What are the best practices for using express-validator?

What are the best practices for using express-validator in my Node.js application?

Some best practices include validating inputs early, using custom validators, and organizing your validation logic.

Can you give me an example of how to use custom validators?

Sure! You can create a custom validator like this: check('email').custom(value => { if (!isValidEmail(value)) { throw new Error('Invalid email'); } return true; });.

How do I handle validation errors effectively?

You can handle validation errors by using middleware to catch errors and send a structured response back to the client.

Is it possible to validate nested objects?

Yes, you can validate nested objects using the check method with dot notation, like check('user.name').notEmpty().