<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
/* 父级添加after伪元素 方法 清除浮动 */
/* .clearfix::after{
content: "";
display: block;
height: 0;
clear: both;
visibility: hidden;
} */
/* IE6、7 */
/* .clearfix{
*zoom:1;
} */
/* 父级添加双伪元素 方法清除浮动 */
.clearfix:before,.clearfix:after{
content: "";
display: table;
}
.clearfix:after{
clear:both;
}
.clearfix{
*zoom:1;
}
.box{
/* overflow 方法清除浮动 */
/* overflow: hidden; */
800px;
border: 1px solid red;
margin: 0 auto;
}
.one{
float: left;
150px;
height: 200px;
background-color: plum;
}
.two{
float: left;
300px;
height: 300PX;
background-color: khaki;
}
.footer{
height: 200px;
background-color: rosybrown;
}
/* 额外标签法 */
/* .clear{
clear: both;
} */
</style>
</head>
<body>
<!--
1 额外标签法
2 父级添加overflow
3 父级添加after伪元素
4 父级添加双伪元素
-->
<div class="box clearfix">
<div class="one">one</div>
<div class="two">two</div>
<!-- 额外标签法 注意 这个新增的盒子必须是块级元素 -->
<!-- <div class="clear"></div> -->
</div>
<div class="footer"></div>
</body>
</html>