webpack.config.js

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

module.exports = {
  mode: 'development',
  devtool: 'eval-source-map',
  module: {
    rules: [
      {
        test: /\.(js|jsx|ts|tsx)$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: ['@babel/preset-env', '@babel/preset-react'],
            plugins: ['@babel/plugin-proposal-nullish-coalescing-operator'],
          },
        },
      },
    ],
  },
  plugins: [
    new webpack.ProvidePlugin({
        Buffer: ['buffer', 'Buffer'],
    }),
  ],
  resolve: {
    extensions: ['.ts', '.tsx', '.js', '.jsx'],
    fallback: {
      "crypto": require.resolve("crypto-browserify"),
      "process": require.resolve("process/browser"),
      "stream": require.resolve("stream-browserify"),
      "buffer": require.resolve("buffer/")
    }
  },
};