竖直布局解决方案

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本文是水平布局解决方案的姊妹篇

题目

题目: 假设宽度已知, 请写出三栏布局, 其中上、下栏高度各为 100 px, 中间自适应。

position 布局

<body>
    <style>
        html, body, .box {
            height: 100%;
        }
        .box {
            position: relative;
        }
        .head {
            position: absolute;
            width: 100%;
            top: 0;
            height: 100px;
            background: red;
        }
        .middle {
            position: absolute;
            width: 100%;
            top: 100px;
            bottom: 100px;
            background: yellow;
        }
        .bottom {
            position: absolute;
            width: 100%;
            bottom: 0;
            height: 100px;
            background: red
        }
    </style>
    <div class="box">
        <section class="head"></section>
        <section class="middle"></section>
        <section class="bottom"></section>
    </div>
</body>

flex 布局

<body>
    <style>
        html, body, .box {
            height: 100%;
        }
        .box {
            display: flex;
            flex-direction: column;
            height: 100%;
        }
        .head {
            height: 100px;
            background: red;
        }
        .middle {
            flex: 1;
            background: yellow;
        }
        .bottom {
            height: 100px;
            background: red
        }
    </style>
    <div class="box">
        <section class="head"></section>
        <section class="middle"></section>
        <section class="bottom"></section>
    </div>
</body>

grid 布局

<body>
    <style>
        html, body, .box {
            height: 100%;
        }
        .box {
            display: grid;
            grid-template-columns: 100%;
            grid-template-rows: 100px auto 100px;
        }
        .head {
            height: 100px;
            background: red;
        }
        .middle {
            bottom: 100px;
            background: yellow;
        }
        .bottom {
            height: 100px;
            background: red
        }
    </style>
    <div class="box">
        <section class="head"></section>
        <section class="middle"></section>
        <section class="bottom"></section>
    </div>
</body>

table 布局

<body>
    <style>
        html, body, .box {
            height: 100%;
            width: 100%;
        }
        .box {
            display: table;
        }
        .head {
            display: table-row;
            width: 100%;
            height: 100px;
            background: red;
        }
        .middle {
            display: table-row;
            width: 100%;
            background: yellow;
        }
        .bottom {
            display: table-row;
            width: 100%;
            height: 100px;
            background: red
        }
    </style>
    <div class="box">
        <section class="head">123</section>
        <section class="middle">456</section>
        <section class="bottom">789</section>
    </div>
</body>