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西兰花伟大炮
TA贡献376条经验 获得超318个赞
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style>
.container{
height: auto;
width: 400px;
margin: 100px auto;
border: 2px dotted red;
}
.item{
float: left;
width: 50px;
height: 50px;
background: yellow;
margin-right: 10px;
}
/*.clearfix::after{
content: "";
height: 0;
clear: both;
display: block;
}*/
.last{
clear: both;
}
</style>
</head>
<body>
<div class="container clearfix" >
<div class="item"></div>
<div class="item"></div>
<div class="item"></div>
<div class="item"></div>
<div class="last"></div>
</div>
</body>
</html>两种方法，一种伪类，一种是在末尾添加空元素，欢迎采纳
frece
TA贡献36条经验 获得超15个赞
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
.fl{float: left;}
.fr{float: right;}
.square{width: 200px; height: 200px; border: 1px solid #0000ff;}
.clear{clear: both;}
</style>
</head>
<body>
<div>
<div class="square fl">square1</div>
<div class="square fr">square2</div>
<div class="clear"></div>
</div>
<label>test text</label>
</body>
</html>大型项目里都会定义一个 .clear 的样式 需要的时候直接用，上边代码你可以把<div class="clear"></div>去掉看看区别
一般情况下， 有浮动必有clear
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