清除浮动

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>清楚浮动</title>
    <style type="text/css">
        .box{
            width: 100%;
        }
        .box >div{
            width: 30%;
            float: left;
        }
        .clearfix{
            clear: both;
            *zoom: 1;
        }
        .clearfix:after{
            display: block;
            clear: both;
            content: "";
            height: 0;
            visibility: hidden;
        }
    </style>
</head>
<body>
    <div class="box">
        <div>aaa</div>
        <div>bbb</div>
        <div>aaa</div>
        <div class=" clearfix"></div>
    </div>
</body>
</html>
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原文地址：https://www.cnblogs.com/jinsuo/p/7723101.html