使用 jquery 隐藏 Qualtrics 中的列表项

Question

我可以使用常规 JavaScript 在 Qualtrics 中隐藏列表项（本例中的第一个）。下面的截图显示了我的问题。

这是我输入的javascriptwindow属于问题的代码：

Qualtrics.SurveyEngine.addOnload(function()
{
    /*Place Your JavaScript Here*/

    $(this.questionId).getElementsByClassName("ChoiceStructure")[0].getElementsByTagName("li")[0].style.display = "none";

});

我想知道如何用 jQuery 实现同样的效果？

我已经成功安装了 jQuery 感谢 this handy guide 添加

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.0/jquery.min.js"></script>

在 header 的源视图中。另外，我在属于这个问题的 javascript window 的顶部添加了 var jq = jQuery.noConflict(); 。

进一步查看源码发现题目ID为QID2。基于 this answer 因此我尝试了

$("#QID2 .ChoiceStructure ul li:eq(0)").hide();

但没有成功。

请注意 理想情况下我不想手动指定问题 ID，而是像我使用常规 JavaScript.[=20 一样参考问题=]

编辑：qualtrics 问题的 html 是：

<div class="QuestionOuter BorderColor MC  QID2" id="QID2" questionid="QID2" posttag="QID2" data-runtime-remove-class-hidden="runtime.Displayed"> 

    <div class="ValidationError" data-runtime-html="runtime.ErrorMsg" data-runtime-show="runtime.ErrorMsg" style="display: none;"></div> <div class="Inner BorderColor SAVR"> 

        <div class="InnerInner BorderColor TX"> 

            <fieldset> 

            <!-- BEGIN PARTIALS -->
            <!-- Partial for defining the ControlContainerContent -->
            <!-- END PARTIALS -->

            <h2 class="noStyle"><div class="QuestionText BorderColor">Text</div></h2>

            <div class="QuestionBody"> 

                <!-- Begin Choices w/o choice groups --> 

                <ul class="ChoiceStructure">    

                    <li class="Selection reg"> <input choiceid="1" aria-labelledby="QID2-1-label" class="radio QR-QID2-1 QWatchTimer" type="radio" name="QR~QID2" id="QR~QID2~1" value="1" data-runtime-checked="runtime.Selected"><label for="QR~QID2~1" class="q-radio" data-runtime-class-q-checked="runtime.Choices.1.Selected"></label>  <span class="LabelWrapper">  <label for="QR~QID2~1" id="QID2-1-label" class="SingleAnswer" data-runtime-class-q-checked="runtime.Choices.1.Selected">   <span>a (0)</span></label></span> <div class="clear"></div> </li>   
                    <li class="Selection alt"> <input choiceid="2" aria-labelledby="QID2-2-label" class="radio QR-QID2-2 QWatchTimer" type="radio" name="QR~QID2" id="QR~QID2~2" value="2" data-runtime-checked="runtime.Selected"><label for="QR~QID2~2" class="q-radio" data-runtime-class-q-checked="runtime.Choices.2.Selected"></label>  <span class="LabelWrapper">  <label for="QR~QID2~2" id="QID2-2-label" class="SingleAnswer" data-runtime-class-q-checked="runtime.Choices.2.Selected">   <span>a (1)</span></label></span> <div class="clear"></div> </li>   
                    <li class="Selection reg"> <input choiceid="3" aria-labelledby="QID2-3-label" class="radio QR-QID2-3 QWatchTimer" type="radio" name="QR~QID2" id="QR~QID2~3" value="3" data-runtime-checked="runtime.Selected"><label for="QR~QID2~3" class="q-radio" data-runtime-class-q-checked="runtime.Choices.3.Selected"></label>  <span class="LabelWrapper">  <label for="QR~QID2~3" id="QID2-3-label" class="SingleAnswer" data-runtime-class-q-checked="runtime.Choices.3.Selected">   <span>b (2)</span></label></span> <div class="clear"></div> </li>   
                    <li class="Selection alt"> <input choiceid="4" aria-labelledby="QID2-4-label" class="radio QR-QID2-4 QWatchTimer" type="radio" name="QR~QID2" id="QR~QID2~4" value="4" data-runtime-checked="runtime.Selected"><label for="QR~QID2~4" class="q-radio" data-runtime-class-q-checked="runtime.Choices.4.Selected"></label>  <span class="LabelWrapper">  <label for="QR~QID2~4" id="QID2-4-label" class="SingleAnswer" data-runtime-class-q-checked="runtime.Choices.4.Selected">   <span>b (3)</span></label></span><div class="clear"></div> </li>   

                </ul> 
                <!-- End Choices w/o choice groups --> 

                <div class="clear zero"></div>

            </div> 

            </fieldset> 

        </div> 

    </div> 

</div>

Answer 1

也许你在JQuery请求中添加的一些规则（我的意思是括号内$(here)）无效并且JQuery returns错误link 到节点元素（或 returns "undefined"）。我猜想在上次使用 .class ul li 构建时出现了问题（因为你向 ul 添加了 class）。所以你需要使用

$("#QID2 ul li:eq(0)") 或

$("#QID2 ul.ChoiceStructure li:eq(0)"

关于参考问题 - 您可以像在普通 JS 中一样使用变量，并使用像

这样的简单连接在 JQuery 中添加值

$("#QID"+variableWithQuestionNumber+" li:eq(0)")

(function(){
  var counter = 0;
  $(".myButton").click(function(e){
    if (counter===0){
      $("#QID2 ul li:eq(0)").hide();
      counter++;
    }else{
      $("#QID2 ul li:eq(0)").show();
      counter--;
    }
  });

})();

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.10.0/jquery.min.js"></script>
<div class="QuestionOuter BorderColor MC  QID2" id="QID2" questionid="QID2" posttag="QID2" data-runtime-remove-class-hidden="runtime.Displayed">

  <div class="ValidationError" data-runtime-html="runtime.ErrorMsg" data-runtime-show="runtime.ErrorMsg" style="display: none;"></div>
  <div class="Inner BorderColor SAVR">

    <div class="InnerInner BorderColor TX">

      <fieldset>

        <!-- BEGIN PARTIALS -->
        <!-- Partial for defining the ControlContainerContent -->
        <!-- END PARTIALS -->

        <h2 class="noStyle"><div class="QuestionText BorderColor">Text</div></h2>

        <div class="QuestionBody">

          <!-- Begin Choices w/o choice groups -->

          <ul class="ChoiceStructure">

            <li class="Selection reg">
              <input choiceid="1" aria-labelledby="QID2-1-label" class="radio QR-QID2-1 QWatchTimer" type="radio" name="QR~QID2" id="QR~QID2~1" value="1" data-runtime-checked="runtime.Selected">
              <label for="QR~QID2~1" class="q-radio" data-runtime-class-q-checked="runtime.Choices.1.Selected"></label> <span class="LabelWrapper">  <label for="QR~QID2~1" id="QID2-1-label" class="SingleAnswer" data-runtime-class-q-checked="runtime.Choices.1.Selected">   <span>a (0)</span>
              </label>
              </span>
              <div class="clear"></div>
            </li>
            <li class="Selection alt">
              <input choiceid="2" aria-labelledby="QID2-2-label" class="radio QR-QID2-2 QWatchTimer" type="radio" name="QR~QID2" id="QR~QID2~2" value="2" data-runtime-checked="runtime.Selected">
              <label for="QR~QID2~2" class="q-radio" data-runtime-class-q-checked="runtime.Choices.2.Selected"></label> <span class="LabelWrapper">  <label for="QR~QID2~2" id="QID2-2-label" class="SingleAnswer" data-runtime-class-q-checked="runtime.Choices.2.Selected">   <span>a (1)</span>
              </label>
              </span>
              <div class="clear"></div>
            </li>
            <li class="Selection reg">
              <input choiceid="3" aria-labelledby="QID2-3-label" class="radio QR-QID2-3 QWatchTimer" type="radio" name="QR~QID2" id="QR~QID2~3" value="3" data-runtime-checked="runtime.Selected">
              <label for="QR~QID2~3" class="q-radio" data-runtime-class-q-checked="runtime.Choices.3.Selected"></label> <span class="LabelWrapper">  <label for="QR~QID2~3" id="QID2-3-label" class="SingleAnswer" data-runtime-class-q-checked="runtime.Choices.3.Selected">   <span>b (2)</span>
              </label>
              </span>
              <div class="clear"></div>
            </li>
            <li class="Selection alt">
              <input choiceid="4" aria-labelledby="QID2-4-label" class="radio QR-QID2-4 QWatchTimer" type="radio" name="QR~QID2" id="QR~QID2~4" value="4" data-runtime-checked="runtime.Selected">
              <label for="QR~QID2~4" class="q-radio" data-runtime-class-q-checked="runtime.Choices.4.Selected"></label> <span class="LabelWrapper">  <label for="QR~QID2~4" id="QID2-4-label" class="SingleAnswer" data-runtime-class-q-checked="runtime.Choices.4.Selected">   <span>b (3)</span>
              </label>
              </span>
              <div class="clear"></div>
            </li>

          </ul>
          <!-- End Choices w/o choice groups -->

          <div class="clear zero"></div>

        </div>

      </fieldset>

    </div>

  </div>

</div>

<input type="button" class="myButton" value="Push me"/>

Answer 2

您可以使用原型 js（Qualtrics 已经使用过）来非常简单地完成它：

Qualtrics.SurveyEngine.addOnload(function()
{
    $(this.questionId).down('li').hide();
});

使用 jquery 隐藏 Qualtrics 中的列表项

Hide list item in Qualtrics with jquery

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