clickHandler = function (event) {

			// Don't run if event was canceled but still bubbled up
			// By @mgreter - https://github.com/cferdinandi/smooth-scroll/pull/462/
			if (event.defaultPrevented) return;

			// Don't run if right-click or command/control + click or shift + click
			if (event.button !== 0 || event.metaKey || event.ctrlKey || event.shiftKey) return;

			// Check if event.target has closest() method
			// By @totegi - https://github.com/cferdinandi/smooth-scroll/pull/401/
			if (!('closest' in event.target)) return;

			// Check if a smooth scroll link was clicked
			toggle = event.target.closest(selector);
			if (!toggle || toggle.tagName.toLowerCase() !== 'a' || event.target.closest(settings.ignore)) return;

			// Only run if link is an anchor and points to the current page
			if (toggle.hostname !== window.location.hostname || toggle.pathname !== window.location.pathname || !/#/.test(toggle.href)) return;

			// Get an escaped version of the hash
			var hash;
			try {
				hash = escapeCharacters(decodeURIComponent(toggle.hash));
			} catch(e) {
				hash = escapeCharacters(toggle.hash);
			}

			// Get the anchored element
			var anchor;
			if (hash === '#') {
				if (!settings.topOnEmptyHash) return;
				anchor = document.documentElement;
			} else {
				anchor = document.querySelector(hash);
			}
			anchor = !anchor && hash === '#top' ? document.documentElement : anchor;

			// If anchored element exists, scroll to it
			if (!anchor) return;
			event.preventDefault();
			setHistory(settings);
			smoothScroll.animateScroll(anchor, toggle);

		}
If smooth scroll element clicked, animate scroll