A validation widget may be conditionally required based on the evaluation of an expression. As with conditional validation, perform the following steps:
Create a function to test the condition.
Reference the function from the
requiredIfattribute on the widget. The following example tests a Commerce Service Center condition:<dsp:tagAttribute name="requiredIf"
value="atg.commerce.csr.rule0.apply()"/>
This creates a widget that will perform required checks only when the condition applies, but will always perform validation checks when the widget contains data.
