<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<style type="text/css">
.tab_list {
width: 900px;
height: 40px;
background-color: #CCCCCC;
border-bottom: 1px solid orangered;
}
.tab_con {
font-size: 14px;
margin-top: 10px;
}
.tab_list li {
width: 130px;
height: 40px;
font-size: 13px;
list-style: none;
line-height: 40px;
margin-left: 30px;
float: left;
text-align: center;
border: none;
}
.goods {
background-color: orangered;
color: #FFFFFF;
}
.item {
display: none;
}
</style>
</head>
<body>
<div id="tab">
<div class="tab_list">
<ul>
<li class="goods">商品介绍</li>
<li>规格与包装</li>
<li>售后与保障</li>
<li>商品评价（4999+）</li>
<li>手机社区</li>
</ul>
</div>
<div class="tab_con">
<div class="item" style="display: block;">
商品介绍模块
</div>
<div class="item">
规格与包装模块
</div>
<div class="item">
售后与保障模块
</div>
<div class="item">
商品评价（4999+）模块
</div>
<div class="item">
手机社区模块
</div>
</div>
</div>
<script type="text/javascript">
var lis = document.querySelector('.tab_list').querySelectorAll('li');
var item = document.querySelectorAll('item');
// console.log(lis);
for (var i = 0; i < lis.length; i++) {
lis[i].setAttribute('index', i);
lis[i].onclick = function() {
for (var i = 0; i < lis.length; i++) {
lis[i].className = '';
}
this.className = 'goods';
var index = this.getAttribute('index');
console.log(index);
for (var i = 0; i < lis.length; i++) {
item[index].style.display = 'none'; //报错代码
}
item[index].style.display = 'block'; //报错代码
}
}
</script>
</body>
</html>
}
}
</script>
</body>
</html>
将var变为let试过了，头发都挠秃了，ball ball 各位友友
