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diff --git a/vendor/twbs/bootstrap/js/src/scrollspy.js b/vendor/twbs/bootstrap/js/src/scrollspy.js
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+++ b/vendor/twbs/bootstrap/js/src/scrollspy.js
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+import $ from 'jquery'
+import Util from './util'
+
+/**
+ * --------------------------------------------------------------------------
+ * Bootstrap (v4.1.3): scrollspy.js
+ * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
+ * --------------------------------------------------------------------------
+ */
+
+const ScrollSpy = (($) => {
+ /**
+ * ------------------------------------------------------------------------
+ * Constants
+ * ------------------------------------------------------------------------
+ */
+
+ const NAME = 'scrollspy'
+ const VERSION = '4.1.3'
+ const DATA_KEY = 'bs.scrollspy'
+ const EVENT_KEY = `.${DATA_KEY}`
+ const DATA_API_KEY = '.data-api'
+ const JQUERY_NO_CONFLICT = $.fn[NAME]
+
+ const Default = {
+ offset : 10,
+ method : 'auto',
+ target : ''
+ }
+
+ const DefaultType = {
+ offset : 'number',
+ method : 'string',
+ target : '(string|element)'
+ }
+
+ const Event = {
+ ACTIVATE : `activate${EVENT_KEY}`,
+ SCROLL : `scroll${EVENT_KEY}`,
+ LOAD_DATA_API : `load${EVENT_KEY}${DATA_API_KEY}`
+ }
+
+ const ClassName = {
+ DROPDOWN_ITEM : 'dropdown-item',
+ DROPDOWN_MENU : 'dropdown-menu',
+ ACTIVE : 'active'
+ }
+
+ const Selector = {
+ DATA_SPY : '[data-spy="scroll"]',
+ ACTIVE : '.active',
+ NAV_LIST_GROUP : '.nav, .list-group',
+ NAV_LINKS : '.nav-link',
+ NAV_ITEMS : '.nav-item',
+ LIST_ITEMS : '.list-group-item',
+ DROPDOWN : '.dropdown',
+ DROPDOWN_ITEMS : '.dropdown-item',
+ DROPDOWN_TOGGLE : '.dropdown-toggle'
+ }
+
+ const OffsetMethod = {
+ OFFSET : 'offset',
+ POSITION : 'position'
+ }
+
+ /**
+ * ------------------------------------------------------------------------
+ * Class Definition
+ * ------------------------------------------------------------------------
+ */
+
+ class ScrollSpy {
+ constructor(element, config) {
+ this._element = element
+ this._scrollElement = element.tagName === 'BODY' ? window : element
+ this._config = this._getConfig(config)
+ this._selector = `${this._config.target} ${Selector.NAV_LINKS},` +
+ `${this._config.target} ${Selector.LIST_ITEMS},` +
+ `${this._config.target} ${Selector.DROPDOWN_ITEMS}`
+ this._offsets = []
+ this._targets = []
+ this._activeTarget = null
+ this._scrollHeight = 0
+
+ $(this._scrollElement).on(Event.SCROLL, (event) => this._process(event))
+
+ this.refresh()
+ this._process()
+ }
+
+ // Getters
+
+ static get VERSION() {
+ return VERSION
+ }
+
+ static get Default() {
+ return Default
+ }
+
+ // Public
+
+ refresh() {
+ const autoMethod = this._scrollElement === this._scrollElement.window
+ ? OffsetMethod.OFFSET : OffsetMethod.POSITION
+
+ const offsetMethod = this._config.method === 'auto'
+ ? autoMethod : this._config.method
+
+ const offsetBase = offsetMethod === OffsetMethod.POSITION
+ ? this._getScrollTop() : 0
+
+ this._offsets = []
+ this._targets = []
+
+ this._scrollHeight = this._getScrollHeight()
+
+ const targets = [].slice.call(document.querySelectorAll(this._selector))
+
+ targets
+ .map((element) => {
+ let target
+ const targetSelector = Util.getSelectorFromElement(element)
+
+ if (targetSelector) {
+ target = document.querySelector(targetSelector)
+ }
+
+ if (target) {
+ const targetBCR = target.getBoundingClientRect()
+ if (targetBCR.width || targetBCR.height) {
+ // TODO (fat): remove sketch reliance on jQuery position/offset
+ return [
+ $(target)[offsetMethod]().top + offsetBase,
+ targetSelector
+ ]
+ }
+ }
+ return null
+ })
+ .filter((item) => item)
+ .sort((a, b) => a[0] - b[0])
+ .forEach((item) => {
+ this._offsets.push(item[0])
+ this._targets.push(item[1])
+ })
+ }
+
+ dispose() {
+ $.removeData(this._element, DATA_KEY)
+ $(this._scrollElement).off(EVENT_KEY)
+
+ this._element = null
+ this._scrollElement = null
+ this._config = null
+ this._selector = null
+ this._offsets = null
+ this._targets = null
+ this._activeTarget = null
+ this._scrollHeight = null
+ }
+
+ // Private
+
+ _getConfig(config) {
+ config = {
+ ...Default,
+ ...typeof config === 'object' && config ? config : {}
+ }
+
+ if (typeof config.target !== 'string') {
+ let id = $(config.target).attr('id')
+ if (!id) {
+ id = Util.getUID(NAME)
+ $(config.target).attr('id', id)
+ }
+ config.target = `#${id}`
+ }
+
+ Util.typeCheckConfig(NAME, config, DefaultType)
+
+ return config
+ }
+
+ _getScrollTop() {
+ return this._scrollElement === window
+ ? this._scrollElement.pageYOffset : this._scrollElement.scrollTop
+ }
+
+ _getScrollHeight() {
+ return this._scrollElement.scrollHeight || Math.max(
+ document.body.scrollHeight,
+ document.documentElement.scrollHeight
+ )
+ }
+
+ _getOffsetHeight() {
+ return this._scrollElement === window
+ ? window.innerHeight : this._scrollElement.getBoundingClientRect().height
+ }
+
+ _process() {
+ const scrollTop = this._getScrollTop() + this._config.offset
+ const scrollHeight = this._getScrollHeight()
+ const maxScroll = this._config.offset +
+ scrollHeight -
+ this._getOffsetHeight()
+
+ if (this._scrollHeight !== scrollHeight) {
+ this.refresh()
+ }
+
+ if (scrollTop >= maxScroll) {
+ const target = this._targets[this._targets.length - 1]
+
+ if (this._activeTarget !== target) {
+ this._activate(target)
+ }
+ return
+ }
+
+ if (this._activeTarget && scrollTop < this._offsets[0] && this._offsets[0] > 0) {
+ this._activeTarget = null
+ this._clear()
+ return
+ }
+
+ const offsetLength = this._offsets.length
+ for (let i = offsetLength; i--;) {
+ const isActiveTarget = this._activeTarget !== this._targets[i] &&
+ scrollTop >= this._offsets[i] &&
+ (typeof this._offsets[i + 1] === 'undefined' ||
+ scrollTop < this._offsets[i + 1])
+
+ if (isActiveTarget) {
+ this._activate(this._targets[i])
+ }
+ }
+ }
+
+ _activate(target) {
+ this._activeTarget = target
+
+ this._clear()
+
+ let queries = this._selector.split(',')
+ // eslint-disable-next-line arrow-body-style
+ queries = queries.map((selector) => {
+ return `${selector}[data-target="${target}"],` +
+ `${selector}[href="${target}"]`
+ })
+
+ const $link = $([].slice.call(document.querySelectorAll(queries.join(','))))
+
+ if ($link.hasClass(ClassName.DROPDOWN_ITEM)) {
+ $link.closest(Selector.DROPDOWN).find(Selector.DROPDOWN_TOGGLE).addClass(ClassName.ACTIVE)
+ $link.addClass(ClassName.ACTIVE)
+ } else {
+ // Set triggered link as active
+ $link.addClass(ClassName.ACTIVE)
+ // Set triggered links parents as active
+ // With both <ul> and <nav> markup a parent is the previous sibling of any nav ancestor
+ $link.parents(Selector.NAV_LIST_GROUP).prev(`${Selector.NAV_LINKS}, ${Selector.LIST_ITEMS}`).addClass(ClassName.ACTIVE)
+ // Handle special case when .nav-link is inside .nav-item
+ $link.parents(Selector.NAV_LIST_GROUP).prev(Selector.NAV_ITEMS).children(Selector.NAV_LINKS).addClass(ClassName.ACTIVE)
+ }
+
+ $(this._scrollElement).trigger(Event.ACTIVATE, {
+ relatedTarget: target
+ })
+ }
+
+ _clear() {
+ const nodes = [].slice.call(document.querySelectorAll(this._selector))
+ $(nodes).filter(Selector.ACTIVE).removeClass(ClassName.ACTIVE)
+ }
+
+ // Static
+
+ static _jQueryInterface(config) {
+ return this.each(function () {
+ let data = $(this).data(DATA_KEY)
+ const _config = typeof config === 'object' && config
+
+ if (!data) {
+ data = new ScrollSpy(this, _config)
+ $(this).data(DATA_KEY, data)
+ }
+
+ if (typeof config === 'string') {
+ if (typeof data[config] === 'undefined') {
+ throw new TypeError(`No method named "${config}"`)
+ }
+ data[config]()
+ }
+ })
+ }
+ }
+
+ /**
+ * ------------------------------------------------------------------------
+ * Data Api implementation
+ * ------------------------------------------------------------------------
+ */
+
+ $(window).on(Event.LOAD_DATA_API, () => {
+ const scrollSpys = [].slice.call(document.querySelectorAll(Selector.DATA_SPY))
+
+ const scrollSpysLength = scrollSpys.length
+ for (let i = scrollSpysLength; i--;) {
+ const $spy = $(scrollSpys[i])
+ ScrollSpy._jQueryInterface.call($spy, $spy.data())
+ }
+ })
+
+ /**
+ * ------------------------------------------------------------------------
+ * jQuery
+ * ------------------------------------------------------------------------
+ */
+
+ $.fn[NAME] = ScrollSpy._jQueryInterface
+ $.fn[NAME].Constructor = ScrollSpy
+ $.fn[NAME].noConflict = function () {
+ $.fn[NAME] = JQUERY_NO_CONFLICT
+ return ScrollSpy._jQueryInterface
+ }
+
+ return ScrollSpy
+})($)
+
+export default ScrollSpy