javascript framework

Question

What is the best javascript
framework for you? Why ?

Answer 1

None.

Vanilla (pure) JS is the best when you code for the love of programing art... and for learning purpose.
Frameworks could be good in commercial development, or for people who don't love coding, because it could be efficient for quickly build functionnal app/websites, but they need learning both JS basics (at least, but efficient programmers need to learn it deeply) and each frameworks/libraries specifities (also deeply if you want to be really efficient).