webpack.config.js

const createExpoWebpackConfigAsync = require('@expo/webpack-config');
const webpack = require('webpack')
// Expo CLI will await this method so you can optionally return a promise.
module.exports = async function (env, argv) {
  const config = await createExpoWebpackConfigAsync(env, argv);
  // If you want to add a new alias to the config.
  config.resolve.alias['crypto'] = 'crypto-browserify';
  config.resolve.alias['stream'] = 'stream-browserify';
  config.resolve.alias['process'] = 'process';
  config.plugins.push(new webpack.ProvidePlugin({
    process: "process",
    Buffer: ["buffer", "Buffer"],
  }));
  // Maybe you want to turn off compression in dev mode.
  if (config.mode === 'development') {
    config.devServer.compress = false;
  }

  // Or prevent minimizing the bundle when you build.
  if (config.mode === 'production') {
    config.optimization.minimize = false;
  }

  // Finally return the new config for the CLI to use.
  return config;
};