selector instanceof jQuery,return itself

selector instanceof jQuery,return itself

Can i do this, add a judge, when selector is instanceof jQuery,return identical.
Will it cause some bug in some situation?
Thanks for anyone reply.


jQuery = function( selector, context ) {

   // add this return -->
   if(selector instanceof jQuery){
      return selector;
   }
   // <--

   
   return new jQuery.fn.init( selector, context );
},