The What, When, Why And How Of Next.js’ New Middleware Feature

Next.js’ recent 12.0 release included a new beta feature: middleware. For a detailed explanation, you can read all about it in Sam’s previous article, “[Next.js Wildcard Subdomains](https://www.smashingmagazine.com/2021/11/nextjs-wildcard-subdomains/)”. This article, on the other hand, dives into the overall concept of middleware and how handy it can be in building things.