Uploaded August 2022 | Updated September 2026, 1 week ago

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How to Add New Middleware Feature with Next.js 12.2 In Application - For Beginners
Hey everyone welcome back to daily tuition.
Released in October 2021 (Next.js 12.0) and has been in beta since then, Next.js Middleware is now stable. This release includes many breaking changes to the APIs.

In this lecture, we gonna talk about the changes that have been made with middleware.

You can start upgrading your Middleware usage today with the latest release (npm i next@latest).

Make sure you have the next 12.2 or later installed.

Previously, you could create a _middleware.ts file under the pages directory at any level. Middleware execution was based on the file path where it was created.

In the latest version,
You should declare one single Middleware file in your application, which should be located next to the pages directory and named without an _ prefix. Your Middleware file can still have either a .ts or .js extension.

Middleware will be invoked for every route in the app

Define a single Middleware file next to your pages folder
No need to prefix the file with an underscore
A custom matcher can be used to define matching routes using an exported config object

So let's understand how to use it.

If you want to learn next.js from the beginning here is the link:

Next.js Complete Course For Beginners
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Tailwind CSS Complete Course
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How to Make Blog Website with Next.js & Tailwind CSS - For Beginners
youtu.be/1T3GF6endl8

Javascript Complete Course
youtu.be/LlMCaEK9PLg

⏱️ Timestamps ⏱️
0:00 - Introduction
0:28 - Getting Started with Middleware
4:41 - Matcher
6:13 - Authentication
6:46 - Cookies
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Tags: #nextjs #howto #programming