snippet gs_bootstrap nav scolling

snippet gs_bootstrap nav scolling

		$(function(){
			var $navbar = $('nav');

			$(window).scroll(function() {
				$navbar.toggleClass('scrolled', $(window).scrollTop() > 40);
			});

			$('.nav-toggle').click(function(){
				$navbar.toggleClass('expanded');
			});

			$("a[href^='#']").click(function(e) {
				e.preventDefault();
				var $target = $(this.hash);
				if ($target.length) {
					var navHeight;
					if ($navbar.hasClass('expanded')) {
						navHeight = $('.navbar-header').outerHeight();
					}
					else {
						navHeight = $navbar.height();
					}
					var offset = Math.max(0, $target.offset().top - navHeight);
					$('html, body').animate({scrollTop: offset}, 300);
				}
				$navbar.removeClass('expanded');
			});

			$(window).scrollspy({ target: 'nav', offset: 200 }).scroll();
		});