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jquery implements the complete code of tree menu_jquery

WBOYOriginal: 2016-05-16 15:22:441541browse

This example implements a tree-shaped dynamic menu and is compatible with IE8, Firefox, Chrome and other browsers. jQuery's toggle() method is used. The effect and code are 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>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>jquery的树形菜单代码 </title>
<meta name="keywords" content="www.cnblogs.com/jihua"/>
<style type="text/css">
body { font-family:"宋体"; font-size: 12px; line-height: 1.5em; color:#7FB0C8; padding:0; margin:0; background: #336699;}
ul,ol,li,dl,dt,dd { margin:0; padding:0; list-style-type:none;}
h1,h2,h3,form,input,iframe,span { margin:0; padding:0;} 
a { color:#7FB0C8;}
a:link {color: #7FB0C8; TEXT-DECORATION: none;}
a:visited {color: #7FB0C8; TEXT-DECORATION: none;}
a:hover {color: #fff; TEXT-DECORATION: none;}
.white { color:#fff;}
.white a:link {color: #fff; TEXT-DECORATION: none;}
.white a:visited {color: #fff; TEXT-DECORATION: none;}
.white a:hover {color: #73E1F5; TEXT-DECORATION: none;}
/* 树形菜单开始 */
.close { float:right; clear:right; font-size:12px; font-weight:normal; cursor:pointer; padding-right:10px;}
.title { font-size:14px; color:#fff; margin-bottom:10px; padding-left:5px; width:290px;}
.menu { width:290px; height:330px; margin-bottom:10px;}

.l1 { background:#000; font-size:13px; padding:5px 0 0 30px; height:20px; margin-bottom:5px; cursor:pointer;}
.slist { margin:0 0 5px 0; display:none;}
.l2 { padding:0 0 0 35px; font-size:13px;}
.l2 a { padding:6px 0 0 5px; width:230px; height:21px; display:block;} 
.currentl2 a,.l2 a:hover { background:#1E5A82; color:#fff;}
.sslist { background:#156890; width:235px; overflow:hidden; margin:0 0 5px 35px; display:none;}
.l3 a { padding:6px 0 0 5px; width:230px; height:20px; display:block;} 
.currentl3 a,.l3 a:hover { color:#fff; font-weight:bold;}
</style>
<script type="text/javascript" src="http://keleyi.com/keleyi/pmedia/jquery/jquery-1.4.2.min.js"></script>
<script type="text/javascript">
 // 树状菜单
 $(document).ready(function () {
 $(".l1").toggle(function () {
  $(".slist").animate({ height: 'toggle', opacity: 'hide' }, "slow");
  $(this).next(".slist").animate({ height: 'toggle', opacity: 'toggle' }, "slow");
 }, function () {
  $(".slist").animate({ height: 'toggle', opacity: 'hide' }, "slow");
  $(this).next(".slist").animate({ height: 'toggle', opacity: 'toggle' }, "slow");
 });

 $(".l2").toggle(function () {
  $(this).next(".sslist").animate({ height: 'toggle', opacity: 'toggle' }, "slow");
 }, function () {
  $(this).next(".sslist").animate({ height: 'toggle', opacity: 'toggle' }, "slow");
 });

 $(".l2").click(function () {
  $(".l3").removeClass("currentl3");
  $(".l2").removeClass("currentl2");
  $(this).addClass("currentl2");
 });

 $(".l3").click(function () {
  $(".l3").removeClass("currentl3");
  $(this).addClass("currentl3");
 });

 $(".close").toggle(function () {
  $(".slist").animate({ height: 'toggle', opacity: 'show' }, "fast");
  $(".sslist").animate({ height: 'toggle', opacity: 'show' }, "fast");
 }, function () {
  $(".slist").animate({ height: 'toggle', opacity: 'hide' }, "fast");
  $(".sslist").animate({ height: 'toggle', opacity: 'hide' }, "fast");
 });
 });
</script>
</head>
<body>
<h1 class="title"><span class="close">全部收起/展开</span>Jihua树形菜单</h1>
<div class="menu">
 <h1 class="l1">一级菜单</h1>
 <div class="slist">
 <h2 class="l2"><a href="#">二级菜单</a></h2>
 <ul class="sslist">
 <li class="l3"><a href="#">·三级菜单</a></li>
 <li class="l3"><a href="#">·三级菜单</a></li>
 <li class="l3"><a href="#" target="_blank">·jihua.cnblogs.com</a></li>
 <li class="l3"><a href="#">·三级菜单</a></li>
 </ul>
 <h2 class="l2"><a href="#">二级菜单</a></h2>
 <ul class="sslist">
 <li class="l3"><a href="#">·三级菜单</a></li>
 <li class="l3"><a href="#">·三级菜单</a></li>
 <li class="l3"><a href="#" target="_blank">·三级菜单</a></li>
 <li class="l3"><a href="#">·三级菜单</a></li>
 </ul>
 <h2 class="l2"><a href="#">二级jb51.net</a></h2>
 </div>
 <h1 class="l1">一级脚本</h1>
 <div class="slist">
 <h2 class="l2"><a href="#">二级菜单计划</a></h2>
 <h2 class="l2"><a href="#">二级菜单</a></h2>
 <h2 class="l2"><a href="#">二级菜单</a></h2>
 </div>
 <h1 class="l1">一级菜单</h1>
 <div class="slist">
 <h2 class="l2"><a href="#">二级菜单</a></h2>
 <h2 class="l2"><a href="#">二级菜单</a></h2>
 <h2 class="l2"><a href="#">二级菜单</a></h2>
 </div>
</div>
</body>
</html>

This example uses jquery’s toggle() method, which is introduced as follows:

Definition and usage

The

toggle() method switches the visible state of an element.

Hide the selected elements if they are visible, and show them if the selected elements are hidden.

Grammar
$(selector).toggle(speed,callback,switch)

Tips and Notes

Note: This effect works on elements hidden via jQuery, or elements declared with display:none in CSS (but not elements with visibility:hidden ).

The above is the complete code for jquery to implement tree menu. I hope it will be helpful for everyone to learn jquery programming.

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