webpack.config.js

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

module.exports = (env, argv) => {
  const { mode } = argv
  const isProduction = mode === 'production'
  return {
    entry: './src/index.js',
    output: {
      path: path.resolve(__dirname, 'dist'),
      publicPath: '/',
      filename: isProduction ? '[name].[contenthash].js' : 'main.js',
      clean: true,
    },
    resolve: {
      extensions: ['.js', '.jsx'],
    },
    module: {
      rules: [
        {
          test: /\.(js|jsx)$/,
          exclude: /node_modules/,
          loader: 'babel-loader',
        },
        {
          test: /\.html$/,
          use: [
            {
              loader: 'html-loader',
            },
          ],
        },
        {
          test: /\.css$/,
          use: [
            {
              loader: MiniCssExtractPlugin.loader,
            },
            'css-loader',
          ],
        },
        {
          test: /\.(svg|png|jpe?g|gif)$/i,
          use: [
            {
              loader: 'file-loader',
            },
          ],
        },
      ],
    },
    plugins: [
      new HtmlWebpackPlugin({
        template: './public/index.html',
        filename: './index.html',
      }),
      new MiniCssExtractPlugin({
        filename: 'assets/[name].css',
      }),
    ],
    devServer: {
      open: true,
      client: {
        overlay: true,
      },
      static: {
        directory: path.join(__dirname, 'dist'),
      },
      compress: true,
      historyApiFallback: true,
      port: 3100,
    },
  }
}