The DOM element associated with the field, or null
if there's no associated element.
The accessor that reads and writes the field value from and to targetElements.
The array of elements that are used to derive the field value, includes element.
Associates the field with the DOM element.
Returns a callback that associates the field with the DOM element under the given key. The same callback is returned when this method is called with the same key.
The key for which the reference callback must be returned. To associate multiple elements with the same field, use different keys.
The plugin added to fields by the uncontrolledPlugin.