How to handle the previous and next buttons with conditions on card forms?

https://www.jotform.com/answers/1461543-Cards-form-How-to-remove-disable-Previous-button

Unfortunately, it's not possible to conditionally disable, show/hide the next and back buttons with conditions while using card forms. The only button that can be conditionally disabled is the submit button at the very end of the form. 

As a workaround, you may instead show/hide the cards based on conditions. Here's a guide with more details about it: https://www.jotform.com/help/316-How-to-Show-or-Hide-Fields-Base-on-User-s-Answer