 
// Handle object literals 
if ( typeof type === "object" ) { 
for ( var key in type ) { 
this[ name ](key, data, type[key], fn); 
} 
return this; 
} 

2，注釋

復(fù)制代碼代碼如下:

// Add which for click: 1 === left; 2 === middle; 3 === right

應(yīng)修改為

復(fù)制代碼代碼如下:

// Add which for mousedown/mouseup : 1 === left; 2 === middle; 3 === right

3，data方法，定義了局部變量internalKey，但后續(xù)代碼仍然沿用jQuery.expando。

復(fù)制代碼代碼如下:

 
var internalKey = jQuery.expando, getByName = typeof name === "string", thisCache, 

4，jQuery.event.add方法，arguments改為e，apply改為call 更好一些。因為只會傳一個參數(shù)：事件對象。

復(fù)制代碼代碼如下:

 
elemData.handle = eventHandle = function( e ) { 
// Discard the second event of a jQuery.event.trigger() and 
// when an event is called after a page has unloaded 
return typeof jQuery !== "undefined" && (!e || jQuery.event.triggered !== e.type) ? 
jQuery.event.handle.apply( eventHandle.elem, arguments ) : 
undefined; 

}; 

5，基于 “勿重復(fù)檢測瀏覽器” 原則，jQuery.event.add 以下代碼

復(fù)制代碼代碼如下:

 
if ( elem.addEventListener ) { 
elem.addEventListener( type, eventHandle, false ); 

} else if ( elem.attachEvent ) { 
elem.attachEvent( "on" + type, eventHandle ); 
} 

應(yīng)該使用以下來替換

復(fù)制代碼代碼如下:

 
jQuery.addEvent = document.addEventListener ? 
function( elem, type, handle ) { 
if ( elem.addEventListener ) { 
elem.addEventListener( type, handle, false ); 
} 
} : 
function( elem, type, handle ) { 
if ( elem.attactEvent ) { 
elem.attactEvent( "on" + type, handle ); 
} 
}; 

事實上，jQuery中已經(jīng)有了jQuery.removeEvent，卻不知為何沒有jQuery.addEvent。

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