In order to add a PDF-Function there are several files that need to be changed. If the function is on the backend only, or on only on the frontend, you just need to add it to one of the locations. If it is available on both, you need to update both locations.
Dependency Injection is used to accomodate for different imports across platforms.
Backend functions can have different implementations than their frontend counterparts if neccesary. Otherwise they can just link to their frontend implementation.
Registering functions will also pass them their dependencies for the specific target platform (Node, Browser)
