2 min read
React Compiler: can I delete every useMemo?
The compiler memoizes for you — more precisely than hand-written useMemo. When manual memoization still makes sense and how to turn the compiler on.
- #performance
- #compiler
- #hooks
The Journal — practical notes on React
Topic hooks
Clear filter2 min read
useOptimistic: UI that doesn't wait for the server
A like that lights up instantly and a chat message that appears before the server stores it. And if something fails, React rolls it back for you.
- #react-19
- #hooks
- #ux
2 min read
use(): the hook you're allowed to call conditionally
The new use() API reads a value from a Promise or a context. It integrates with Suspense and — uniquely — can be called inside an if.
- #react-19
- #suspense
- #hooks
2 min read
useActionState: forms without the boilerplate
Three useStates for data, error and loading? React 19 does it with one hook — and the form works even before hydration.
- #react-19
- #forms
- #hooks
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