CSS实现文本一行垂直居中，两行垂直居中，超出两行文字显示省略号的方法
实现单行垂直居中，两行垂直居中，超过两行省略…显示
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
span{
display:-webkit-box;
-webkit-line-clamp:2;
-webkit-box-orient:vertical;
overflow:hidden;
text-overflow:ellipsis;
}
div{
font-size: 18px;
height: 46px;
line-height: 23px;
display: flex;
align-items: center;
justify-content: center;
}
</style>
</head>
<body>
<div>
<span>单行居中，两行居中</span>
</div>
</body>
</html>
