NestJS · Junior · Question 29 of 75

What does a pipe do in Nest?

1Sends logs to a file
2Connects two microservices
✓Correct answer: Transforms or validates handler arguments before the handler runs

Explanation

If validation fails, the pipe throws and the handler isn't called. Built-in pipes include ParseIntPipe, ParseUUIDPipe and ValidationPipe.

Further reading

NestJS: Pipes ↗

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