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)');     console.log(lastOpenSite); }); 

I get "false" instead of getting one of the other elements (assuming that there is one - and there must be). I guess the problem is with:

.hasClass(':not(.closedTab)'); 

What is the problem?

My purpose is to create my own accordion (without using jQuery UI)

and I am trying to write it like this:

$('#sitesAccordion .groupOfSites').click(function() {      //Get the last opened tab     var lastOpenSite = $(this).siblings().hasClass(':not(.closedTab)');      //Close last opened tab and add class     lastOpenSite.hide().toggleClass('closedTab');      //Open the current Tab     $(this).children('.accordionContent').toggle('fast');      // remove class from open tab     $(this).toggleClass('closedTab');   }); 

Is this the best way? thanks, Alon

Answer 1

Use the not function instead:

var lastOpenSite = $(this).siblings().not('.closedTab'); 

hasClass only tests whether an element has a class, not will remove elements from the selected set matching the provided selector.

Answer 2

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.