How to use ReactJS if the application is on RoR?

Question

Ruby on Rails

There is a Ruby on Rails application, front-end on Bootstrap + jQuery, respectively.
Due to def. difficulties, I want to rewrite the front in ReactJS.
Question:
There is a "div" block, it contains a list of links / products, it is necessary for search robots to index it (i.e. rendering is done on the back-end). I want to access it using React and manipulate it. For example: onSubmit, onChange, etc., how can I do this?
In jQuery, I do something along the lines of:

$('div form').submit( function ( event ) {
    event.preventDefault();
    do_something();
});

Is this possible in React? If so, how?
Or do you need to "prepare" blocks on the back-end in order to "pick up" them on the front-end?

Answer 1

Are you sure you even need React? If yes, then either rewrite the entire server side rendering on React, for this you will need an additional node.js server, or implement on React only modules with complex logic that do not need indexing: shopping cart, personal account, checkout, admin panel.