📰 Dev.to · Ashish Kumar

How Meta StyleX compiles JS-authored styles into atomic static CSS: less runtime injection, smaller bundles, and why that matters for huge apps.

React error boundaries use class lifecycles, not hooks: what render errors they catch, what async and event errors they skip, and how to structure fallbacks.

Redux vs Zustand vs Jotai vs Valtio — centralized, atomic, and proxy React state. When each wins on scale, subscriptions, and code simplicity.

Live traffic in Google Maps: how probe data, graph routing, Waze-style reports, and historical speed curves combine to show jams and update ETAs at huge scale.

At 60Hz the browser has ~16.6ms per frame for JS, layout, and paint. Why load scores miss jank and what it means for trading and live data UIs.

Browsers share one CSS model; Figma uses WASM and GPU shaders. Where design-to-code breaks: radius, strokes, blur, gap, and what to verify before you build.

Why streaming apps go black on screen capture: EME, CDMs, Widevine L1 vs L3, and the secure compositor paths that keep decrypted frames off the capture surface.

Parse → DOM → CSSOM → Layout → Paint → Composite. What the main thread actually does each frame, what jank physically is, and how to stop causing it.