webpack.config.js

const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');

module.exports = {
  mode: 'development',
  entry: {
    index: './src/index.js',
  },
  devtool: 'inline-source-map',
  devServer: {
    static: './dist',
    historyApiFallback: true,
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: 'src/template.html',
      filename: 'index.html',
    }),
  ],
  module: {
    rules: [
      {
        test: /\.(js|jsx)$/,
        exclude: /node_modules/,
        resolve: {
          fullySpecified: false,
        },
        loader: 'babel-loader',
        options: { presets: ['@babel/preset-env', '@babel/preset-react'] },
      },
      {
        test: /\.css$/,
        use: ['style-loader', 'css-loader', 'postcss-loader'],
      },
    ],
  },
  output: {
    filename: '[name].bundle.js',
    path: path.resolve(__dirname, 'dist'),
    clean: true,
    publicPath: '/',
  },
  optimization: {
    runtimeChunk: 'single',
  },
};