Why are frameworks needed?

Question

JavaScript

Frameworks are needed in order to speed up writing code and do something that cannot be done in a pure language, but let's take a look at JS for example. js has a mocha framework, but the mocha code is converted to js code, and it actually turns out that what can be done in frameworks can be done in pure js?

Answer 1

and do what cannot be done in a pure language

Yes, you are wrong. Frameworks are designed to speed up and, most importantly, simplify writing code, change its style to a template one, and not add any new features to the language.
And, of course, they are written in JS, and everything that is not written in JS cannot be cooler than itself.

Answer 2

frameworks are needed to speed up development, a lot of ready-made + accustoms to one style, you can immediately create vacancies: knowledge of jQuery, yii, etc.

Answer 3

https://en.wikipedia.org/wiki/Don%27t_repeat_yourself