Incorrect event type reported on hover within a setTimeout

[Motty]

When I add a setTimeout within a hover function, the e.type returns "mouseover" and "mouseout" instead of "mouseenter" and "mouseleave".

jsFiddle: ​http://jsfiddle.net/Mottie/P6gCg/1/

$('#test').hover(function(e){
    console.log(e.type);
    setTimeout(function(){
        console.log('after timeout: ' + e.type);
    }, 0);
});​

This problem occurs in jQuery v1.6.4+. Versions prior to this report the correct event type.

[Rick Waldron]

Duplicate of #11690.

[Motty]

Hmm, ok I get the same incorrect event types when I bind to "mouseenter" and "mouseleave" (​http://jsfiddle.net/Mottie/P6gCg/3/):

$('#test').bind('mouseenter mouseleave', function(e){
    console.log(e.type);
    setTimeout(function(){
        console.log('after timeout: ' + e.type);
    }, 0);
});​

Again, this happens in jQuery 1.6.4+

[dmethvin]

The event object is valid only for the duration of the event. After it returns you can't expect it to remain unchanged. In fact, the entire native event object (event.originalEvent) cannot be read in IE6/7/8 after the event has passed--it's gone and will throw an error if you try to access it. If you need an unchanging copy of some event data, make one.