webpack.config.js

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

module.exports = {
  entry: './src/index.js',
  output: {
    chunkFilename: '[id].js',
    filename: 'bundle.js',
    path: path.resolve(__dirname, 'dist'),
    publicPath: '',
  },
  resolve: {
    modules: ['src', 'node_modules'],
    extensions: ['.js', '.jsx'],
  },
  context: path.resolve(__dirname, './'),
  devtool: 'eval-source-map',
  module: {
    rules: [
      {
        test: /\.js$/i,
        exclude: /node_modules/,
        loader: 'babel-loader',
      },
      {
        test: /\.css$/i,
        use: [
          { loader: 'css-hot-loader' },
          { loader: MiniCssExtractPlugin.loader },
          {
            loader: 'css-loader',
            options: {
              localsConvention: 'camelCase',
              modules: {
                context: path.resolve(__dirname, 'src'),
                hashPrefix: 'my-custom-hash',
                localIdentName: '[name]__[local]--[hash:base64:5]',
                mode: 'local',
              },
              sourceMap: true,
            },
          },
        ],
      },
    ],
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: __dirname + '/index.html',
      filename: 'index.html',
      inject: 'body',
    }),
    new MiniCssExtractPlugin({
      filename: '[name].css',
    }),
  ],
};