Native JS implements Taobao-like product classification menu effect code on the left side

Native JS implements Taobao-like product classification menu effect code on the left side_javascript skills

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Release： 2016-05-16 15:39:48

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This article describes the example of using native JS to imitate the effect code of the product classification menu on the left side of Taobao. Share it with everyone for your reference. The details are as follows:

This is a native JS-like Taobao product classification menu effect code on the left, implemented with JavaScript technology and compatible with all mainstream browsers. Modify the CSS menu yourself and it will become more beautiful.

A screenshot of the running effect is as follows:

The online demo address is as follows:

http://demo.jb51.net/ js/2015/js-f-taobao-pro-menu-style-codes/

The specific code is as follows:

<!DOCTYPE html>
<head>
<title>仿淘宝网左侧的商品分类菜单代码</title> 
</head>
<body>
<style>
html{color:#000;background:#FFF}body,div,dl,dt,dd,ul,ol,li,h1,h2,h3,h4,h5,h6,pre,code,form,fieldset,legend,
input,button,textarea,select,p,blockquote,th,td{margin:0;padding:0}
table{border-collapse:collapse;border-spacing:0}
fieldset,img{border:0}address,button,caption,cite,code,dfn,em,input,optgroup,option,select,strong,
textarea,th,var{font:inherit}del,ins{text-decoration:none}li{list-style:none}caption,
th{text-align:left}h1,h2,h3,h4,h5,h6{font-size:100%;font-weight:normal}q:before,q:after{content:&#39;&#39;}abbr,
acronym{border:0;font-variant:normal}sup{vertical-align:baseline}sub{vertical-align:baseline}legend{color:#000}
 .hidden{display:none;}
.sub-col{position:relative;z-index:999;}
.category{width:230px;border:1px solid #8A0E00;}
.category h3 {height:30px;line-height:30px;text-indent:15px;background:#A91319;color:#fff;}
.category ul li{height:30px;line-height:30px;text-indent:35px;background:#FFF8F6 url(arrow-r.png) 
no-repeat 205px center;border-bottom:1px solid 
#ECECEC;border-top:1px solid #fff;cursor:pointer;color:#A71F37;} 
.category ul li:hover{background-color:#8A0E00;color:#fff;}
.pop-category{border:2px solid #8A0E00;background:#FDF5F5;position:absolute;left:200px;top:40px;z-index:1000;}
.pop-category .sub-item{width:390px;height:350px;}
</style>
<div class="wrapper">
<div class=&#39;sub-col&#39;>
<div class="category">
   <h3>所有商品分类</h3>
   <ul id="J_category" class="item">
    <li>潮流服饰</li>
    <li>精品鞋包</li>
    <li>美容护肤</li>
    <li>珠宝饰品</li>
    <li>运动户外</li>
    <li>手机数码</li>
    <li>居家生活</li>
    <li>家电家装</li>
    <li>母婴用品</li>
    <li>食品保健</li>
   </ul>
   <div id="J_popCategory" class="pop-category hidden">
    <div class=&#39;sub-item&#39; style=&#39;display:none;&#39;>潮流服饰</div>
    <div class=&#39;sub-item&#39; style=&#39;display:none;&#39;>精品鞋包</div>
    <div class=&#39;sub-item&#39; style=&#39;display:none;&#39;>美容护肤</div>
    <div class=&#39;sub-item&#39; style=&#39;display:none;&#39;>珠宝饰品</div>
    <div class=&#39;sub-item&#39; style=&#39;display:none;&#39;>运动户外</div>
    <div class=&#39;sub-item&#39; style=&#39;display:none;&#39;>手机数码</div>
    <div class=&#39;sub-item&#39; style=&#39;display:none;&#39;>居家生活</div>
    <div class=&#39;sub-item&#39; style=&#39;display:none;&#39;>家电家装</div>
    <div class=&#39;sub-item&#39; style=&#39;display:none;&#39;>母婴用品</div>
    <div class=&#39;sub-item&#39; style=&#39;display:none;&#39;>食品保健</div>
   </div>
  </div>
 </div>
 </div>
 <script type="text/javascript">
//get element&#39;s id with &#39;$(id)&#39; method
function $(){
 var elements = new Array();
 for (var i = 0; i < arguments.length; i++) {
 var element = arguments[i];
 if (typeof element == &#39;string&#39;) 
  element = document.getElementById(element);
 if (arguments.length == 1) 
  return element;
 elements.push(element);
 }
 return elements;
}
//get ele&#39;s className
function getElementsByClassName(className, tagName){
 var ele = [], all = document.getElementsByTagName(tagName || &#39;*&#39;);
 for (var i = 0; i < all.length; i++) {
 if (all[i].className == className) {
  ele[ele.length] = all[i];
 }
 }
 return ele;
}
</script>
 <script type=&#39;text/javascript&#39;>
 var category=$(&#39;J_category&#39;),popCategory=$(&#39;J_popCategory&#39;),
 cateLi=category.getElementsByTagName(&#39;li&#39;),subItems=getElementsByClassName(&#39;sub-item&#39;,&#39;div&#39;);
 category.onmouseover=function(){
  popCategory.style.display=&#39;block&#39;;
 };
 category.onmouseout=function(){
  popCategory.style.display=&#39;none&#39;;
 };
 for(var i=0; i<cateLi.length; i++){
  cateLi[i].index=i;
  cateLi[i].onmouseover=function(){
   for(var j=0; j<subItems.length; j++){
    subItems[j].style.display=&#39;none&#39;;
   }
   subItems[this.index].style.display=&#39;block&#39;;
  };
 }
 </script>
</body>
</html>

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