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Handling "Dynamic href is not Supported in the App Router" Error in Next.js

Why This Error Occurred​

The "Dynamic href is not supported in the App Router" error happens when you try to use a dynamic href with next/link in the app directory.

The new client-side router in Next.js does not use a mapping of dynamic routes to URLs, but rather it leverages the URL directly. This means it doesn't support dynamic href use.

Possible Ways to Fix It​

You need to replace the dynamic href with a direct path in the next/link component. Here's a before and after comparison of what your code should look like:

Before

<Link
  href={{
    pathname: '/route/[slug]',
    query: { slug: '1' },
  }}
>
  link
</Link>

Or

<Link href="/route/[slug]?slug=1">link</Link>

After

<Link href="/route/1">link</Link>

In the revised code, the dynamic part of the href ([slug]) is replaced directly with the actual value (1), which simplifies the href and makes it a direct path.