当菜单通过Jquery向下滑动时，媒体查询不起作用

Question

I created a navigationsbar. If the display is smaller than 856px , the design will change (media-queries). Now you can press on Menü and the navigation will slide down. Look at the 3 steps here:

You can test it by yourself. Here is the link: mypage

My Code:

  $("#nav_menu_header").click(function(){ if($(".navbar_li").is(':visible')){ $(".navbar_li").slideToggle("slow"); } else{ $(".navbar_li").slideDown("slow"); } }) 

 nav{ width: 100%; background-color: rgb(25, 25, 25); border-bottom: 4px solid rgb(255, 125, 0); position: fixed; top: 0; left: 0; } .navbar_ul{ list-style-type: none; width: 1100px; margin: 0 auto; } .navbar_li{ display: inline-block; margin-top: 10px; margin-bottom: 10px; margin-right: 30px; } .navbar_a{ color: white; text-decoration: none; transition: color 0.2s ease-in-out 0s; } .navbar_a:hover{ color: rgb(255, 125, 0); } #nav_menu_header{ display: none; color: white; text-decoration: none; padding: 10px 0px; width: 100%; padding-left: 30px; border-bottom: 4px solid rgb(255, 125, 0); } .symbol{ margin-right: 10px; } #nav_menu_header:hover{ cursor: pointer; } 

  <nav> <a id="nav_menu_header"><i class="fa fa-home symbol"></i>Menü</a> <ul class="navbar_ul"> <li class="navbar_li"><a class="navbar_a" href="index.php?content=create_tutorial">Tutorial erstellen</a></li> <li class="navbar_li"><a class="navbar_a" href="index.php?content=all_tutorial">Alle Tutorials</a></li> <li class="navbar_li"><a class="navbar_a" href="#">Suche</a></li> </ul> </nav> 

Mediq Query:

 @media only screen and (max-width : 855px) { nav{ border: none; } .navbar_ul{ list-style-type: none; } .navbar_li{ display: none; margin: 0px; padding: 0px; border-bottom: 4px solid rgb(255, 125, 0); } .navbar_a{ color: white; text-decoration: none; padding: 10px 0px; width: 100%; display: block; padding-left: 30px; transition: color 0.2s ease-in-out 0s; } .navbar_a:hover{ color: rgb(255, 125, 0); } #nav_menu_header{ display: block; } } 

How can i get the normal navigationbar, if I press the x ?

Answer 1

As I told you in the comment it is related to jquery . We will need to add resize event as follows:

$("#nav_menu_header").click(function(){
        if($(".navbar_li").is(':visible')){
            $(".navbar_li").css('display','none');
        }
        else{
            $(".navbar_li").css('display','block');
        }
    });
$(window).resize(function(){
if($("#nav_menu_header").is(':visible')){ 
  $(".navbar_li").css('display','none');
}
else{
  $(".navbar_li").css('display','inline-block');
}
});

Checkout this DEMO