浮动

清除浮动的最好办法

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
    <style>
        .box{
            border:1px solid red;
        }
        .box:after{                    /*通过给父级加上after伪类，清楚浮动*/
            content: '';
            display: block;
            clear: both;
        }
        .item{
            width: 200px;
            height: 200px;
            background: black;
            float: left;
        }
    </style>
</head>
<body>
    <div class="box">
        <div class="item"></div>
    </div>
</body>
</html>

 

posted @ 2017-05-03 10:31  影子疯  阅读(101)  评论(0)    收藏  举报