a handy bookmarklet

global js vars

javascript:%20(function(){function%20getPropertyDescriptors(object){var%20props={};for(var%20prop%20in%20object){props[prop]={type:typeof%20object[prop],value:object[prop]}}%20return%20props;}%20function%20getCleanWindow(){var%20elIframe=document.createElement('iframe');elIframe.style.display='none';document.body.appendChild(elIframe);elIframe.src='about:blank';return%20elIframe.contentWindow;}%20function%20appendControl(el,name){var%20elCheckbox=document.createElement('input');elCheckbox.type='checkbox';elCheckbox.checked=true;elCheckbox.id='__'+name;var%20elLabel=document.createElement('label');elLabel.htmlFor='__'+name;elLabel.innerHTML='Exclude%20'+name+'%20properties?';elLabel.style.marginLeft='0.5em';var%20elWrapper=document.createElement('p');elWrapper.style.marginBottom='0.5em';elWrapper.appendChild(elCheckbox);elWrapper.appendChild(elLabel);el.appendChild(elWrapper);}%20function%20appendAnalyze(el){var%20elAnalyze=document.createElement('button');elAnalyze.id='__analyze';elAnalyze.innerHTML='Analyze';elAnalyze.style.marginTop='1em';el.appendChild(elAnalyze);}%20function%20appendCancel(el){var%20elCancel=document.createElement('a');elCancel.href='#';elCancel.innerHTML='Cancel';elCancel.style.cssText='color:#eee;margin-left:0.5em;';elCancel.onclick=function(){el.parentNode.removeChild(el);return%20false;};el.appendChild(elCancel);}%20function%20initConfigPopup(){var%20el=document.createElement('div');el.style.cssText='position:fixed;%20left:10px;%20top:10px;%20width:300px;%20background:rgba(50,50,50,0.9);'+'-moz-border-radius:10px;%20padding:1em;%20color:%20#eee;%20text-align:%20left;'+'font-family:%20"Helvetica%20Neue",%20Verdana,%20Arial,%20sans%20serif;%20z-index:%2099999;';for(var%20prop%20in%20propSets){appendControl(el,prop);}%20appendAnalyze(el);appendCancel(el);document.body.appendChild(el);}%20function%20getPropsCount(object){var%20count=0;for(var%20prop%20in%20object){count++;}%20return%20count;}%20function%20shouldDeleteProperty(propToCheck){for(var%20prop%20in%20propSets){var%20elCheckbox=document.getElementById('__'+prop);var%20isPropInSet=propSets[prop].indexOf(propToCheck)>-1;if(elCheckbox.checked&&isPropInSet){return%20true;}}}%20function%20analyze(){var%20global=(function(){return%20this;})(),globalProps=getPropertyDescriptors(global),cleanWindow=getCleanWindow();for(var%20prop%20in%20cleanWindow){if(globalProps[prop]){delete%20globalProps[prop];}}%20for(var%20prop%20in%20globalProps){if(shouldDeleteProperty(prop)){delete%20globalProps[prop];}}%20console.dir(globalProps);console.log('Total%20amount%20of%20properties:%20'+getPropsCount(globalProps));}%20var%20propSets={'Prototype':'$$%20$A%20$F%20$H%20$R%20$break%20$continue%20$w%20Abstract%20Ajax%20Class%20Enumerable%20Element%20Field%20Form%20'+'Hash%20Insertion%20ObjectRange%20PeriodicalExecuter%20Position%20Prototype%20Selector%20Template%20Toggle%20Try'.split('%20'),'Scriptaculous':'Autocompleter%20Builder%20Control%20Draggable%20Draggables%20Droppables%20Effect%20Sortable%20SortableObserver%20Sound%20Scriptaculous'.split('%20'),'Firebug':'loadFirebugConsole%20console%20_getFirebugConsoleElement%20_FirebugConsole%20_FirebugCommandLine%20_firebug'.split('%20'),'Mozilla':'Components%20XPCNativeWrapper%20XPCSafeJSObjectWrapper%20getInterface%20netscape%20GetWeakReference'.split('%20'),'GoogleAnalytics':'gaJsHost%20gaGlobal%20_gat%20pageTracker'.split('%20')};initConfigPopup();document.getElementById('__analyze').onclick=analyze;})();