iframe案例来练习与HTML样式基础

iframe网站后台

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>iframe: 后台案例练习</title>
    <style>
      * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
      }
      body {
        height: 100vh;
        width: 100vw;
        display: grid;
        grid-template-columns: 12em 1fr;
        grid-template-rows: 8em 1fr;
      }
      body header {
        display: flex;
        background-color: dodgerblue;
        /* 设置header容器的宽度，它跨越了2列 */
        grid-column-end: span 2;
        line-height: 8em;
        padding: 0 20px;
      }
      body header hgroup {
        display: flex;
        color: #fff;
      }
      body header hgroup h1 {
        font-size: 3em;
      }
      body header hgroup h2 {
        font-size: 1em;
        margin-left: 20px;
      }
      body header p {
        margin-left: auto;
        color: #fff;
      }
      body header p button {
        margin-left: 10px;
        padding: 4px;
        border: none;
      }
      body nav {
        background-color: #eee;
        border-right: 1px solid #333;
        padding: 10px;
      }
      body iframe {
        width: 100%;
        height: 100%;
        border: none;
      }
      body nav ul li {
        list-style-type: none;
      }
      body nav ul li a {
        display: block;
        padding: 0.5em 0;
        border-bottom: 1px solid #555;
        text-align: center;
        text-decoration: none;
      }
    </style>
  </head>
  <body>
    <!-- 顶部商标与状态 -->
    <header>
      <hgroup>
        <h1>LOGO</h1>
        <h2>网站后台管理系统 <small>(1.1v)</small></h2>
      </hgroup>
      <p><em>admin</em><button onclick="logout()">退出登录</button></p>
    </header>
    <!-- 左侧导航 -->
    <nav>
      <ul>
        <li><a href="#" target="content">item1</a></li>
        <li><a href="#" target="content">item2</a></li>
        <li><a href="#" target="content">item3</a></li>
        <li><a href="#" target="content">item4</a></li>
        <li><a href="#" target="content">item5</a></li>
        <li><a href="#" target="content">item6</a></li>
      </ul>
    </nav>
    <!-- iframe动态内容部分 -->
    <iframe src="inc/default.html" name="content"></iframe>
    <!-- JS代码 -->
    <script>
      function logout() {
        return confirm("是否退出?") ? alert("退出成功") : false;
      }
    </script>
  </body>
</html>