Even though languages like Javascript and Python aren’t inherently functional, the paradigm behind functional programming can be applied across many contexts. To quote Robert C. Martin–
Paradigms are a way of programming, relatively unrelated to languages. A paradigm tells you which programming structures to use, and when to use them.
Found this cute jewel about functional programming in Javascript, which might resonate with React developers - A Mostly Adequate Guide to Functional Programming. It’s written in a very conversational style with fun examples.
So far, I haven’t found an accessible Python equivalent about FP paradigm except for maybe Steven F. Lott’s book Functional Python Programming but it’s not nearly as entertaining and can get dense (I havent finished it yet).