Modern frontend and full-stack JavaScript frameworks for building web applications.
The App Router is not a new folder structure — it moved your app's default home from browser to server. What that means, what broke, and when to migrate.
A server component runs once, on the server, and ships its output instead of JavaScript. What that really means, when to use one, and where it will hurt.
Error boundaries are blast-radius design. What React catches and what it misses, error.tsx granularity, retries that actually work, and honest fallbacks.
Server Components shrank the state debate. How to sort server data, UI state, shared state and URL state — and when Zustand, Redux or Context actually fits.
