标签：
1. inline-block+ text-align
eg:
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
.parent{text-align:center; background-color:red;}
.child{ display:inline-block; background-color:green;}
</style>
</head>
<body>
<div class="parent">
<div class="child"> DEMO</div>
</div>
</body>
2.table+margin
eg:
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
.parent{ background-color:red;}
.child{ display:table; margin:0 auto; background-color:green;}
</style>
</head>
<body>
<div class="parent">
<div class="child"> DEMO</div>
</div>
</body>
3.absolute+transform
eg:
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
.parent{ position:relative; }
.child{ position:absolute; left:50%; width:500px; transform:translatex(-50%); background-color:gray;}
</style>
</head>
<body>
<div class="parent">
<div class="child"> DEMO</div>
</div>
</body>
4.Flex+justify-content/margin
eg1:
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
.parent{ display:flex; justify-content:center;}
.child{ background-color:gray;}
</style>
</head>
<body>
<div class="parent">
<div class="child"> DEMO</div>
</div>
</body>
eg2:
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
.parent{display:flex; background-color:red;}
.child{ margin:0 auto; background-color:green; }
</style>
</head>
<body>
<div class="parent">
<div class="child"> DEMO</div>
</div>
</body>
标签：
原文地址：http://www.cnblogs.com/ycxqdkf/p/5865944.html
