I spent three years faking a CSS parent selector with useEffect and MutationObserver. Then :has() shipped everywhere. Here's what I deleted and what stayed.
My real Tailwind v3 to v4 migration notes: the utility renames, the CSS-first config, the PostCSS pipeline change, and every place my styles quietly broke.
Tailwind v4 ships container queries as first-class utilities. Here's the @container pattern I now reach for, with before-and-after code from real components.
Six months of React Suspense in production: where I reach for it, where I don't, and the gotchas I wish I'd known before I started…
I dragged my feet on Svelte 5 for nearly a year. Twenty months in, here is what I actually use across runes and snippets, plus…
React 19's useOptimistic hook replaced my hand-rolled optimistic UI: instant likes and messages with automatic rollback. Here's how I use it, with code.
Tailwind CSS v4 moves config into CSS, auto-detects content, and bakes in container queries. Before-and-after code on what changed and what it costs you.
React 19 forms, useActionState, and useOptimistic with before-and-after code. The features I actually kept after upgrading, and the one I'm still careful with.
I've shipped Laravel apps with Livewire, Inertia.js, and a separate React SPA. Here's how I actually choose between them, with code and a few regrets.
Six TypeScript utility types that earn their keep in production, the hand-rolled types they replaced, and the clever ones I stopped using. Real code included.