js event if user clicks on browser's context menu

Question

How to slideUp nav element if user uses browser's contexmenu and clicks on Open link in a new tab option?

$('.title').on('click', function(){
  $('.nav').slideDown();
});

$('.nav').on('click', function(){
  $(this).slideUp();
});

.title{cursor:pointer;}
.nav{display:none;}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class='title'>MENU</div>
<div class='nav'>
<a href = 'https://google.com'>Google</a>
</div>

Answer 1

Actually, a context menu does not give you, your 100% accepted answer, you can stop the element right click show context menu. you show that a custom menu code here, maybe it helps you. link: http://jsfiddle.net/6cqhsfvL/1/ or above code

$('.title').on('click', function(){
	  $('.nav').slideDown();
	});

	$('.nav').on('click', function(){
		$(this).slideUp();
	});

	$('.nav a').on("mousedown",function(e){
		e.preventDefault();
		if(event.which==3){
			$('#item li a').attr('href', $(this).attr('href'));
		}
	});

	$('.nav a').bind("contextmenu",function(e){
	  	e.preventDefault();
		$("#cntnr").css("left",e.pageX);
		$("#cntnr").css("top",e.pageY);     
		$("#cntnr").fadeIn(200,startFocusOut());    
	});
    $("#items").on('click', 'a', function(event) {
	    event.stopPropagation();
	    $('.nav').slideUp();
	    $("#cntnr").hide(); 
	    window.open($(this).attr('href'), '_blank'  );
    });

	function startFocusOut(){
	  $(document).on("click",function(){
	  $("#cntnr").hide();        
	  $(document).off("click");
	  });
	}

.title{cursor:pointer;}
.nav{display:none;}

#items{
  list-style:none;
  margin:0px;
  margin-top:4px;
  padding-left:10px;
  padding-right:10px;
  padding-bottom:3px;
  font-size:17px;
  color: #333333;
}
#cntnr{
  display:none;
  position:fixed;
  border:1px solid #B2B2B2;
  width:150px;      background:#F9F9F9;
  box-shadow: 3px 3px 2px #E9E9E9;
  border-radius:4px;
}
li{
  padding: 3px;
  padding-left:10px;
}
#items :hover{
   color: white;
  background:#284570;
  border-radius:2px;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
	<div class='title'>MENU</div>
	<div class='nav'>
	<a href = 'https://google.com'>Google</a>
	</div>

	<div id='cntnr'>
	    <ul id='items'>
	    	<li><a target="_blank" href="#">Open new tab</a></li>
	    </ul>
	 </div>