I am wondering what is the built-in standard for validating custom fields in Toolset? Both, by adding a post in the admin area and by using the form in the frontend, I wanted to know what are the preset validations used for the fields are, and if I can edit them at all?
For example, for the number custom field, there are many ways to input a phone number so I want to make it only one way - IE 18008008000 , 1800-800-8000 , 1800.800.8000 - I am trying to minimalize anomalies in the system so I would like one main validating method for each field.
The field validation is a mix of JavaScript and server-side validation, depending on whether you are editing posts in the back end or with a front-end form, but there is no possibility to modify the built-in validation, the patterns for which are effectively hard-coded.
If you want an alternate form of validation you should not select validation in the custom field settings, and then apply your own custom validation.
On the back-end post edit screens you would need to use the core WP hooks for back-end validation and could enqueue your own custom JS to provide inline validation.
We do have an existing feature request to add flexibility to Toolset's in-built validation, and I'll add this thread to that internal ticket to add your voice to the request.
