How to make a fixed menu work not at a given size, but at 0?

Question

JavaScript

There is a script:

$(function(){
          $(window).scroll(function() {
          var top = $(document).scrollTop();
          if (top < 160) $(".menu-fixed").css({top: '0', position: 'relative',});
          else $(".menu-fixed").css({top: '0', position: 'fixed'});
          });
          });

The menu is under the main screen, and when we get to it, it sticks on the screen, and not through a certain size, as for example here at 160 px.

Answer 1

if(top < $(".menu-fixed").offset()) {
//дальше все то же самое
}