Regex for Form Validation and Data Scraping
Build safer JavaScript regex patterns with explicit input rules, adversarial test cases, bounded validation, and parser-based extraction for structured data.
Daniel KimuseMemo vs useCallback vs React.memo: Fewer Rerenders
Learn when React memoization helps, how prop identity affects rerenders, and why profiling and state placement should come before useMemo and useCallback.
Daniel KimConvert JSON to TypeScript Types Automatically
Turn API JSON into useful TypeScript interfaces, validate unknown responses at runtime, and build a repeatable workflow that catches contract changes.
Daniel KimHow to Fix React Hydration Errors in Next.js
Diagnose React hydration mismatches by comparing server output with the first client render, then fix nondeterministic values, browser state, and invalid markup.
Daniel KimDeep Copy in JavaScript: structuredClone vs Spread
Understand when spread is enough, when structuredClone creates a useful snapshot, and why targeted immutable updates often beat cloning an entire object graph.
Daniel KimrequestAnimationFrame Delta Time for Smooth Motion
Use requestAnimationFrame timestamps and delta time for consistent motion, handle background tabs, and stop animation loops cleanly without tying speed to refresh rate.
Daniel KimWeb Animations API: Play, Pause, Reverse and Cancel
Control animation playback with Element.animate(), handle finished promises and cancellation, and keep real component state separate from temporary animation effects.
Sofia MarchettiSvelteKit vs Next.js: Choosing a Full-Stack Framework
Evaluate SvelteKit and Next.js through data loading, forms, component reuse, authentication boundaries, and deployment needs using a realistic full-stack prototype.
Sofia MarchettiIntersection Observer Lazy Loading and Scroll Effects
Use IntersectionObserver to load optional content and trigger one-time reveals without scroll polling. Configure roots, margins, thresholds and cleanup safely.
Daniel Kim