Recently needed to apply a keyup event to a series of textfields during MooTools domready event, but only have each field’s event execute when that field has the user’s focus.
/**
* Custom MooTools event, restricting firing of the keyUp event to only when the target element has focus.
*
* Usage:
* some_element.addEvent('focusedKeyUp', function(event) {
* console.debug('A key was pressed while the following element has focus: ' + event.target.get('id'));
* });
*/
Element.Events.focusedKeyUp = {
base: 'keyup',
condition: function(event) {
return event.target == $$(event.target.get('tag') + ':focus')[0];
}
};
(Source: gist.github.com)
