React 19 Deep Dive: Mastering the Compiler, Actions, and Advanced Hooks
·2096 words·10 mins
If you’ve been writing React for the better part of a decade, you know the drill. You write a component, you realize a child is re-rendering unnecessarily, and you begrudgingly wrap a callback in useCallback or a calculation in useMemo. We’ve spent years micromanaging dependency arrays and fighting the “rules of hooks.”