mirror of
https://github.com/twbs/bootstrap.git
synced 2022-11-09 12:25:43 -05:00
415 lines
15 KiB
JavaScript
415 lines
15 KiB
JavaScript
/*!
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* Bootstrap scrollspy.js v5.0.0-alpha3 (https://getbootstrap.com/)
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* Copyright 2011-2020 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/data.js'), require('./dom/event-handler.js'), require('./dom/manipulator.js'), require('./dom/selector-engine.js')) :
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typeof define === 'function' && define.amd ? define(['./dom/data.js', './dom/event-handler.js', './dom/manipulator.js', './dom/selector-engine.js'], factory) :
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(global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.ScrollSpy = factory(global.Data, global.EventHandler, global.Manipulator, global.SelectorEngine));
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}(this, (function (Data, EventHandler, Manipulator, SelectorEngine) { '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 Data__default = /*#__PURE__*/_interopDefaultLegacy(Data);
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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 SelectorEngine__default = /*#__PURE__*/_interopDefaultLegacy(SelectorEngine);
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/**
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* --------------------------------------------------------------------------
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* Bootstrap (v5.0.0-alpha3): 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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var MAX_UID = 1000000;
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var toType = function 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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var getUID = function 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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var getSelector = function getSelector(element) {
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var selector = element.getAttribute('data-target');
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if (!selector || selector === '#') {
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var hrefAttr = element.getAttribute('href');
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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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var getSelectorFromElement = function getSelectorFromElement(element) {
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var 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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var isElement = function isElement(obj) {
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return (obj[0] || obj).nodeType;
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};
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var typeCheckConfig = function typeCheckConfig(componentName, config, configTypes) {
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Object.keys(configTypes).forEach(function (property) {
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var expectedTypes = configTypes[property];
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var value = config[property];
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var valueType = value && isElement(value) ? 'element' : toType(value);
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if (!new RegExp(expectedTypes).test(valueType)) {
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throw new Error(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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var getjQuery = function getjQuery() {
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var _window = window,
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jQuery = _window.jQuery;
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if (jQuery && !document.body.hasAttribute('data-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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var onDOMContentLoaded = function onDOMContentLoaded(callback) {
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if (document.readyState === 'loading') {
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document.addEventListener('DOMContentLoaded', callback);
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} else {
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callback();
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}
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};
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function _extends() { _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends.apply(this, arguments); }
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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); } }
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function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
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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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var NAME = 'scrollspy';
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var VERSION = '5.0.0-alpha3';
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var DATA_KEY = 'bs.scrollspy';
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var EVENT_KEY = "." + DATA_KEY;
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var DATA_API_KEY = '.data-api';
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var 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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var 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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var EVENT_ACTIVATE = "activate" + EVENT_KEY;
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var EVENT_SCROLL = "scroll" + EVENT_KEY;
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var EVENT_LOAD_DATA_API = "load" + EVENT_KEY + DATA_API_KEY;
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var CLASS_NAME_DROPDOWN_ITEM = 'dropdown-item';
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var CLASS_NAME_ACTIVE = 'active';
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var SELECTOR_DATA_SPY = '[data-spy="scroll"]';
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var SELECTOR_NAV_LIST_GROUP = '.nav, .list-group';
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var SELECTOR_NAV_LINKS = '.nav-link';
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var SELECTOR_NAV_ITEMS = '.nav-item';
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var SELECTOR_LIST_ITEMS = '.list-group-item';
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var SELECTOR_DROPDOWN = '.dropdown';
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var SELECTOR_DROPDOWN_TOGGLE = '.dropdown-toggle';
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var METHOD_OFFSET = 'offset';
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var 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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var ScrollSpy = /*#__PURE__*/function () {
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function ScrollSpy(element, config) {
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var _this = this;
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this._element = element;
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this._scrollElement = element.tagName === 'BODY' ? window : 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, function (event) {
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return _this._process(event);
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});
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this.refresh();
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this._process();
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Data__default['default'].setData(element, DATA_KEY, this);
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} // Getters
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var _proto = ScrollSpy.prototype;
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// Public
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_proto.refresh = function refresh() {
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var _this2 = this;
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var autoMethod = this._scrollElement === this._scrollElement.window ? METHOD_OFFSET : METHOD_POSITION;
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var offsetMethod = this._config.method === 'auto' ? autoMethod : this._config.method;
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var 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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var targets = SelectorEngine__default['default'].find(this._selector);
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targets.map(function (element) {
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var targetSelector = getSelectorFromElement(element);
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var target = targetSelector ? SelectorEngine__default['default'].findOne(targetSelector) : null;
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if (target) {
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var 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(function (item) {
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return item;
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}).sort(function (a, b) {
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return a[0] - b[0];
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}).forEach(function (item) {
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_this2._offsets.push(item[0]);
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_this2._targets.push(item[1]);
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});
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};
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_proto.dispose = function dispose() {
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Data__default['default'].removeData(this._element, DATA_KEY);
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EventHandler__default['default'].off(this._scrollElement, EVENT_KEY);
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this._element = null;
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this._scrollElement = null;
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this._config = null;
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this._selector = null;
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this._offsets = null;
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this._targets = null;
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this._activeTarget = null;
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this._scrollHeight = null;
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} // Private
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;
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_proto._getConfig = function _getConfig(config) {
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config = _extends({}, Default, typeof config === 'object' && config ? config : {});
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if (typeof config.target !== 'string' && isElement(config.target)) {
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var id = config.target.id;
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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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_proto._getScrollTop = function _getScrollTop() {
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return this._scrollElement === window ? this._scrollElement.pageYOffset : this._scrollElement.scrollTop;
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};
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_proto._getScrollHeight = function _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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_proto._getOffsetHeight = function _getOffsetHeight() {
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return this._scrollElement === window ? window.innerHeight : this._scrollElement.getBoundingClientRect().height;
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};
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_proto._process = function _process() {
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var scrollTop = this._getScrollTop() + this._config.offset;
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var scrollHeight = this._getScrollHeight();
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var 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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var 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 (var i = this._offsets.length; i--;) {
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var 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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_proto._activate = function _activate(target) {
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this._activeTarget = target;
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this._clear();
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var queries = this._selector.split(',').map(function (selector) {
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return selector + "[data-target=\"" + target + "\"]," + selector + "[href=\"" + target + "\"]";
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});
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var 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(function (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(function (item) {
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return item.classList.add(CLASS_NAME_ACTIVE);
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}); // Handle special case when .nav-link is inside .nav-item
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SelectorEngine__default['default'].prev(listGroup, SELECTOR_NAV_ITEMS).forEach(function (navItem) {
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SelectorEngine__default['default'].children(navItem, SELECTOR_NAV_LINKS).forEach(function (item) {
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return item.classList.add(CLASS_NAME_ACTIVE);
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});
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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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_proto._clear = function _clear() {
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SelectorEngine__default['default'].find(this._selector).filter(function (node) {
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return node.classList.contains(CLASS_NAME_ACTIVE);
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}).forEach(function (node) {
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return node.classList.remove(CLASS_NAME_ACTIVE);
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});
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} // Static
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;
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ScrollSpy.jQueryInterface = function jQueryInterface(config) {
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return this.each(function () {
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var data = Data__default['default'].getData(this, DATA_KEY);
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var _config = typeof config === 'object' && config;
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if (!data) {
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data = new ScrollSpy(this, _config);
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}
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if (typeof config === 'string') {
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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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ScrollSpy.getInstance = function getInstance(element) {
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return Data__default['default'].getData(element, DATA_KEY);
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};
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_createClass(ScrollSpy, null, [{
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key: "VERSION",
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get: function get() {
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return VERSION;
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}
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}, {
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key: "Default",
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get: function get() {
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return Default;
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}
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}]);
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return ScrollSpy;
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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, function () {
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SelectorEngine__default['default'].find(SELECTOR_DATA_SPY).forEach(function (spy) {
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return new ScrollSpy(spy, Manipulator__default['default'].getDataAttributes(spy));
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});
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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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onDOMContentLoaded(function () {
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var $ = getjQuery();
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/* istanbul ignore if */
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if ($) {
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var JQUERY_NO_CONFLICT = $.fn[NAME];
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$.fn[NAME] = ScrollSpy.jQueryInterface;
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$.fn[NAME].Constructor = ScrollSpy;
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$.fn[NAME].noConflict = function () {
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$.fn[NAME] = JQUERY_NO_CONFLICT;
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return ScrollSpy.jQueryInterface;
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};
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}
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});
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return ScrollSpy;
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})));
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//# sourceMappingURL=scrollspy.js.map
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