css3实现不定宽高div水准垂直居中
css3实现不定宽高div水平垂直居中
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>不定宽高进行垂直水平居中</title>
<style type="text/css">
#demo{
position: absolute;
left: 50%;
top:50%;
width: 500px;
transform:translate(-50%,-50%);
-webkit-transform:translate(-50%,-50%);
background: #123455;
color: #fff;
}
</style>
</head>
<body>
<div id="demo">
<p>水平垂直居中的随意内容</p>
</div>
</body>
</html>
效果: