Correcting teacher:天蓬老师
Correction status:qualified
Teacher's comments:这个作业很袖珍呀, 我布置过这么简单的作业吗?下次记得写完再提交
实例代码:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>元素的水平与垂直对齐</title>
</head>
<style>
*{
margin: 0;
padding: 0;
box-sizing: border-box;
}
.box{
width: 300px;
height: 300px;
margin: 5px;
border: 1px solid #000;
position: relative;
float: left;
}
.item{
width: 100px;
height: 100px;
border: 1px solid #000;
position: absolute;
top: 0;
left: 0;
right: 0;
bottom: 0;
margin:auto;
}
.item_1{
text-align: center;
}
.box1{
width: 300px;
height: 300px;
margin: 5px;
border: 1px solid #000;
float: left;
}
.box1 .item1{
width: 100px;
height: 100px;
border: 1px solid #000;
text-align: center;
margin: 0 auto;
}
.box2{
width: 300px;
height: 300px;
margin: 5px;
border: 1px solid #000;
float: left;
position: relative;
}
.box2 .item2{
width: 100px;
height: 100px;
border: 1px solid #000;
text-align: center;
position: absolute;
top: 100PX;
}
</style>
<body>
<div class="box">
<div class="item"></div>
<div class="item_1">水平垂直居中</div>
</div>
<div class="box1">
<div class="item1"></div>
<div class="item1_1">水平居中</div>
</div>
<div class="box2">
<div class="item2"></div>
<div class="item2_1">垂直居中</div>
</div>
</body>
</html>