webpack.prod.js

const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const { CleanWebpackPlugin } = require('clean-webpack-plugin');
const TerserPlugin = require('terser-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const CssMinimizerPlugin = require('css-minimizer-webpack-plugin');

module.exports = {
  mode: 'production',
  entry: './src/index.js',
  output: {
    filename: '[name].[contenthash].js',
    path: path.resolve(__dirname, 'build'),
  },
  optimization: {
    minimize: true,
    minimizer: [
      new TerserPlugin({
        terserOptions: {
          format: {
            comments: false,
          },
        },
        extractComments: false,
      }),
      new CssMinimizerPlugin({
        test: /\.(sass|css|scss)$/,
      }),
    ],
  },
  plugins: [
    new CleanWebpackPlugin(),
    new HtmlWebpackPlugin({
      template: './src/index.html',
      filename: './index.html',
    }),
    new MiniCssExtractPlugin({
      filename: '[name].[contenthash].css',
    }),
  ],
  module: {
    rules: [
      {
        test: /\.(sass|css|scss)$/,
        use: [
          MiniCssExtractPlugin.loader,
          'css-loader',
          {
            loader: 'postcss-loader',
            options: {
              postcssOptions: {
                ident: 'postcss',
                plugins: [require('tailwindcss'), require('autoprefixer')],
              },
            },
          },
          'sass-loader',
        ],
      },
      {
        test: /\.(js|jsx)$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader',
        },
      },
    ],
  },
};