NextJS:layout.js
A layout is UI that is shared between routes.
Example
app/shop/[tag]/[item]/layout.tsx File:
export default function ShopLayout({
children,
params,
}: {
children: React.ReactNode
params: {
tag: string
item: string
}
}) {
// URL -> /shop/shoes/nike-air-max-97
// `params` -> { tag: 'shoes', item: 'nike-air-max-97' }
return <section>{children}</section>
}