NestJS · Junior · Question 38 of 75

What is middleware in Nest?

1A decorator for DTOs
2A class that maps database rows to objects
✓Correct answer: A function or class that runs before the route handler with access to request and response, like Express middleware

Explanation

It's configured in a module's configure(consumer) method with consumer.apply(LoggerMiddleware).forRoutes('users').

Further reading

NestJS: Middleware ↗

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