Sidebar Categories change arrow when subcategories are shown on click

I added these lines:
$(this).removeClass(‘ic-arrdn’).addClass(‘ic-arrup’);
$(this).removeClass(‘ic-arrdn’).addClass(‘ic-arrup’);

and achieved the result.

$(document).ready(function () {
        $("aside ul li:has(ul)").addClass("ic-arrdn");
        var e = $("aside > ul > li.current-cat, aside > ul > li.current-cat-parent");
        if (e.length == 1) {
        }
        $("aside > ul > li > ul.children").each(function () {
            $(this).find("li")
            $(this).parent().toggle(function () {
                $(this).find("ul").slideDown();
                $(this).removeClass('ic-arrdn').addClass('ic-arrup');   
            }, function () {
                $(this).find("ul").slideUp();
                $(this).removeClass('ic-arrdn').addClass('ic-arrup');   
            });
        });
    });