JS中给元素添加父级标签-CFANZ编程社区

<!DOCTYPE html>
 <html lang="en">
 <head>
     <meta charset="UTF-8">
     <title>每日一文</title>
 </head>
 <body>
     <div class="shuai">shuai1</div>
     <div class="shuai">shuai2</div>
     <script>
         var lables = document.querySelectorAll('.shuai')
         var elem = document.createElement('div')
         elem.className='mq-supsub mq-non-leaf';
         lables.forEach(function (lable,index) {
              lable.parentNode.replaceChild(elem, lable)
              elem.appendChild(lable)
          })
     </script></body>
 </html>