What can i learn after finishing html, css n js.... Where to next????

Question

as above

Answer 1

php

Answer 2

Design a responsive and elegant website.
Make it your project.

Answer 3

jQuery, PHP or SQL if you want to make more with web languages. Also it's interesting to work with Angular.js and Ajax later, but this are a extensions for JavaScript and

For Angular.js and Ajax:
https://www.w3schools.com/

Or just make some Websites.