Add validation to a "number field" in a "Configurable List" widget

I added a number text box to the widget, but I want the users to enter positive numbers only. How can I add such validation?

Apologies for any inconvenience, however, I'm afraid it's not possible to set the number field in the Configurable List widget to only accept positive numbers/integers since, unfortunately, there is no way to set minimum or maximum value for that field.

May I suggest you use a drop-down field instead?

To learn more about the widget, please check out this guide: https://www.jotform.com/help/282-How-to-Set-Up-the-Configurable-List-Widget