React Hydration Mismatch: Every Cause and Fix (2026)
August 10, 2026
A React hydration mismatch has a short, documented list of causes. Here is each one, how to find the component responsible, and which fixes actually work.
#react-19
React Compiler Not Memoizing Your Component? Fix It (2026)
July 13, 2026
React Compiler not memoizing your component? Debug the bailout with the Memo badge and Playground, then fix ESLint, Next.js 16, and Vite setup correctly.
React Activity Component Tutorial: Stateful Tabs (2026)
June 12, 2026
Hands-on React Activity component tutorial: preserve tab state with hidden mode, pause effects, and pre-render hidden UI. Runnable React 19.2 code, 2026.
React useEffectEvent Tutorial: Stop Effect Re-Runs (2026)
June 8, 2026
Hands-on React useEffectEvent tutorial: fix stale closures, stop useEffect re-running on prop changes, and migrate from useCallback. Runnable 2026 code.