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jQuery implements multi-level drop-down menu code with animated effects_jquery

WBOY
WBOYOriginal
2016-05-16 15:40:041582browse

The example in this article describes the jQuery implementation of multi-level drop-down menu code with animated effects. Share it with everyone for your reference. The details are as follows:

This is a multi-level drop-down menu based on jQuery, with animation effects. All elements are nested in the loop format of ul li ul li ul li. If there is no lower-level classification, use li a to end the nesting. There is no need in the code. The reason for toggle() is to hide all elements after the menu's subordinate menus when shrinking the menu.

The screenshot of the running effect is as follows:

The online demo address is as follows:

http://demo.jb51.net/js/2015/jquery-animate-style-down-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>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>jQuery多级下拉菜单</title>
<script language="javascript" type="text/javascript" src="jquery1.3.2.js"></script>
<style type="text/css">
ul,li{
list-style:none;
font-size:12px;
line-height:20px;
width:80px;
margin:0;
padding-left:6px;
}
.child{
 display:none;
}
.nav a{
display:block;
color:#5c84c1;
padding-left:22px;
}
</style>
<script language="javascript" type="text/javascript">
 //说明 所有的元素以ul li ul li ul li的循环格式嵌套 如果没有下级分类 就用li a结束嵌套
 $(document).ready(function(){
 //$(".nav ul li").children("ul").hide();
  $(".nav").find("li").not(":has(ul)").children("a").css({textDecoration:"none",color:"#333",background:"none"})
  .click(function(){
  $(this).get(0).location.href="'"+$(this).attr("href")+"'";
  });
 $(".nav").find("li:has(ul)").children("a").css({background:"url(images/statu_close.gif) no-repeat left top;"})
  .click(function(){
  if($(this).next("ul").is(":hidden")){  
  $(this).next("ul").slideDown("slow");
  if($(this).parent("li").siblings("li").children("ul").is(":visible")){
  $(this).parent("li").siblings("li").find("ul").slideUp("1000");
  $(this).parent("li").siblings("li:has(ul)").children("a").css({background:"url(images/statu_close.gif) no-repeat left top;"})
   .end().find("li:has(ul)").children("a").css({background:"url(images/statu_close.gif) no-repeat left top;"});}
  $(this).css({background:"url(images/statu_open.gif) no-repeat left top;"});
  return false;
 }else{
  $(this).next("ul").slideUp("normal"); 
  //不用toggle()的原因是为了在收缩菜单的时候同时也将该菜单的下级菜单以后的所有元素都隐藏
  $(this).css({background:"url(images/statu_close.gif) no-repeat left top;"});
  $(this).next("ul").children("li").find("ul").fadeOut("normal");
  $(this).next("ul").find("li:has(ul)").children("a").css({background:"url(images/statu_close.gif) no-repeat left top;"});
  return false;
  }
  });
 });
</script>
</head>
<body>
<div class="nav">
 <ul>
 <li>
  <a href="#">一级菜单1</a>
  <ul class="child">
  <li>
   <a href="#">二级菜单1</a>
   </li>
   <li>
   <a href="#">二级菜单1</a>
   <ul class="child">
   <li>
   <a href="#">三级菜单1</a>
   </li>
   <li>
   <a href="#">三级菜单1</a>
   </li>
   </ul>
   </li>
   <li>
   <a href="#">二级菜单2</a>
   <ul class="child">
   <li>
   <a href="#">三级菜单2</a>
   </li>
   <li>
   <a href="#">三级菜单2</a>
   <ul class="child">
    <li>
    <a href="#">四级菜单</a>
    </li>
    <li>
    <a href="#">四级菜单1</a>
    </li>
    <li>
    <a href="#">四级菜单1</a>
    <ul class="child">
    <li>
     <a href="#">五级菜单1</a>
     </li>
     <li>
     <a href="#">五级菜单1</a>
     </li>
     <li>
     <a href="#">五级菜单1</a>
     </li>
    </ul>
    </li>
   </ul>
   </li>
   </ul>
   </li>
  </ul>
  </li>
  <li>
  <a href="#">一级菜单2</a>
  <ul class="child">
  <li>
   <a href="#">二级菜单1</a>
   </li>
   <li>
   <a href="#">二级菜单1</a>
   </li>
  </ul> 
  </li>
  <li>
  <a href="#">一级菜单3</a>
  <ul class="child">
  <li>
   <a href="#">二级菜单1</a>
   </li>
   <li>
   <a href="#">二级菜单1</a>
   </li>
  </ul>
  </li>
  <li>
  <a href="#">一级菜单4</a>
  </li>
 </ul>
</div>
</body>
</html>

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

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