css中的五种常见页面布局

公共样式部分代码：

（引荐教程：CSS教程）

    html * {
      margin: 0;
      padding: 0;
    }
    .layout {
      margin-bottom: 20px;
    }
    .layout article {
      width: 100%;
     }
    .layout article > div {
      min-height: 100px;
    }
    .layout article .left {
      width: 300px;
      background: red;
    }
    .layout article .center {
      background: orange;
    }
    .layout article .right {
      width: 300px;
      background: blue;
    }

float规划

  <!-- 浮动规划 -->
  <section class="layout float">
    <style>
      .layout.float .left {
        float: left;
      }
      .layout.float .right {
        float: right;
      }
    </style>
    <article class="left-center-right">
      <div class="left"></div>
      <div class="right"></div>
      <div class="center">
        <h2>这是float规划</h2>
        <p>这是一段文字</p>
        <p>这是一段文字</p>
      </div>
    </article>
  </section>

absolute规划

 <!-- 定位规划 -->
  <section class="layout absolute">
    <style>
      .layout.absolute .left-center-right > div {
        position: absolute;
      }
      .layout.absolute .left {
        left: 0;
      }
      .layout.absolute .center {
        left: 300px;
        right: 300px;
      }
      .layout.absolute .right {
        right: 0;
      }
    </style>
    <article class="left-center-right">
      <div class="left"></div>
      <div class="center">
        <h2>这是absolute规划</h2>
        <p>这是一段文字</p>
        <p>这是一段文字</p>
      </div>
      <div class="right"></div>
    </article>
  </section>

flex规划

  <!-- flex规划 -->
  <section class="layout flex">
    <style>
      .layout.flex {
        margin-top: 140px;
      }
      .layout.flex .left-center-right{
        display: flex;
      }
      .layout.flex .center {
        flex: 1;
      }
    </style>
    <article class="left-center-right">
      <div class="left"></div>
      <div class="center">
        <h2>这是flex规划</h2>
        <p>这是一段文字</p>
        <p>这是一段文字</p>
      </div>
      <div class="right"></div>
    </article>
  </section>

table规划

  <!-- table规划 -->
  <section class="layout table">
    <style>
      .layout.table .left-center-right {
        display: table;
        height: 100px;
      }
      .layout.table .left-center-right > div{
        display: table-cell;
      }
    </style>
    <article class="left-center-right">
      <div class="left"></div>
      <div class="center">
        <h2>这是table规划</h2>
        <p>这是一段文字</p>
        <p>这是一段文字</p>
      </div>
      <div class="right"></div>
    </article>
  </section>

grid规划

  <!-- grid规划 -->
  <section class="layout grid">
    <style>
      .layout.grid .left-center-right {
        display: grid;
        grid-template-columns: 300px auto 300px;
      }
    </style>
    <article class="left-center-right">
      <div class="left"></div>
      <div class="center">
        <h2>这是grid规划</h2>
        <p>这是一段文字</p>
        <p>这是一段文字</p>
      </div>
      <div class="right"></div>
    </article>
  </section>

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