Ajax 无刷新分页，页码高亮显示

代码如下

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <script src="lib/jquery-3.5.1.js"></script>
    <title>Ajax无刷新分页</title>
    <style>
      table {
        border-collapse: collapse;
        border: 1px solid;
        text-align: center;
        margin: auto;
        width: 510px;
        box-shadow: 0px 0px 4px rgb(113, 114, 114);
      }
      table caption {
        font-size: 1.8rem;
        margin-bottom: 10px;
        text-shadow: 2px 2px 2px rgb(167, 168, 168);
      }
      th,
      td {
        border: 1px solid;
        padding: 5px;
      }
      tr:hover {
        background-color: #ccc;
        cursor: pointer;
      }
      thead tr:first-of-type {
        background-color: #ddd;
      }
      p {
        text-align: center;
      }
      p a {
        text-decoration: none;
        border: 1px solid;
        padding: 0 8px;
      }
      .active {
        background-color: rgb(206, 101, 101);
        border: 1px solid red;
        color: white;
      }
    </style>
  </head>
  <body>
    <table>
      <caption>
        员工信息表
      </caption>
      <thead>
        <tr>
          <th>id</th>
          <th>姓名</th>
          <th>年龄</th>
          <th>性别</th>
          <th>职位</th>
          <th>手机号</th>
        </tr>
      </thead>
      <tbody></tbody>
    </table>
    <!-- 分页条 -->
    <p></p>
  </body>
  <script>
    // 默认是第1页
    var page = 1;
    // 默认显示第一页,用一个函数来实现显示
    getPageData(page);
    // 分页函数
    function getPageData(page) {
      // ajax无刷新分页
      $.ajax({
        type: "post",
        url: "page_data.php",
        data: { page: page },
        dataType: "json",
        success: show,
      });
    }
    // 数据显示函数
    function show(data) {
      // 1. 显示表格数据
      var str = "";
      data.staffs.forEach(function (staff) {
        str += "<tr>";
        str += "<td>" + staff.id + "</td>";
        str += "<td><input type='text' value=" + staff.name + "></td>";
        str += "<td>" + staff.age + "</td>";
        str += "<td>" + staff.sex + "</td>";
        str += "<td>" + staff.position + "</td>";
        str += "<td>" + staff.mobile + "</td>";
        str += "</tr>";
      });
      $("tbody").html(str);
      // 2. 显示分页条
      var str = "";
      for (var i = 1; i <= data.pages; i++) {
        str += '<a href="" data-index=' + i + ">" + i + "</a> ";
      }
      // 将页码添到分页条, 并将当前页置为高亮
      $("p")
        .html(str)
        .find("a")
        .eq(page - 1)
        .addClass("active");
      // 分页条的点击事件
      $("p a").click(function (ev) {
        // 禁用<a>的跳转默认行为
        ev.preventDefault();
        page = $(this).attr("data-index");
        $("tbody").html("");
        getPageData(page);
      });
    }
  </script>
</html>