The DOM element which constraints are tracked, or null if there's no associated element.
Readonlyistrue if this field has a validity issue, or false otherwise.
The copy of the last reported validity state read from the validated element.
Returns all invalid fields.
Shows error message balloon for the first element that is associated with this field or any of its child fields, that has an associated error via calling reportValidity.
A field for which validity was reported, or null if there are no invalid fields.
The mixin added to fields by the constraintValidationPlugin.