$( ".selector" ).draggable({ helper: "clone" });
       
      

      

       

        // getter
       
      
      

       

        var helper = $( ".selector" ).draggable( "option", "helper" );
       
      
      

       

         
       
      
      

       

        // setter
       
      
      

       

        $( ".selector" ).draggable( "option", "helper", "clone" );
        

        

        

        

        

        I found these codes,but where to add this?