实现垂直方向margin：auto居中
writing-mode:vertical-lr;改变垂直方向
.png)
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title></title>
<style type="text/css">
#father{
width: 100%;
height: 500px;
background: lightcoral;
writing-mode:vertical-lr;
}
#son{
background: lightblue;
height: 200px;
margin:auto;
width: 200px;
}
</style>
</head>
<body>
<div id="father">
<div id="son">
</div>
</div>
</body>
</html>
使用absolute，auto居中定位
设置其父类元素为relative属性，子元素为absolute属性
.png)
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title></title>
<style type="text/css">
#father{
height: 500px;
background: lightcoral;
position: relative;
}
#son{
background: lightblue;
position: absolute;
top: 0;
bottom: 0;
left: 0;
right: 0;
width: 200px;
height: 100px;
margin: auto;
}
</style>
</head>
<body>
<div id="father">
<div id="son">
</div>
</div>
</body>
</html>
时间： 2024-10-14 00:08:15