试着用原生JS实现TAB切换效果。看下DEMO，如下：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>试着用原生JS实现TAB切换效果 - Web前端之家</title>
<style>
.bgbox{
width: 500px;
margin:50px auto;
}
.tab-top {
width: 500px;
margin:auto;
font-size:0;
}
ul,li{list-style:none;margin:0;padding:0;}
.tab-top li {
display:inline-block;
font-size:16px;
width: 24%;
line-height: 40px;
border: 1px solid #ccc;
text-align:center
}
.tabbox .boxlist {
display: none;
width: 500px;
height: 200px;
border: 1px solid #ccc;
background: pink;
}
.active {
color: red;
background: #1890ff;
}
</style>
</head>
<body>
<div class="bgbox">
<ul class="clearfix tab-top" id="tabcilk">
<li class="fl active">1</li>
<li class="fl">2</li>
<li class="fl">3</li>
<li class="fl">4</li>
</ul>
<div class="tabbox" id="tabbox">
<div class="boxlist " style="display: block;">1</div>
<div class="boxlist">2</div>
<div class="boxlist">3</div>
<div class="boxlist">4</div>
</div>
</div>
</body>
<script>
var ali = document.getElementById("tabcilk").getElementsByTagName("li");
var adiv = document.getElementById("tabbox").getElementsByTagName("div");
function tab(btn, boxlist) {
for (var i = 0; i < btn.length; i++) {
btn[i].index = i;
btn[i].onclick = function () {
//alert(this.index );
for (var j = 0; j < btn.length; j++) {
btn[j].classList.remove("active")
boxlist[j].style.display = "none";
btn[this.index].classList.add("active");
boxlist[this.index].style.display = "block";
}
}
}
}
tab(ali, adiv);
</script>
</html>
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