mirror of
https://github.com/twbs/bootstrap.git
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376 lines
12 KiB
JavaScript
376 lines
12 KiB
JavaScript
/*!
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* Bootstrap scrollspy.js v4.5.0 (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/master/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('jquery'), require('./util.js')) :
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typeof define === 'function' && define.amd ? define(['jquery', './util.js'], factory) :
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(global = global || self, global.ScrollSpy = factory(global.jQuery, global.Util));
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}(this, (function ($, Util) { 'use strict';
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$ = $ && Object.prototype.hasOwnProperty.call($, 'default') ? $['default'] : $;
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Util = Util && Object.prototype.hasOwnProperty.call(Util, 'default') ? Util['default'] : Util;
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function _defineProperties(target, props) {
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for (var i = 0; i < props.length; i++) {
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var descriptor = props[i];
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descriptor.enumerable = descriptor.enumerable || false;
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descriptor.configurable = true;
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if ("value" in descriptor) descriptor.writable = true;
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Object.defineProperty(target, descriptor.key, descriptor);
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}
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}
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function _createClass(Constructor, protoProps, staticProps) {
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if (protoProps) _defineProperties(Constructor.prototype, protoProps);
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if (staticProps) _defineProperties(Constructor, staticProps);
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return Constructor;
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}
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function _defineProperty(obj, key, value) {
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if (key in obj) {
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Object.defineProperty(obj, key, {
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value: value,
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enumerable: true,
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configurable: true,
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writable: true
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});
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} else {
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obj[key] = value;
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}
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return obj;
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}
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function ownKeys(object, enumerableOnly) {
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var keys = Object.keys(object);
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if (Object.getOwnPropertySymbols) {
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var symbols = Object.getOwnPropertySymbols(object);
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if (enumerableOnly) symbols = symbols.filter(function (sym) {
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return Object.getOwnPropertyDescriptor(object, sym).enumerable;
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});
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keys.push.apply(keys, symbols);
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}
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return keys;
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}
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function _objectSpread2(target) {
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for (var i = 1; i < arguments.length; i++) {
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var source = arguments[i] != null ? arguments[i] : {};
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if (i % 2) {
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ownKeys(Object(source), true).forEach(function (key) {
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_defineProperty(target, key, source[key]);
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});
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} else if (Object.getOwnPropertyDescriptors) {
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Object.defineProperties(target, Object.getOwnPropertyDescriptors(source));
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} else {
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ownKeys(Object(source)).forEach(function (key) {
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Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key));
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});
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}
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}
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return target;
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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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var NAME = 'scrollspy';
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var VERSION = '4.5.0';
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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 JQUERY_NO_CONFLICT = $.fn[NAME];
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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_ITEMS = '.dropdown-item';
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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 + " " + SELECTOR_DROPDOWN_ITEMS);
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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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$(this._scrollElement).on(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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} // 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 = [].slice.call(document.querySelectorAll(this._selector));
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targets.map(function (element) {
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var target;
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var targetSelector = Util.getSelectorFromElement(element);
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if (targetSelector) {
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target = document.querySelector(targetSelector);
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}
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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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// TODO (fat): remove sketch reliance on jQuery position/offset
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return [$(target)[offsetMethod]().top + offsetBase, targetSelector];
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}
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}
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return null;
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}).filter(function (item) {
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return item;
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}).sort(function (a, b) {
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return a[0] - b[0];
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}).forEach(function (item) {
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_this2._offsets.push(item[0]);
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_this2._targets.push(item[1]);
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});
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};
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_proto.dispose = function dispose() {
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$.removeData(this._element, DATA_KEY);
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$(this._scrollElement).off(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 = _objectSpread2(_objectSpread2({}, Default), typeof config === 'object' && config ? config : {});
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if (typeof config.target !== 'string' && Util.isElement(config.target)) {
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var id = $(config.target).attr('id');
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if (!id) {
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id = Util.getUID(NAME);
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$(config.target).attr('id', id);
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}
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config.target = "#" + id;
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}
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Util.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 = $([].slice.call(document.querySelectorAll(queries.join(','))));
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if ($link.hasClass(CLASS_NAME_DROPDOWN_ITEM)) {
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$link.closest(SELECTOR_DROPDOWN).find(SELECTOR_DROPDOWN_TOGGLE).addClass(CLASS_NAME_ACTIVE);
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$link.addClass(CLASS_NAME_ACTIVE);
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} else {
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// Set triggered link as active
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$link.addClass(CLASS_NAME_ACTIVE); // Set triggered links parents as active
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// With both <ul> and <nav> markup a parent is the previous sibling of any nav ancestor
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$link.parents(SELECTOR_NAV_LIST_GROUP).prev(SELECTOR_NAV_LINKS + ", " + SELECTOR_LIST_ITEMS).addClass(CLASS_NAME_ACTIVE); // Handle special case when .nav-link is inside .nav-item
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$link.parents(SELECTOR_NAV_LIST_GROUP).prev(SELECTOR_NAV_ITEMS).children(SELECTOR_NAV_LINKS).addClass(CLASS_NAME_ACTIVE);
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}
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$(this._scrollElement).trigger(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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[].slice.call(document.querySelectorAll(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 = $(this).data(DATA_KEY);
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var _config = typeof config === 'object' && config;
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if (!data) {
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data = new ScrollSpy(this, _config);
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$(this).data(DATA_KEY, data);
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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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_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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$(window).on(EVENT_LOAD_DATA_API, function () {
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var scrollSpys = [].slice.call(document.querySelectorAll(SELECTOR_DATA_SPY));
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var scrollSpysLength = scrollSpys.length;
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for (var i = scrollSpysLength; i--;) {
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var $spy = $(scrollSpys[i]);
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ScrollSpy._jQueryInterface.call($spy, $spy.data());
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}
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});
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/**
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* ------------------------------------------------------------------------
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* jQuery
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* ------------------------------------------------------------------------
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*/
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$.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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return ScrollSpy;
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})));
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//# sourceMappingURL=scrollspy.js.map
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