<!DOCTYPE html>
<html lang="en-US">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
div {
margin: 20px;
width: 200px;
height: 300px;
background-color: peru;
border: 10px dotted magenta;
/* border-bottom-width: 50px; */
padding: 20px;
}
section {
background-color: plum;
width: 100px;
height: 200px;
/* overflow: scroll; */
/* overflow-y: hidden; */
overflow: auto;
border: 10px dashed teal;
/* border-top-width: 50px; */
padding: 20px;
}
body {
background-color: aqua;
height: 1500px;
width: 1500px;
}
html {
background-color: tan;
border: 10px dashed maroon;
padding: 20px;
}
</style>
</head>
<body>
<section>
<div></div>
</section>
<script>
const section = document.querySelector('section')
const div = document.querySelector('div')
</script>
</body>
</html>
View Codedocument.documentElement水平和垂直表现不一样
scrollWidth = 10 + 20 + 8 + 1500
scrollHeight = offsetHeight = (10 + 20) * 2 + 8 * 2 + 1500 = 1576
<!DOCTYPE html>
<html lang="en-US">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
* {
margin: 0;
padding: 0;
}
html,
body {
height: 100%;
}
div {
width: 300px;
height: 500px;
margin: 30px;
border: 20px dashed violet;
padding: 40px;
background-color: plum;
position: relative;
overflow-x: scroll;
overflow-y: scroll;
display: flow-root;
}
aside {
width: 100px;
height: 800px;
background-color: peru;
position: absolute;
margin: 10px;
padding: 20px;
border: 30px dotted coral;
top: 50px;
}
</style>
</head>
<body>
<div>
<aside></aside>
</div>
<script>
const div = document.querySelector('div')
const aside = document.querySelector('aside')
</script>
</body>
</html>
<!DOCTYPE html>
<html lang="en-US">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
div {
margin: 20px;
width: 200px;
height: 300px;
background-color: peru;
border: 10px dotted magenta;
/* border-bottom-width: 50px; */
padding: 20px;
}
section {
background-color: plum;
width: 100px;
height: 200px;
/* overflow: scroll; */
/* overflow-y: hidden; */
overflow: auto;
border: 10px dashed teal;
/* border-top-width: 50px; */
padding: 20px;
}
body {
background-color: aqua;
height: 500px;
width: 500px;
border: 10px dotted crimson;
padding: 20px;
}
html {
background-color: tan;
border: 10px dashed maroon;
padding: 20px;
width: 400px;
height: 400px;
}
</style>
</head>
<body>
<section>
<div></div>
</section>
<script>
const section = document.querySelector('section')
const div = document.querySelector('div')
</script>
</body>
</html>
