<!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 style="height: 100vh; overflow: auto">
<div style="height: 600vh">
<div style="height: 300px; background-color: bisque">zll</div>
<div style="height: 200vh; background-color: lightblue">//关键高度
<div style="height: 100vh; position: sticky; top: 0">asdasd</div>
</div>
</div>
</body>
</html>
这段代码可以看到的效果：感觉中间蓝色部分的div会吸顶（asdasd文字没有跟随滚动条移动），滑动一段距离中间模块才会跟随着滚动条一起滚动