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Classic file tree menu effect implemented in JavaScript_javascript skills

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May 16, 2016 pm 03:40 PM

javascriptmenu

The example in this article describes the classic file tree menu effect implemented in JavaScript. Share it with everyone for your reference. The details are as follows:

This is a simple JavaScript file tree menu. It is a classic tree menu, especially the folder style. The folding and expansion are also smooth and natural. However, this menu has a shortcoming, which is the data writing of the menu. In the JS array, this will cause some trouble in modifying the menu content.

Let’s take a look at the screenshots of the running effect:

The online demo address is as follows:

http://demo.jb51.net/js/2015/js-file-tree-style-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>简单的文件树效果</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<style type="text/css">
.tree{width:200px;border:2px inset #fff;height:400px;padding:5px;overflow:auto;}
.tree dd,.tree dt, .tree dl{margin:0;padding:0;overflow:hidden;}
.tree dd{margin-left:18px;}
.tree dt{background:url(images/tree-bg.png) no-repeat 0 0px;padding-left:35px;line-height :20px;height:20px;}
.tree dt.node-close{background-position: 0 -24px;}
.tree dt.node-open{background-position: 0 -58px;}
.tree dt a{color:#000;text-decoration:none;font: 12px/1 verdana;line-height :12px;_line-height :16px;}
.tree dt a:hover{background:#0A246A;color:#fff;}
</style>
</head>
<body>
<div id="esunTree" class="tree"></div>
</body>
<script type="text/javascript">
try{document.execCommand("BackgroundImageCache",false,true)}catch(e){};
function Tree(data, el) {
 this.app=function(par,tag){return par.appendChild(document.createElement(tag))};
 this.create(document.getElementById(el),data)
};
Tree.fn = Tree.prototype = {
 create: function (par,group){
  var host=this, length = group.length;
  for (var i = 0; i < length; i++) {
   var dl =this.app(par,'DL'), dt = this.app(dl,'DT'), dd = this.app(dl,'DD');
   dt.innerHTML='<a href="javascript:void(0)">'+group[i]['t']+'</a>';
   if (!group[i]['s'])continue;
   dt.group=group[i]['s'];
   dt.className+=" node-close";
   dt.onclick=function (){
    var dd= this.nextSibling;
    if (!dd.hasChildNodes()){
      host.create(dd,this.group);
      this.className='node-open'
     }else{
     var set=dd.style.display=='none'&#63;['','node-open']:['none','node-close'];
      dd.style.display=set[0];
      this.className=set[1]
     }
   }
  }
 }
};
var data=[{
  t:'腾讯网络限公司',s:[
   {t:'人力资源',s:[{t:'张A'}]},
   {t:'风险控制',s:[{t:'李B'},{t:'赵C'},{t:'吴D'},{t:'司马E'},{t:'潭F'},{t:'袁G'}]},
   {t:'系统平台',s:[{t:'资讯组',s:[{t:'王五'}]},{t:'游戏组',s:[{t:'肖十三'}]}]}
  ]
 },
 {t:'拍拍网',s:[{t:'胡一刀'}]},
 {t:'盛大网络',s:[{t:'热血传奇',s:[{t:'在线充值'}]},{t:'陈天桥'}]},
 {t:'新浪微博',s:[{t:'凤姐'}]}
];
var et=new Tree(data,'esunTree');
 //]]>
</script>
</html>

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

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