1. div Chinese text is centered horizontally and vertically
1. Know the width and height of the parent element
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>水平垂直居中</title>
<style>
body {
width: 500px;
height: 500px;
}
.f1 {
width: 100px;
height: 100px;
background: pink;
text-align: center;
line-height: 100px;
}
</style>
</head>
<body>
<div class="f1">
我是文字
</div>
</body>
</html>
2. The width and height of the unknown parent element
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>水平垂直居中</title>
<style>
body {
width: 500px;
height: 500px;
}
.f1 {
display: flex; /*flex 布局*/
width: 50%;
height: 50%;
background: pink;
align-items: center; /*实现垂直居中*/
justify-content: center; /*实现水平居中*/
}
</style>
</head>
<body>
<div class="f1">
我是文字
</div>
</body>
</html>
Two, css child element div (known width and height, unknown width and height) vertically center the parent element div
https://blog.csdn.net/qq_40015157/article/details/113845120