Layui pops up an instance of the deletion confirmation interface

<td>
    <a href="{:U('Single/single',['sid'=>$ls['sid']])}" rel="external nofollow" class="layui-btn layui-btn-mini">
     edit
    </a>
   <a href="javascript:;" rel="external nofollow" data- data-opt="del" class="layui-btn layui-btn-danger layui-btn-mini del">
     delete
   </a>
 </td>

<script type="text/javascript">
  ('layer', function(){
    var $ = ;
    // Delete operation    $('').click(function() 
    {
      var sid = $(this).data('id');// Get the id of the click item      
      ("Confirm to delete it, it cannot be restored after deletion", { title: "Delete Confirm" }, function (index) {
        
        $.post("{:U('Admin/Single/del')}", { sid: sid }, function (data) 
        {
           var num = ==200 ? 1 : 2;
           (,{icon:num,shade:0.3,offset: '40%',time:2000});

           //(index); //If the yes callback is set, it needs to be manually closed           setTimeout(function(){
             //refresh             ();
           },1000);
        });
      }); 

    })
  })
</script>