(function (global, factory) { if (typeof define === 'function' && define.amd) { define(['exports', 'module', './util'], factory); } else if (typeof exports !== 'undefined' && typeof module !== 'undefined') { factory(exports, module, require('./util')); } else { var mod = { exports: {} }; factory(mod.exports, mod, global.Util); global.scrollspy = mod.exports; } })(this, function (exports, module, _util) { 'use strict'; 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; }; })(); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; } function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } } var _Util = _interopRequireDefault(_util); /** * -------------------------------------------------------------------------- * Bootstrap (v4.0.0-alpha.2): scrollspy.js * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE) * -------------------------------------------------------------------------- */ var ScrollSpy = (function ($) { /** * ------------------------------------------------------------------------ * Constants * ------------------------------------------------------------------------ */ var NAME = 'scrollspy'; var VERSION = '4.0.0-alpha.2'; var DATA_KEY = 'bs.scrollspy'; var EVENT_KEY = '.' + DATA_KEY; var DATA_API_KEY = '.data-api'; var JQUERY_NO_CONFLICT = $.fn[NAME]; var Default = { offset: 10, method: 'auto', target: '' }; var DefaultType = { offset: 'number', method: 'string', target: '(string|element)' }; var Event = { ACTIVATE: 'activate' + EVENT_KEY, SCROLL: 'scroll' + EVENT_KEY, LOAD_DATA_API: 'load' + EVENT_KEY + DATA_API_KEY }; var ClassName = { DROPDOWN_ITEM: 'dropdown-item', DROPDOWN_MENU: 'dropdown-menu', NAV_LINK: 'nav-link', NAV: 'nav', ACTIVE: 'active' }; var Selector = { DATA_SPY: '[data-spy="scroll"]', ACTIVE: '.active', LIST_ITEM: '.list-item', LI: 'li', LI_DROPDOWN: 'li.dropdown', NAV_LINKS: '.nav-link', DROPDOWN: '.dropdown', DROPDOWN_ITEMS: '.dropdown-item', DROPDOWN_TOGGLE: '.dropdown-toggle' }; var OffsetMethod = { OFFSET: 'offset', POSITION: 'position' }; /** * ------------------------------------------------------------------------ * Class Definition * ------------------------------------------------------------------------ */ var ScrollSpy = (function () { function ScrollSpy(element, config) { _classCallCheck(this, ScrollSpy); 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.DROPDOWN_ITEMS); this._offsets = []; this._targets = []; this._activeTarget = null; this._scrollHeight = 0; $(this._scrollElement).on(Event.SCROLL, $.proxy(this._process, this)); this.refresh(); this._process(); } /** * ------------------------------------------------------------------------ * Data Api implementation * ------------------------------------------------------------------------ */ // getters _createClass(ScrollSpy, [{ key: 'refresh', // public value: function refresh() { var _this = this; var autoMethod = this._scrollElement !== this._scrollElement.window ? OffsetMethod.POSITION : OffsetMethod.OFFSET; var offsetMethod = this._config.method === 'auto' ? autoMethod : this._config.method; var offsetBase = offsetMethod === OffsetMethod.POSITION ? this._getScrollTop() : 0; this._offsets = []; this._targets = []; this._scrollHeight = this._getScrollHeight(); var targets = $.makeArray($(this._selector)); targets.map(function (element) { var target = undefined; var targetSelector = _Util['default'].getSelectorFromElement(element); if (targetSelector) { target = $(targetSelector)[0]; } if (target && (target.offsetWidth || target.offsetHeight)) { // todo (fat): remove sketch reliance on jQuery position/offset return [$(target)[offsetMethod]().top + offsetBase, targetSelector]; } }).filter(function (item) { return item; }).sort(function (a, b) { return a[0] - b[0]; }).forEach(function (item) { _this._offsets.push(item[0]); _this._targets.push(item[1]); }); } }, { key: 'dispose', value: function 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 }, { key: '_getConfig', value: function _getConfig(config) { config = $.extend({}, Default, config); if (typeof config.target !== 'string') { var id = $(config.target).attr('id'); if (!id) { id = _Util['default'].getUID(NAME); $(config.target).attr('id', id); } config.target = '#' + id; } _Util['default'].typeCheckConfig(NAME, config, DefaultType); return config; } }, { key: '_getScrollTop', value: function _getScrollTop() { return this._scrollElement === window ? this._scrollElement.scrollY : this._scrollElement.scrollTop; } }, { key: '_getScrollHeight', value: function _getScrollHeight() { return this._scrollElement.scrollHeight || Math.max(document.body.scrollHeight, document.documentElement.scrollHeight); } }, { key: '_process', value: function _process() { var scrollTop = this._getScrollTop() + this._config.offset; var scrollHeight = this._getScrollHeight(); var maxScroll = this._config.offset + scrollHeight - this._scrollElement.offsetHeight; if (this._scrollHeight !== scrollHeight) { this.refresh(); } if (scrollTop >= maxScroll) { var target = this._targets[this._targets.length - 1]; if (this._activeTarget !== target) { this._activate(target); } } if (this._activeTarget && scrollTop < this._offsets[0]) { this._activeTarget = null; this._clear(); return; } for (var i = this._offsets.length; i--;) { var isActiveTarget = this._activeTarget !== this._targets[i] && scrollTop >= this._offsets[i] && (this._offsets[i + 1] === undefined || scrollTop < this._offsets[i + 1]); if (isActiveTarget) { this._activate(this._targets[i]); } } } }, { key: '_activate', value: function _activate(target) { this._activeTarget = target; this._clear(); var queries = this._selector.split(','); queries = queries.map(function (selector) { return selector + '[data-target="' + target + '"],' + (selector + '[href="' + target + '"]'); }); var $link = $(queries.join(',')); if ($link.hasClass(ClassName.DROPDOWN_ITEM)) { $link.closest(Selector.DROPDOWN).find(Selector.DROPDOWN_TOGGLE).addClass(ClassName.ACTIVE); $link.addClass(ClassName.ACTIVE); } else { // todo (fat) this is kinda sus… // recursively add actives to tested nav-links $link.parents(Selector.LI).find(Selector.NAV_LINKS).addClass(ClassName.ACTIVE); } $(this._scrollElement).trigger(Event.ACTIVATE, { relatedTarget: target }); } }, { key: '_clear', value: function _clear() { $(this._selector).filter(Selector.ACTIVE).removeClass(ClassName.ACTIVE); } // static }], [{ key: '_jQueryInterface', value: function _jQueryInterface(config) { return this.each(function () { var data = $(this).data(DATA_KEY); var _config = typeof config === 'object' && config || null; if (!data) { data = new ScrollSpy(this, _config); $(this).data(DATA_KEY, data); } if (typeof config === 'string') { if (data[config] === undefined) { throw new Error('No method named "' + config + '"'); } data[config](); } }); } }, { key: 'VERSION', get: function get() { return VERSION; } }, { key: 'Default', get: function get() { return Default; } }]); return ScrollSpy; })(); $(window).on(Event.LOAD_DATA_API, function () { var scrollSpys = $.makeArray($(Selector.DATA_SPY)); for (var i = scrollSpys.length; i--;) { var $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; })(jQuery); module.exports = ScrollSpy; });