$(document).ready(function(){
        $(document).on("click",".icon-chevron-down",function(){
            let aktiv = $(".icon-chevron-up").attr("data-target");
            if(aktiv){
                $(".icon-chevron-up").addClass("icon-chevron-down");
                $(".icon-chevron-up").removeClass("icon-chevron-up");
                $("#"+aktiv).slideUp("slow");
            }
            target = $(this).attr("data-target");
            $(this).addClass("icon-chevron-up");
            $(this).removeClass("icon-chevron-down");
            $("#"+target).slideDown("slow");

        });
        $(document).on("click",".icon-chevron-up",function(){
            target = $(this).attr("data-target");
            $(this).addClass("icon-chevron-down");
            $(this).removeClass("icon-chevron-up");
            $("#"+target).slideUp("slow");
        });

    $("#burger").click(function(){
        $("body > nav").addClass("aktiv");
    });
    $(".icon-circle-with-cross").click(function(){
        $("body > nav").removeClass("aktiv");
    });
});