webpack < 5 used to include polyfills for node.js core modules by default. This is no longer the case. Verify if you need this module and configure a polyfill for it

To verify if you need a polyfill for a node.js core module in webpack 5, you can check if the module is available in the browser environment. If the module is not available, you will need to include a polyfill for it.

To configure a polyfill for a node.js core module in webpack 5, you can use the `fallback` option in the `resolve` configuration. For example, to include a polyfill for the `fs` module, you can add the following code to your webpack configuration:

resolve: {
  fallback: {
    fs: false
  }
}

This will disable the built-in `fs` module in webpack and include a polyfill for it instead. You can replace `false` with the path to the polyfill module if you have installed one.

Keep in mind that including polyfills can increase the bundle size and affect the performance of your application. Therefore, you should only include the necessary polyfills for your application to work properly.