React no longer needs to include it?

Question

JavaScript

I’m watching a 2020 course on React and there, when a person was making one of the components, he got an error and had to write:
import React from 'react';
But at the same time, when I didn’t write it, everything worked.
As I understand it, there was an update and the need to add was removed? Or is it still better to prescribe in the code just in case:
import React from 'react';

Answer 1

if some hooks are not used, for example useState, or useEffectthen you can not connect

Answer 2

Most likely you have React loaded on an HTML page (as in the picture below), in which case you do not need to import it as a module.

Another way to connect is to install the react library via npm and import it in code. Everything is written about this in the React docks, I advise you to watch them, and not videos, especially since there is a Russian language there.
import React from 'react';