Next.js 15 Tutorial, Beginner to Advanced (Codevolution)

Codevolution's Next.js 15 course, 92 concise lessons and about 7 hours, built entirely on the modern App Router. It covers project structure, routing, nested and dynamic routes, catch-all segments, not-found pages, private folders, route groups, layouts, metadata, Link and active links, params and searchParams, templates, loading and error UI, parallel and intercepting routes. Route handlers are taught with GET, POST, PATCH and DELETE, query parameters, headers, cookies, redirects, caching and middleware. The rendering section explains CSR, SSR, React Server Components, static and dynamic rendering and streaming, followed by data fetching, server actions with useFormStatus and useActionState, optimistic updates, Clerk authentication with role-based access, and deployment to Vercel.