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我正在尝试获取具有特定 id 的元素的类,如下所示。我将有多个字段生成两个带有“添加新”选项的下拉列表,但选项有不同的类,第一种情况是“animal_species”,第二种情况是“animal_condition”。在下拉列表中选择“添加新”时,会弹出一个模式窗口,其中包含一个文本字段,可在其中向下拉列表输入新选项。这是模态窗口:

  <!-- add-new field -->
  <div class="modal small hide fade" id="add-new" tabindex="-1" role="dialog" aria-labelledby="add-new-fieldLabel" aria-hidden="true">
      <div class="modal-header">
        <button type="button" class="close" data-dismiss="modal" aria-hidden="true">√ó&lt;/button>
        <h3 id="add-new-fieldLabel">Add New Field</h3>
      </div>
      <div class="modal-body">

          <p>Would you like to add a new item?</p>
          <input type="text" id="add-new-text" name="add-new-text" placeholder="Type the new option">

      </div>

      <div class="modal-footer">
        <button type="button" class="btn btn-success" id="add-new-submit" name="add-new-submit"/>Add</button>
      </div>
 </div><!-- /add-new field -->

文本字段的 jQuery 是

      $('#upload_form option[value="addnew"]').click(function(){

          // Show modal window
          $('#add-new').modal('show');

          $('#add-new-submit').on('click', function(){                

              // Get new option from text field
              var value = $('#add-new-text').val();
              console.log(value);

              // Get the class
              //var Classofentry = $('#upload_form option[class]').attr("class");
              var Classofentry = $('#upload_form option[class]').attr("class");
              console.log(Classofentry);

              $.ajax({
                    type: "POST",
                    url: "<?php echo site_url(); ?>main/change_options",
                    data: {new_option: value, new_option_class: Classofentry},
                    dataType: "html",
                    error: errorHandler,
                    success: success
                  });

              function success(data){

                  //$('#animal_species').append("<option value='" + data + "'selected=\"selected\">" + data + "</option>"); // This might work ...
                  $('#'+Classofentry).append("<option value='" + data + "'selected=\"selected\">" + data + "</option>"); // This might work ...
                  alert(data);

                  //alert('Success!');

              }

              function errorHandler(){
                  alert('Error with AJAX!');
              }                              

              $('#add-new').modal('toggle');                              
           });

      }); 

  </script>

效果很好,除了现在我添加了第二个“Animal Condition”元素,在模式中输入的文本被放入第一个(“Animal Species”)元素中,因为“Classofentry”始终是“animal_species”而不是生成模态的元素的类。如何在 jQuery 中访问该类?或者也许我需要对多个字段进行不同的实现?尝试了很多东西,但还没有到位。帮助!

这是我如何让它工作的(感谢您的评论!):

  <script type="text/javascript">

      $('#upload_form option[value="addnew"]').click(function(){

          // Show modal window
          $('#add-new').modal('show');

          // Get the class
          //var Classofentry = $('#upload_form option[class]').attr("class");
          var Classofentry = $(this).attr("class");
          console.log(Classofentry);

          $('#add-new-submit').on('click', function(){                

              // Get new option from text field
              var value = $('#add-new-text').val();
              console.log(value);

              $.ajax({
                    type: "POST",
                    url: "<?php echo site_url(); ?>main/change_options",
                    data: {new_option: value, new_option_class: Classofentry},
                    dataType: "html",
                    error: errorHandler,
                    success: success
                  });

              function success(data){

                  //$('#animal_species').append("<option value='" + data + "'selected=\"selected\">" + data + "</option>"); // This might work ...
                  $('#'+Classofentry).append("<option value='" + data + "'selected=\"selected\">" + data + "</option>"); // This might work ...
                  alert(data);

                  //alert('Success!');

              }

              function errorHandler(){
                  alert('Error with AJAX!');
              }                              

              $('#add-new').modal('toggle');                              
           });

      }); 

  </script>

我将 $(this) 元素向上移动以访问所选选项。

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