There is an api available in webpack for modules. Unfortunately if you have a universal application that is not built with webpack using that API will break your application. This polyfill allows for limited use of the webpack module API without running your code through webpack. Support functions are:
require.ensure
require.context
require.resolveWeak
NOTE: It is recommended you do NOT use this and instead build your server properly with webpack. Unfortunately it may not always possible to do this because of your project's political or legacy requirements.