<label>内有内容时显示上方标题,无内容时不显示标题，急求

Question

     <div class="title pesticide">
                产品信息
            </div>
          <div class="mui-card" style="margin-bottom: 15px;">
              <ul class="mui-table-view">
                <li class="mui-table-view-cell">
                  <label class="text_title" >产品名称：</label>
                  <label><?php echo $pro_name;?></label>
                </li>
                <li class="mui-table-view-cell">
                  <label class="text_title">登记证号：</label>
                  <label><?php echo $djzh;?></label>
                </li>
                <li class="mui-table-view-cell">
                  <label class="text_title">类别：</label>
                  <label><?php echo $nylb;?></label>
                </li>
                <li class="mui-table-view-cell">
                  <label class="text_title">公司名：</label>
                  <label><?php echo $jhl;?></label>
                </li>
                <li class="mui-table-view-cell">
                  <label class="text_title">生产日期：</label>
                  <label><?php echo $zyxcfhl;?></label>
                </li>
                <li class="mui-table-view-cell">
                  <label class="text_title">剂型：</label>
                  <label><?php echo $jx;?></label>
                </li>
              <!--  <li class="mui-table-view-cell">
                  <label class="text_title">毒性：</label>
                  <label><?php echo $dx;?></label>
                </li>
                <li class="mui-table-view-cell">
                  <label class="text_title">生产日期：</label>
                  <label><?php echo $adddate;?></label>
                </li>-->
                <li class="mui-table-view-cell">
                  <label class="text_title">批号：</label>
                  <label><?php echo $riqi;?></label>
                </li>
                <li class="mui-table-view-cell">
                  <label class="text_title">有效期：</label>
                  <label><?php echo $bzq;?></label>
                </li>
                <li class="mui-table-view-cell">
                  <label class="text_title">生产厂家：</label>
                  <label><?php echo $djzcyr;?></label>
                </li>
                <li class="mui-table-view-cell">
                  <label class="text_title">生产许可证（或生产批准文件）号：</label>
                  <label><?php echo $xkzh;?></label>
                </li>
                <li class="mui-table-view-cell">
                  <label class="text_title">产品标准号：</label>
                  <label><?php echo $bzzh;?></label>
                </li>
              </ul>
            </div>

Answer 1

先给label标签定一个类名，<label class=‘label’><?php echo $bzzh;?></label>
获取改标签的内容
var names = document.querySelector('.label');
var tilte= document.querySelector('.title');
var result = names.innerHTML;
给个判断
if(result ){
  title.style.display ='block';
}else{
  title.style.display ='none';
}不知道你是不是这个意思