Blogs

Modern authentication feels magical, but it’s built on simple ideas. Browsers remember sessions using cookies, servers store user context, and tokens are just signed proofs of trust. OAuth doesn’t log users in — it safely delegates access, while OIDC adds identity on top. SSO works because all apps trust the same login server, not because they share data.

Fetching data in React has evolved far beyond useEffect. From custom hooks and Suspense to the new use() API in React 19, and powerful libraries like TanStack Query and useSWR

I’ve broken down all Next.js rendering methods — SSG, SSR, ISR, CSR, and PPR — with simple examples in page.tsx. From how Static Site Generation fetches data only at build time (and why it can go stale) to Partial Pre Rendering where static + dynamic content co-exist for speed and freshness.