webpack.config.js

const path = require('path');
const webpack = require('webpack');

const shared = {
  mode: 'production',
  plugins: [
    new webpack.DefinePlugin({
      'process.env.NODE_ENV': JSON.stringify('production'),
    }),
    new webpack.ProvidePlugin({
      process: 'process/browser',
    }),
  ],
  resolve: {
    fallback: {
      // Only polyfill what we actually need
      path: 'path-browserify',
      // Disable everything else
      fs: false,
      'fs-extra': false,
      child_process: false,
      net: false,
      tls: false,
      os: false,
      crypto: false,
      stream: false,
      util: false,
      url: false,
      querystring: false,
      http: false,
      https: false,
      zlib: false,
      assert: false,
      buffer: false,
      events: false,
      timers: false,
      string_decoder: false,
      constants: false,
      vm: false,
    },
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: ['@babel/preset-env'],
          },
        },
      },
    ],
  },
  target: 'web',
  optimization: {
    minimize: true,
  },
};

// UMD bundle (self-contained, all dependencies bundled)
const umd = {
  ...shared,
  entry: './src/index.js',
  output: {
    filename: 'index.js',
    path: path.resolve(__dirname, 'dist'),
    library: 'validate',
    libraryTarget: 'umd',
    globalObject: 'this',
  },
};

// ESM bundle (self-contained, all dependencies bundled)
const esm = {
  ...shared,
  entry: './src/index.js',
  output: {
    filename: 'index.mjs',
    path: path.resolve(__dirname, 'dist'),
    library: {
      type: 'module',
    },
  },
  experiments: {
    outputModule: true,
  },
};

module.exports = [umd, esm];