nick.js

$(function() {
  fixedHeader();
});
$(window).scroll(function() {
    fixedHeader();
});
$(window).resize(function() {
    fixedHeader();
});


function fixedHeader() {
   
   
            var yScroll = $(window).scrollTop();
            var distance = 80- yScroll;

            // distance = distance + 80;

            if (distance <= 0) {
               $('body').addClass('sticky');
            } else {
                $('body').removeClass('sticky');
            }
       
}