CSS horizontal, vertical, center alignment
Use CSS properties to achieve various alignments, such as left alignment, center alignment, right alignment, vertical center alignment, etc.
##Method 1: Use float attributes to set left and right alignment
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>实例</title>
<title>php.cn</title>
<style type="text/css">
.divcss5-left{float:left;width:250px;height:50px;border:1px solid #F00}
</style>
</head>
<body>
<div class="divcss5-left">此DIV靠左对齐显示</div>
</body>
</html>Method 2: Use margin attribute for center alignment
Only required Addmargin:0 auto to the style to be centered.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>实例</title>
<title>php.cn</title>
<style type="text/css">
.divcss5-cent{margin:0 auto;width:250px;height:50px;border:1px solid #F00}
</style>
</head>
<body>
<div class="divcss5-cent">此DIV居中对齐显示</div>
</body>
</html>Method 3: Use the position attribute to set left and right alignment
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>实例</title>
<title>php.cn</title>
<style type="text/css">
.divcss5-cent
{
position:absolute;
right:0px;
width:250px;
height:50px;
border:1px solid #F00
}
</style>
</head>
<body>
<div class="divcss5-cent">此DIV右对齐显示</div>
</body>
</html>Use Multi-attribute vertical center alignment:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>实例</title>
<title>php.cn</title>
<style type="text/css">
.wrp {
background-color: #b9b9b9;
width: 340px;
height: 260px;
}
.box {
color: white;
background-color: #3e8e41;
width: 200px;
height: 120px;
overflow: auto;
}
.wrp1 { position: relative; }
.box1 {
margin: auto;
position: absolute;
left: 0; right: 0; top: 0; bottom: 0;
}
</style>
<body>
<div class="wrp wrp1">
<div class="box box1">
<h3>完全居中：</h3>
<h3>利用css定位规则，设置左右、上下方向定位为0，margin为auto</h3>
</div>
</div>
</body>
</html>
new file
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>实例</title>
<title>php.cn</title>
<style type="text/css">
.wrp {
background-color: #b9b9b9;
width: 340px;
height: 260px;
}
.box {
color: white;
background-color: #3e8e41;
width: 200px;
height: 120px;
overflow: auto;
}
.wrp1 { position: relative; }
.box1 {
margin: auto;
position: absolute;
left: 0; right: 0; top: 0; bottom: 0;
}
</style>
<body>
<div class="wrp wrp1">
<div class="box box1">
<h3>完全居中：</h3>
<h3>利用css定位规则，设置左右、上下方向定位为0，margin为auto</h3>
</div>
</div>
</body>
</html>
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