YUI Event Utility

    DOM event utilities

3.0.0

    - Added onreadystatechange fork in domready to handle the event in IE when YUI is hosted in an iframe.

    - Added mousewheel support.

    - Added Y.delegate function that is a bit easier to use than Y.on('delegate'...

    - Default scope of mouseenter and mouseleave events is the Node instance to which the listener is attached

    - Default scope of delegated event listeners is the Node instance that matched the supplied CSS selector

    - All special DOM event handlers (focus/blur/mousewheel,resize,delegate,etc) are

      broken down into submodules.  Core DOM event functionality is provided in event-base.js,

      and all of the functionality is rolled into event.js.

    - Additional Safari key remapping.

    - Special DOM events can now be routed through delegate.

    - Y.on can target Node and NodeList references correctly.

    - Fixed onAvailable lazy DOM listener detach handles.

    - When configured to return a detach handle, a single object is always returned.

      Previously requests that resolved to multiple listeners returned an array.

3.0.0beta1

    - DOM event, custom event, and simulate event moved to separate modules.

    - Added an event for DOM event delegation.  It only fires if the target or its descendants

      match a supplied selector.

        Y.on('delegate', fn, el, 'click', 'selector' ...

      The event facade sets the following properties:

        target: the target of the event

        currentTarget: the element that the selector matched

        container: the bound element (the delegation container)

    - Added mouseenter/mouseleave events

        Y.on('mouseenter', fn, el, 'click', 'selector' ...

        Y.on('mouseleave', fn, el, 'click', 'selector' ...

    - Added Y.on('windowresize', fn), which attempts to normalize

      when the event fires across all browsers (once at the end

      of the resize rather than continuously during the resize).

    - Fixed unsubscribeAll return value.

    - Added ability to skip facade creation where performance is a concern.

    - Moved DOMReady core to yui-base.

    - Focus/blur abstraction works in Opera when the bound element is the target

    - purgeElement only reads element guids, it does not create new ones for elements without one.

    - Event.attach returns a single handle if the result from collection processing is a single item.

3.0.0pr2

    - Fixed IE notification error when no arguments are supplied.

    - Added event-simulate.

    - getListeners works when the element has no listeners defined.

    - Event.addListener removed.  Exists only in compat layer.

    - addListerer triggers 2.x event behavior.

    - Removed extra undefined parameter passed to DOM event listeners.

    - Compat layer contains Event.on.

    - Event adapter support added to Y.on

    - Added Y.on('focus', 'blur' event adaptors (support for propagation

      of these events.)

    - publish and subscribe support an object for the type, allowing for multiple

      events/subscriptions.

    - subscriber failures throw an error by default rather than log.

    - subscriber failures are not routed through Y.fail in order to

      improve the debug experience.

    - New facades created every fire()

    - before method re-added to EventTarget, which delegates to Do.before or

      subscribe.

    - EventTarget.after will delegate to Do.after if type is a function

    - Added keylistener: Y.on('key', fn, element, 'down:13,65+ctrl+shift')

    - event:ready event deprecated in favor of domready.

3.0.0pr1

    - Initial Release