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jquery implements a multi-level menu effect example with gradient fade in and out and expands to the right_jquery

WBOY
WBOYOriginal
2016-05-16 15:43:281322browse

The example in this article describes how jquery implements a multi-level menu effect with gradient fade-in and fade-out and expands to the right. Share it with everyone for your reference. The details are as follows:

This is a multi-level navigation menu special effect based on jquery. The menu items are expanded horizontally to the right. Of course, this menu is not perfect, so it is not beautified. In addition, there is a menu mark missing in the upper-level menu including the submenu. , so users sometimes don't know which menu contains lower-level submenus. But adding such a mark seems to be quite simple, you can add it yourself.

The screenshot of the running effect is as follows:

The online demo address is as follows:

http://demo.jb51.net/js/2015/jquery-right-show-menu-codes/

The specific code is as follows: 

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>jquery多级下拉侧导航amazonmenu</title>
<style>
.amazonmenu ul {
font: normal 12px Verdana;
list-style: none;
margin: 0;
padding: 0;
-moz-box-sizing: border-box;
-webkit-box-sizing: border-box;
box-sizing: border-box;
}
.amazonmenu ul li {
position: static; 
}
.amazonmenu > ul {
background: white;
border: 1px solid gray;
border-radius: 5px;
width: 200px;
height: 400px;
position: relative;
}
.amazonmenu > ul li a {
color: black;
display: block;
overflow: auto;
padding: 10px 0;
position: relative;
text-decoration: none;
text-indent: 10px;
}
.amazonmenu > ul li.hassub > a::after {
 border: 5px solid transparent;
 border-left-color: gray;
 content: '';
 height: 0;
 position: absolute;
 right: 5px;
 top: 35%;
 width: 0;
}
.amazonmenu > ul li.hassub.selected > a::after {
 border-left-color: red;
}
.amazonmenu ul li a:hover, .amazonmenu ul li.hassub.selected > a {
background: lightblue;
color: navy;
}
.amazonmenu ul li > div, .amazonmenu ul li > ul {
background: white;
border: 1px solid gray;
border-radius: 0 8px 8px 0;
box-shadow: 2px 2px 2px gray;
display: none;
font-weight: normal;
width: 300px;
height: 400px;
left: 100%;
padding: 10px;
position: absolute;
top: 0;
-webkit-box-sizing: border-box;
-moz-box-sizing: border-box;
box-sizing: border-box;
z-index: 1000;
}
/* CSS Media queries */
@media screen and (max-width: 480px) {
 .amazonmenu ul li > div, .amazonmenu ul li > ul {
 left: 30px;
}
.amazonmenu > ul li.hassub.selected::after {
 background: #eee;
 content: '';
 height: 100%;
 left: 0;
 opacity: .8;
 pointer-events: none;
 position: absolute;
 top: 0;
 width: 100%;
 z-index: 1;
}
}
</style>
<script src="jquery-1.9.1.min.js"></script>
<script>
document.createElement("nav") // for IE
var amazonmenu = {
 defaults: {
  animateduration: 100,
  showhidedelay: [100, 100],
  hidemenuonclick: true
 },
 setting: {},
 menuzindex: 1000,
 touchenabled: !!('ontouchstart' in window) || !!('ontouchstart' in document.documentElement) || !!window.ontouchstart || !!window.Touch || !!window.onmsgesturechange || (window.DocumentTouch && window.document instanceof window.DocumentTouch),
 showhide:function($li, action, setting){
  clearTimeout( $li.data('showhidetimer') )
  if (action == 'show'){
   $li.data().showhidetimer = setTimeout(function(){
    $li.addClass('selected')
    $li.data('$submenu')
     .data('fullyvisible', false)
     .css({zIndex: amazonmenu.menuzindex++})
     .fadeIn(setting.animateduration, function(){
      $(this).data('fullyvisible', true)
     })
    }, this.setting.showhidedelay[0])
  }
  else{
   $li.data().showhidetimer = setTimeout(function(){
    $li.removeClass('selected')
    $li.data('$submenu').stop(true, true).fadeOut(setting.animateduration)
    var $subuls = $li.data('$submenu').find('.issub').css({display: 'none'})
    if ($subuls.length > 0){
     $subuls.data('$parentli').removeClass('selected')
    }
   }, this.setting.showhidedelay[1])
  }
 },
 setupmenu:function($menu, setting){
  var $topul = $menu.children('ul:eq(0)')
  function addevtstring(cond, evtstr){
   return (cond)&#63; ' ' + evtstr : ''
  }
  $topul.find('li>div, li>ul').each(function(){ // find drop down elements
   var $parentli = $(this).parent('li')
   var $dropdown = $(this)
   $parentli
    .addClass('hassub')
    .data({$submenu: $dropdown, showhidetimer: null})
    .on('mouseenter click', function(e){
     amazonmenu.showhide($(this), 'show', setting)
    })
    .on('click', function(e){
     e.stopPropagation()
    })
    .children('a').on('click', function(e){
     e.preventDefault() // prevent menu anchor links from firing
    })
   $dropdown
    .addClass('issub')
    .data({$parentli: $parentli})
    .on('mouseleave' + addevtstring(setting.hidemenuonclick || amazonmenu.touchenabled, 'click'), function(e){
     if ($(this).data('fullyvisible') == true){
      amazonmenu.showhide($(this).data('$parentli'), 'hide', setting)
     }
     if (e.type == 'click'){
      e.stopPropagation()
     }
    })
  }) // end find
  $topul.on('click', function(e){
   if ($(this).data('fullyvisible') == true){
    amazonmenu.showhide($(this).children('li.hassub.selected'), 'hide', setting)
   }
  })
  var $mainlis = $topul.children('li.hassub').on('mouseleave', function(){
   amazonmenu.showhide($(this), 'hide', setting)  
  })
 },
 init:function(options){
  var $menu = $('#' + options.menuid)
  this.setting = $.extend({}, options, this.defaults)
  this.setting.animateduration = Math.max(50, this.setting.animateduration)
  this.setupmenu($menu, this.setting)
 }
}
</script>
<script>
jQuery(function(){
 amazonmenu.init({
  menuid: 'mysidebarmenu'
 })
})
</script>
</head>
<body>
<nav id="mysidebarmenu" class="amazonmenu">
 <ul>
 <li><a href="#">Item 1</a></li>
 <li><a href="#">Folder 0</a>
  <div>
   <p>Browse our spring collection of useful webmaster tools and resources! </p>
   <ul>
   <li><a href="#">JavaScript</a></li>
   <li><a href="#">CSS类</a></li>
   <li><a href="#">CSS库</a>
   <li><a href="#">网站工具</a>
   <div>
   <p><h3><a href="#">Image Optimizer</a></h3>Use this tool to easily optimize regular gifs, animated gifs. </p>
   <p><h3><a href="#">我的收藏夹</a></h3>Generate a favicon using any regular image with this tool. </p>
   <p><h3><a href="#">动画GIF</a></h3>Animated Gif Generator lets you easily create an animated gif。</p>
   </div>
   <li><a href="#">PHP程序设计</a></li>
   </ul>
  </div>
 </li>
 <li><a href="#">Folder 1</a>
  <ul>
  <li><a href="#">Sub Item 1.1</a></li>
  <li><a href="#">Sub Item 1.2</a></li>
  <li><a href="#">Sub Item 1.3</a>
   <ul>
    <li>Sub Item 1.3.1</li>
    <li>Sub Item 1.3.2</li>
    <li>Sub Item 1.3.3</li>
   </ul>
  </li>
  <li><a href="#">Sub Item 1.4</a></li>
  <li><a href="#">Sub Item 1.2</a></li>
  <li><a href="#">Sub Item 1.3</a></li>
  <li><a href="#">Sub Item 1.4</a></li>
  </ul>
 </li>
 <li><a href="#">Item 3</a></li>
 <li><a href="#">Folder 2</a>
  <ul>
  <li><a href="#">Sub Item 2.1</a></li>
  <li><a href="#">Sub Item 2.1</a></li>
  <li><a href="#">Sub Item 2.1</a></li>
  <li><a href="#">Sub Item 2.1</a></li>
  <li><a href="#">Sub Item 2.1</a></li>
  <li><a href="#">Sub Item 2.1</a></li>
  </ul>
 </li>
 <li><a href="#">Item 4</a></li>
 </ul>
</nav>
</body>
</html>

I hope this article will be helpful to everyone’s jquery programming design.

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