umd build of react v19
react v19 #umd-builds-removed.
But this is a complicate world, some places still use UMD.
- https://unpkg.com/react-umd/dist/react.umd.js
- https://unpkg.com/react-umd/dist/react-dom.umd.js
- https://unpkg.com/react-umd/dist/react-dom-client.umd.js
the MIT License http://magicdawn.mit-license.org