<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style type="text/css">
*{
margin: 0 ;
padding: 0;
}
span{
border: 1px solid #333;
}
div{
display: flex;
justify-content:center;/*x轴对齐方式*/
align-items:center; /*y轴对滴方式*/
height: 100vh;
}
</style>
</head>
<body>
<div><span>内容所在区域</span></div>
</body>
</html>
flex元素元素垂直和书评居中
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转载自blog.csdn.net/jiaowo_ccc/article/details/81185643
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