.clearfix:after 

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        .clearfix:after{
            content: "111";
            display: block;
            clear: both;
            visibility: hidden;
            height: 0;
        }
        .c{
            background-color: red;
        }
        .c .item{
            float: left;
        }
    </style>
</head>
<body>
    <div class="c clearfix">
        <div class="item">sg</div>
        <div class="item">dsg</div>
    </div>
</body>
</html>

 

posted @ 2017-03-06 20:12  失落的黎明  阅读(130)  评论(0)  编辑  收藏  举报