webpack.config.js

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

module.exports = (env) => {
  const isProduction = env.NODE_ENV === 'production';
  const dotenvFilename = '.env';

  return {
    entry: './src/index.tsx',
    mode: isProduction ? 'production' : 'development',
    devtool: isProduction ? 'source-map' : 'inline-source-map',
    devServer: {
      static: './dist',
      open: true,
      historyApiFallback: true,
    },
    module: {
      rules: [
        {
          test: /\.(ts|tsx)$/,
          exclude: /node_modules/,
          use: {
            loader: 'babel-loader',
            options: {
              presets: ['@babel/preset-env', '@babel/preset-react'],
            },
          },
        },
        {
          test: /\.css$/,
          use: ['style-loader', 'css-loader', 'postcss-loader'],
        },
        {
          test: /\.(png|svg|jpg|jpeg|gif)$/i,
          type: 'asset/resource',
        },
      ],
    },
    resolve: {
      extensions: ['.js', '.jsx', '.ts', '.tsx'],
      fallback: {
        crypto: require.resolve('crypto-browserify'),
      },
    },
    plugins: [
      new HtmlWebpackPlugin({
        template: './src/index.html',
      }),
      new Dotenv({
        path: dotenvFilename,
        systemvars: true
      }),
      new webpack.DefinePlugin({
        'process.env.NODE_ENV': JSON.stringify(env.NODE_ENV),
      }),
    ],
    output: {
      filename: 'bundle.js',
      path: path.resolve(__dirname, 'dist'),
      clean: true,
      publicPath: '/',
    },
  };
};