<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>测试模板</title>
<style>
*{
margin: 0;
padding: 0px;
}
/* 第一种
.parent{
width: 400px;height: 200px;background: #797099;
position: relative;
}
.child{
width: 200px;height: 100px;background: #eee;
position: absolute;
top: 0px;
left: 0px;
right: 0px;
bottom: 0px;
margin:auto;
} */
/*
第二种
.parent{
width: 400px;height: 200px;background: #797099;
display:table-cell;
vertical-align:middle;
}
.child{
width: 200px;
height: 100px;
background: #eee;
border:2px solid #333;
margin: 0 auto;
}
*/
/* 第三种
.parent{
width: 400px;height: 200px;background: #797099;
display:table-cell;
vertical-align:middle;
text-align: center;
}
.child{
width: 200px;
height: 100px;
background: #eee;
border:2px solid #333;
display: inline-block;
} */
/*
第四种
.parent{
width: 400px;height: 200px;background: #797099;
display: flex;
}
.child{
width: 200px;
height: 100px;
background: #eee;
border:2px solid #333;
margin:auto
} */
/*
第五种
.parent{
width: 400px;height: 200px;background: #797099;
display: flex;
justify-content: center;
align-items: center;
}
.child{
width: 200px;
height: 100px;
background: #eee;
border:2px solid #333;
}
*/
.parent{
width:400px;height: 200px;background: #797099;
position: relative;
}
.child{
width: 300px;
height: 100px;
background: #eee;
border:2px solid #333;
position: absolute;
left: 50%;
top: 50%;
transform:translate(-50%,-50%);
}
</style>
</head>
<body>
<div class="parent" >
<div class="child"></div>
</div>
</body>
</html>
