How to fix Webpack: Bundle.js – Uncaught ReferenceError: process is not defined error with JavaScript?

To fix Webpack: Bundle.js – Uncaught ReferenceError: process is not defined error with JavaScript, we add the process/browser plugin into the Webpack config.

To do this, we write

const webpack = require("webpack");

module.exports = {
  //...
  plugins: [
    new webpack.ProvidePlugin({
      process: "process/browser",
    }),
  ],
};

to add the process/browser plugin with the ProvidePlugin constructor in webpack.config.js.

We also need to require webpack with require.