6 minintermediate
React useEffect Dependencies — The Bug That Keeps Coming Back
Why your effect reads old state, fires twice, or loops forever — and the simple rules to fix it (interview-ready).
Bite-sized JavaScript, React & Next.js tips.
Short posts with code and diagrams. Readable in minutes.
3 minintermediate
React memo vs useMemo vs useCallback — When to Use Which
Three React APIs that all say 'memoize' — but they do different things. Clear explanations, examples, and a cheatsheet.
1 minintermediate
useDeferredValue Explained: Keeping React UIs Responsive
How useDeferredValue works under the hood, when to use it, and how it differs from useTransition.
3 minintermediate
useTransition Explained: Make React Feel Instant
How useTransition works under the hood, when to use it, and how it differs from useDeferredValue.
4 minadvanced
React Fiber Explained: How React’s Engine Actually Works
A deep but clear explanation of React Fiber — the engine that powers modern React rendering and concurrency.
3 minintermediate
React Context Explained: How It Works Under the Hood
Understand what React Context is, how it works internally, and best practices for using it effectively.
2 minintermediate
Why setState Doesn’t Cause Hydration Errors
Understanding why calling setState after hydration doesn’t produce hydration mismatches in React/Next.js.
4 minintermediate
AbortController & AbortSignal
Everything you need to cancel async work in JS: fetch, streams, custom tasks, React patterns, Node notes, timeouts, races, and common pitfalls.