React 19 Beta – React

This beta release is for libraries to prepare for React 19. App developers should upgrade to 18.3.0 and wait for React 19 stable as we work with libraries and make changes based on feedback. In our React 19 Beta Upgrade Guide, we shared step-by-step instructions for upgrading your app to React 19 Beta. In this post, we’ll give an overview of the new features in React 19, and how you can adopt them

[sotq17]

こんな機能ないのか？とみんなが思ってたやつ

[mizdra]

良さそう

[efcl]

React 19 Betaリリース。 Actionという概念の導入と`useActionState`/`useFormStatus`の追加。 楽観的な更新を扱う`useOptimistic`、Promiseをunwrapする`use`の追加。 Server Component/Server Actionのサポート、`fowardRef`が不要となるように変更。 Hydrationの