The list of available build-in validators is quite thin: https://documentation.magnolia-cms.com/display/DOCS61/Field+validators#Fieldvalidators-Listofvalidatordefinitionclasses
I get that the idea is to leverage the power of the regex validator, but most of us are neither proficient enough in regex or have the time to write a reliable regexpression for a lot of use cases. Thus i think there should be a build in validator for the most common cases:
- valid Number? (either decimal or fraction)
- valid URL? (either with or without https)
- valid Phonenumber? (one could use libphonenumber for that)
im sure one can come up with more...
Maybe this would make a great magnolia-module, which sole purpose would be to provide validators. Maybe for more complex stuff like adresses or user names.