从ajax datatable获取textbox值

<table id="myTable">
  <thead>
    <tr>
      <th>姓名</th>
      <th>年龄</th>
      <th>操作</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>张三</td>
      <td><input type="text" class="myTextbox" value="20"></td>
      <td><button class="myButton">获取值</button></td>
    </tr>
    <tr>
      <td>李四</td>
      <td><input type="text" class="myTextbox" value="25"></td>
      <td><button class="myButton">获取值</button></td>
    </tr>
  </tbody>
</table>

$(document).ready(function() {
  $('#myTable').DataTable();
  
  $('.myButton').on('click', function() {
    var textboxValue = $(this).closest('tr').find('.myTextbox').val();
    console.log(textboxValue);
  });
});