What frameworks are top web applications written on?

Question

Web development

Who knows the people, or will give a link to the article, on the issue of what was used when writing projects such as YouTube, VK, Google, Wordpress, Insta and many other top. It is many more. Is there a table of what was used on Layout, Frontend and Backend, and for mobile applications, the same. There must be an article. And in general, why on the aforementioned sites, besides jquery, there is almost nothing, even bootstrap did not seem to find it.

Answer 1

Why should top companies use template tools when they can afford to develop them themselves?
https://code.facebook.com/projects/
https://opensource.google.com/projects/explore/featured
https://github.com/yandex
https://github.com/vkcom
https://github .com/collections/open-source-organiz... You
can track here, for example:
https://www.wappalyzer.com/technologies