css粘性定位position：sticky问题采坑
position: sticky 详解（防坑指南）
CSS中position属性（sticky）
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<div>
<div class="a"></div>
<div class="b">我是你爸爸</div>
<div class="c"></div>
<div class="d"></div>
</div>
</body>
<style>
.a{
height: 200px;
background-color: greenyellow;
}
.b{
height: 20px;
background-color: red;
position: sticky;
position: -webkit-sticky;
top: 0;
}
.c{
height: 2100px;
background-color: blue;
}
.d{
height: 600px;
background-color: yellow;
}
</style>
</html>
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