Chained Dropdown Lists

How can create chained multiple dropdown list on Panel like above linked samples?

I think the question is how to add classes to the select options, because this is how the plugin works.

I think this can’t be done with the default select field type, but only with a custom form field.

I just wonder that kirby has chain feature or not. So i guess have to create custom field :smile:

Thanks @flokosiol