Question

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

这是我输入属于问题的javascript窗口的代码：

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实现同样的目标？

我已成功安装了jQuery，感谢this handy guide添加

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

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

通过进一步检查源代码，我发现问题的ID是QID2。根据{{3}}，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，而是像常规JavaScript一样引用问题。

编辑：质量问题的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

你可以使用prototypejs（Qualtrics已经使用过）来完成它：

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

Answer 2

您在JQuery请求中添加的一些规则（我的意思是在括号$(here)中）可能无效，JQuery返回错误的节点元素链接（或返回＆＃34; undefined＆＃34;）。我在最后一次构建中使用.class ul li来解决问题（因为你将类添加到了ul）。所以你需要使用

$("#QID2 ul li:eq(0)") 或

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

关于引用问题 - 您可以像在普通JS中一样使用变量，并使用简单的连接在中添加值

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

＆＃13;

(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--;
    }
  });

})();

＆＃13;

<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"/>

＆＃13;

使用jquery隐藏Qualtrics中的列表项

2 个答案: