Upgrade to React 18

Upgrading an existing React application to version 18 only requires two steps.

Step 1: Install React 18

To install the latest version, from your project folder run the following from the terminal:

Step 2: Use the new root API

In order to take advantage of React 18's concurrent features you'll need to use the new root API for client rendering.

// Before
import ReactDOM from 'react-dom';
ReactDOM.render(<App />, document.getElementById('root'));

// After
import ReactDOM from 'react-dom/client';
const root = ReactDOM.createRoot(document.getElementById('root'));
root.render(<App />);