html {
margin: 30px;
border: 1px solid red;
}
body {
margin: 30px;
border: 1px solid orange;
overflow: scroll;
}<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width,initial-scale=1.0,user-scalable=no">
<title>Title</title>
<link rel="stylesheet" href="font/style.css">
<style type="text/css">
* {
margin: 0;
padding: 0;
}
html {
margin: 30px;
border: 1px solid red;
overflow: hidden;
}
body {
margin: 30px;
border: 1px solid orange;
overflow: scroll;
}
</style>
</head>
<body style="height: 1000px;">
</body>
</html>注：fixed与absolute定位的区别体现于有滚动条出现的时候
当拖动系统滚动条时，初始包含块会被拖动，而拖动任意其他元素滚动条时，初始包含块不会被拖动；因此禁用系统滚动条，则fixed定位可与absolute定位相同
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width,initial-scale=1.0,user-scalable=no">
<title>Title</title>
<link rel="stylesheet" href="font/style.css">
<style type="text/css">
* {
margin: 0;
padding: 0;
}
html {
overflow: hidden;
height: 110%;
}
body {
overflow: scroll;
height: 100%;
}
#test {
width: 100px;
height: 200px;
position: absolute;
left: 50px;
top: 50px;
background-color: dodgerblue;
}
</style>
</head>
<body>
<div id="test"></div>
</body>
</html>原文：https://www.cnblogs.com/kanaliya/p/12287910.html