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.