Custom Fields Validation

I'd love to have selectable types of validation for custom fields I create.

something like this:


For instance, I'd like to set textbox fields that I create to store quantities to be numeric only.

Perhaps the built in Joomla form validation could be used to do this:
docs.joomla.org/Client-side_form_validation

Here's a list of the types of validations that would be handy:
Is Numeric
Is Valid Date
Is Integer
Is Float
Is Positive Value
Is Negative Value
Is Valid Email


I'd be more than happy to help with testing/development of this facility if you choose to develop it.

All the best