Ing App Router, struktur folder ing app/ nggawe rute-rute mu — ora ana konfigurasi router sing perlu ditulis. Saben folder minangka segmen URL, lan file-file khusus ing sangisore nggawe apa sing segmen kuwi render.
app/
page.tsx → /
about/page.tsx → /about
blog/page.tsx → /blog
blog/[slug]/page.tsx → /blog/:slug (dynamic segment)
shop/(sale)/page.tsx → /shop (route group — parentheses don't add to URL)
Saben folder bisa ngandhut jeneng-jeneng file sing dipilih, saben siji duwe peran khusus:
page.tsx → the route's UI (REQUIRED to make a segment routable)
layout.tsx → shared wrapper that persists across child routes
loading.tsx → loading UI (auto-wraps the page in <Suspense>)
error.tsx → error boundary for the segment
not-found.tsx→ 404 UI
route.ts → an API endpoint (instead of a page)
// app/blog/[slug]/page.tsx → matches /blog/hello, /blog/anything
export default function Post({ params }: { params: { slug: string } }) {
return <h1>Post: {params.slug}</h1>; // params.slug = "hello"
}
Kurung persegi nggawe parameter dinamis sing dipundut menyang kaca liwat params. Variasi: [...slug] (catch-all), [[...slug]] (optional catch-all).
app/(marketing)/about/page.tsx → /about (the (marketing) folder is ignored in the URL)
Kurung biasa nggawe grup rute kanggo ngatur file utawa nerapake layout beda tanpa nagaruhi URL.
File-based routing nggawe struktur URL jelas saka wit file — ora ana konfigurasi rute pusat sing kudu dirawat lan disejajari.
Ngerti jeneng-jeneng file khusus (page, layout, loading, error, route) lan konvensi kurung ([param], [...catchAll], (group)) minangka basa pokok kanggo mbangun app App Router apa wae.