Check if element contains any of the class from array

Question

I have the following elements:

Answer 1

Question depends on what you are trying to do.

If you are trying to create a collection of those elements you can create a selector from the array:

var elemCollection = $(  '.' + obj.join(',.') ).doSomething();

Can also be used in filter()

$existingElementCollection.filter(  '.' + obj.join(',.') ).doSomething();

Or can be used in is()

var filterSelector =  '.' + obj.join(',.');
$someCollection.each(function(){
   if($(this).is( filterSelector ){
     // do somthing for matches
   }
});

DEMO