JS, jQuery: Sticky element on top. #snippet

sticky-header-ie8.js

	// Sticky Element on scroll
	var sticky = $('.selector');
	var top = sticky.offset().top - parseFloat(sticky.css('margin-top').replace(/auto/, 0));
	$(window).scroll(function (event) {
		var y = $(this).scrollTop();
		y >= top ? sticky.addClass('fixed') : sticky.removeClass('fixed');
	});

sticky-header.js

	// Sticky Element on scroll
	var sticky = document.querySelector('.selector');
	var origOffsetY = sticky.offsetTop;
	function onScroll(e) {
		window.scrollY >= origOffsetY ? sticky.classList.add('fixed') : sticky.classList.remove('fixed');
	}
	document.addEventListener('scroll', onScroll);