Both React and ReactDOM are available over a CDN.

<scriptcrossoriginsrc="https://unpkg.com/react@18/umd/react.development.js"></script><scriptcrossoriginsrc="https://unpkg.com/react-dom@18/umd/react-dom.development.js"></script>

The versions above are only meant for development, and are not suitable for production. Minified and optimized production versions of React are available at:

<scriptcrossoriginsrc="https://unpkg.com/react@18/umd/react.production.min.js"></script><scriptcrossoriginsrc="https://unpkg.com/react-dom@18/umd/react-dom.production.min.js"></script>

To load a specific version ofreact andreact-dom, replace18 with the version number.

Why thecrossorigin Attribute?

If you serve React from a CDN, we recommend to keep thecrossorigin attribute set:

<scriptcrossoriginsrc="..."></script>

We also recommend to verify that the CDN you are using sets theAccess-Control-Allow-Origin: * HTTP header:

This enables a bettererror handling experience in React 16 and later.