[Solved] What is the effect of applying middleware to routes in a NestJS application? — Ans: It intercepts requests to perform actions before reaching the route handler | NestJS

NestJS - Middleware

What is the effect of applying middleware to routes in a NestJS application?

AIt automatically generates API documentation for the routes

BIt intercepts requests to perform actions before reaching the route handler

CIt replaces the route handler with a new function

DIt disables the route from being accessed

Step-by-Step Solution

Solution:

Step 1: Understand Middleware Role
Middleware functions in NestJS act as interceptors that can process requests before they reach the route handler.
Step 2: Analyze Options
It intercepts requests to perform actions before reaching the route handler correctly describes middleware behavior. Options B, C, and D describe unrelated or incorrect behaviors.
Final Answer:
It intercepts requests to perform actions before reaching the route handler -> Option B
Quick Check:
Middleware intercepts requests [OK]

Quick Trick: Middleware intercepts requests before handlers [OK]

Common Mistakes:

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What is the effect of applying middleware to routes in a NestJS application?