[Solved] Why should custom pipes throw exceptions instead of returning error values? — Ans: Throwing exceptions stops request processing and sends proper HTTP error... | NestJS

NestJS - Pipes

Why should custom pipes throw exceptions instead of returning error values?

AExceptions are ignored by NestJS and do not affect flow

BThrowing exceptions stops request processing and sends proper HTTP error responses

CReturning error values is faster and preferred

DReturning error values automatically retries the request

Step-by-Step Solution

Solution:

Step 1: Understand NestJS error handling
Throwing exceptions interrupts the request lifecycle and triggers HTTP error responses.
Step 2: Compare with returning error values
Returning error values does not stop processing and can cause unexpected behavior.
Final Answer:
Throwing exceptions stops request processing and sends proper HTTP error responses -> Option B
Quick Check:
Throw exceptions for validation errors in pipes [OK]

Quick Trick: Throw exceptions to stop invalid requests cleanly [OK]

Common Mistakes:

Master "Pipes" in NestJS

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Why should custom pipes throw exceptions instead of returning error values?