Optional
validateApplies validation rules to a field.
Before marking the field as invalid, check that the validation didn't change.
The field where ValidationPlugin.validate was called.
The options passed to the ValidationPlugin.validate method.
Optional
validateApplies validation rules to a field. If this callback is omitted, then Validator.validate would be called instead.
Before marking the field as invalid, check that the validation didn't change, and wasn't aborted.
The field where ValidationPlugin.validateAsync was called.
The options passed to the ValidationPlugin.validateAsync method.
The validator to which the field value validation is delegated.