css-tips/clearfix.html at master · vanzheng/css-tips · GitHub

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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"><head>
    <meta http-equiv="content-type" content="text/html;charset=utf-8">
    <title>Clear fix Demo</title>
    <style type="text/css">
    .box {
        width: 600px;
        border: 1px solid black;
    }
    .floatbox {
        float: left;
        width: 280px;
        height: 280px;
        border: 1px solid red;
    }
    /* clearfix style */
    .clearfix:after {
        content:" ";
        display: block;
        height: 0;
        clear: both;
        visibility: hidden;
    }
    .clearfix {
        *zoom: 1;
        /* IE6, IE7 hack */
    }
    </style>
</head>
<body>
    <p>在加入clearfix样式之后，box的div被撑开了
    </p>
    <div class="box clearfix">
        <div class="floatbox">float box 1</div>
        <div class="floatbox">float box 2</div>
        <div class="floatbox">float box 3</div>
        <div class="floatbox">float box 4</div>
        <div class="floatbox">float box 5</div>
    </div>
</body>
</html>