What to learn besides HTML, CSS and JS to become professional web developer in 2018?

Question

What to learn besides HTML, CSS and JS to become professional web developer in 2018?

Answer 1

Web developer means both
Front end (html css and js)
Backend(sql and other database management)
Also there is lot of framework which are basically tools for making your task easy.

Answer 2

You can also learn PHP for back-end web developer!!😊