aboutsummaryrefslogtreecommitdiffstats
path: root/vendor/twbs/bootstrap/js/dist/scrollspy.js
blob: 87c2bb290a78a3d4bc5859a7387eeb48a02694a2 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
/*!
  * Bootstrap scrollspy.js v5.0.1 (https://getbootstrap.com/)
  * Copyright 2011-2021 The Bootstrap Authors (https://github.com/twbs/bootstrap/graphs/contributors)
  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
  */
(function (global, factory) {
  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')) :
  typeof define === 'function' && define.amd ? define(['./dom/selector-engine', './dom/event-handler', './dom/manipulator', './base-component'], factory) :
  (global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.ScrollSpy = factory(global.SelectorEngine, global.EventHandler, global.Manipulator, global.Base));
}(this, (function (SelectorEngine, EventHandler, Manipulator, BaseComponent) { 'use strict';

  function _interopDefaultLegacy (e) { return e && typeof e === 'object' && 'default' in e ? e : { 'default': e }; }

  var SelectorEngine__default = /*#__PURE__*/_interopDefaultLegacy(SelectorEngine);
  var EventHandler__default = /*#__PURE__*/_interopDefaultLegacy(EventHandler);
  var Manipulator__default = /*#__PURE__*/_interopDefaultLegacy(Manipulator);
  var BaseComponent__default = /*#__PURE__*/_interopDefaultLegacy(BaseComponent);

  /**
   * --------------------------------------------------------------------------
   * Bootstrap (v5.0.1): util/index.js
   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
   * --------------------------------------------------------------------------
   */

  const MAX_UID = 1000000;

  const toType = obj => {
    if (obj === null || obj === undefined) {
      return `${obj}`;
    }

    return {}.toString.call(obj).match(/\s([a-z]+)/i)[1].toLowerCase();
  };
  /**
   * --------------------------------------------------------------------------
   * Public Util Api
   * --------------------------------------------------------------------------
   */


  const getUID = prefix => {
    do {
      prefix += Math.floor(Math.random() * MAX_UID);
    } while (document.getElementById(prefix));

    return prefix;
  };

  const getSelector = element => {
    let selector = element.getAttribute('data-bs-target');

    if (!selector || selector === '#') {
      let hrefAttr = element.getAttribute('href'); // The only valid content that could double as a selector are IDs or classes,
      // so everything starting with `#` or `.`. If a "real" URL is used as the selector,
      // `document.querySelector` will rightfully complain it is invalid.
      // See https://github.com/twbs/bootstrap/issues/32273

      if (!hrefAttr || !hrefAttr.includes('#') && !hrefAttr.startsWith('.')) {
        return null;
      } // Just in case some CMS puts out a full URL with the anchor appended


      if (hrefAttr.includes('#') && !hrefAttr.startsWith('#')) {
        hrefAttr = `#${hrefAttr.split('#')[1]}`;
      }

      selector = hrefAttr && hrefAttr !== '#' ? hrefAttr.trim() : null;
    }

    return selector;
  };

  const getSelectorFromElement = element => {
    const selector = getSelector(element);

    if (selector) {
      return document.querySelector(selector) ? selector : null;
    }

    return null;
  };

  const isElement = obj => {
    if (!obj || typeof obj !== 'object') {
      return false;
    }

    if (typeof obj.jquery !== 'undefined') {
      obj = obj[0];
    }

    return typeof obj.nodeType !== 'undefined';
  };

  const typeCheckConfig = (componentName, config, configTypes) => {
    Object.keys(configTypes).forEach(property => {
      const expectedTypes = configTypes[property];
      const value = config[property];
      const valueType = value && isElement(value) ? 'element' : toType(value);

      if (!new RegExp(expectedTypes).test(valueType)) {
        throw new TypeError(`${componentName.toUpperCase()}: Option "${property}" provided type "${valueType}" but expected type "${expectedTypes}".`);
      }
    });
  };

  const getjQuery = () => {
    const {
      jQuery
    } = window;

    if (jQuery && !document.body.hasAttribute('data-bs-no-jquery')) {
      return jQuery;
    }

    return null;
  };

  const onDOMContentLoaded = callback => {
    if (document.readyState === 'loading') {
      document.addEventListener('DOMContentLoaded', callback);
    } else {
      callback();
    }
  };

  const defineJQueryPlugin = plugin => {
    onDOMContentLoaded(() => {
      const $ = getjQuery();
      /* istanbul ignore if */

      if ($) {
        const name = plugin.NAME;
        const JQUERY_NO_CONFLICT = $.fn[name];
        $.fn[name] = plugin.jQueryInterface;
        $.fn[name].Constructor = plugin;

        $.fn[name].noConflict = () => {
          $.fn[name] = JQUERY_NO_CONFLICT;
          return plugin.jQueryInterface;
        };
      }
    });
  };

  /**
   * --------------------------------------------------------------------------
   * Bootstrap (v5.0.1): scrollspy.js
   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
   * --------------------------------------------------------------------------
   */
  /**
   * ------------------------------------------------------------------------
   * Constants
   * ------------------------------------------------------------------------
   */

  const NAME = 'scrollspy';
  const DATA_KEY = 'bs.scrollspy';
  const EVENT_KEY = `.${DATA_KEY}`;
  const DATA_API_KEY = '.data-api';
  const Default = {
    offset: 10,
    method: 'auto',
    target: ''
  };
  const DefaultType = {
    offset: 'number',
    method: 'string',
    target: '(string|element)'
  };
  const EVENT_ACTIVATE = `activate${EVENT_KEY}`;
  const EVENT_SCROLL = `scroll${EVENT_KEY}`;
  const EVENT_LOAD_DATA_API = `load${EVENT_KEY}${DATA_API_KEY}`;
  const CLASS_NAME_DROPDOWN_ITEM = 'dropdown-item';
  const CLASS_NAME_ACTIVE = 'active';
  const SELECTOR_DATA_SPY = '[data-bs-spy="scroll"]';
  const SELECTOR_NAV_LIST_GROUP = '.nav, .list-group';
  const SELECTOR_NAV_LINKS = '.nav-link';
  const SELECTOR_NAV_ITEMS = '.nav-item';
  const SELECTOR_LIST_ITEMS = '.list-group-item';
  const SELECTOR_DROPDOWN = '.dropdown';
  const SELECTOR_DROPDOWN_TOGGLE = '.dropdown-toggle';
  const METHOD_OFFSET = 'offset';
  const METHOD_POSITION = 'position';
  /**
   * ------------------------------------------------------------------------
   * Class Definition
   * ------------------------------------------------------------------------
   */

  class ScrollSpy extends BaseComponent__default['default'] {
    constructor(element, config) {
      super(element);
      this._scrollElement = this._element.tagName === 'BODY' ? window : this._element;
      this._config = this._getConfig(config);
      this._selector = `${this._config.target} ${SELECTOR_NAV_LINKS}, ${this._config.target} ${SELECTOR_LIST_ITEMS}, ${this._config.target} .${CLASS_NAME_DROPDOWN_ITEM}`;
      this._offsets = [];
      this._targets = [];
      this._activeTarget = null;
      this._scrollHeight = 0;
      EventHandler__default['default'].on(this._scrollElement, EVENT_SCROLL, () => this._process());
      this.refresh();

      this._process();
    } // Getters


    static get Default() {
      return Default;
    }

    static get NAME() {
      return NAME;
    } // Public


    refresh() {
      const autoMethod = this._scrollElement === this._scrollElement.window ? METHOD_OFFSET : METHOD_POSITION;
      const offsetMethod = this._config.method === 'auto' ? autoMethod : this._config.method;
      const offsetBase = offsetMethod === METHOD_POSITION ? this._getScrollTop() : 0;
      this._offsets = [];
      this._targets = [];
      this._scrollHeight = this._getScrollHeight();
      const targets = SelectorEngine__default['default'].find(this._selector);
      targets.map(element => {
        const targetSelector = getSelectorFromElement(element);
        const target = targetSelector ? SelectorEngine__default['default'].findOne(targetSelector) : null;

        if (target) {
          const targetBCR = target.getBoundingClientRect();

          if (targetBCR.width || targetBCR.height) {
            return [Manipulator__default['default'][offsetMethod](target).top + offsetBase, targetSelector];
          }
        }

        return null;
      }).filter(item => item).sort((a, b) => a[0] - b[0]).forEach(item => {
        this._offsets.push(item[0]);

        this._targets.push(item[1]);
      });
    }

    dispose() {
      EventHandler__default['default'].off(this._scrollElement, EVENT_KEY);
      super.dispose();
    } // Private


    _getConfig(config) {
      config = { ...Default,
        ...Manipulator__default['default'].getDataAttributes(this._element),
        ...(typeof config === 'object' && config ? config : {})
      };

      if (typeof config.target !== 'string' && isElement(config.target)) {
        let {
          id
        } = config.target;

        if (!id) {
          id = getUID(NAME);
          config.target.id = id;
        }

        config.target = `#${id}`;
      }

      typeCheckConfig(NAME, config, DefaultType);
      return config;
    }

    _getScrollTop() {
      return this._scrollElement === window ? this._scrollElement.pageYOffset : this._scrollElement.scrollTop;
    }

    _getScrollHeight() {
      return this._scrollElement.scrollHeight || Math.max(document.body.scrollHeight, document.documentElement.scrollHeight);
    }

    _getOffsetHeight() {
      return this._scrollElement === window ? window.innerHeight : this._scrollElement.getBoundingClientRect().height;
    }

    _process() {
      const scrollTop = this._getScrollTop() + this._config.offset;

      const scrollHeight = this._getScrollHeight();

      const maxScroll = this._config.offset + scrollHeight - this._getOffsetHeight();

      if (this._scrollHeight !== scrollHeight) {
        this.refresh();
      }

      if (scrollTop >= maxScroll) {
        const target = this._targets[this._targets.length - 1];

        if (this._activeTarget !== target) {
          this._activate(target);
        }

        return;
      }

      if (this._activeTarget && scrollTop < this._offsets[0] && this._offsets[0] > 0) {
        this._activeTarget = null;

        this._clear();

        return;
      }

      for (let i = this._offsets.length; i--;) {
        const isActiveTarget = this._activeTarget !== this._targets[i] && scrollTop >= this._offsets[i] && (typeof this._offsets[i + 1] === 'undefined' || scrollTop < this._offsets[i + 1]);

        if (isActiveTarget) {
          this._activate(this._targets[i]);
        }
      }
    }

    _activate(target) {
      this._activeTarget = target;

      this._clear();

      const queries = this._selector.split(',').map(selector => `${selector}[data-bs-target="${target}"],${selector}[href="${target}"]`);

      const link = SelectorEngine__default['default'].findOne(queries.join(','));

      if (link.classList.contains(CLASS_NAME_DROPDOWN_ITEM)) {
        SelectorEngine__default['default'].findOne(SELECTOR_DROPDOWN_TOGGLE, link.closest(SELECTOR_DROPDOWN)).classList.add(CLASS_NAME_ACTIVE);
        link.classList.add(CLASS_NAME_ACTIVE);
      } else {
        // Set triggered link as active
        link.classList.add(CLASS_NAME_ACTIVE);
        SelectorEngine__default['default'].parents(link, SELECTOR_NAV_LIST_GROUP).forEach(listGroup => {
          // Set triggered links parents as active
          // With both <ul> and <nav> markup a parent is the previous sibling of any nav ancestor
          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

          SelectorEngine__default['default'].prev(listGroup, SELECTOR_NAV_ITEMS).forEach(navItem => {
            SelectorEngine__default['default'].children(navItem, SELECTOR_NAV_LINKS).forEach(item => item.classList.add(CLASS_NAME_ACTIVE));
          });
        });
      }

      EventHandler__default['default'].trigger(this._scrollElement, EVENT_ACTIVATE, {
        relatedTarget: target
      });
    }

    _clear() {
      SelectorEngine__default['default'].find(this._selector).filter(node => node.classList.contains(CLASS_NAME_ACTIVE)).forEach(node => node.classList.remove(CLASS_NAME_ACTIVE));
    } // Static


    static jQueryInterface(config) {
      return this.each(function () {
        const data = ScrollSpy.getInstance(this) || new ScrollSpy(this, typeof config === 'object' ? config : {});

        if (typeof config !== 'string') {
          return;
        }

        if (typeof data[config] === 'undefined') {
          throw new TypeError(`No method named "${config}"`);
        }

        data[config]();
      });
    }

  }
  /**
   * ------------------------------------------------------------------------
   * Data Api implementation
   * ------------------------------------------------------------------------
   */


  EventHandler__default['default'].on(window, EVENT_LOAD_DATA_API, () => {
    SelectorEngine__default['default'].find(SELECTOR_DATA_SPY).forEach(spy => new ScrollSpy(spy));
  });
  /**
   * ------------------------------------------------------------------------
   * jQuery
   * ------------------------------------------------------------------------
   * add .ScrollSpy to jQuery only if jQuery is present
   */

  defineJQueryPlugin(ScrollSpy);

  return ScrollSpy;

})));
//# sourceMappingURL=scrollspy.js.map