<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
* {
margin: 0;
padding: 0;
}
.btn {
width: 70px;
box-shadow: 5px 5px 5px rgba(194, 187, 82, 0.712);
}
.active {
background: pink;
}
.wrap-main>div {
width: 200px;
height: 200px;
border: 1px solid #333;
font-size: 30px;
font-weight: 900px;
text-align: center;
line-height: 200px;
display: none
}
.wrap-main>div>img {
width: 250px;
height: 250px;
}
</style>
</head>
<body>
<div class="wrap">
<div class="wrap-head">
<button class="btn active">1</button>
<button class="btn">2</button>
<button class="btn">3</button>
</div>
<div class="wrap-main">
<div class="content" style="display: block;"><img src="./01.jpg" alt=""></div>
<div class="content"><img src="./02.jpg" alt=""></div>
<div class="content"><img src="./05.jpg" alt=""></div>
</div>
</div>
<div class="wrap">
<div class="wrap-head">
<button class="btn active">1</button>
<button class="btn">2</button>
<button class="btn">3</button>
</div>
<div class="wrap-main">
<div class="content" style="display: block;"><img src="./01.jpg" alt=""></div>
<div class="content"><img src="./02.jpg" alt=""></div>
<div class="content"><img src="./05.jpg" alt=""></div>
</div>
</div>
<div class="wrap">
<div class="wrap-head">
<button class="btn active">1</button>
<button class="btn">2</button>
<button class="btn">3</button>
</div>
<div class="wrap-main">
<div class="content" style="display: block;"><img src="./01.jpg" alt=""></div>
<div class="content"><img src="./02.jpg" alt=""></div>
<div class="content"><img src="./05.jpg" alt=""></div>
</div>
</div>
<script>
function tab(wrap) {
var btns = wrap.querySelectorAll("button");
var divs = wrap.querySelectorAll(".content");
for (var i = 0; i < btns.length; i++) {
btns[i].index = i;//自定义属性，作为下标
btns[i].onclick = function () {
for (var i = 0; i < btns.length; i++) {
btns[i].classList.remove("active");
divs[i].style.display = "none";
}
this.classList.add("active");
divs[this.index].style.display = "block";
}
}
}
var wraps = document.querySelectorAll(".wrap");
for (var i = 0; i < wraps.length; i++) {
tab(wraps[i]);
}
</script>
</body>
</html>
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