How to add data to custom validation rule?

Question

I would like to understand how to add additional data to custom validation rule. I noticed in Magento 2 core files something like the following:

 validator.addRule(
 'validate-customer-company',
 function (value, params, data) {
 return !(data.customer && data['is_company_user']
 },
 $.mage.__('Message')
 ...

Does anyone know where data parameter comes from? In my case value comes from input field, params is true and data is undefined. And the validation is added to company_form.xml like this:

<field name="fieldName">
 ...
 <settings>
 <validation>
 <rule name="custom_rule" xsi:type="boolean">true</rule>
 </validation>
 </settings>

Thanks!

Answer 1

If you want to apply the Validation rules, there are two ways :

By using the UI component, you can use the Magento default rules. By using the Js, you can use Magento's default or create a new customization rule and then use it anywhere you want.