The [middleware](https://nextjs.org/docs/middleware) is a [new feature in Next.js v12](https://nextjs.org/blog/next-12#introducing-middleware), currently not supported by the Next.js SDK. The [release blog post](https://nextjs.org/blog/next-12) says it's in beta, but the [middleware docs](https://nextjs.org/docs/middleware) aren't that specific and don't say whether it's a prerelease. what to cover: - [x] Error tracking - [x] Performance monitoring
The middleware is a new feature in Next.js v12, currently not supported by the Next.js SDK. The release blog post says it's in beta, but the middleware docs aren't that specific and don't say whether it's a prerelease.
what to cover: