关于javascript：jQuery DOMWindow脚本不会释放内存

domjavascriptjquerymemory-management

jQuery DOMWindow script doesn't release memory

我正在尝试使用我发现的jQuery脚本
http://swip.codylindley.com/DOMWindowDemo.html
在我的网站上创建一个灯箱/窗口弹出窗口，当访问者单击链接时。

不幸的是，当用户关闭dom窗口时，脚本似乎没有释放内存。如果用户多次打开和关闭窗口，则会导致页面速度显着降低并使用户的浏览器崩溃。

这是上述网站的jQuery脚本：

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(function($){

//closeDOMWindow
$.fn.closeDOMWindow = function(settings){

if(!settings){settings={};}

var run = function(passingThis){

if(settings.anchoredClassName){
var $anchorClassName = $('.'+settings.anchoredClassName);
$anchorClassName.fadeOut('fast',function(){
if($.fn.draggable){
$anchorClassName.draggable('destory').trigger("unload").remove();
}else{
$anchorClassName.trigger("unload").remove();
}
});
if(settings.functionCallOnClose) {
settings.functionCallAfterClose();
}
}else{
var $DOMWindowOverlay = $('#DOMWindowOverlay');
var $DOMWindow = $('#DOMWindow');
$DOMWindowOverlay.fadeOut('fast',function(){
$DOMWindowOverlay.trigger('unload').unbind().remove();
});
$DOMWindow.fadeOut('fast',function(){
if($.fn.draggable){
$DOMWindow.draggable("destroy").trigger("unload").remove();
}else{
$DOMWindow.trigger("unload").remove();
}
});

$(window).unbind('scroll.DOMWindow');
$(window).unbind('resize.DOMWindow');

if($.fn.openDOMWindow.isIE6){$('#DOMWindowIE6FixIframe').remove();}
if(settings.functionCallOnClose){settings.functionCallAfterClose();}
}
};

if(settings.eventType){//if used with $().
return this.each(function(index){
$(this).bind(settings.eventType, function(){
run(this);
return false;
});
});
}else{//else called as $.function
run();
}

};

//allow for public call, pass settings
$.closeDOMWindow = function(s){$.fn.closeDOMWindow(s);};

//openDOMWindow
$.fn.openDOMWindow = function(instanceSettings){

var shortcut = $.fn.openDOMWindow;

//default settings combined with callerSettings////////////////////////////////////////////////////////////////////////

shortcut.defaultsSettings = {
anchoredClassName:'',
anchoredSelector:'',
borderColor:'#ccc',
borderSize:'4',
draggable:0,
eventType:null, //click, blur, change, dblclick, error, focus, load, mousedown, mouseout, mouseup etc...
fixedWindowY:100,
functionCallOnOpen:null,
functionCallOnClose:null,
height:500,
loader:0,
loaderHeight:0,
loaderImagePath:'',
loaderWidth:0,
modal:0,
overlay:1,
overlayColor:'#000',
overlayOpacity:'85',
positionLeft:0,
positionTop:0,
positionType:'centered', // centered, anchored, absolute, fixed
width:500,
windowBGColor:'#fff',
windowBGImage:null, // http path
windowHTTPType:'get',
windowPadding:10,
windowSource:'inline', //inline, ajax, iframe
windowSourceID:'',
windowSourceURL:'',
windowSourceAttrURL:'href'
};

var settings = $.extend({}, $.fn.openDOMWindow.defaultsSettings , instanceSettings || {});

//Public functions

shortcut.viewPortHeight = function(){ return self.innerHeight || document.documentElement.clientHeight || document.body.clientHeight;};
shortcut.viewPortWidth = function(){ return self.innerWidth || document.documentElement.clientWidth || document.body.clientWidth;};
shortcut.scrollOffsetHeight = function(){ return self.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop;};
shortcut.scrollOffsetWidth = function(){ return self.pageXOffset || document.documentElement.scrollLeft || document.body.scrollLeft;};
shortcut.isIE6 = typeof document.body.style.maxHeight ==="undefined";

//Private Functions/////////////////////////////////////////////////////////////////////////////////////////////////////////

var sizeOverlay = function(){
var $DOMWindowOverlay = $('#DOMWindowOverlay');
if(shortcut.isIE6){//if IE 6
var overlayViewportHeight = document.documentElement.offsetHeight + document.documentElement.scrollTop - 4;
var overlayViewportWidth = document.documentElement.offsetWidth - 21;
$DOMWindowOverlay.css({'height':overlayViewportHeight +'px','width':overlayViewportWidth+'px'});
}else{//else Firefox, safari, opera, IE 7+
$DOMWindowOverlay.css({'height':'100%','width':'100%','position':'fixed'});
}
};

var sizeIE6Iframe = function(){
var overlayViewportHeight = document.documentElement.offsetHeight + document.documentElement.scrollTop - 4;
var overlayViewportWidth = document.documentElement.offsetWidth - 21;
$('#DOMWindowIE6FixIframe').css({'height':overlayViewportHeight +'px','width':overlayViewportWidth+'px'});
};

var centerDOMWindow = function() {
var $DOMWindow = $('#DOMWindow');
if(settings.height + 50 > shortcut.viewPortHeight()){//added 50 to be safe
$DOMWindow.css('left',Math.round(shortcut.viewPortWidth()/2) + shortcut.scrollOffsetWidth() - Math.round(($DOMWindow.outerWidth())/2));
}else{
$DOMWindow.css('left',Math.round(shortcut.viewPortWidth()/2) + shortcut.scrollOffsetWidth() - Math.round(($DOMWindow.outerWidth())/2));
$DOMWindow.css('top',Math.round(shortcut.viewPortHeight()/2) + shortcut.scrollOffsetHeight() - Math.round(($DOMWindow.outerHeight())/2));
}
};

var centerLoader = function() {
var $DOMWindowLoader = $('#DOMWindowLoader');
if(shortcut.isIE6){//if IE 6
$DOMWindowLoader.css({'left':Math.round(shortcut.viewPortWidth()/2) + shortcut.scrollOffsetWidth() - Math.round(($DOMWindowLoader.innerWidth())/2),'position':'absolute'});
$DOMWindowLoader.css({'top':Math.round(shortcut.viewPortHeight()/2) + shortcut.scrollOffsetHeight() - Math.round(($DOMWindowLoader.innerHeight())/2),'position':'absolute'});
}else{
$DOMWindowLoader.css({'left':'50%','top':'50%','position':'fixed'});
}

};

var fixedDOMWindow = function(){
var $DOMWindow = $('#DOMWindow');
$DOMWindow.css('left', settings.positionLeft + shortcut.scrollOffsetWidth());
$DOMWindow.css('top', + settings.positionTop + shortcut.scrollOffsetHeight());
};

var showDOMWindow = function(instance){
if(arguments[0]){
$('.'+instance+' #DOMWindowLoader').remove();
$('.'+instance+' #DOMWindowContent').fadeIn('fast',function(){if(settings.functionCallOnOpen){settings.functionCallOnOpen();}});
$('.'+instance+ '.closeDOMWindow').click(function(){
$.closeDOMWindow();
return false;
});
}else{
$('#DOMWindowLoader').remove();
$('#DOMWindow').fadeIn('fast',function(){if(settings.functionCallOnOpen){settings.functionCallOnOpen();}});
$('#DOMWindow .closeDOMWindow').click(function(){
$.closeDOMWindow();
return false;
});
}

};

var urlQueryToObject = function(s){
var query = {};
s.replace(/b([^&=]*)=([^&=]*)b/g, function (m, a, d) {
if (typeof query[a] != 'undefined') {
query[a] += ',' + d;
} else {
query[a] = d;
}
});
return query;
};

//Run Routine ///////////////////////////////////////////////////////////////////////////////////////////////////////////////
var run = function(passingThis){

//get values from element clicked, or assume its passed as an option
settings.windowSourceID = $(passingThis).attr('href') || settings.windowSourceID;
settings.windowSourceURL = $(passingThis).attr(settings.windowSourceAttrURL) || settings.windowSourceURL;
settings.windowBGImage = settings.windowBGImage ? 'background-image:url('+settings.windowBGImage+')' : '';
var urlOnly, urlQueryObject;

if(settings.positionType == 'anchored'){//anchored DOM window

var anchoredPositions = $(settings.anchoredSelector).position();
var anchoredPositionX = anchoredPositions.left + settings.positionLeft;
var anchoredPositionY = anchoredPositions.top + settings.positionTop;

$('body').append('');
//loader
if(settings.loader && settings.loaderImagePath !== ''){
$('.'+settings.anchoredClassName).append('<img src="'+settings.loaderImagePath+'" />');

}

if($.fn.draggable){
if(settings.draggable){$('.' + settings.anchoredClassName).draggable({cursor:'move'});}
}

switch(settings.windowSource){
case 'inline'://////////////////////////////// inline //////////////////////////////////////////
$('.' + settings.anchoredClassName+" #DOMWindowContent").append($(settings.windowSourceID).children());
$('.' + settings.anchoredClassName).unload(function(){// move elements back when you're finished
$('.' + settings.windowSourceID).append( $('.' + settings.anchoredClassName+" #DOMWindowContent").children());
});
showDOMWindow(settings.anchoredClassName);
break;
case 'iframe'://////////////////////////////// iframe //////////////////////////////////////////
$('.' + settings.anchoredClassName+" #DOMWindowContent").append('<iframe frameborder="0" hspace="0" wspace="0" src="'+settings.windowSourceURL+'" name="DOMWindowIframe'+Math.round(Math.random()*1000)+'" style="width:100%;height:100%;border:none;background-color:#fff;" class="'+settings.anchoredClassName+'Iframe"></iframex>');
$('.'+settings.anchoredClassName+'Iframe').load(showDOMWindow(settings.anchoredClassName));
break;
case 'ajax'://////////////////////////////// ajax //////////////////////////////////////////
if(settings.windowHTTPType == 'post'){

if(settings.windowSourceURL.indexOf("?") !== -1){//has a query string
urlOnly = settings.windowSourceURL.substr(0, settings.windowSourceURL.indexOf("?"));
urlQueryObject = urlQueryToObject(settings.windowSourceURL);
}else{
urlOnly = settings.windowSourceURL;
urlQueryObject = {};
}
$('.' + settings.anchoredClassName+" #DOMWindowContent").load(urlOnly,urlQueryObject,function(){
showDOMWindow(settings.anchoredClassName);
});
}else{
if(settings.windowSourceURL.indexOf("?") == -1){ //no query string, so add one
settings.windowSourceURL += '?';
}
$('.' + settings.anchoredClassName+" #DOMWindowContent").load(
settings.windowSourceURL + '&random=' + (new Date().getTime()),function(){
showDOMWindow(settings.anchoredClassName);
});
}
break;
}

}else{//centered, fixed, absolute DOM window

//overlay & modal
if(settings.overlay){
$('body').append('');
if(shortcut.isIE6){//if IE 6
$('body').append('<iframe id="DOMWindowIE6FixIframe" src="blank.html" style="width:100%;height:100%;z-index:9999;position:absolute;top:0;left:0;filter:alpha(opacity=0);"></iframex>');
sizeIE6Iframe();
}
sizeOverlay();
var $DOMWindowOverlay = $('#DOMWindowOverlay');
$DOMWindowOverlay.fadeIn('fast');
if(!settings.modal){$DOMWindowOverlay.click(function(){$.closeDOMWindow();});}
}

//loader
if(settings.loader && settings.loaderImagePath !== ''){
$('body').append('<img src="'+settings.loaderImagePath+'" />');
centerLoader();
}

//add DOMwindow
$('body').append('');

var $DOMWindow = $('#DOMWindow');
//centered, absolute, or fixed
switch(settings.positionType){
case 'centered':
centerDOMWindow();
if(settings.height + 50 > shortcut.viewPortHeight()){//added 50 to be safe
$DOMWindow.css('top', (settings.fixedWindowY + shortcut.scrollOffsetHeight()) + 'px');
}
break;
case 'absolute':
$DOMWindow.css({'top':(settings.positionTop+shortcut.scrollOffsetHeight())+'px','left':(settings.positionLeft+shortcut.scrollOffsetWidth())+'px'});
if($.fn.draggable){
if(settings.draggable){$DOMWindow.draggable({cursor:'move'});}
}
break;
case 'fixed':
fixedDOMWindow();
break;
case 'anchoredSingleWindow':
var anchoredPositions = $(settings.anchoredSelector).position();
var anchoredPositionX = anchoredPositions.left + settings.positionLeft;
var anchoredPositionY = anchoredPositions.top + settings.positionTop;
$DOMWindow.css({'top':anchoredPositionY + 'px','left':anchoredPositionX+'px'});

break;
}

$(window).bind('scroll.DOMWindow',function(){
if(settings.overlay){sizeOverlay();}
if(shortcut.isIE6){sizeIE6Iframe();}
if(settings.positionType == 'centered'){centerDOMWindow();}
if(settings.positionType == 'fixed'){fixedDOMWindow();}
});

$(window).bind('resize.DOMWindow',function(){
if(shortcut.isIE6){sizeIE6Iframe();}
if(settings.overlay){sizeOverlay();}
if(settings.positionType == 'centered'){centerDOMWindow();}
});

switch(settings.windowSource){
case 'inline'://////////////////////////////// inline //////////////////////////////////////////
$DOMWindow.append($(settings.windowSourceID).children());
$DOMWindow.unload(function(){// move elements back when you're finished
$(settings.windowSourceID).append($DOMWindow.children());
});
showDOMWindow();
break;
case 'iframe'://////////////////////////////// iframe //////////////////////////////////////////
$DOMWindow.append('<iframe frameborder="0" hspace="0" wspace="0" src="'+settings.windowSourceURL+'" name="DOMWindowIframe'+Math.round(Math.random()*1000)+'" style="width:100%;height:100%;border:none;background-color:#fff;" id="DOMWindowIframe"></iframex>');
$('#DOMWindowIframe').load(showDOMWindow());
break;
case 'ajax'://////////////////////////////// ajax //////////////////////////////////////////
if(settings.windowHTTPType == 'post'){

if(settings.windowSourceURL.indexOf("?") !== -1){//has a query string
urlOnly = settings.windowSourceURL.substr(0, settings.windowSourceURL.indexOf("?"));
urlQueryObject = urlQueryToObject(settings.windowSourceURL);
}else{
urlOnly = settings.windowSourceURL;
urlQueryObject = {};
}
$DOMWindow.load(urlOnly,urlQueryObject,function(){
showDOMWindow();
});
}else{
if(settings.windowSourceURL.indexOf("?") == -1){ //no query string, so add one
settings.windowSourceURL += '?';
}
$DOMWindow.load(
settings.windowSourceURL + '&random=' + (new Date().getTime()),function(){
showDOMWindow();
});
}
break;
}

}//end if anchored, or absolute, fixed, centered

};//end run()

if(settings.eventType){//if used with $().
return this.each(function(index){
$(this).bind(settings.eventType,function(){
run(this);
return false;
});
});
}else{//else called as $.function
run();
}

};//end function openDOMWindow

//allow for public call, pass settings
$.openDOMWindow = function(s){$.fn.openDOMWindow(s);};

})(jQuery);

这是我的HTML中的超链接标签，用于打开灯箱。

1	Change Icon

这是围攻过程中的屏幕快照，详细说明了每次用户打开和关闭该链接的DOM窗口时内存增加的步骤。任何帮助是极大的赞赏。谢谢！
enter

相关讨论

问题是，remove()从文档树中删除节点，但是它们仍然可用(例如，您可以再次使用它们并将它们放回到文档中)。

在MSIE中，您可以将节点的externalHTML属性设置为空字符串以真正将其删除，在其他浏览器中，我不确定如何删除。您可以看一下：http://www.josh-davis.org/node/7。

作者在那里使用了删除语句，但是我不确定它是否真的删除了节点。

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