<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no" />
<style type="text/css">
.box {
position: -webkit-sticky;
position: sticky;
width: 100%;
height: 30px;
text-align: center;
color:
margin-bottom: 50px;
}
.box1 {
top: 0;
z-index: 1;
background:
}
.box2 {
top: 30px;
z-index: 1;
background:
}
.box3 {
background:
}
</style>
</head>
<body>
<div style="height:600px">滚动试试</div>
<div class="box box1">box1</div>
<div class="box box2">box2</div>
<div class="box box3">box3</div>
<div style="height:600px"></div>
</body>
</html>
