Remixed: The Future of Forms

A lot of these libraries are enabling RPC, which is a way to basically define a function within like colo colo. The spelt kit does their own version with a separate file. It's great that it allows developers to co-locate their display logic with their back end logic. But again, if you don't understand the fundamentals, you may not understand that in this one same file, you have front end code and back end code.