What is the best way to organize the folder structure for a large application (in particular services)?

Question

JavaScript

I often read different versions of the structure, but I did not manage to understand one point.
There is an application, the structure is modular:

/core/
/app/
     /component/
              /service
               /controller
               /template
               /css

Maybe the question is a little strange, but sometimes I get confused about which methods to put in core and which in component services.
Or is core most commonly used? What about a service directly to a component in rare cases?

Answer 1

I like the approach in which the application is structured by features. I would add app/common to your architecture, where services, directives, etc., common to components, will be stored in folders with the same names (services, directives)