In a NestJS application, how should you correctly import and apply the Helmet middleware in main.ts?

easy📝 Syntax Q3 of 15

NestJS - Middleware

In a NestJS application, how should you correctly import and apply the Helmet middleware in main.ts?

Aimport helmet from 'helmet'; app.use(helmet);

Bimport * as helmet from 'helmet'; app.use(helmet);

Cconst helmet = require('helmet'); app.use(helmet);

Dimport helmet from 'helmet'; app.use(helmet());

Step-by-Step Solution

Solution:

Step 1: Import Helmet correctly
Use ES module default import: import helmet from 'helmet';
Step 2: Apply Helmet as middleware
Call the function to get middleware: app.use(helmet());
Final Answer:
import helmet from 'helmet'; app.use(helmet()); -> Option D
Quick Check:
Helmet must be called as a function to return middleware [OK]

Quick Trick: Always call helmet() when applying middleware [OK]

Common Mistakes:

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