It installs the React library into your project using npm.

npm install react

It adds React into your project inside node_modules.

• react - core library
• react-dom - for web rendering

import React from "react";
import ReactDOM from "react-dom/client";

function App() {
  return <h1>Hello React</h1>;
}

const root = ReactDOM.createRoot(document.getElementById("root"));
root.render(<App />);