AJAX——综合案例

1 Bootstrap弹框

功能：不离开当前页面，显示单独内容，供用户操作

步骤：

1. 引入bootstrap.css和bootstrap.js
2. 准备弹框标签，确认结构
3. 通过自定义属性，控制弹框的显示和隐藏

<!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>Bootstrap 弹框</title>
  <!-- 引入bootstrap.css -->
  <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.2.2/dist/css/bootstrap.min.css" rel="stylesheet">
</head>

<body>
  <!-- 
    目标：使用Bootstrap弹框
    1. 引入bootstrap.css 和 bootstrap.js
    2. 准备弹框标签，确认结构
    3. 通过自定义属性，控制弹框的显示和隐藏
   -->
  <button type="button" class="btn btn-primary" data-bs-toggle="modal" data-bs-target=".my-box">
    显示弹框
  </button>

  <!-- 
    弹框标签
    bootstrap的modal弹框，添加modal类名（默认隐藏）
   -->
  <div class="modal my-box" tabindex="-1">
    <div class="modal-dialog">
      <!-- 弹框-内容 -->
      <div class="modal-content">
        <!-- 弹框-头部 -->
        <div class="modal-header">
          <h5 class="modal-title">Modal title</h5>
          <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
        </div>
        <!-- 弹框-身体 -->
        <div class="modal-body">
          <p>Modal body text goes here.</p>
        </div>
        <!-- 弹框-底部 -->
        <div class="modal-footer">
          <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Close</button>
          <button type="button" class="btn btn-primary">Save changes</button>
        </div>
      </div>
    </div>
  </div>

  <!-- 引入bootstrap.js -->
  <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.2.2/dist/js/bootstrap.min.js"></script>
</body>

</html>

2 Bootstrap弹框使用-js控制显示和隐藏

1.通过属性控制，弹框显示或隐藏 单纯显示/隐藏

2.通过JS控制，弹框显示或隐藏 额外逻辑代码

<!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>Bootstrap 弹框</title>
  <!-- 引入bootstrap.css -->
  <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.2.2/dist/css/bootstrap.min.css" rel="stylesheet">
</head>

<body>
  <!-- 
    目标：使用JS控制弹框，显示和隐藏
    1. 创建弹框对象
    2. 调用弹框对象内置方法
      .show() 显示
      .hide() 隐藏
   -->
  <button type="button" class="btn btn-primary edit-btn">
    编辑姓名
  </button>

  <div class="modal name-box" tabindex="-1">
    <div class="modal-dialog">
      <div class="modal-content">
        <div class="modal-header">
          <h5 class="modal-title">请输入姓名</h5>
          <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
        </div>
        <div class="modal-body">
          <form action="">
            <span>姓名：</span>
            <input type="text" class="username">
          </form>
        </div>
        <div class="modal-footer">
          <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">取消</button>
          <button type="button" class="btn btn-primary save-btn">保存</button>
        </div>
      </div>
    </div>
  </div>

  <!-- 引入bootstrap.js -->
  <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.2.2/dist/js/bootstrap.min.js"></script>
  <script> 
    // 1. 创建弹框对象
    const modalDom = document.querySelector('.name-box')
    const modal = new bootstrap.Modal(modalDom)

    // 编辑姓名->点击->赋予默认姓名->弹框显示
    document.querySelector('.edit-btn').addEventListener('click', () => {
      document.querySelector('.username').value = '默认姓名'

      // 2. 显示弹框
      modal.show()
    })

    // 保存->点击->->获取姓名打印->弹框隐藏
    document.querySelector('.save-btn').addEventListener('click', () => {
      const username = document.querySelector('.username').value
      console.log('模拟把姓名保存到服务器上', username)

      // 2. 隐藏弹框
      modal.hide()
    })
  </script>
</body>

</html>