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jQuery.event.fix performance boost. An example: click event was previously ~3ms and...
author
Brandon Aaron
<brandon.aaron@gmail.com>
Mon, 28 Apr 2008 21:09:27 +0000
(21:09 +0000)
committer
Brandon Aaron
<brandon.aaron@gmail.com>
Mon, 28 Apr 2008 21:09:27 +0000
(21:09 +0000)
src/event.js
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diff --git
a/src/event.js
b/src/event.js
index
2d9bdc2
..
0cf6c58
100644
(file)
--- a/
src/event.js
+++ b/
src/event.js
@@
-184,8
+184,16
@@
jQuery.event = {
event = !data[0] || !data[0].preventDefault;
// Pass along a fake event
event = !data[0] || !data[0].preventDefault;
// Pass along a fake event
- if ( event )
- data.unshift( { type: type, target: elem } );
+ if ( event ) {
+ data.unshift({
+ type: type,
+ target: elem,
+ preventDefault: function(){},
+ stopPropagation: function(){},
+ timeStamp: +new Date
+ });
+ data[0][expando] = true; // no need to fix fake event
+ }
// Enforce the right trigger type
data[0].type = type;
// Enforce the right trigger type
data[0].type = type;
@@
-265,11
+273,6
@@
jQuery.event = {
}
}
}
}
- // Clean up added properties in IE to prevent memory leak
- if (jQuery.browser.msie)
- event.target = event.preventDefault = event.stopPropagation =
- event.handler = event.data = event[expando] = null;
-
return val;
},
return val;
},
@@
-278,9
+281,12
@@
jQuery.event = {
return event;
// store a copy of the original event object
return event;
// store a copy of the original event object
- // and clone to set read-only properties
+ // and "clone" to set read-only properties
var originalEvent = event;
var originalEvent = event;
- event = jQuery.extend({}, originalEvent);
+ event = { originalEvent: originalEvent };
+ var props = "altKey attrChange attrName bubbles button cancelable charCode clientX clientY ctrlKey currentTarget data detail eventPhase fromElement handler keyCode metaKey newValue pageX pageY prevValue relatedNode relatedTarget screenX screenY shiftKey srcElement target timeStamp toElement type view wheelDelta which".split(" ");
+ for ( var i=props.length; i; i-- )
+ event[ props[i] ] = originalEvent[ props[i] ];
// Mark it as fixed
event[expando] = true;
// Mark it as fixed
event[expando] = true;
@@
-311,7
+317,7
@@
jQuery.event = {
// check if target is a textnode (safari)
if ( event.target.nodeType == 3 )
// check if target is a textnode (safari)
if ( event.target.nodeType == 3 )
- event.target = originalEvent.target.parentNode;
+ event.target = event.target.parentNode;
// Add relatedTarget, if necessary
if ( !event.relatedTarget && event.fromElement )
// Add relatedTarget, if necessary
if ( !event.relatedTarget && event.fromElement )