TOPIC OVERVIEW

NestJS/Controllers

Controllers receive HTTP requests and decide which part of your application should handle them.

15 QuestionsBeginnerHigh Priority ~9 min read

Controllers are responsible for handling incoming requests in NestJS. You define routes using decorators such as @Get(), @Post(), @Put(), and @Delete(), and then connect those routes to methods that process the request.

Controllers should generally stay focused on handling HTTP concerns rather than containing all of your business logic. That logic is usually moved into providers or services, which keeps your application easier to test and maintain.

What you'll walk away knowing

How controllers map HTTP requests to methods

How route parameters, query parameters, and request bodies are accessed

How controllers work with providers

Why business logic should usually stay outside controllers

1How do you extract route params, query params, and request body in a NestJS controller?Intermediate 2What happens when you inject @Res() into a handler — what side effect should you be aware of?Intermediate 3How does API versioning work in NestJS?Intermediate 4What is the role of a controller in NestJS?Intermediate

All Topics