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function (Moduler) {\r\n    'use strict';\r\n\r\n    return Moduler.create({\r\n        defaults: {\r\n            wrapper: '<div class=\"Sticky\" />', // set to false to disable wrapper element\r\n            wrapperClass: null,     // additional css class for wrapper\r\n            stickyActiveClass: 'is-sticky', // css class to add when actively sticky\r\n            stickyHiddenClass: 'is-stickyHidden',\r\n            stickyBottomClass: 'is-stickyBottom',\r\n            offsetTop: 0,           // [selector or pixels] offset from where to start being sticky\r\n            widthFromWrapper: true, // the fixed element will have its width from wrapper element\r\n            innerScrolling: true,   // scroll the sticky element if it is taller than the viewport\r\n            contained: false,       // keep element sticky within its container\r\n            autoHide: false,        // will hide sticky element when scrolling down, and show on scroll up\r\n            autoHideOffset: 300,    // extra pixels offset until hidden\r\n            autoShowOffset: 300,    // offset until scrolling up will show element. set to 0 to disable. \r\n            minScreenWidth: null,   // mininum screen width when sticky is active\r\n            maxScreenWidth: null    // maxium screen width when sticky is active\r\n        },\r\n\r\n        init: function () {\r\n            var self = this;\r\n\r\n            self.doc = document;\r\n            self.window = window;\r\n            self.wrapper = self.el; // default if wrapper is disabled\r\n            self.isSticky = false; // if element is currently fixed/sticky\r\n            self.isDisabled = false;\r\n            self.cache = {};\r\n            self.offset = 0; // used for inner scrolling offsets\r\n            self.forceShow = false; // force show an auto-hidden sticky element\r\n\r\n            if (self.options.wrapper) {\r\n                self.el.classList.add('Sticky-element');\r\n\r\n                self.el.insertAdjacentHTML(\"beforebegin\", self.options.wrapper);\r\n                self.el.previousElementSibling.appendChild(self.el);\r\n                self.wrapper = self.el.parentElement;\r\n\r\n                if (self.options.wrapperClass) {\r\n                    self.wrapper.classList.add(self.options.wrapperClass);\r\n                }\r\n            }\r\n\r\n            self.container = self.wrapper.parentElement;\r\n\r\n            if (self.options.contained) {\r\n                // container element has to be relative for \"is-stickyBottom\" to work\r\n                self.container.style.position = 'relative';\r\n            }\r\n\r\n            function recalcAndTick() {\r\n                self.recalc();\r\n\r\n                if (!self.isDisabled) {\r\n                    self.tick();\r\n                }\r\n            }\r\n\r\n            self.listener = function () {\r\n                (window.requestAnimationFrame && requestAnimationFrame(Moduler.utils.bind(self.tick, self))) || setTimeout(Moduler.utils.bind(self.tick, self), 16);\r\n            };\r\n\r\n            window.addEventListener('scroll', self.listener);\r\n            window.addEventListener('resize', self.listener);\r\n\r\n            self.listener();\r\n\r\n            self.el.addEventListener('recalc', Moduler.utils.bind(recalcAndTick, self));\r\n            self.el.addEventListener('tick', Moduler.utils.bind(self.tick, self));\r\n            self.el.addEventListener('show', Moduler.utils.bind(self.tick, self));\r\n            self.el.addEventListener('enable', Moduler.utils.bind(self.enable, self));\r\n            self.el.addEventListener('disable', Moduler.utils.bind(self.disable, self));\r\n        },\r\n\r\n        /*\r\n         * Recalculates the cached properties.\r\n         * This is an expensive method and is only called on resize event \r\n         * and when height of document changes.\r\n         */\r\n        recalc: function () {\r\n            var self = this,\r\n                cache = self.cache;\r\n\r\n            if (typeof (self.options.offsetTop) === 'string') {\r\n                var totalHeight = 0;\r\n                var parsed = parseInt(self.options.offsetTop, 10);\r\n                if (!isNaN(parsed)) {\r\n                    totalHeight = parsed;\r\n                } else {\r\n                    // sum the heights of all elements matching selector\r\n                    document.querySelectorAll(self.options.offsetTop).forEach(o => {\r\n                        totalHeight += self.getHeight(o);\r\n                    });\r\n                }\r\n\r\n                cache.offsetTop = totalHeight;\r\n            } else {\r\n                cache.offsetTop = self.options.offsetTop;\r\n            }\r\n\r\n            self.el.style.top = cache.offsetTop + \"px\";\r\n\r\n            cache.previousScrollTop = 0;\r\n\r\n            // document/window\r\n            cache.documentHeight = self.getHeight(self.doc);\r\n            cache.windowHeight = self.getHeight(self.window);\r\n\r\n            // element\r\n            cache.elementHeight = self.getHeight(self.el);\r\n\r\n            // wrapper\r\n            cache.wrapperWidth = self.getWidth(self.wrapper);\r\n            cache.wrapperOffsetTop = self.wrapper.offsetTop - cache.offsetTop;\r\n\r\n            // container\r\n            cache.containerOffsetTop = self.container.offsetTop;\r\n            cache.containerHeight = self.getHeight(self.container);\r\n            cache.containerEndOffsetTop = self.cache.containerHeight + self.cache.containerOffsetTop - self.cache.elementHeight;\r\n\r\n            // auto hide\r\n            cache.autoHideOffsetTop = self.cache.wrapperOffsetTop + self.cache.elementHeight + self.options.autoHideOffset;\r\n\r\n            if (!self.isDisabled) {\r\n                // set wrapper to same height as content to take space when content is sticky/fixed.\r\n                self.wrapper.style.height = cache.elementHeight + \"px\";\r\n\r\n                if (self.options.widthFromWrapper) {\r\n                    // update width of sticky element\r\n                    self.el.style.width = cache.wrapperWidth + \"px\";\r\n                }\r\n            }\r\n\r\n            if (self.options.minScreenWidth || self.options.maxScreenWidth) {\r\n                var windowWidth = self.window.outerWidth,\r\n                    isWiderThanMinWidth = !self.options.minScreenWidth || windowWidth > self.options.minScreenWidth,\r\n                    isSmallerThanMaxWidth = !self.options.maxScreenWidth || windowWidth < self.options.maxScreenWidth,\r\n                    isAllowedSpan = isWiderThanMinWidth && isSmallerThanMaxWidth;\r\n\r\n                if (isAllowedSpan && self.isDisabled) {\r\n                    self.enable();\r\n                } else if (!isAllowedSpan && !self.isDisabled) {\r\n                    self.disable();\r\n                }\r\n            }\r\n        },\r\n\r\n        /*\r\n         * Tick is called on every scroll event.\r\n         */\r\n        tick: function () {\r\n            var self = this,\r\n                newDocHeight = self.getHeight(self.doc);\r\n\r\n            if (self.cache.documentHeight != newDocHeight) {\r\n                self.cache.documentHeight = newDocHeight;\r\n                self.recalc();\r\n            }\r\n\r\n            var scrollTop = self.window.scrollY,\r\n                shouldStick = self.cache.wrapperOffsetTop < scrollTop,\r\n                deltaScrollTop = scrollTop - self.cache.previousScrollTop,\r\n                isScrollingDown = deltaScrollTop > 0,\r\n                isScrollEnd = scrollTop >= (self.cache.documentHeight - self.cache.windowHeight);\r\n\r\n            if (isScrollingDown != self.cache.previousScrollingDown) {\r\n                self.cache.lastDirectionChangePosition = scrollTop;\r\n            }\r\n\r\n            if (shouldStick && !self.isSticky) {\r\n                self.el.classList.add(self.options.stickyActiveClass);\r\n                self.isSticky = true;\r\n            } else if (!shouldStick && self.isSticky) {\r\n                self.el.classList.remove(self.options.stickyActiveClass);\r\n                self.isSticky = false;\r\n            }\r\n\r\n            if (self.options.autoHide) {\r\n                var shouldAutoHide = self.cache.autoHideOffsetTop < scrollTop && !isScrollEnd;\r\n                var deltaScrollChangePos = Math.abs(scrollTop - self.cache.lastDirectionChangePosition);\r\n\r\n                if (isScrollingDown && shouldAutoHide && !self.forceShow) {\r\n                    self.el.classList.add(self.options.stickyHiddenClass);\r\n                } else if (deltaScrollChangePos >= self.options.autoShowOffset || !shouldAutoHide || self.forceShow) {\r\n                    self.el.classList.remove(self.options.stickyHiddenClass);\r\n                    self.forceShow = false;\r\n                }\r\n            }\r\n\r\n            if (self.options.innerScrolling) {\r\n                var needsInnerScrolling = self.cache.elementHeight > self.cache.windowHeight;\r\n\r\n                if (needsInnerScrolling && self.isSticky) {\r\n                    self.offset -= deltaScrollTop;\r\n                    self.offset = Math.max(self.offset, (self.cache.windowHeight - self.cache.elementHeight));\r\n                    self.offset = Math.min(self.offset, 0);\r\n\r\n                    self.el.style.top = self.offset + 'px';\r\n                }\r\n            }\r\n\r\n            if (self.options.contained) {\r\n                var hasReachedEnd = (self.cache.containerEndOffsetTop - self.cache.offsetTop - self.offset) < scrollTop;\r\n\r\n                if (hasReachedEnd) {\r\n                    self.el.classList.add(self.options.stickyBottomClass);\r\n                } else {\r\n                    self.el.classList.remove(self.options.stickyBottomClass);\r\n                }\r\n            }\r\n\r\n            self.cache.previousScrollTop = scrollTop;\r\n            self.cache.previousScrollingDown = isScrollingDown;\r\n        },\r\n\r\n        /*\r\n         * To show an auto-hidden sticky element, \r\n         * trigger the \"show\" event on the module element.\r\n         */\r\n        show: function () {\r\n            var self = this;\r\n\r\n            self.forceShow = true;\r\n            self.tick();\r\n        },\r\n\r\n        enable: function () {\r\n            var self = this;\r\n\r\n            if (self.isDisabled) {\r\n                self.isDisabled = false;\r\n\r\n                window.addEventListener('scroll', self.listener);\r\n                self.recalc();\r\n                self.tick();\r\n            }\r\n        },\r\n\r\n        disable: function () {\r\n            var self = this;\r\n\r\n            if (!self.isDisabled) {\r\n                self.isDisabled = true;\r\n                self.isSticky = false;\r\n                self.offset = 0;\r\n                self.el.style.top = '';\r\n                self.el.style.width = '';\r\n                self.el.classList.remove(self.options.stickyActiveClass);\r\n                self.el.classList.remove(self.options.stickyBottomClass);\r\n                self.el.classList.remove(self.options.stickyHiddenClass);\r\n                self.wrapper.style.height = '';\r\n\r\n                window.removeEventListener('scroll', self.listener);\r\n            }\r\n        },\r\n\r\n        getHeight: function (elem) {\r\n            if (elem == document) {\r\n                var body = elem.body,\r\n                    html = elem.documentElement;\r\n\r\n                return Math.max(body.scrollHeight, body.offsetHeight,\r\n                    html.clientHeight, html.scrollHeight, html.offsetHeight);\r\n            }\r\n\r\n            if (elem == window) {\r\n                return elem.outerHeight;\r\n            }\r\n\r\n            return elem.getBoundingClientRect().height;\r\n        },\r\n\r\n        getWidth: function (elem) {\r\n            if (elem == document) {\r\n                return elem.documentElement.getBoundingClientRect().width;\r\n            }\r\n\r\n            if (elem == window) {\r\n                return elem.outerWidth;\r\n            }\r\n\r\n            return elem.getBoundingClientRect().width;\r\n        }\r\n    });\r\n});"]}