Where should ReactDOM be imported from?

After upgrading to version 0.14.2, I see an error and recommendation to use ReactDOM.render() instead of React.render(), but whence do I import it?

When I don't import it and just running as it is, it shows it as undefined. Is it a built-in functionality or is it a 3rd party library?

With the new update, all the DOM stuff you do should be done with ReactDOM instead of React. It's a separate module.

Do npm install react-dom and then, if you're using ES6, you can do:

import ReactDOM from 'react-dom';

or if you're using ES5 you can just do:

var ReactDOM = require('react-dom');

and then you can use ReactDOM.render(), ReactDOM.findDOMNode(), etc in your code.

if you are using the latest version of react (v18 onwards), the react and react statement has been updated. Earlier (till v17.0.2 ) it was:

import React from 'react';
import ReactDOM from 'react-dom';

currently (since v18.0.0 ) it is:

import { React } from "react";
import { createRoot } from "react-dom/client";