Question

i have lots of divlayers with the class named “.current”. depending on what the user does some of remove the class and some will get it again. this works fine, but what i want to is fire an event if only one div layer has the class “.current”. how can i detect if only one element has the class current?
for example

if ($('#div4').hasClass('.current')) {
    alert("fire me something");
}

something like “is the only one” hasClass.

Answer 1

in your event callback, simply check the number of divs that have the current class:

if ($('#div4').hasClass('current') && $('div.current').length === 1) {
    ...do stuff...
}

If you’re only ever using current on divs, then you could just use $('.current').length === 1.