方法一:margin + width
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<!Doctype html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GBK"/>
<title>css布局水平居中margin + width</title>
<style type="text/css">
*{margin:0;padding:0;}
.box{
width:100px;
margin:0 auto;
background:red;
}
</style>
</head>
<body>
<div class="box">Demo</div>
</body>
</html>
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这个水平居中方法,我们最熟悉了,也是最常用的,width可以固定px也可以使用百分比
方法二:table + margin
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<!Doctype html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GBK"/>
<title>css布局水平居中table + margin</title>
<style type="text/css">
*{margin:0;padding:0;}
.box{
display: table;
margin: 0 auto;
background:red;
}
</style>
</head>
<body>
<div class="box">Demo</div>
</body>
</html>
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说明:display: table在表现上类似block元素,但是宽度为内容宽。无需设置父元素样式 (支持 IE 8 及其以上版本)兼容 IE 8 一下版本需要调整为<table>
方法三:inline-block + text-align
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<!Doctype html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GBK"/>
<title>css布局水平居中inline-block + text-align</title>
<style type="text/css">
*{margin:0;padding:0;}
.content{
text-align:center;
}
.box{
display:inline-block;
background: red;
}
</style>
</head>
<body>
<div class="content">
<div class="box">Demo</div>
</div>
</body>
</html>
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说明:兼容性佳(甚至可以兼容 IE 6 和 IE 7)
方法四:absolute + margin-left
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<!Doctype html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GBK"/>
<title>css布局水平居中absolute + margin-left</title>
<style type="text/css">
*{margin:0;padding:0;}
.content{
position: relative;
}
.box{
position: absolute;
left: 50%;
width: 100px;
margin-left: -50px;
background: red;
}
</style>
</head>
<body>
<div class="content">
<div class="box">Demo</div>
</div>
</body>
</html>
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说明:宽度固定相比于使用transform ,有兼容性更好
方法五:absolute + transform
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<!Doctype html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GBK"/>
<title>css布局水平居中absolute + transform</title>
<style type="text/css">
*{margin:0;padding:0;}
.content{
position: relative;
}
.box{
position: absolute;
left: 50%;
transform: translateX(-50%);
background: red;
}
</style>
</head>
<body>
<div class="content">
<div class="box">Demo</div>
</div>
</body>
</html>
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说明:绝对定位脱离文档流,不会对后续元素的布局造成影响。transform为 CSS3 属性,有兼容性问题
方法六:flex + justify-content
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<!Doctype html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GBK"/>
<title>css布局水平居中flex + justify-content</title>
<style type="text/css">
*{margin:0;padding:0;}
.content{
display: flex;
justify-content: center;
}
.box{
width: 100px;
background: red;
}
</style>
</head>
<body>
<div class="content">
<div class="box">Demo</div>
</div>
</body>
</html>
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说明:只需设置父节点属性,无需设置子元素flex有兼容性问题