Is react.js needed in a semi-dynamic site (or in a particular case)?

Question

Node.js

Hello everyone, I'm making a site on node.js + express, layout using bootstrap, made a modal window on the main page for registration, then I actually want that after registration, the page does not reload, but only the panel with signin changes. I see how easy it is to implement in jquery.
Why would I need react in this case?
Do I understand correctly that it is needed only for my dynamic visual components, but for the simple asynchronous behavior of bootstrap and other elements, jquery will be enough for me?
Rather, a slightly different question arose, please explain to me how my specific behavior can be solved using react? descriptively naturally, I do not ask for any code.
thanks for answers

Answer 1

1) React is a functional approach to UI development.
2) React is considered to be V from MVC. It is most commonly used with some kind of flux implementation (MVC is not used).
3) React is based on a virtual DOM
Based on these theses, you need to make the entire application on react (read react + flux), otherwise there is no profit. Accordingly, if you only need to make a login form - discard react, you don't need it.
But if you need to develop a SPA (or even just a site that will have a bunch of UI), then, believe me, with jQ it will all turn into spaghetti seasoned with crutch paste very, very quickly.
PS. React has its own blackjack bootstrap - https://react-bootstrap.github.io/

Answer 2

React, by its concept, is necessary for component management of page content, plus it also has a nice bonus in the form of server rendering of the application, that is, react, like a virus, crawls in one small component, and ends up displaying the entire application using react.

Answer 3

In your case, React can run on the server and already serve it up. JQ only works on the client side.