捕获.PNG
设置子元素div 和 父级div 宽高一样
使得子元素div在父级的div里面居中
<!DOCTYPE html>
<html lang="en">
<head>
<style>
.wraper{
width: 200px;
height: 200px;
background-color: red;
padding: 50px;
}
.content{
width: 80px;
height: 80px;
background-color: yellow;
}
/*内外层宽高相同*/
/*子元素div会在父级的div里面居中*/
.wrapersss{
width: 100px;
height: 100px;
background-color: red;
/*膨胀，将内容撑开*/
padding: 50px;
}
.contentsss{
width: 100px;
height: 100px;
background-color: yellow;
}
</style>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<div class="wraper">
<div class="content">1</div>
</div>
<br>
<div class="wrapersss">
<div class="contentsss">2</div>
</div>
</body>
</html>
