Shared server-side UI that depends on URL information

• Typically, when you have shared UI, you'd put it inside a layout. However, layouts do not receive searchParams and params lower than their segment. This is a challenge for shared UI like breadcrumbs that depends on the URL information.
• For simple cases, you can move the UI to Client Components and use router hooks such as usePathname and useSearchParams.
• This example shows how to use Parallel Routes and a page.js in a catch all route to have pockets of shared UI across your app.
• Try navigating between categories and sub categories. Notice the breadcrumbs can derive URL information.