javascript实现的手风琴折叠菜单效果

最新推荐文章于 2024-04-06 09:10:45 发布

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最新推荐文章于 2024-04-06 09:10:45 发布

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文章标签： javascript ViewUI

原文链接：http://www.cnblogs.com/kevinCoder/p/4520024.html

版权

演示地址：http://codepen.io/anon/pen/pJERMq

实现效果：

HTML代码：

<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>手风琴效果</title>
</head>
<body>

<div class="main">

<ul id="expand">
	<li>
	<h3 class="h3-common">第一类目</h3>
    <ul>
    	<li>1</li>
    	<li>2</li>
    	<li>3</li>
    	<li>4</li>
    </ul>
	</li>
	<li>
		<h3 class="h3-common">第二类目</h3>
		<ul>
			<li>5</li>
			<li>6</li>
			<li>7</li>
		</ul>
	</li>
	<li>
	   <h3 class="h3-common">第三类目</h3>
		<ul>
			<li>8</li>
			<li>9</li>
			<li>10</li>
			<li>11</li>
		</ul>
	</li>
	<li>
	   <h3 class="h3-common">第四类目</h3>
		<ul>
			<li>12</li>
			<li>13</li>
			<li>14</li>
			<li>15</li>
		</ul>
	</li>
</ul>

</div>
	
</body>
</html>

CSS代码：

/*
* by @Kevinの快乐时代
 *2015/5/21
*/

*{
     	margin: 0;padding: 0;
     }

     ul,li{
      	list-style: none;
      }

    .main{
    	width: 300px;
    	color:#666;
    	position: absolute;
    	top: 0;
    	right: 0;
    	bottom: 0;
    	left: 0;
    	margin:auto; 
    }

    .main ul li ul{
    	display: none;
    	padding: 15px;
    	background-color: #ecf0f1;
    }

    #expand li ul li {
  padding: 5px 0;
  border-bottom: 1px dotted #999;
}

.h3-common{
	  font-size: 15px;
	   color: #fff;
	   padding: 5px 22px;
	   border-bottom: 1px dotted #e7e7e7;
}

    .main h3{
      
	   background: url(http://www.iconfont.cn/uploads/fonts/font-155705-.png?color=ecf0f1&size=20) no-repeat #00bb9c left center;
    }

    .main h3.active{
    	  background: url(http://www.iconfont.cn/uploads/fonts/font-69084-.png?color=ecf0f1&size=20) no-repeat #ea8010 left center;
    }

    .li_active{
    	background-color: #56abe4;
    	color: #fff;
    	text-align: center;
    	border-radius: 3px;
    }

javascript代码：

	
  var oExpand=document.getElementById('expand');

  var ah3=oExpand.getElementsByTagName('h3');
  var aUl=oExpand.getElementsByTagName('ul');
  var aLi=null;
  var arrLi=[];

for(var i=0;i<ah3.length;i++){

 	ah3[i].index=i;
	ah3[i].οnclick=function(){

		var current_num=this.index;//添加自定义索引值
  
        for(var i=0;i<aUl.length;i++){
            //没被选中的ul折叠起来
        	if(ah3[i] != this){
            ah3[i].className="h3-common";
            aUl[i].style.display="none";
        	}                  
        }

        //展开，收起
		if(!ah3[current_num].classList.contains('active')){
			ah3[current_num].classList.add('active');
			aUl[current_num].style.display='block';
				}else{
			ah3[current_num].classList.remove('active');
			aUl[current_num].style.display='none';
		}
		
	}

}


//添加数组
for(var i=0;i<aUl.length;i++){

  aLi =aUl[i].getElementsByTagName('li');
  for(var j=0;j<aLi.length;j++){

  	arrLi.push(aLi[j]);

  }
}



for(var i=0;i<arrLi.length;i++){

	arrLi[i].οnclick=function(){
		
    //初始化其他li
	for(var i=0;i<arrLi.length;i++){
        if(arrLi[i] !=this){
		arrLi[i].className='';
		}
		}
		
		//元素本身的点击选中，再点击消失；.li_active是选中时的状态
		if(!this.classList.contains('li_active')){
			this.classList.add('li_active');
		}else{
			this.classList.remove('li_active')
		}

	}
}

转载于:https://www.cnblogs.com/kevinCoder/p/4520024.html