Boss-CSS: I created another "CSS-in-JS" lib, and here is why!

Boss-CSS is a polymorphic "CSS-in-JS" library supporting multiple different ways of applying CSS to your codebase, with or without runtime. Before I get into the details there are a few things I want to clarify. I'm not a content creator or writer, and I don't want to be. For this reason, this will be one single, detailed, long ass post . I'll try to explain and justify the choices I made inspired by my past experiences. It'll also serve as some sort of initial documentation. In case you want to read about the library itself and skip its history, jump here: Boss CSS History I'm coding mostly for web for 22 years now, and for 17 professionally. I've used several different ways to do CSS, using all kinds of frameworks, methodologies, different styling solutions, compilers and architectures. We always change for the better, trying to overcome the problems our previous solution suffered from. But this doesn't mean the new solution performs better in all areas, always leaving a gap behind.