jquery实现带渐变淡入淡出并向右依次展开的多级菜单效果实例

司徒正信

2023-03-14

本文向大家介绍jquery实现带渐变淡入淡出并向右依次展开的多级菜单效果实例，包括了jquery实现带渐变淡入淡出并向右依次展开的多级菜单效果实例的使用技巧和注意事项，需要的朋友参考一下

本文实例讲述了jquery实现带渐变淡入淡出并向右依次展开的多级菜单效果。分享给大家供大家参考。具体如下：

这是一款核心基于jquery的多级导航菜单特效，横向向右依次展开菜单项，当然本菜单并不是完美的，因此没有怎么美化，另外包括子菜单的上级菜单中缺少一个菜单标记，这样用户有时候不知道哪个菜单中含有下级子菜单。不过添加这样一个标记似乎挺简单，你可以自己动手添加吧。

运行效果截图如下：

在线演示地址如下：

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

具体代码如下：

<!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)? ' ' + 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>

希望本文所述对大家的jquery程序设计有所帮助。

jquery实现带渐变淡入淡出并向右依次展开的多级菜单效果实例

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