javascript - 当跨度不包含内容时隐藏父级

Question

我一直在网站上下浏览以及与此相关的各种问题，我找不到解决方案。

每当我的跨度“specvalue”不包含数据时，我都会尝试隐藏我的父 div“行”

    <div class="container-fluid" id="itmSpecsTbl">
 <div class="row" id="row"><div class="col-xs-6" align="left"><b>Accuracy</b> </div><div class="col-xs-6" align="right"><span id="specvalue"><%=getAttribute('item','127559','custitem1','')%></span> </div></div>
 <div class="row" id="row"><div class="col-xs-6" align="left"><b>Drive Type</b> </div><div class="col-xs-6" align="right"><span id="specvalue"><%=getAttribute('item','127559','custitem2','')%></span> </div></div>
 <div class="row" id="row"><div class="col-xs-6" align="left"><b>Free Speed</b> </div><div class="col-xs-6" align="right"><span id="specvalue"><%=getAttribute('item','127559','custitem4','')%></span> RPM</div></div>
 <div class="row" id="row"><div class="col-xs-6" align="left"><b>Increments</b> </div><div class="col-xs-6" align="right"><span id="specvalue"><%=getAttribute('item','127559','custitem5','')%></span> </div></div>
 <div class="row" id="row"><div class="col-xs-6" align="left"><b>Length</b> </div><div class="col-xs-6" align="right"><span id="specvalue"><%=getAttribute('item','127559','custitem6','')%></span> In</div></div>
 <div class="row" id="row"><div class="col-xs-6" align="left"><b>Length</b> </div><div class="col-xs-6" align="right"><span id="specvalue"><%=getAttribute('item','127559','custitem7','')%></span> mm</div></div>
 <div class="row" id="row"><div class="col-xs-6" align="left"><b>Max Air Consumption</b> </div><div class="col-xs-6" align="right"><span id="specvalue"><%=getAttribute('item','127559','custitem8','')%></span> </div></div>
 <div class="row" id="row"><div class="col-xs-6" align="left"><b>Air Inlet (NPT)</b> </div><div class="col-xs-6" align="right"><span id="specvalue"><%=getAttribute('item','127559','custitem37','')%></span> </div></div>  
 <div class="row" id="row"><div class="col-xs-6" align="left"><b>Min Torque</b> </div><div class="col-xs-6" align="right"><span id="specvalue"><%=getAttribute('item','127559','custitem9','')%></span> ft lb</div></div>
 <div class="row" id="row"><div class="col-xs-6" align="left"><b>Max Torque</b> </div><div class="col-xs-6" align="right"><span id="specvalue"><%=getAttribute('item','127559','custitem10','')%></span> ft lb</div></div>
 <div class="row" id="row"><div class="col-xs-6" align="left"><b>Min Torque</b> </div><div class="col-xs-6" align="right"><span id="specvalue"><%=getAttribute('item','127559','custitem11','')%></span> in lb</div></div>
 <div class="row" id="row"><div class="col-xs-6" align="left"><b>Max Torque</b> </div><div class="col-xs-6" align="right"><span id="specvalue"><%=getAttribute('item','127559','custitem12','')%></span> in lb</div></div>
 <div class="row" id="row"><div class="col-xs-6" align="left"><b>Min Torque</b> </div><div class="col-xs-6" align="right"><span id="specvalue"><%=getAttribute('item','127559','custitem13','')%></span> in oz</div></div>
 <div class="row" id="row"><div class="col-xs-6" align="left"><b>Max Torque</b> </div><div class="col-xs-6" align="right"><span id="specvalue"><%=getAttribute('item','127559','custitem14','')%></span> in oz</div></div>
 <div class="row" id="row"><div class="col-xs-6" align="left"><b>Min Torque</b> </div><div class="col-xs-6" align="right"><span id="specvalue"><%=getAttribute('item','127559','custitem15','')%></span> kgf cm</div></div>
 <div class="row" id="row"><div class="col-xs-6" align="left"><b>Max Torque</b> </div><div class="col-xs-6" align="right"><span id="specvalue"><%=getAttribute('item','127559','custitem16','')%></span> kgf cm</div></div>
 <div class="row" id="row"><div class="col-xs-6" align="left"><b>Capacity</b> </div><div class="col-xs-6" align="right"><span id="specvalue"><%=getAttribute('item','127559','custitemfi0073','')%></span> lbs</div></div>
 <div class="row" id="row"><div class="col-xs-6" align="left"><b>Min Reach</b> </div><div class="col-xs-6" align="right"><span id="specvalue"><%=getAttribute('item','127559','custitemfi0103','')%></span> in</div></div>
 <div class="row" id="row"><div class="col-xs-6" align="left"><b>Max Reach</b> </div><div class="col-xs-6" align="right"><span id="specvalue"><%=getAttribute('item','127559','custitemfi0104','')%></span> in</div></div> 
</div>

“getAttribute”用于在没有数据时提取我的元素的数据。它是空白的 - 没有空格，什么都没有。

我试过使用 :empty, :blank

#specvalue:empty #row, #specvalue:blank #row { display: none; }

这让我无处可去，jquery 也是如此

$("#specvalue:empty").parent().hide();

到目前为止没有任何效果，我什至尝试将脚本放在 <head> 中标签，甚至在技术文档被调用之后。

您认为我需要更具体地说明 CSS 吗？我看到它适用于其他示例，但不适用于此。

Answer 1

我删除了重复的 id="row" 并将 id="specvalue" 替换为 class="specvalue"。然后用一些简单的 jquery 隐藏了所有具有空 specvalue 的行。

注意:始终牢记 id 的始终在整个 html 页面中必须是唯一的!

$('.specvalue').each(function(i, v) {
  if ($(this).html() === '') {
    $(this).closest('.row').hide();
  }
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="container-fluid" id="itmSpecsTbl">
  <div class="row">
    <div class="col-xs-6" align="left"><b>Accuracy</b> 
    </div>
    <div class="col-xs-6" align="right"><span class="specvalue">A</span> 
    </div>
  </div>
  <div class="row">
    <div class="col-xs-6" align="left"><b>Drive Type</b> 
    </div>
    <div class="col-xs-6" align="right"><span class="specvalue"></span> 
    </div>
  </div>
  <div class="row">
    <div class="col-xs-6" align="left"><b>Free Speed</b> 
    </div>
    <div class="col-xs-6" align="right"><span class="specvalue">B</span> RPM</div>
  </div>
</div>