NestJS Basics#10 - Interceptors in NestJS

The path to aspect-oriented programming

Welcome to Part 10 of the NestJS Basics course.

In the previous post, we looked at the middleware functions in NestJS. The main topics were as follows:

• What is a middleware function?

• How to apply a NestJS middleware function?

  • method-level

  • route wildcards

  • excluding routes

  • multiple middleware functions

• Class-based middleware to functional middleware

• Global middleware

If you haven’t gone through it yet, you can check out the post on the NestJS Middleware below:

NestJS Basics#9 - NestJS Middleware Functions

In today’s post, I’m going to cover the topic of interceptors in NestJS.

The Plan

Here are the things we will cover in this post.

• What is a NestJS interceptor?

• Understanding the concept of Aspect-Oriented Programming

• Creating a NestJS Interceptor

• Binding the Interceptor

  • controller-scoped

  • method-scoped

  • global-scoped

As usual, every step will be accompanied by appropriate code examples.

Let’s begin.