How to use in jQuery :not and hasClass() to get a specific element without a class

Question

I have this line of code:

$(\'#sitesAccordion .groupOfSites\').click(function() {
    var lastOpenSite = $(this).siblings().hasClass(\':not(.closedTab)\');
    c         


        

Answer 1

It's much easier to do like this:

if(!$('#foo').hasClass('bar')) { 
  ...
}

The ! in front of the criteria means false, works in most programming languages.