What are the best practices for input validation?

What are the best practices for input validation?

The best practices for input validation include using whitelists, validating on both client and server sides, and providing clear error messages.

Can you explain why whitelisting is preferred over blacklisting?

Whitelisting is preferred because it only allows known good inputs, reducing the risk of malicious data being accepted.

What tools can I use for input validation?

You can use libraries like Joi for Node.js, or built-in validation features in frameworks like Django or Laravel.

How can I ensure my validation is secure?

To ensure security, always validate inputs on the server side, sanitize data, and keep your validation logic updated.