: 'source-map',
  entry: {
    'app-css-modules': './src-css-modules/App',
  },
  output: {
    path: path.resolve(__dirname, 'dist'),
    filename: '[name].bundle.js',
  },
  optimization: { noEmitOnErrors: true },
  plugins: [
    new webpack.DefinePlugin({
      'process.env': { NODE_ENV: JSON.stringify(process.env.NODE_ENV) },
    }),
    new MiniCssExtractPlugin({ filename: 'styles-css-modules.css' }),
    new HtmlWebpackPlugin({
      filename: 'css-modules.html',
      title: 'css-modules benchmark',
      template: path.resolve(__dirname, 'src/template.html'),
    }),
  ],
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: [{ loader: 'babel-loader' }],
      },
      {
        test: /\.css$/,
        use: dev
          ? [
              'css-hot-loader',
              MiniCssExtractPlugin.loader,
              {
                loader: 'css-loader',
                options: { sourceMap: dev, modules: true },
              },
            ]
          : [
              MiniCssExtractPlugin.loader,
              {
                loader: 'css-loader',
                options: { sourceMap: dev, modules: true },
              },
            ],
      },
      {
        test: /\.(png|jpg|gif|svg)$/,
        use: [{ loader: 'file-loader' }],
      },
    ],
  },
  devServer: {
    historyApiFallback: true,
    publicPath: '/dist/',
    contentBase: path.join(__dirname, 'public'),
    compress: true,
    port: 8080,
  },
};