What are the best practices for securing a Node.js application?

What are the best practices for securing a Node.js application?

To secure a Node.js application, you should follow these best practices: use environment variables for sensitive data, validate user input, implement proper authentication and authorization, keep dependencies updated, and use security headers.

Can you explain how to validate user input?

Validating user input involves checking the data received from users to ensure it meets certain criteria. You can use libraries like Joi or express-validator to define schemas and validate incoming data.

What are some common security vulnerabilities in Node.js?

Common vulnerabilities include SQL injection, cross-site scripting (XSS), and insecure deserialization. It's crucial to be aware of these and implement measures to prevent them.

How can I keep my dependencies updated?

You can use tools like npm-check-updates or dependabot to automatically check for and update outdated dependencies in your Node.js application.