Which things is important for Front-end?

Question

I've been thinking and collecting material, which was found on the Internet to answer this question. But I think that this question that I posted, there are those who will be able to describe everything needed to complete the study of the Front-end.

P. S. If you're the one who was looking for an answer to this question and found it, don't be lazy like.

Answer 1

I think you need to study the basics, but if you go beyond these basics, the user raises the question of what to study him not to make a mistake. So I posted this question to someone more experienced, has shown the right way. We are talking about frameworks, libraries etc related to CSS and JS