标签：导航 set pre 实现 lang image doc class src
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>test</title>
<style>
body{
margin: 0px;
padding: 0;
}
.app{
height: 400px;
width: 400px;
background-color: gray;
padding-top: 40px;
}
.app01{
width: 400px;
height: 40px;
background-color: green;
position: fixed;
left: 0;
top: 0;
}
</style>
</head>
<body>
<div class="app">
<div class="app01">
头部导航
</div>
<div class="content">
content
</div>
</div>
</body>
</html>
标签：导航 set pre 实现 lang image doc class src
原文地址：https://www.cnblogs.com/iiiiiher/p/9974820.html
