Is it possible to find a mock-up or a site constructor somewhere to assemble the same site?

Question

Layouts and prototypes

Good afternoon.
I am writing documentation for the project and I really like the site shamansir.github.io/JavaScript-Garden/ru (or its analogues -
developer.mozilla.org, learn.javascript.ru .. )
I also want to make the menu full screen width , scrolling and transitions. I don't have time to write such a website and I'm looking for a similar layout or website builder.
Can someone share the layout

I will be grateful

)

Answer 1

Here are the sources https://github.com/shamansir/JavaScript-Garden