<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<style type="text/css">
// 知不知道box-center宽高都可以
// 第一种
.box {
width: 200px;
height: 200px;
position: relative;
background-color: red;
}
.box-center {
position: absolute;
left: 50%;
top: 50%;
width: 100px;
height: 100px;
transform: translate(-50%, -50%);
background-color: blue;
}
// 第二种
.box {
height: 200px;
width: 200px;
text-align: center;
background-color: red;
}
.box::after,
.box-center {
display: inline-block;
vertical-align: middle;
}
.box-center {
background-color: blue;
height: 100px;
width: 100px;
}
.box::after {
content: '';
height: 100%;
}
//第三种
.box {
height: 200px;
width: 200px;
display: flex;
align-items: center;
justify-content: center;
background-color: red;
}
.box-center {
width: 100px;
height: 100px;
background-color: yellow;
}
// 必须知道box-center宽高
// 第一种
.box {
width: 200px;
height: 200px;
position: relative;
background-color: red;
}
.box-center {
width: 100px;
height: 100px;
position: absolute;
left: 50%;
top: 50%;
margin-top: -50px;
margin-left: -50px;
background-color: blue;
}
// 第二种
.box {
width: 200px;
height: 200px;
position: relative;
background-color: red;
}
.box-center {
width: 100px;
height: 100px;
position: absolute;
left: 0;
right: 0;
top: 0;
bottom: 0;
margin: auto;
background-color: blue;
}
</style>
</head>
<body>
<div class="box">
<div class="box-center">1111111111</div>
</div>
</body>
</html>
关于HTML页面内容水平垂直居中的6种方法
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转载自blog.csdn.net/qq_44997147/article/details/104350335
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