如何从表单验证中排除字段但保存已清除的数据

<form id="myForm">
  <input type="text" name="name" required>
  <input type="email" name="email" required>
  <input type="text" name="phone" data-validation-ignore="true">
  <button type="submit">Submit</button>
</form>

<script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
<script src="https://cdn.jsdelivr.net/jquery.validation/1.16.0/jquery.validate.min.js"></script>
<script>
  $(document).ready(function() {
    $('#myForm').validate({
      ignore: '[data-validation-ignore="true"]',
      submitHandler: function(form) {
        // 前端验证通过后，将表单数据发送到后端进行处理
        $.ajax({
          url: 'backend.php',
          method: 'POST',
          data: $(form).serialize(),
          success: function(response) {
            // 处理后端返回的响应
          }
        });
      }
    });
  });
</script>