[Solved] Which of the following is the correct syntax to create a custom RolesGuard in NestJS? — Ans: export class RolesGuard implements CanActivate { canActivate(context:... | NestJS

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Which of the following is the correct syntax to create a custom RolesGuard in NestJS?

Aexport const RolesGuard = () => { /* logic */ }

Bexport function RolesGuard() { return (req, res) => { /* logic */ } }

Cexport interface RolesGuard { canActivate(): boolean }

Dexport class RolesGuard implements CanActivate { canActivate(context: ExecutionContext) { /* logic */ } }

Step-by-Step Solution

Solution:

Step 1: Recall NestJS guard syntax
Guards are classes implementing CanActivate with canActivate method.
Step 2: Check options for this pattern
Only export class RolesGuard implements CanActivate { canActivate(context: ExecutionContext) { /* logic */ } } defines a class implementing CanActivate with canActivate method.
Final Answer:
Class implementing CanActivate with canActivate method -> Option D
Quick Check:
Custom guard syntax = class with canActivate [OK]

Quick Trick: Guards are classes implementing CanActivate interface [OK]

Common Mistakes:

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Which of the following is the correct syntax to create a custom RolesGuard in NestJS?