(function (global, factory) {
	typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
		typeof define === 'function' && define.amd ? define(['exports'], factory) :
			(factory((global.StickySidebar = {})));
}(this, (function (exports) { 'use strict';

	var commonjsGlobal = typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};



	function unwrapExports (x) {
		return x && x.__esModule && Object.prototype.hasOwnProperty.call(x, 'default') ? x['default'] : x;
	}

	function createCommonjsModule(fn, module) {
		return module = { exports: {} }, fn(module, module.exports), module.exports;
	}

	var stickySidebar = createCommonjsModule(function (module, exports) {
		(function (global, factory) {
			if (typeof undefined === "function" && undefined.amd) {
				undefined(['exports'], factory);
			} else {
				factory(exports);
			}
		})(commonjsGlobal, function (exports) {
			Object.defineProperty(exports, "__esModule", {
				value: true
			});

			function _classCallCheck(instance, Constructor) {
				if (!(instance instanceof Constructor)) {
					throw new TypeError("Cannot call a class as a function");
				}
			}

			var _createClass = function () {
				function defineProperties(target, props) {
					for (var i = 0; i < props.length; i++) {
						var descriptor = props[i];
						descriptor.enumerable = descriptor.enumerable || false;
						descriptor.configurable = true;
						if ("value" in descriptor) descriptor.writable = true;
						Object.defineProperty(target, descriptor.key, descriptor);
					}
				}

				return function (Constructor, protoProps, staticProps) {
					if (protoProps) defineProperties(Constructor.prototype, protoProps);
					if (staticProps) defineProperties(Constructor, staticProps);
					return Constructor;
				};
			}();

			/**
			 * Sticky Sidebar JavaScript Plugin.
			 * @version 3.3.4
			 * @author Ahmed Bouhuolia <a.bouhuolia@gmail.com>
			 * @license The MIT License (MIT)
			 */
			var StickySidebar = function () {

				// ---------------------------------
				// # Define Constants
				// ---------------------------------
				//
				var EVENT_KEY = '.stickySidebar';
				var DEFAULTS = {
					/**
					 * Additional top spacing of the element when it becomes sticky.
					 * @type {Numeric|Function}
					 */
					topSpacing: 0,

					/**
					 * Additional bottom spacing of the element when it becomes sticky.
					 * @type {Numeric|Function}
					 */
					bottomSpacing: 0,

					/**
					 * Container sidebar selector to know what the beginning and end of sticky element.
					 * @type {String|False}
					 */
					containerSelector: false,

					/**
					 * Inner wrapper selector.
					 * @type {String}
					 */
					innerWrapperSelector: '.inner-wrapper-sticky',

					/**
					 * The name of CSS class to apply to elements when they have become stuck.
					 * @type {String|False}
					 */
					stickyClass: 'is-affixed',

					/**
					 * Detect when sidebar and its container change height so re-calculate their dimensions.
					 * @type {Boolean}
					 */
					resizeSensor: true,

					/**
					 * The sidebar returns to its normal position if its width below this value.
					 * @type {Numeric}
					 */
					minWidth: false
				};

				// ---------------------------------
				// # Class Definition
				// ---------------------------------
				//
				/**
				 * Sticky Sidebar Class.
				 * @public
				 */

				var StickySidebar = function () {

					/**
					 * Sticky Sidebar Constructor.
					 * @constructor
					 * @param {HTMLElement|String} sidebar - The sidebar element or sidebar selector.
					 * @param {Object} options - The options of sticky sidebar.
					 */
					function StickySidebar(sidebar) {
						var _this = this;

						var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};

						_classCallCheck(this, StickySidebar);

						this.options = StickySidebar.extend(DEFAULTS, options);

						// Sidebar element query if there's no one, throw error.
						this.sidebar = 'string' === typeof sidebar ? document.querySelector(sidebar) : sidebar;
						if ('undefined' === typeof this.sidebar) throw new Error("There is no specific sidebar element.");

						this.sidebarInner = false;
						this.container = this.sidebar.parentElement;

						// Current Affix Type of sidebar element.
						this.affixedType = 'STATIC';
						this.direction = 'down';
						this.support = {
							transform: false,
							transform3d: false
						};

						this._initialized = false;
						this._reStyle = false;
						this._breakpoint = false;

						// Dimensions of sidebar, container and screen viewport.
						this.dimensions = {
							translateY: 0,
							maxTranslateY: 0,
							topSpacing: 0,
							lastTopSpacing: 0,
							bottomSpacing: 0,
							lastBottomSpacing: 0,
							sidebarHeight: 0,
							sidebarWidth: 0,
							containerTop: 0,
							containerHeight: 0,
							viewportHeight: 0,
							viewportTop: 0,
							lastViewportTop: 0
						};

						// Bind event handlers for referencability.
						['handleEvent'].forEach(function (method) {
							_this[method] = _this[method].bind(_this);
						});

						// Initialize sticky sidebar for first time.
						this.initialize();
					}

					/**
					 * Initializes the sticky sidebar by adding inner wrapper, define its container,
					 * min-width breakpoint, calculating dimensions, adding helper classes and inline style.
					 * @private
					 */


					_createClass(StickySidebar, [{
						key: 'initialize',
						value: function initialize() {
							var _this2 = this;

							this._setSupportFeatures();

							// Get sticky sidebar inner wrapper, if not found, will create one.
							if (this.options.innerWrapperSelector) {
								this.sidebarInner = this.sidebar.querySelector(this.options.innerWrapperSelector);

								if (null === this.sidebarInner) this.sidebarInner = false;
							}

							if (!this.sidebarInner) {
								var wrapper = document.createElement('div');
								wrapper.setAttribute('class', 'inner-wrapper-sticky');
								this.sidebar.appendChild(wrapper);

								while (this.sidebar.firstChild != wrapper) {
									wrapper.appendChild(this.sidebar.firstChild);
								}this.sidebarInner = this.sidebar.querySelector('.inner-wrapper-sticky');
							}

							// Container wrapper of the sidebar.
							if (this.options.containerSelector) {
								var containers = document.querySelectorAll(this.options.containerSelector);
								containers = Array.prototype.slice.call(containers);

								containers.forEach(function (container, item) {
									if (!container.contains(_this2.sidebar)) return;
									_this2.container = container;
								});

								if (!containers.length) throw new Error("The container does not contains on the sidebar.");
							}

							// If top/bottom spacing is not function parse value to integer.
							if ('function' !== typeof this.options.topSpacing) this.options.topSpacing = parseInt(this.options.topSpacing) || 0;

							if ('function' !== typeof this.options.bottomSpacing) this.options.bottomSpacing = parseInt(this.options.bottomSpacing) || 0;

							// Breakdown sticky sidebar if screen width below `options.minWidth`.
							this._widthBreakpoint();

							// Calculate dimensions of sidebar, container and viewport.
							this.calcDimensions();

							// Affix sidebar in proper position.
							this.stickyPosition();

							// Bind all events.
							this.bindEvents();

							// Inform other properties the sticky sidebar is initialized.
							this._initialized = true;
						}
					}, {
						key: 'bindEvents',
						value: function bindEvents() {
							window.addEventListener('resize', this, { passive: true, capture: false });
							window.addEventListener('scroll', this, { passive: true, capture: false });

							this.sidebar.addEventListener('update' + EVENT_KEY, this);

							if (this.options.resizeSensor && 'undefined' !== typeof ResizeSensor) {
								new ResizeSensor(this.sidebarInner, this.handleEvent);
								new ResizeSensor(this.container, this.handleEvent);
							}
						}
					}, {
						key: 'handleEvent',
						value: function handleEvent(event) {
							this.updateSticky(event);
						}
					}, {
						key: 'calcDimensions',
						value: function calcDimensions() {
							if (this._breakpoint) return;
							var dims = this.dimensions;

							// Container of sticky sidebar dimensions.
							dims.containerTop = StickySidebar.offsetRelative(this.container).top;
							dims.containerHeight = this.container.clientHeight;
							dims.containerBottom = dims.containerTop + dims.containerHeight;

							// Sidebar dimensions.
							dims.sidebarHeight = this.sidebarInner.offsetHeight;
							dims.sidebarWidth = this.sidebarInner.offsetWidth;

							// Screen viewport dimensions.
							dims.viewportHeight = window.innerHeight;

							// Maximum sidebar translate Y.
							dims.maxTranslateY = dims.containerHeight - dims.sidebarHeight;

							this._calcDimensionsWithScroll();
						}
					}, {
						key: '_calcDimensionsWithScroll',
						value: function _calcDimensionsWithScroll() {
							var dims = this.dimensions;

							dims.sidebarLeft = StickySidebar.offsetRelative(this.sidebar).left;

							dims.viewportTop = document.documentElement.scrollTop || document.body.scrollTop;
							dims.viewportBottom = dims.viewportTop + dims.viewportHeight;
							dims.viewportLeft = document.documentElement.scrollLeft || document.body.scrollLeft;

							dims.topSpacing = this.options.topSpacing;
							dims.bottomSpacing = this.options.bottomSpacing;

							if ('function' === typeof dims.topSpacing) dims.topSpacing = parseInt(dims.topSpacing(this.sidebar)) || 0;

							if ('function' === typeof dims.bottomSpacing) dims.bottomSpacing = parseInt(dims.bottomSpacing(this.sidebar)) || 0;

							if ('VIEWPORT-TOP' === this.affixedType) {
								// Adjust translate Y in the case decrease top spacing value.
								if (dims.topSpacing < dims.lastTopSpacing) {
									dims.translateY += dims.lastTopSpacing - dims.topSpacing;
									this._reStyle = true;
								}
							} else if ('VIEWPORT-BOTTOM' === this.affixedType) {
								// Adjust translate Y in the case decrease bottom spacing value.
								if (dims.bottomSpacing < dims.lastBottomSpacing) {
									dims.translateY += dims.lastBottomSpacing - dims.bottomSpacing;
									this._reStyle = true;
								}
							}

							dims.lastTopSpacing = dims.topSpacing;
							dims.lastBottomSpacing = dims.bottomSpacing;
						}
					}, {
						key: 'isSidebarFitsViewport',
						value: function isSidebarFitsViewport() {
							var dims = this.dimensions;
							var offset = this.scrollDirection === 'down' ? dims.lastBottomSpacing : dims.lastTopSpacing;
							return this.dimensions.sidebarHeight + offset < this.dimensions.viewportHeight;
						}
					}, {
						key: 'observeScrollDir',
						value: function observeScrollDir() {
							var dims = this.dimensions;
							if (dims.lastViewportTop === dims.viewportTop) return;

							var furthest = 'down' === this.direction ? Math.min : Math.max;

							// If the browser is scrolling not in the same direction.
							if (dims.viewportTop === furthest(dims.viewportTop, dims.lastViewportTop)) this.direction = 'down' === this.direction ? 'up' : 'down';
						}
					}, {
						key: 'getAffixType',
						value: function getAffixType() {
							this._calcDimensionsWithScroll();
							var dims = this.dimensions;
							var colliderTop = dims.viewportTop + dims.topSpacing;
							var affixType = this.affixedType;

							if (colliderTop <= dims.containerTop || dims.containerHeight <= dims.sidebarHeight) {
								dims.translateY = 0;
								affixType = 'STATIC';
							} else {
								affixType = 'up' === this.direction ? this._getAffixTypeScrollingUp() : this._getAffixTypeScrollingDown();
							}

							// Make sure the translate Y is not bigger than container height.
							dims.translateY = Math.max(0, dims.translateY);
							dims.translateY = Math.min(dims.containerHeight, dims.translateY);
							dims.translateY = Math.round(dims.translateY);

							dims.lastViewportTop = dims.viewportTop;
							return affixType;
						}
					}, {
						key: '_getAffixTypeScrollingDown',
						value: function _getAffixTypeScrollingDown() {
							var dims = this.dimensions;
							var sidebarBottom = dims.sidebarHeight + dims.containerTop;
							var colliderTop = dims.viewportTop + dims.topSpacing;
							var colliderBottom = dims.viewportBottom - dims.bottomSpacing;
							var affixType = this.affixedType;

							if (this.isSidebarFitsViewport()) {
								if (dims.sidebarHeight + colliderTop >= dims.containerBottom) {
									dims.translateY = dims.containerBottom - sidebarBottom;
									affixType = 'CONTAINER-BOTTOM';
								} else if (colliderTop >= dims.containerTop) {
									dims.translateY = colliderTop - dims.containerTop;
									affixType = 'VIEWPORT-TOP';
								}
							} else {
								if (dims.containerBottom <= colliderBottom) {
									dims.translateY = dims.containerBottom - sidebarBottom;
									affixType = 'CONTAINER-BOTTOM';
								} else if (sidebarBottom + dims.translateY <= colliderBottom) {
									dims.translateY = colliderBottom - sidebarBottom;
									affixType = 'VIEWPORT-BOTTOM';
								} else if (dims.containerTop + dims.translateY <= colliderTop && 0 !== dims.translateY && dims.maxTranslateY !== dims.translateY) {
									affixType = 'VIEWPORT-UNBOTTOM';
								}
							}

							return affixType;
						}
					}, {
						key: '_getAffixTypeScrollingUp',
						value: function _getAffixTypeScrollingUp() {
							var dims = this.dimensions;
							var sidebarBottom = dims.sidebarHeight + dims.containerTop;
							var colliderTop = dims.viewportTop + dims.topSpacing;
							var colliderBottom = dims.viewportBottom - dims.bottomSpacing;
							var affixType = this.affixedType;

							if (colliderTop <= dims.translateY + dims.containerTop) {
								dims.translateY = colliderTop - dims.containerTop;
								affixType = 'VIEWPORT-TOP';
							} else if (dims.containerBottom <= colliderBottom) {
								dims.translateY = dims.containerBottom - sidebarBottom;
								affixType = 'CONTAINER-BOTTOM';
							} else if (!this.isSidebarFitsViewport()) {

								if (dims.containerTop <= colliderTop && 0 !== dims.translateY && dims.maxTranslateY !== dims.translateY) {
									affixType = 'VIEWPORT-UNBOTTOM';
								}
							}

							return affixType;
						}
					}, {
						key: '_getStyle',
						value: function _getStyle(affixType) {
							if ('undefined' === typeof affixType) return;

							var style = { inner: {}, outer: {} };
							var dims = this.dimensions;

							switch (affixType) {
								case 'VIEWPORT-TOP':
									style.inner = { position: 'fixed', top: dims.topSpacing,
										left: dims.sidebarLeft - dims.viewportLeft, width: dims.sidebarWidth };
									break;
								case 'VIEWPORT-BOTTOM':
									style.inner = { position: 'fixed', top: 'auto', left: dims.sidebarLeft,
										bottom: dims.bottomSpacing, width: dims.sidebarWidth };
									break;
								case 'CONTAINER-BOTTOM':
								case 'VIEWPORT-UNBOTTOM':
									var translate = this._getTranslate(0, dims.translateY + 'px');

									if (translate) style.inner = { transform: translate };else style.inner = { position: 'absolute', top: dims.translateY, width: dims.sidebarWidth };
									break;
							}

							switch (affixType) {
								case 'VIEWPORT-TOP':
								case 'VIEWPORT-BOTTOM':
								case 'VIEWPORT-UNBOTTOM':
								case 'CONTAINER-BOTTOM':
									style.outer = { height: dims.sidebarHeight, position: 'relative' };
									break;
							}

							style.outer = StickySidebar.extend({ height: '', position: '' }, style.outer);
							style.inner = StickySidebar.extend({ position: 'relative', top: '', left: '',
								bottom: '', width: '', transform: '' }, style.inner);

							return style;
						}
					}, {
						key: 'stickyPosition',
						value: function stickyPosition(force) {
							if (this._breakpoint) return;

							force = this._reStyle || force || false;

							var offsetTop = this.options.topSpacing;
							var offsetBottom = this.options.bottomSpacing;

							var affixType = this.getAffixType();
							var style = this._getStyle(affixType);

							if ((this.affixedType != affixType || force) && affixType) {
								var affixEvent = 'affix.' + affixType.toLowerCase().replace('viewport-', '') + EVENT_KEY;
								StickySidebar.eventTrigger(this.sidebar, affixEvent);

								if ('STATIC' === affixType) StickySidebar.removeClass(this.sidebar, this.options.stickyClass);else StickySidebar.addClass(this.sidebar, this.options.stickyClass);

								for (var key in style.outer) {
									var unit = 'number' === typeof style.outer[key] ? 'px' : '';
									this.sidebar.style[key] = style.outer[key] + unit;
								}

								for (var _key in style.inner) {
									var _unit = 'number' === typeof style.inner[_key] ? 'px' : '';
									this.sidebarInner.style[_key] = style.inner[_key] + _unit;
								}

								var affixedEvent = 'affixed.' + affixType.toLowerCase().replace('viewport-', '') + EVENT_KEY;
								StickySidebar.eventTrigger(this.sidebar, affixedEvent);
							} else {
								if (this._initialized) this.sidebarInner.style.left = style.inner.left;
							}

							this.affixedType = affixType;
						}
					}, {
						key: '_widthBreakpoint',
						value: function _widthBreakpoint() {

							if (window.innerWidth <= this.options.minWidth) {
								this._breakpoint = true;
								this.affixedType = 'STATIC';

								this.sidebar.removeAttribute('style');
								StickySidebar.removeClass(this.sidebar, this.options.stickyClass);
								this.sidebarInner.removeAttribute('style');
							} else {
								this._breakpoint = false;
							}
						}
					}, {
						key: 'updateSticky',
						value: function updateSticky() {
							var _this3 = this;

							var event = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};

							if (this._running) return;
							this._running = true;

							(function (eventType) {
								requestAnimationFrame(function () {
									switch (eventType) {
										// When browser is scrolling and re-calculate just dimensions
										// within scroll.
										case 'scroll':
											_this3._calcDimensionsWithScroll();
											_this3.observeScrollDir();
											_this3.stickyPosition();
											break;

										// When browser is resizing or there's no event, observe width
										// breakpoint and re-calculate dimensions.
										case 'resize':
										default:
											_this3._widthBreakpoint();
											_this3.calcDimensions();
											_this3.stickyPosition(true);
											break;
									}
									_this3._running = false;
								});
							})(event.type);
						}
					}, {
						key: '_setSupportFeatures',
						value: function _setSupportFeatures() {
							var support = this.support;

							support.transform = StickySidebar.supportTransform();
							support.transform3d = StickySidebar.supportTransform(true);
						}
					}, {
						key: '_getTranslate',
						value: function _getTranslate() {
							var y = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 0;
							var x = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 0;
							var z = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 0;
							x = parseInt(x) - 20;
							x = x.toString() + 'px';

							if (this.support.transform3d) return 'translate3d(' + y + ', ' + x + ', ' + z + ')';else if (this.support.translate) return 'translate(' + y + ', ' + x + ')';else return false;
						}
					}, {
						key: 'destroy',
						value: function destroy() {
							window.removeEventListener('resize', this, { capture: false });
							window.removeEventListener('scroll', this, { capture: false });

							this.sidebar.classList.remove(this.options.stickyClass);
							this.sidebar.style.minHeight = '';

							this.sidebar.removeEventListener('update' + EVENT_KEY, this);

							var styleReset = { inner: {}, outer: {} };

							styleReset.inner = { position: '', top: '', left: '', bottom: '', width: '', transform: '' };
							styleReset.outer = { height: '', position: '' };

							for (var key in styleReset.outer) {
								this.sidebar.style[key] = styleReset.outer[key];
							}for (var _key2 in styleReset.inner) {
								this.sidebarInner.style[_key2] = styleReset.inner[_key2];
							}if (this.options.resizeSensor && 'undefined' !== typeof ResizeSensor) {
								ResizeSensor.detach(this.sidebarInner, this.handleEvent);
								ResizeSensor.detach(this.container, this.handleEvent);
							}
						}
					}], [{
						key: 'supportTransform',
						value: function supportTransform(transform3d) {
							var result = false,
								property = transform3d ? 'perspective' : 'transform',
								upper = property.charAt(0).toUpperCase() + property.slice(1),
								prefixes = ['Webkit', 'Moz', 'O', 'ms'],
								support = document.createElement('support'),
								style = support.style;

							(property + ' ' + prefixes.join(upper + ' ') + upper).split(' ').forEach(function (property, i) {
								if (style[property] !== undefined) {
									result = property;
									return false;
								}
							});
							return result;
						}
					}, {
						key: 'eventTrigger',
						value: function eventTrigger(element, eventName, data) {
							try {
								var event = new CustomEvent(eventName, { detail: data });
							} catch (e) {
								var event = document.createEvent('CustomEvent');
								event.initCustomEvent(eventName, true, true, data);
							}
							element.dispatchEvent(event);
						}
					}, {
						key: 'extend',
						value: function extend(defaults, options) {
							var results = {};
							for (var key in defaults) {
								if ('undefined' !== typeof options[key]) results[key] = options[key];else results[key] = defaults[key];
							}
							return results;
						}
					}, {
						key: 'offsetRelative',
						value: function offsetRelative(element) {
							var result = { left: 0, top: 0 };

							do {
								var offsetTop = element.offsetTop;
								var offsetLeft = element.offsetLeft;

								if (!isNaN(offsetTop)) result.top += offsetTop;

								if (!isNaN(offsetLeft)) result.left += offsetLeft;

								element = 'BODY' === element.tagName ? element.parentElement : element.offsetParent;
							} while (element);
							return result;
						}
					}, {
						key: 'addClass',
						value: function addClass(element, className) {
							if (!StickySidebar.hasClass(element, className)) {
								if (element.classList) element.classList.add(className);else element.className += ' ' + className;
							}
						}
					}, {
						key: 'removeClass',
						value: function removeClass(element, className) {
							if (StickySidebar.hasClass(element, className)) {
								if (element.classList) element.classList.remove(className);else element.className = element.className.replace(new RegExp('(^|\\b)' + className.split(' ').join('|') + '(\\b|$)', 'gi'), ' ');
							}
						}
					}, {
						key: 'hasClass',
						value: function hasClass(element, className) {
							if (element.classList) return element.classList.contains(className);else return new RegExp('(^| )' + className + '( |$)', 'gi').test(element.className);
						}
					}, {
						key: 'defaults',
						get: function () {
							return DEFAULTS;
						}
					}]);

					return StickySidebar;
				}();

				return StickySidebar;
			}();

			exports.default = StickySidebar;


			// Global
			// -------------------------
			window.StickySidebar = StickySidebar;
		});
	});

	var stickySidebar$1 = unwrapExports(stickySidebar);

	exports['default'] = stickySidebar$1;
	exports.__moduleExports = stickySidebar;

	Object.defineProperty(exports, '__esModule', { value: true });

})));
