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fine-tune jQuery requirements for megamenu

 原文  2016-03-21 08:22:24  2   1    javascript/ jquery/ html/ css/ jquery-ui

Question

I have created 4 level megamenu with using jquery. it works 80% according to my requirement sometimes it lagging between tabs. i'm not 100% satisfied with the jquery Can we refine the jquery further and is there any loopholes that I missed? if anyone could point me in the right direction or what i did wrong, I'd really appreciate it(free to change any CSS/HTML).

note : once sublevel window open it displays default URL

for html/css/jquery https://jsfiddle.net/mg02rxra/4/ 

  <script>

    $(function(){
        var _timer;
        $('#menu > li > a').on("mouseenter",function(){
                 mainLoad(this); //, 1000);                  
        });
        $('#menu').on("mouseleave", function(){
                _timer = setTimeout(
                showDefault , 100);
                }).on("mouseenter", function(){
                clearTimeout(_timer); 
        });

        function mainLoad(param){
                    var li_ = param;
                    var x = $(param).parent();
                    var ul_ = x.find(".sublevel1");
                    $('#menu > li > a').removeClass('active');
                    $(param).addClass('active');           
                    $('.sublevel1').css('display','none');
                    $(ul_).css('display','block');    
        }                  

        function showDefault() {              
            $('.sublevel1').css('display','none');
            $('#menu > li > a').removeClass('active');
        }

        $('.sublevel1 > div > li > a').on("mouseenter",function(){
                var li_ = this;
                var x = $(this).parent().index() + 1;                
                $('.level1-a').removeClass('active');
                $('.level1:nth-child(' + x + ') .level1-a').addClass('active');
                $('.default, .info').css('display','none'); 
                $('.level1:nth-child(' + x +') .info').css('display','block');        
        });
        $(".xman").on("mouseleave", function(){
            _timer = setTimeout(
               showDefault2 , 100);
            }).on("mouseenter", function(){
               clearTimeout(_timer); 
       });

       function showDefault2() {              
             $('.level1-a').removeClass('active');
             $('.info').css('display','none')
             $('.default').css('display','block');   
       }  

    });
</script>

1 answers

solution1
 0  2016-03-21 08:39:22

Why you are using jQuery for menu - sub menu functionality ? Jquery always lagging - because it always execute the code, once you done mouse over. But you can do this by using CSS by efficient way. Please use this link for getting this functionality : http://cssmenumaker.com/menu/opera-drop-down-menu

Also , i am attaching code as following

index.html 

<!doctype html>
<html lang=''>
<head>
   <meta charset='utf-8'>
   <meta http-equiv="X-UA-Compatible" content="IE=edge">
   <meta name="viewport" content="width=device-width, initial-scale=1">
   <link rel="stylesheet" href="styles.css">
   <script src="http://code.jquery.com/jquery-latest.min.js" type="text/javascript"></script>
   <script src="script.js"></script>
   <title>CSS MenuMaker</title>
</head>
<body>

<div id='cssmenu'>
<ul>
   <li><a href='#'><span>Home</span></a></li>
   <li class='active has-sub'><a href='#'><span>Products</span></a>
      <ul>
         <li class='has-sub'><a href='#'><span>Product 1</span></a>
            <ul>
               <li><a href='#'><span>Sub Product</span></a></li>
               <li class='last'><a href='#'><span>Sub Product</span></a></li>
            </ul>
         </li>
         <li class='has-sub'><a href='#'><span>Product 2</span></a>
            <ul>
               <li><a href='#'><span>Sub Product</span></a></li>
               <li class='last'><a href='#'><span>Sub Product</span></a></li>
            </ul>
         </li>
      </ul>
   </li>
   <li><a href='#'><span>About</span></a></li>
   <li class='last'><a href='#'><span>Contact</span></a></li>
</ul>
</div>

</body>
<html>

styles.css 

#cssmenu ul,
#cssmenu li,
#cssmenu span,
#cssmenu a {
  margin: 0;
  padding: 0;
  position: relative;
}
#cssmenu {
  line-height: 1;
  border-radius: 5px 5px 0 0;
  -moz-border-radius: 5px 5px 0 0;
  -webkit-border-radius: 5px 5px 0 0;
  background: #141414;
  background: -moz-linear-gradient(top, #333333 0%, #141414 100%);
  background: -webkit-gradient(linear, left top, left bottom, color-stop(0%, #333333), color-stop(100%, #141414));
  background: -webkit-linear-gradient(top, #333333 0%, #141414 100%);
  background: -o-linear-gradient(top, #333333 0%, #141414 100%);
  background: -ms-linear-gradient(top, #333333 0%, #141414 100%);
  background: linear-gradient(to bottom, #333333 0%, #141414 100%);
  border-bottom: 2px solid #0fa1e0;
  width: auto;
}
#cssmenu:after,
#cssmenu ul:after {
  content: '';
  display: block;
  clear: both;
}
#cssmenu a {
  background: #141414;
  background: -moz-linear-gradient(top, #333333 0%, #141414 100%);
  background: -webkit-gradient(linear, left top, left bottom, color-stop(0%, #333333), color-stop(100%, #141414));
  background: -webkit-linear-gradient(top, #333333 0%, #141414 100%);
  background: -o-linear-gradient(top, #333333 0%, #141414 100%);
  background: -ms-linear-gradient(top, #333333 0%, #141414 100%);
  background: linear-gradient(to bottom, #333333 0%, #141414 100%);
  color: #ffffff;
  display: block;
  font-family: Helvetica, Arial, Verdana, sans-serif;
  padding: 19px 20px;
  text-decoration: none;
}
#cssmenu ul {
  list-style: none;
}
#cssmenu > ul > li {
  display: inline-block;
  float: left;
  margin: 0;
}
#cssmenu.align-center {
  text-align: center;
}
#cssmenu.align-center > ul > li {
  float: none;
}
#cssmenu.align-center ul ul {
  text-align: left;
}
#cssmenu.align-right > ul {
  float: right;
}
#cssmenu.align-right ul ul {
  text-align: right;
}
#cssmenu > ul > li > a {
  color: #ffffff;
  font-size: 12px;
}
#cssmenu > ul > li:hover:after {
  content: '';
  display: block;
  width: 0;
  height: 0;
  position: absolute;
  left: 50%;
  bottom: 0;
  border-left: 10px solid transparent;
  border-right: 10px solid transparent;
  border-bottom: 10px solid #0fa1e0;
  margin-left: -10px;
}
#cssmenu > ul > li:first-child > a {
  border-radius: 5px 0 0 0;
  -moz-border-radius: 5px 0 0 0;
  -webkit-border-radius: 5px 0 0 0;
}
#cssmenu.align-right > ul > li:first-child > a,
#cssmenu.align-center > ul > li:first-child > a {
  border-radius: 0;
  -moz-border-radius: 0;
  -webkit-border-radius: 0;
}
#cssmenu.align-right > ul > li:last-child > a {
  border-radius: 0 5px 0 0;
  -moz-border-radius: 0 5px 0 0;
  -webkit-border-radius: 0 5px 0 0;
}
#cssmenu > ul > li.active > a,
#cssmenu > ul > li:hover > a {
  color: #ffffff;
  box-shadow: inset 0 0 3px #000000;
  -moz-box-shadow: inset 0 0 3px #000000;
  -webkit-box-shadow: inset 0 0 3px #000000;
  background: #070707;
  background: -moz-linear-gradient(top, #262626 0%, #070707 100%);
  background: -webkit-gradient(linear, left top, left bottom, color-stop(0%, #262626), color-stop(100%, #070707));
  background: -webkit-linear-gradient(top, #262626 0%, #070707 100%);
  background: -o-linear-gradient(top, #262626 0%, #070707 100%);
  background: -ms-linear-gradient(top, #262626 0%, #070707 100%);
  background: linear-gradient(to bottom, #262626 0%, #070707 100%);
}
#cssmenu .has-sub {
  z-index: 1;
}
#cssmenu .has-sub:hover > ul {
  display: block;
}
#cssmenu .has-sub ul {
  display: none;
  position: absolute;
  width: 200px;
  top: 100%;
  left: 0;
}
#cssmenu.align-right .has-sub ul {
  left: auto;
  right: 0;
}
#cssmenu .has-sub ul li {
  *margin-bottom: -1px;
}
#cssmenu .has-sub ul li a {
  background: #0fa1e0;
  border-bottom: 1px dotted #31b7f1;
  font-size: 11px;
  filter: none;
  display: block;
  line-height: 120%;
  padding: 10px;
  color: #ffffff;
}
#cssmenu .has-sub ul li:hover a {
  background: #0c7fb0;
}
#cssmenu ul ul li:hover > a {
  color: #ffffff;
}
#cssmenu .has-sub .has-sub:hover > ul {
  display: block;
}
#cssmenu .has-sub .has-sub ul {
  display: none;
  position: absolute;
  left: 100%;
  top: 0;
}
#cssmenu.align-right .has-sub .has-sub ul,
#cssmenu.align-right ul ul ul {
  left: auto;
  right: 100%;
}
#cssmenu .has-sub .has-sub ul li a {
  background: #0c7fb0;
  border-bottom: 1px dotted #31b7f1;
}
#cssmenu .has-sub .has-sub ul li a:hover {
  background: #0a6d98;
}
#cssmenu ul ul li.last > a,
#cssmenu ul ul li:last-child > a,
#cssmenu ul ul ul li.last > a,
#cssmenu ul ul ul li:last-child > a,
#cssmenu .has-sub ul li:last-child > a,
#cssmenu .has-sub ul li.last > a {
  border-bottom: 0;
}

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