Utilities for dealing with form controls in the DOM.
This is a collection of methods that assist in dealing with form controls. They provide ways to focus, serialize, disable/enable or extract current value from a specific control.
Note that nearly all these methods are available directly on
textarea elements. Therefore, these are equivalent:
Naturally, you should always prefer the shortest form suitable in a situation. Most of these methods also return the element itself (as indicated by the return type) for chainability.
Abstract.TimedObserversubclass that watches for changes to a form field's value. This triggers the callback when the form field's value (according to
Form.Element#getValue) changes. (Note that when the value actually changes can vary from browser to browser, particularly with