代码如下
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
*{
margin: 0;
padding: 0;
box-sizing: border-box;
}
.box{
width: 400px;
height: 300px;
border: 2px solid;
position: absolute;
left: 0;
top: 0;
right: 0;
bottom: 0;
margin: auto;
}
.header{
height: 50px;
}
.header span{
height: 50px;
float: left;
display: block;
width: 25%;
border: 2px solid;
text-align: center;
font: 24px/50px "宋体";
}
.content{
width: 100%;
height: 250px;
}
.content div{
width: 100%;
height: 100%;
background: pink;
display: none;
}
.active{
background: green;
}
.show{
display: block!important;
}
</style>
</head>
<body>
<div class="box">
<div class="header">
<span class="active">首页</span>
<span>购物车</span>
<span>推荐</span>
<span>我的</span>
</div>
<div class="content">
<div class="show">我是首页呵呵</div>
<div>我是购物车呵呵</div>
<div>我是推荐呵呵</div>
<div>我是我的呵呵</div>
</div>
</div>
<script>
var spans = document.querySelectorAll(".header span")
var divs = document.querySelectorAll(".content div")
// 第二个版本
for(var i = 0; i < spans.length; i++){
spans[i].setAttribute("data-id",i)
spans[i].onclick = function () {
for (var j = 0; j < spans.length;j++){
spans[j].classList.remove("active")
divs[j].classList.remove("show")
}
this.classList.add("active")
var index = this.getAttribute("data-id")
console.log(index)
divs[index].classList.add("show")
}
}
//第一版
// for (var i = 0; i < spans.length; i++){
// click(i)
// }
//
//
// function click(i) {
// spans[i].onclick = function () {
// for (var j = 0; j < spans.length; j++){
// spans[j].classList.remove("active")
// divs[j].classList.remove("show")
// }
// this.classList.add("active")
// divs[i].classList.add("show")
// }
// }
</script>
</body>
</html>
原文：https://www.cnblogs.com/daifuchao/p/11761106.html