remain-scrolled-across-page-reload.js

document.addEventListener("DOMContentLoaded", function() {
	var storage = window.sessionStorage;
	try {
		if (window.location.pathname.includes('#')) {
			storage.removeItem('scroll-x');
			storage.removeItem('scroll-y');
			return;
		}
		var x = storage.getItem('scroll-x');
		var y = storage.getItem('scroll-y');
		if (x && y) {
			window.scrollTo(x, y);
		}

		window.addEventListener('pagehide', function() {
			try {
				storage.setItem('scroll-x', window.pageXOffset);
				storage.setItem('scroll-y', window.pageYOffset);
			}
			catch (e) {
				return;
			}
		});
	}
	catch (e) {
		return; // no sessionStorage support
	}
});