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CSS实现div填满剩余高度

方式一：绝对定位

<!doctype html>
<html>
<head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
    <title></title>
    <style type="text/css">
        * {
            margin: 0;
            padding: 0;
        }
        html, body {
            height: 100%;
        }
        # aaa {
            height:200px;
            background-color: red;
        }
        # bbb {
            width: 100%;
            background-color: #0a58ca; 
            position: absolute;
            top: 200px;
            bottom: 0px;
            left: 0px;
        }

    </style>
</head>
<body>
    <div id="aaa">11</div>
    <div id="bbb">222</div>
</body>
</html>

方式二

<!doctype html>
<html>
<head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
    <title></title>
    <style type="text/css">
        * {
            margin: 0;
            padding: 0;
        }
        html, body {
            height: 100%;
        }
        # aaa {
            height:200px;
            background-color: red;
            margin: -200px 0 0;
            width: 100%;
        }
        # bbb {
            background-color: #0a58ca; 
            height: 100%;
        }

    </style>
</head>
<body>
    <div id="aaa">11</div>
    <div id="bbb">222</div>
</body>
</html>

方式三

<!doctype html>
<html>
<head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
    <title></title>
    <style type="text/css">
        * {
            margin: 0;
            padding: 0;
        }
        html, body {
            height: 100%;
        }
        # aaa {
            height:200px;
            background-color: red;
            position: absolute;
            left: 0;
            top: 0;
            width: 100%;
        }
        # bbb {
            background-color: #0a58ca; 
            height: 100%;
        }

    </style>
</head>
<body>
    <div id="aaa">11</div>
    <div id="bbb">222</div>
</body>
</html>

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原文地址：https://www.cnblogs.com/wuwuyong/p/14836244.html