Why the separation of server/client side scripts?

[KieronWiltshire]

I'm curious as to why server/client side scripts are separated from one another. It seems rather strange to me to have a login script structured something like this:

 

-> packages

           | -> coolLoginScript

-> client_packages

           | -> coolLoginScript

 

would it not make sense to do something like:

 

-> resources

              | -> coolLoginScript

                               | -> client

                               | -> server

 

or maybe? instead of "resources" use the standard "node_packages"

Edited December 31, 2017 by KieronWiltshire

[rt-2]

Well maybe you'd want different script client side and server side.
For example, for me all the condition are mostly server-side. and the client side script are mostly functions and procedures only.