What is react on fingers?

Question

React

I am engaged in web development, but I can’t understand what this library is and why it is needed, please do not quote the documentation, but show it as simply as possible. I wanted to write a project, but I didn’t understand WHAT CAN I WRITE AT ALL ???

Answer 1

You can write anything. Be it a site with cs:go chests or a cheap ticket search service. The main thing is that React and similar libraries are responsible for the "front" part. Hence the word frontend. For a full-fledged service, you also need a backend.
React makes it easy to write an SPA - that is, a single page application. This is an application that does not require reloading the browser window to browse through different screens.
Without a backend, you can also write a bunch of applications if you use the available APIs.
For example - VK gives you all the information on your photos. You can find the ones that were the most popular (by likes), add sorting by years, filters by 10/100 likes, for example.
If you play dota, you can pull out all your games and plot graphs... (example dotabuff )
Etc.