yui3-scroll-to-anchor.js

YUI().use('node', 'anim', function (Y) {
	Y.on('domready', function () {
		(function () {
			Y.one('body').delegate('click', function (e) {
				e.preventDefault();
				var anchor = e.currentTarget.getAttribute('href');
				var scrollAnim = new Y.Anim({
					node: Y.one(Y.UA.gecko || Y.UA.ie || !!navigator.userAgent.match(/Trident.*rv.11\./) ? 'html' : 'body'),
					to: {
						scrollTop : Y.one(anchor).getY()
					},
					duration: 0.4,
					easing: 'easeOut'
				});
				scrollAnim.run();
				scrollAnim.on('end', function () {
					window.location.hash = anchor;
				});
			}, '[href^="#"]');
		})();
	});
});