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模态框练习
天宁
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模态框

html代码

  1. <!DOCTYPE html>
  2. <html lang="en">
  3.     <head>
  4.         <meta charset="UTF-8" />
  5.         <meta http-equiv="X-UA-Compatible" content="IE=edge" />
  6.         <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  7.         <title>模态框</title>
  8.         <link rel="stylesheet" href="modal.css" />
  9.     </head>
  10.     <body>
  11.         <!-- 头部 -->
  12.         <header>
  13.             <h2 class="title">我的博客</h2>
  14.             <button onclick="showModal()">登录</button>
  15.         </header>
  16.         <!-- 模态框 -->
  17.         <div class="modal">
  18.             <!-- 1.半透明的遮罩 -->
  19.             <div class="modal-zz" onclick="closeModal()"></div>
  20.             <!-- 2.弹层表单 -->
  21.             <form action="" class="modal-form">
  22.                 <fieldset style="display: grid; gap: 1em">
  23.                     <legend>用户登录</legend>
  24.                     <input type="text" name="username" placeholder="请输入账号" required />
  25.                     <input type="password" name="password" placeholder="密码不少于6位" required />
  26.                     <button>登录</button>
  27.                 </fieldset>
  28.             </form>
  29.         </div>
  30.         <script src="modal.js"></script>
  31.     </body>
  32. </html>

css代码

  1. * {
  2.     margin: 0px;
  3.     padding: 0px;
  4.     box-sizing: border-box;
  5. }
  7. /* 头部标题 */
  9. header {
  10.     background-color: #666699;
  11.     padding: 0.5em 1em;
  12.     display: flex;
  13. }
  15. /* logo */
  16. header .title {
  17.     font-weight: bold;
  18.     font-style: italic;
  19.     color: white;
  20.     letter-spacing: 10px;
  21.     text-shadow: 1px 1px 1px #555;
  22. }
  24. /* 登录按钮 */
  25. header button {
  26.     margin-left: auto;
  27.     width: 5em;
  28.     border: none;
  29.     border-radius: 5px;
  30. }
  32. header button:hover {
  33.     cursor: pointer;
  34.     background-color: blue;
  35.     color: #fff;
  36.     box-shadow: 0 0 5px #fff;
  37.     transition: 0.3s;
  38. }
  40. header button:active {
  41.     cursor: pointer;
  42.     background-color: red;
  43.     color: #fff;
  44. }
  46. /* 模态框 */
  47. .modal .modal-form fieldset {
  48.     height: 15.5em;
  49.     background-color: lightcyan;
  50.     border: none;
  51.     padding: 2em 3em;
  52.     box-shadow: 0 0 5px #888;
  53.     width: 400px;
  54. }
  56. /* 模态框表单标题 */
  57. .modal .modal-form fieldset legend {
  58.     padding: 7px 1.5em;
  59.     background-color: #009966;
  60.     color: white;
  61.     border-radius: 5px;
  62. }
  64. .modal .modal-form fieldset input {
  65.     height: 3em;
  66.     margin: 1px;
  67.     padding-left: 1em;
  68.     outline: none;
  69.     border: 1px solid #ddd;
  70.     font-size: 14px;
  71.     border-radius: 2px;
  72. }
  74. .modal .modal-form fieldset input:focus {
  75.     box-shadow: 1px 1px 5px #888;
  76.     border: none;
  77.     /* border: 1px solid blue; */
  78. }
  80. .modal .modal-form fieldset button {
  81.     background-color: #009966;
  82.     color: white;
  83.     border: none;
  84.     height: 3em;
  85.     font-size: 16px;
  86.     height: 2.5em;
  87.     border-radius: 5px;
  88. }
  90. .modal .modal-form fieldset button:hover {
  91.     background-color: coral;
  92.     transition: 0.3s;
  93.     cursor: pointer;
  94.     box-shadow: 0 0 5px #888;
  95. }
  97. /* 定位 */
  98. .modal .modal-form {
  99.     position: fixed;
  100.     left: calc((100% - 400px) / 2);
  101.     top: calc((100% - 15.5em) / 2);
  102. }
  104. /* 遮罩 */
  105. .modal .modal-zz {
  106.     position: fixed;
  107.     top: 0;
  108.     right: 0;
  109.     bottom: 0;
  110.     left: 0;
  111.     background-color: rgba(0, 0, 0, 0.5);
  112. }
  114. .modal {
  115.     display: none;
  116. }

js代码

  1. function showModal() {
  2.     // 获取模态框元素
  3.     const modal = document.querySelector('.modal');
  5.     // 显示模态框
  6.     modal.style.display = 'block';
  8.     // 焦点自动置入第一个输入框email
  9.     modal.querySelector('input:first-of-type').focus();
  10. }
  12. function closeModal() {
  13.     // 获取模态框元素
  14.     const modal = document.querySelector('.modal');
  16.     // 关闭模态框
  17.     modal.style.display = 'none';
  18. }
Correcting teacher：PHPzPHPz

Correction status：qualified

Teacher's comments：
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