first commit

public/js/modules/gototop.js

@@ -0,0 +1,46 @@
+CNVS.GoToTop = function() {
+	var __core = SEMICOLON.Core;
+
+	var _init = function(element) {
+		var elSpeed = element.getAttribute('data-speed') || 700,
+			elEasing = element.getAttribute('data-easing');
+
+		element.onclick = function(e) {
+			__core.scrollTo(0, Number(elSpeed), elEasing);
+			e.preventDefault();
+		};
+	};
+
+	var _scroll = function(element) {
+		var body = __core.getVars.elBody.classList;
+
+		var elMobile = element.getAttribute('data-mobile') || 'false',
+			elOffset = element.getAttribute('data-offset') || 450;
+
+		if( elMobile == 'false' && ( body.contains('device-xs') || body.contains('device-sm') || body.contains('device-md') ) ) {
+			return true;
+		}
+
+		if( window.scrollY > Number(elOffset) ) {
+			body.add('gototop-active');
+		} else {
+			body.remove('gototop-active');
+		}
+	};
+
+	return {
+		init: function(selector) {
+			selector = __core.getSelector( selector, false );
+			if( selector.length < 1 ){
+				return true;
+			}
+
+			_init(selector[0]);
+			_scroll(selector[0]);
+
+			window.addEventListener('scroll', function(){
+				_scroll(selector[0]);
+			}, {passive:true});
+		}
+	};
+}();