[removed] client-side vs. server-side validation

Question

Which is better to do client side or server side validation?

In our situation we are using

• jQuery and MVC.
• JSON data to pass between our Vi

Answer 1

The benefit of doing server side validation over client side validation is that client side validation can be bypassed/manipulated:

• The end user could have javascript switched off
• The data could be sent directly to your server by someone who's not even using your site, with a custom app designed to do so
• A Javascript error on your page (caused by any number of things) could result in some, but not all, of your validation running

In short - always, always validate server-side and then consider client-side validation as an added "extra" to enhance the end user experience.