Why do we need UI frameworks if there are hbs, pug or ejs?

Question

Frontend

Hello, I am a beginner programmer. At the moment I am writing on React js, but I came across a backend, and I saw such engines as HBS, PUG there. As I understand it, they are needed in order to make the frontend parts in the backend. My question is why do we need UI frameworks like React js, Angylar, if there is HBS, PUG? I'll tell you right now that you don't piss me off. Yes, this is the dumbest question.

Answer 1

As I understand it, they are needed in order to make the frontend parts in the backend.

You misunderstood. Template engines just simplify the logic of generating html by the backend, but have no direct relation to the frontend and generally nothing to dynamic interfaces.