基于浮动和定位的二列布局（复习）

作者：霏梦
基于浮动的二列布局

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>基于浮动的二列布局</title>
    <style>
      header,
      footer,
      aside,
      main {
        background-color: grey;
      }
      header,
      footer {
        height: 50px;
      }
      aside,
      main {
        min-height: 500px;
      }
      .wrap {
        width: 1000px;
        border: 1px solid red;
        overflow: hidden;
        margin: 10px auto;
      }
      aside {
        width: 200px;
        float: left;
        background-color: royalblue;
      }
      main {
        width: 790px;
        float: right;
        background-color: salmon;
      }
    </style>
  </head>
  <body>
    <header>页眉</header>
    <div class="wrap">
      <aside>侧边栏</aside>
      <main>主体内容区</main>
    </div>
    <footer>页脚</footer>
  </body>
</html>

float

定位

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>基于定位二列布局</title>
    <style>
      header,
      footer,
      aside,
      main {
        height: 50px;
      }
      header,
      footer {
        background-color: slategrey;
      }
      aside,
      main {
        min-height: 700px;
      }
      .wrap {
        width: 1000px;
        min-height: 700px;
        margin: 10px auto;
        /* 定位父级 */
        position: relative;
      }
      aside {
        width: 200px;
        background-color: springgreen;
        position: absolute;
        min-height: inherit;
      }
      main {
        width: 790px;
        background-color: lightcoral;
        position: absolute;
        min-height: inherit;
        right: 0;
      }
    </style>
  </head>
  <body>
    <header>页眉</header>
    <div class="wrap">
      <aside>左侧栏</aside>
      <main>主体内容区</main>
    </div>
    <footer>页脚</footer>
  </body>
</html>

基于浮动的二列布局

定位

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