纵向轮播图的封装
本人纯原生手写！！
<!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;}
a{text-decoration: none;}
.container{
position: relative;
width: 360px;
height: 660px;
margin:300px auto 0 auto;
background-color: #666;
box-shadow: 0 0 5px green;
overflow: hidden;
}
.wrap{
position: absolute;
height: 1428px;
width: 308px;
z-index: 1;
background-color: purple;
margin-left: 26px;
}
.img{
/* float: left; */
width: 308px;
height: 178px;
line-height: 178px;
font-size: 50px;
text-align: center;
margin-top: 26px;
}
.arrow{
position: absolute;
width: 110px;
height: 30px;
line-height: 30px;
border: 1px solid #C2000B;
font-size: 24px;
border-radius: 10px;
bottom: 5px;
z-index: 2;
padding:0px 14px;
color: red;
background-color: rgba(0,0,0,0.2);
text-align: center;
}
.arrow_top{
left: 26px;
background-color: #fff;
}
.arrow_bottom{
right: 26px;
color: #fff;
background-color: #C2000B;
}
</style>
</head>
<body>
<div class="container">
<div class="wrap" style="top: -204px">
<div class="img" style="background: cyan;">5</div>
<div class="img" style="background: red;">1</div>
<div class="img" style="background: orange;">2</div>
<div class="img" style="background: yellow;">3</div>
<div class="img" style="background: green;">4</div>
<div class="img" style="background: cyan;">5</div>
<div class="img" style="background: red;">1</div>
</div>
<a href="javascript:;" class="arrow arrow_top">↓</a>
<a href="javascript:;" class="arrow arrow_bottom">↑</a>
</div>
</body>
<script>
var wrap = document.querySelector('.wrap');
var next = document.querySelector('.arrow_top');
var prev = document.querySelector('.arrow_bottom');
console.log(wrap, prev, next);
next.onclick = function () {
console.log('下');
next_pic();
}
prev.onclick = function () {
console.log('上');
prev_pic();
}
// 点击下一张
function next_pic () {
var newTop;
if (wrap.style.top === '-816px') {
newTop = 0;
} else {
newTop = parseInt(wrap.style.top) -204;
}
wrap.style.top = newTop + "px";
}
// 点击上一张
function prev_pic () {
var newTop;
if (wrap.style.top === "0px") {
newTop = -816;
} else {
newTop = parseInt(wrap.style.top) + 204;
}
wrap.style.top = newTop + "px";
}
</script>
</html>
