webpack.common.js

const path = require("path");
const webpack = require("webpack");
const TerserPlugin = require("terser-webpack-plugin");

module.exports = {
  entry: "./client/src/index.js",
  output: {
    filename: "opentable.js",
    path: path.resolve(__dirname, "public"),
  },
  module: {
    rules: [
      {
        test: /\.?js$/,
        exclude: /node_modules/,
        use: {
          loader: "babel-loader",
          options: {
            presets: ["@babel/preset-env", "@babel/preset-react"],
          },
        },
      },
    ],
  },
  resolve: {
    fallback: {
      // make sure you `npm install path-browserify` to use this
      crypto: require.resolve("crypto-browserify"),
      stream: require.resolve("stream-browserify"),
      buffer: require.resolve("buffer"),
    },
  },
  plugins: [
    // fix "process is not defined" error:
    // (do "npm install process" before running the build)
    new webpack.ProvidePlugin({
      process: "process/browser",
    }),
    new webpack.ProvidePlugin({
      Buffer: ["buffer", "Buffer"],
    }),
  ],
  optimization: {
    minimizer: [
      new TerserPlugin({
        extractComments: false,
      }),
    ],
  },
};