jQuery implements folding and expanding menu group effect code

jQuery implements folding and expanding menu group effect code_jquery

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Release： 2016-05-16 15:39:01

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The example in this article describes the jQuery code to implement folding and expanding menu group effects. Share it with everyone for your reference. The details are as follows:

This is a beautiful vertical folding menu group implemented by jQuery. Please refresh the page when running it for the first time and let jQ load. This menu is widely used and can be used on the left side of the background and the front desk of the website. Found it on Tencent Weibo open platform, share it with everyone to study together. Tip: If there are errors, please refresh the page.

The screenshot of the running effect is as follows:

The online demo address is as follows:

http://demo.jb51.net/js/2015/jquery-fade-in-out-menu-group-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>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>一个展开合拢的菜单效果</title>
<script type="text/javascript" src="jquery-1.6.2.min.js"></script>
<style>
* { margin:0; padding:0; }
ul,li { list-style:none; }
.catalog { width:164px; margin:0 auto;}
.t1 { height:4px; background:url(images/bg_catalog.gif) left top no-repeat; }
.t2 { background:url(images/bg_catalog.gif) -164px top repeat-y; }
.t3 { height:4px; background:url(images/bg_catalog.gif) left bottom no-repeat; }
.t2 h2 { height:81px; background:url(images/bg_catalog_logo.gif) center no-repeat; text-indent:-9999px; }
.t2 h3 { heigth:36px; line-height:36px; margin:0 1px; text-indent:26px; background:url(images/bg_catalog_icon.gif) no-repeat 13px 14px; font-size:14px; border-top:1px solid #fFF; }
.t2 ul { padding:10px 0; font-size:12px; }
.t2 li { text-indent:27px; height:30px; line-height:30px; }
.selected { display:block;}
.unselected {display:none;}
</style>
</head>
<body>
<div class="re_left">
<div class="catalog">
<div class="t1"></div> 
<div class="t2">
 <h2>资源</h2>
 <h3><a href="javascript:void(0);" src="#">平台使用说明</a></h3>
 <ul class="unselected">
 <li><a href="#">平台介绍</a></li>
 <li><a href="#">应用开发说明</a></li>
 <li><a href="#">应用审核流程</a></li>
 <li style="display:none;"><a href="#">成功案例</a></li>
 <li><a href="#">开发者协议</a></li>
 </ul>
 <h3><a href="javascript:void(0);" src="#">API说明</a></h3>
 <ul class="unselected">
 <li><a href="#">API文档</a></li>
 <li><a href="#">Oauth授权说明</a></li>
 <li><a href="#">API调用权限</a></li>
 </ul>
 <h3><a href="javascript:void(0);" src="#">SDK及资源下载</a></h3>
 <ul class="unselected">
 <li><a href="#">SDK下载</a></li>
 <li><a href="#">视觉素材下载</a></li>
 </ul>
 <h3><a href="javascript:void(0);" src="#">帮助中心</a></h3>
 <ul class="unselected">
 <li><a href="#">常见问题解答</a></li>
 <li><a href="#">返回错误码说明</a></li>
 </ul>
</div>
<div class="t3"></div>
</div>
</div>
<script type="text/javascript">
 $(document).ready(function(){
 var catalogIndex=[0,0];
 if (catalogIndex[0]==2){catalogIndex[0]=3;}
 else if(catalogIndex[0]==3){catalogIndex[0]=2;}
 if(catalogIndex.length==0){catalogIndex=[0,0];}
 $(".re_left .catalog h3 a").each(function(){
  $(this).attr("src",$(this).attr("href"));
  });
 $(".re_left .catalog").find("ul").css("border-bottom",0).end().find("h3:eq("+catalogIndex[0]+")").addClass("open").find("a").attr("href","javascript:void(0);").end().next().css("display","block").find("li:eq("+(catalogIndex[1]-1==-1&#63;9999:catalogIndex[1]-1)+")").addClass("active");$(".re_left .catalog").find("h3").last().css("border-bottom-width","0");});
$(".re_left .catalog").find("h3").bind("click",function(){
  if ($(this).hasClass("open"))
  {
  if ($(this).next().find(".active").size()==0)
  {
   $(this).next().slideUp(500,function(){
   $(this).prev().removeClass("open");
   }); 
  }
  else
  {
   $(this).next().slideUp(500,function(){
   $(this).prev().removeClass("open");
   //window.location.href=$(this).prev().find("a").attr("src");
   });
  }
  }
  else
  {
  $(this).parent().find("ul").slideUp("slow").end().find("h3").removeClass("open");
  $(this).addClass("open").next().slideDown(500,function(){
  if ($(this).nextAll("h3").size()>0)
  {$(this).parent().find("h3").last().css("border-bottom-width","1px");}
  else
  {$(this).parent().find("h3").last().css("border-bottom-width","0");}
  window.location.href=$(this).prev().find("a").attr("src");
  });
  }
  return false;
}); 
</script>
<br><div align="center">提示：如果有错误，请刷新页面。</div>
</body>
</html>

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