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Notes & Essays

Practical notes on React, Next.js, Vue, product UI, and shipping reliable software across health-tech and logistics.

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ReactJS & TypeScript· SEP 2026· 17 min read
React Frontend Systems
Working implementations of debounce, abortable fetch, backoff polling, and windowed lists — plus the JavaScript event loop and React engine that decide whether those patterns actually hold.
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More writing

09 posts
React
5 min read
What React Fiber Actually Does
Forget the engine. Picture a search box and a 2,000-row list. Fiber is why the letters can appear now while the slow list is allowed to catch up.
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ReactNext.js & Security
4 min read
Why This Site's Intro Replays After You Close the Tab
A home-only overlay, sessionStorage (not localStorage), useSyncExternalStore, and Motion's AnimatePresence — with the hero painted underneath so LCP is not gated on the intro.
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React
5 min read
Compound Components with Context
Share state across related UI pieces without prop wiring — and when a single component or shadcn is still the better choice.
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React
2 min read
useEffect vs useLayoutEffect – When to Use Each
Both run after render, but timing decides whether the user sees a flicker. Start with useEffect; reach for useLayoutEffect only when you must measure or sync layout before paint.
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React
3 min read
How React Reconciliation Works
Reconciliation is how React compares the next UI tree with the previous one so it can update the real DOM as little as possible.
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React
3 min read
How to Prevent Unnecessary Re-renders in React
Re-renders are normal. Unnecessary ones usually come from unstable props, broad state, or overused context — fix the cause before sprinkling memo everywhere.
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React
3 min read
Controlled vs Uncontrolled Components
Controlled inputs keep form data in React state. Uncontrolled inputs keep it in the DOM. Prefer controlled for app forms; use uncontrolled for simple cases and file inputs.
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React
3 min read
memo, useMemo, and useCallback Explained
memo caches a component, useMemo caches a value, useCallback caches a function. Use them together when prop identity matters — not on every line of code.
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