div#single-featured-image-header выберет все div с id single-featured-image-headerdiv.single-featured-image-header
function counter(event) {
var element = event.target; // DOM element, in this example .owl-carousel
var items = event.item.count; // Number of items
var item = event.page.index + 1; // Position of the current item
if (item == 0) {
item = 1;
}
$('#counter').html(""+item+" of "+items)
}
});transition: width 0.3s, height 0.3s;
на