mirror of
https://github.com/twbs/bootstrap.git
synced 2022-11-09 12:25:43 -05:00
410 lines
14 KiB
JavaScript
410 lines
14 KiB
JavaScript
/*!
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* Bootstrap scrollspy.js v5.0.2 (https://getbootstrap.com/)
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* Copyright 2011-2021 The Bootstrap Authors (https://github.com/twbs/bootstrap/graphs/contributors)
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* Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
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*/
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(function (global, factory) {
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typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory(require('./dom/selector-engine.js'), require('./dom/event-handler.js'), require('./dom/manipulator.js'), require('./base-component.js')) :
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typeof define === 'function' && define.amd ? define(['./dom/selector-engine', './dom/event-handler', './dom/manipulator', './base-component'], factory) :
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(global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.ScrollSpy = factory(global.SelectorEngine, global.EventHandler, global.Manipulator, global.Base));
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}(this, (function (SelectorEngine, EventHandler, Manipulator, BaseComponent) { 'use strict';
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function _interopDefaultLegacy (e) { return e && typeof e === 'object' && 'default' in e ? e : { 'default': e }; }
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var SelectorEngine__default = /*#__PURE__*/_interopDefaultLegacy(SelectorEngine);
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var EventHandler__default = /*#__PURE__*/_interopDefaultLegacy(EventHandler);
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var Manipulator__default = /*#__PURE__*/_interopDefaultLegacy(Manipulator);
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var BaseComponent__default = /*#__PURE__*/_interopDefaultLegacy(BaseComponent);
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/**
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* --------------------------------------------------------------------------
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* Bootstrap (v5.0.2): util/index.js
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* Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
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* --------------------------------------------------------------------------
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*/
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const MAX_UID = 1000000;
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const toType = obj => {
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if (obj === null || obj === undefined) {
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return `${obj}`;
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}
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return {}.toString.call(obj).match(/\s([a-z]+)/i)[1].toLowerCase();
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};
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/**
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* --------------------------------------------------------------------------
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* Public Util Api
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* --------------------------------------------------------------------------
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*/
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const getUID = prefix => {
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do {
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prefix += Math.floor(Math.random() * MAX_UID);
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} while (document.getElementById(prefix));
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return prefix;
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};
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const getSelector = element => {
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let selector = element.getAttribute('data-bs-target');
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if (!selector || selector === '#') {
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let hrefAttr = element.getAttribute('href'); // The only valid content that could double as a selector are IDs or classes,
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// so everything starting with `#` or `.`. If a "real" URL is used as the selector,
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// `document.querySelector` will rightfully complain it is invalid.
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// See https://github.com/twbs/bootstrap/issues/32273
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if (!hrefAttr || !hrefAttr.includes('#') && !hrefAttr.startsWith('.')) {
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return null;
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} // Just in case some CMS puts out a full URL with the anchor appended
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if (hrefAttr.includes('#') && !hrefAttr.startsWith('#')) {
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hrefAttr = `#${hrefAttr.split('#')[1]}`;
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}
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selector = hrefAttr && hrefAttr !== '#' ? hrefAttr.trim() : null;
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}
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return selector;
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};
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const getSelectorFromElement = element => {
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const selector = getSelector(element);
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if (selector) {
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return document.querySelector(selector) ? selector : null;
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}
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return null;
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};
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const isElement = obj => {
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if (!obj || typeof obj !== 'object') {
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return false;
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}
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if (typeof obj.jquery !== 'undefined') {
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obj = obj[0];
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}
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return typeof obj.nodeType !== 'undefined';
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};
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const typeCheckConfig = (componentName, config, configTypes) => {
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Object.keys(configTypes).forEach(property => {
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const expectedTypes = configTypes[property];
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const value = config[property];
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const valueType = value && isElement(value) ? 'element' : toType(value);
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if (!new RegExp(expectedTypes).test(valueType)) {
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throw new TypeError(`${componentName.toUpperCase()}: Option "${property}" provided type "${valueType}" but expected type "${expectedTypes}".`);
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}
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});
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};
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const getjQuery = () => {
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const {
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jQuery
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} = window;
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if (jQuery && !document.body.hasAttribute('data-bs-no-jquery')) {
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return jQuery;
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}
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return null;
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};
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const DOMContentLoadedCallbacks = [];
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const onDOMContentLoaded = callback => {
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if (document.readyState === 'loading') {
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// add listener on the first call when the document is in loading state
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if (!DOMContentLoadedCallbacks.length) {
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document.addEventListener('DOMContentLoaded', () => {
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DOMContentLoadedCallbacks.forEach(callback => callback());
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});
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}
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DOMContentLoadedCallbacks.push(callback);
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} else {
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callback();
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}
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};
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const defineJQueryPlugin = plugin => {
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onDOMContentLoaded(() => {
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const $ = getjQuery();
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/* istanbul ignore if */
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if ($) {
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const name = plugin.NAME;
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const JQUERY_NO_CONFLICT = $.fn[name];
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$.fn[name] = plugin.jQueryInterface;
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$.fn[name].Constructor = plugin;
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$.fn[name].noConflict = () => {
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$.fn[name] = JQUERY_NO_CONFLICT;
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return plugin.jQueryInterface;
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};
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}
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});
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};
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/**
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* --------------------------------------------------------------------------
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* Bootstrap (v5.0.2): scrollspy.js
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* Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
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* --------------------------------------------------------------------------
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*/
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/**
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* ------------------------------------------------------------------------
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* Constants
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* ------------------------------------------------------------------------
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*/
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const NAME = 'scrollspy';
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const DATA_KEY = 'bs.scrollspy';
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const EVENT_KEY = `.${DATA_KEY}`;
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const DATA_API_KEY = '.data-api';
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const Default = {
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offset: 10,
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method: 'auto',
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target: ''
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};
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const DefaultType = {
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offset: 'number',
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method: 'string',
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target: '(string|element)'
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};
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const EVENT_ACTIVATE = `activate${EVENT_KEY}`;
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const EVENT_SCROLL = `scroll${EVENT_KEY}`;
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const EVENT_LOAD_DATA_API = `load${EVENT_KEY}${DATA_API_KEY}`;
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const CLASS_NAME_DROPDOWN_ITEM = 'dropdown-item';
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const CLASS_NAME_ACTIVE = 'active';
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const SELECTOR_DATA_SPY = '[data-bs-spy="scroll"]';
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const SELECTOR_NAV_LIST_GROUP = '.nav, .list-group';
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const SELECTOR_NAV_LINKS = '.nav-link';
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const SELECTOR_NAV_ITEMS = '.nav-item';
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const SELECTOR_LIST_ITEMS = '.list-group-item';
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const SELECTOR_DROPDOWN = '.dropdown';
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const SELECTOR_DROPDOWN_TOGGLE = '.dropdown-toggle';
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const METHOD_OFFSET = 'offset';
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const METHOD_POSITION = 'position';
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/**
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* ------------------------------------------------------------------------
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* Class Definition
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* ------------------------------------------------------------------------
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*/
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class ScrollSpy extends BaseComponent__default['default'] {
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constructor(element, config) {
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super(element);
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this._scrollElement = this._element.tagName === 'BODY' ? window : this._element;
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this._config = this._getConfig(config);
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this._selector = `${this._config.target} ${SELECTOR_NAV_LINKS}, ${this._config.target} ${SELECTOR_LIST_ITEMS}, ${this._config.target} .${CLASS_NAME_DROPDOWN_ITEM}`;
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this._offsets = [];
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this._targets = [];
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this._activeTarget = null;
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this._scrollHeight = 0;
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EventHandler__default['default'].on(this._scrollElement, EVENT_SCROLL, () => this._process());
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this.refresh();
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this._process();
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} // Getters
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static get Default() {
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return Default;
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}
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static get NAME() {
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return NAME;
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} // Public
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refresh() {
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const autoMethod = this._scrollElement === this._scrollElement.window ? METHOD_OFFSET : METHOD_POSITION;
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const offsetMethod = this._config.method === 'auto' ? autoMethod : this._config.method;
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const offsetBase = offsetMethod === METHOD_POSITION ? this._getScrollTop() : 0;
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this._offsets = [];
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this._targets = [];
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this._scrollHeight = this._getScrollHeight();
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const targets = SelectorEngine__default['default'].find(this._selector);
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targets.map(element => {
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const targetSelector = getSelectorFromElement(element);
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const target = targetSelector ? SelectorEngine__default['default'].findOne(targetSelector) : null;
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if (target) {
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const targetBCR = target.getBoundingClientRect();
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if (targetBCR.width || targetBCR.height) {
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return [Manipulator__default['default'][offsetMethod](target).top + offsetBase, targetSelector];
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}
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}
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return null;
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}).filter(item => item).sort((a, b) => a[0] - b[0]).forEach(item => {
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this._offsets.push(item[0]);
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this._targets.push(item[1]);
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});
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}
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dispose() {
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EventHandler__default['default'].off(this._scrollElement, EVENT_KEY);
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super.dispose();
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} // Private
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_getConfig(config) {
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config = { ...Default,
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...Manipulator__default['default'].getDataAttributes(this._element),
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...(typeof config === 'object' && config ? config : {})
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};
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if (typeof config.target !== 'string' && isElement(config.target)) {
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let {
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id
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} = config.target;
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if (!id) {
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id = getUID(NAME);
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config.target.id = id;
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}
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config.target = `#${id}`;
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}
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typeCheckConfig(NAME, config, DefaultType);
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return config;
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}
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_getScrollTop() {
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return this._scrollElement === window ? this._scrollElement.pageYOffset : this._scrollElement.scrollTop;
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}
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_getScrollHeight() {
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return this._scrollElement.scrollHeight || Math.max(document.body.scrollHeight, document.documentElement.scrollHeight);
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}
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_getOffsetHeight() {
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return this._scrollElement === window ? window.innerHeight : this._scrollElement.getBoundingClientRect().height;
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}
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_process() {
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const scrollTop = this._getScrollTop() + this._config.offset;
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const scrollHeight = this._getScrollHeight();
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const maxScroll = this._config.offset + scrollHeight - this._getOffsetHeight();
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if (this._scrollHeight !== scrollHeight) {
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this.refresh();
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}
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if (scrollTop >= maxScroll) {
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const target = this._targets[this._targets.length - 1];
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if (this._activeTarget !== target) {
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this._activate(target);
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}
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return;
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}
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if (this._activeTarget && scrollTop < this._offsets[0] && this._offsets[0] > 0) {
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this._activeTarget = null;
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this._clear();
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return;
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}
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for (let i = this._offsets.length; i--;) {
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const isActiveTarget = this._activeTarget !== this._targets[i] && scrollTop >= this._offsets[i] && (typeof this._offsets[i + 1] === 'undefined' || scrollTop < this._offsets[i + 1]);
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if (isActiveTarget) {
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this._activate(this._targets[i]);
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}
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}
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}
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_activate(target) {
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this._activeTarget = target;
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this._clear();
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const queries = this._selector.split(',').map(selector => `${selector}[data-bs-target="${target}"],${selector}[href="${target}"]`);
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const link = SelectorEngine__default['default'].findOne(queries.join(','));
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if (link.classList.contains(CLASS_NAME_DROPDOWN_ITEM)) {
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SelectorEngine__default['default'].findOne(SELECTOR_DROPDOWN_TOGGLE, link.closest(SELECTOR_DROPDOWN)).classList.add(CLASS_NAME_ACTIVE);
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link.classList.add(CLASS_NAME_ACTIVE);
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} else {
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// Set triggered link as active
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link.classList.add(CLASS_NAME_ACTIVE);
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SelectorEngine__default['default'].parents(link, SELECTOR_NAV_LIST_GROUP).forEach(listGroup => {
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// Set triggered links parents as active
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// With both <ul> and <nav> markup a parent is the previous sibling of any nav ancestor
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SelectorEngine__default['default'].prev(listGroup, `${SELECTOR_NAV_LINKS}, ${SELECTOR_LIST_ITEMS}`).forEach(item => item.classList.add(CLASS_NAME_ACTIVE)); // Handle special case when .nav-link is inside .nav-item
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SelectorEngine__default['default'].prev(listGroup, SELECTOR_NAV_ITEMS).forEach(navItem => {
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SelectorEngine__default['default'].children(navItem, SELECTOR_NAV_LINKS).forEach(item => item.classList.add(CLASS_NAME_ACTIVE));
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});
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});
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}
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EventHandler__default['default'].trigger(this._scrollElement, EVENT_ACTIVATE, {
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relatedTarget: target
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});
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}
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_clear() {
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SelectorEngine__default['default'].find(this._selector).filter(node => node.classList.contains(CLASS_NAME_ACTIVE)).forEach(node => node.classList.remove(CLASS_NAME_ACTIVE));
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} // Static
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static jQueryInterface(config) {
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return this.each(function () {
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const data = ScrollSpy.getOrCreateInstance(this, config);
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if (typeof config !== 'string') {
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return;
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}
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if (typeof data[config] === 'undefined') {
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throw new TypeError(`No method named "${config}"`);
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}
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data[config]();
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});
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}
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}
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/**
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* ------------------------------------------------------------------------
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* Data Api implementation
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* ------------------------------------------------------------------------
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*/
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EventHandler__default['default'].on(window, EVENT_LOAD_DATA_API, () => {
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SelectorEngine__default['default'].find(SELECTOR_DATA_SPY).forEach(spy => new ScrollSpy(spy));
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});
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/**
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* ------------------------------------------------------------------------
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* jQuery
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* ------------------------------------------------------------------------
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* add .ScrollSpy to jQuery only if jQuery is present
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*/
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defineJQueryPlugin(ScrollSpy);
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return ScrollSpy;
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})));
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//# sourceMappingURL=scrollspy.js.map
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