React 19's useActionState and useFormStatus let me delete the loading flags, error state, and controlled inputs I hand-wrote in every form. Before and after code.
Tailwind v4 dark mode: why your theme flashes white on load, the blocking script that fixes it, and the color-scheme line that saves your scrollbars.
I hid a runtime bug behind an as cast for three weeks. Here's how TypeScript's satisfies operator checks objects without widening them, and when to…
I finally moved a production app from the Next.js Pages Router to the App Router. The real data-fetching and layout rewrite, plus what annoyed me.
How I replaced hand-rolled optimistic UI code with React 19's useOptimistic hook. Real patterns, gotchas from two weeks of production, and when to skip it.
I moved my marketing site from Next.js to Astro islands and cut the JavaScript bundle by 91%. Here's the partial hydration setup I actually ship…
I broke a React app twice in one week because an error boundary never fired. Here's the setup I actually ship in 2026 with react-error-boundary…
After two years shipping both Zustand and Redux Toolkit in React apps, here's how I actually decide, plus the migration path most teams miss.
I moved a Next.js app from Tailwind v3 to v4 on a Sunday. Here's what the @theme block, the Oxide engine, and the one migration…
I turned on the React Compiler in a real Next.js app, deleted a pile of useMemo and useCallback, and watched what broke. Honest field notes…