Posts tagged “App Router”
7 posts found
Next.js forbidden() and unauthorized() in App Router: Replacing Redirect-Based Auth Guards With Semantic HTTP Responses
October 8, 2026
Most Next.js authentication patterns fail silently by redirecting users instead of returning proper HTTP status codes. Learn how forbidden() and unauthorized() replace middleware redirects with semantic responses that work correctly for browsers, crawlers, and API clients.
Next.js Typed Routes in 2026: Enabling typedRoutes Experimentally and What It Catches That TypeScript Alone Misses
October 7, 2026
The experimental typedRoutes flag prevents route string errors that TypeScript cannot see. Learn what it generates, what it catches, and when it fails to help.
Next.js useRouter vs redirect vs permanentRedirect in App Router: Choosing the Right Navigation Primitive
September 10, 2026
Master Next.js App Router navigation by understanding when to use useRouter, redirect, and permanentRedirect. Learn the technical differences, performance implications, and real-world patterns that prevent runtime crashes and SEO penalties.
Next.js 15 Caching: What Changed and Why
May 22, 2026
Next.js 15 reversed aggressive caching defaults. The new opt-in model, use cache directive, and revalidation APIs change how production apps handle data freshness and performance.
Next.js Intercepting Routes: Modal Patterns Done Right
May 20, 2026
Most modal implementations break the browser's back button and lose state on refresh. Next.js intercepting routes solve both problems through file-system conventions that map URLs to overlays.
Next.js Parallel Routes: Build Complex Layouts
May 19, 2026
Most dashboard layout problems stem from forcing sequential rendering when parallel composition is needed. Learn how Next.js parallel routes solve complex layout patterns that break with traditional approaches.
Next.js App Router: Layouts vs Templates Explained
May 17, 2026
Most Next.js routing problems stem from choosing the wrong wrapper component. Learn exactly when to use layouts versus templates, and why the distinction matters for state persistence and performance.