html垂直居中
参考于http://www.cnblogs.com/yugege/p/5246652.html
<!DOCTYPE html>
<html >
<head>
<meta charset="UTF-8">
<title>index</title>
<style>
html,body {
width: 100%;
height: 100%;
margin: 0;
padding: 0;
}
.content {
width: 300px;
height: 300px;
background: orange;
margin: 0 auto; /*水平居中*/
position: relative; /*脱离文档流*/
top: 50%; /*偏移*/
margin-top: -150px;
}
</style>
</head>
<body>
<div class="content"></div>
</body>
</html><!DOCTYPE html>
<html >
<head>
<meta charset="UTF-8">
<title>index</title>
<style>
html,body {
width: 100%;
height: 100%;
margin: 0;
padding: 0;
}
.content {
width: 300px;
height: 300px;
background: orange;
margin: 0 auto; /*水平居中*/
position: relative; /*脱离文档流*/
top: 50%; /*偏移*/
transform: translateY(-50%);
}
</style>
</head>
<body>
<div class="content"></div>
</body>
</html><!DOCTYPE html>
<html >
<head>
<meta charset="UTF-8">
<title>index</title>
<style>
html,body {
width: 100%;
height: 100%;
margin: 0;
padding: 0;
}
body {
display: flex;
align-items: center; /*定义body的元素垂直居中*/
justify-content: center; /*定义body的里的元素水平居中*/
}
.content {
width: 300px;
height: 300px;
background: orange;
}
</style>
</head>
<body>
<div class="content"></div>
</body>
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