CSS實現三欄佈局，左右寬度固定，中間寬度自適應

假設高度一定，請寫出三欄佈局，左右寬度300px，中間自適應。
首先要寫好整個頁面的佈局：

    <style>
        html * {
            padding: 0;
            margin: 0;
        }

        .layout {
            margin-top: 20px;
        }

        .layout article div {
            min-height: 100px;
        }
    </style>

1.浮動的解決方案

<!-- 浮動佈局解決方案 -->
    <section class="layout float">
        <style>
            .layout.float .left {
                float: left;
                width: 300px;
                background: red;
            }

            .layout.float .right {
                float: right;
                width: 300px;
                background: blue;
            }

            .layout.float .center {
                background: yellow;
            }
        </style>
        <article class="left-center-right">
            <div class="left"></div>
            <div class="right"></div>
            <div class="center">
                <h1>浮動解決方案</h1>
                <p>1.這是佈局的中間部分</p>
                <p>2.這是佈局的中間部分</p>
            </div>
        </article>
    </section>

2.絕對定位的解決方案

<!-- 絕對定位的解決方案 -->
    <section class="layout absolute">
        <style>
            .layout.absolute .left-center-right>div {
                position: absolute;
            }

            .layout.absolute .left {
                left: 0;
                width: 300px;
                background: red;
            }

            .layout.absolute .center {
                left: 300px;
                right: 300px;
                background: yellow;
            }

            .layout.absolute .right {
                right: 0;
                width: 300px;
                background: blue;
            }
        </style>
        <article class="left-center-right">
            <div class="left"></div>
            <div class="center">
                <h1>絕對定位的解決方案</h1>
                <p>1.這是佈局的中間部分</p>
                <p>2.這是佈局的中間部分</p>
            </div>
            <div class="right"></div>
        </article>
    </section>

3.flexbox的解決方案

<!-- flexbox解決方案 -->
    <section class="layout flexbox">
        <style>
            .layout.flexbox {
                margin-top: 140px;
            }

            .layout.flexbox .left-center-right {
                display: flex;
            }

            .layout.flexbox .left {
                width: 300px;
                background: red;
            }

            .layout.flexbox .center {
                flex: 1;
                background: yellow;
            }

            .layout.flexbox .right {
                width: 300px;
                background: blue;
            }
        </style>
        <article class="left-center-right">
            <div class="left"></div>
            <div class="center">
                <h1>flexbox的解決方案</h1>
                <p>1.這是佈局的中間部分</p>
                <p>2.這是佈局的中間部分</p>
            </div>
            <div class="right"></div>
        </article>
    </section>

4.表格佈局的解決方案

<!-- 表格佈局的解決方案 -->
    <section class="layout table">
        <style>
            .layout.table .left-center-right {
                width: 100%;
                display: table;
                height: 100px;
            }

            .layout.table .left-center-right>div {
                display: table-cell;
            }

            .layout.table .left {
                width: 300px;
                background: red;
            }

            .layout.table .center {
                background: yellow;
            }

            .layout.table .right {
                width: 300px;
                background: blue;
            }
        </style>
        <article class="left-center-right">
            <div class="left"></div>
            <div class="center">
                <h1>表格佈局的解決方案</h1>
                <p>1.這是佈局的中間部分</p>
                <p>2.這是佈局的中間部分</p>
            </div>
            <div class="right"></div>
        </article>
    </section>

5.網格佈局的解決方案

<!-- 網格佈局的解決方案     -->
    <section class="layout grid">
        <style>
            .layout.grid .left-center-right {
                display: grid;
                width: 100%;
                grid-template-rows: 100px;
                grid-template-columns: 300px auto 300px;
            }

            .layout.grid .left {
                background: red;
            }

            .layout.grid .center {
                background: yellow;
            }

            .layout.grid .right {
                background: blue;
            }
        </style>
        <article class="left-center-right">
            <div class="left"></div>
            <div class="center">
                <h1>網格佈局的解決方案</h1>
                <p>1.這是佈局的中間部分</p>
                <p>2.這是佈局的中間部分</p>
            </div>
            <div class="right"></div>
        </article>
    </section>

效果圖：

轉載自：https://blog.csdn.net/a_small_insect/article/details/79410163