https://www.northonline.com.au/etc.clientlibs/amp-au/clientlibs/cl…e.lc-c0ab4a64f12ceb188d28b0e9426fb348-lc.js

1(function(root, factory) {
2    if (typeof define === 'function' && define.amd) {
3        define(factory)
4    } else if (typeof exports === 'object') {
5        module.exports = factory()
6    } else {
7        root.tingle = factory()
8    }
9}(this, function() {
10
11    /* ----------------------------------------------------------- */
12    /* == modal */
13    /* ----------------------------------------------------------- */
14
15    var transitionEvent = whichTransitionEvent()
16    var isBusy = false
17
18    function Modal(options) {
19        var defaults = {
20            onClose: null,
21            onOpen: null,
22            beforeOpen: null,
23            beforeClose: null,
24            stickyFooter: false,
25            footer: false,
26            cssClass: [],
27            closeLabel: 'Close',
28            closeMethods: []
29        }
30
31        // extends config
32        this.opts = extend({}, defaults, options)
33        
34        // init modal
35        this.init()
36    }
37
38    Modal.prototype.init = function() {
39        if (this.modal) {
40            return
41        }
42
43        _build.call(this)
44        _bindEvents.call(this)
45        
46        // insert modal in dom
47        document.body.insertBefore(this.modal, document.body.firstChild)
48
49        if (this.opts.footer) {
50            this.addFooter()
51        }
52
53        return this
54    }
55
56    Modal.prototype._busy = function(state) {
57        isBusy = state
58    }
59
60    Modal.prototype._isBusy = function() {
61        return isBusy
62    }
63
64    Modal.prototype.destroy = function() {
65        if (this.modal === null) {
66            return
67        }
68
69        // restore scrolling
70        if (this.isOpen()) {
71            this.close(true)
72        }
73
74        // unbind all events
75        _unbindEvents.call(this)
76
77        // remove modal from dom
78        this.modal.parentNode.removeChild(this.modal)
79
80        this.modal = null
81    }
82
83    Modal.prototype.isOpen = function() {
84        return !!this.modal.classList.contains('tingle-modal--visible')
85    }
86
87    Modal.prototype.open = function() {
88        if(this._isBusy()) return
89        this._busy(true)
90
91        var self = this
92
93        // before open callback
94        if (typeof self.opts.beforeOpen === 'function') {
95            self.opts.beforeOpen()
96        }
97
98        if (this.modal.style.removeProperty) {
99            this.modal.style.removeProperty('display')
100        } else {
101            this.modal.style.removeAttribute('display')
102        }
103
104        // prevent double scroll
105        this._scrollPosition = window.pageYOffset
106        document.body.classList.add('tingle-enabled')
107        document.body.style.top = -this._scrollPosition + 'px'
108
109        // sticky footer
110        this.setStickyFooter(this.opts.stickyFooter)
111
112        // show modal
113        this.modal.classList.add('tingle-modal--visible')
114
115        if (transitionEvent) {
116            this.modal.addEventListener(transitionEvent, function handler() {
117                if (typeof self.opts.onOpen === 'function') {
118                    self.opts.onOpen.call(self)
119                }
120
121                // detach event after transition end (so it doesn't fire multiple onOpen)
122                self.modal.removeEventListener(transitionEvent, handler, false)
123                self._busy(false)
124            }, false)
125        } else {
126            if (typeof self.opts.onOpen === 'function') {
127                self.opts.onOpen.call(self)
128            }
129            self._busy(false)
130        }
131
132        // check if modal is bigger than screen height
133        this.checkOverflow()
134
135        return this
136    }
137
138    Modal.prototype.close = function(force) {
139        if(this._isBusy()) return
140        this._busy(true)
141        force = force || false
142
143        //  before close
144        if (typeof this.opts.beforeClose === 'function') {
145            var close = this.opts.beforeClose.call(this)
146            if (!close) {
147                this._busy(false)
148                return
149            }
150        }
151
152        document.body.classList.remove('tingle-enabled')
153        window.scrollTo(0, this._scrollPosition)
154        document.body.style.top = null
155
156        this.modal.classList.remove('tingle-modal--visible')
157
158        // using similar setup as onOpen
159        // reference to the Modal that's created
160        var self = this
161
162        if (force) {
163            self.modal.style.display = 'none'
164            if (typeof self.opts.onClose === 'function') {
165                self.opts.onClose.call(this)
166            }
167            self._busy(false)
168        } else if (transitionEvent) {
169            // track when transition is happening then run onClose on complete
170            this.modal.addEventListener(transitionEvent, function handler() {
171                // detach event after transition end (so it doesn't fire multiple onClose)
172                self.modal.removeEventListener(transitionEvent, handler, false)
173
174                self.modal.style.display = 'none'
175
176                // on close callback
177                if (typeof self.opts.onClose === 'function') {
178                    self.opts.onClose.call(this)
179                }
180
181                self._busy(false)
182
183            }, false)
184        } else {
185            self.modal.style.display = 'none'
186            // on close callback
187            if (typeof self.opts.onClose === 'function') {
188                self.opts.onClose.call(this)
189            }
190            self._busy(false)
191        }
192    }
193
194    Modal.prototype.setContent = function(content) {
195        // check type of content : String or Node
196        if (typeof content === 'string') {
197            this.modalBoxContent.innerHTML = content
198        } else {
199            this.modalBoxContent.innerHTML = ''
200            this.modalBoxContent.appendChild(content)
201        }
202
203        if (this.isOpen()) {
204            // check if modal is bigger than screen height
205            this.checkOverflow()
206        }
207        
208        return this
209    }
210
211    Modal.prototype.getContent = function() {
212        return this.modalBoxContent
213    }
214
215    Modal.prototype.addFooter = function() {
216        // add footer to modal
217        _buildFooter.call(this)
218
219        return this
220    }
221
222    Modal.prototype.setFooterContent = function(content) {
223        // set footer content
224        this.modalBoxFooter.innerHTML = content
225
226        return this
227    }
228
229    Modal.prototype.getFooterContent = function() {
230        return this.modalBoxFooter
231    }
232
233    Modal.prototype.setStickyFooter = function(isSticky) {
234        // if the modal is smaller than the viewport height, we don't need sticky
235        if (!this.isOverflow()) {
236            isSticky = false
237        }
238
239        if (isSticky) {
240            if (this.modalBox.contains(this.modalBoxFooter)) {
241                this.modalBox.removeChild(this.modalBoxFooter)
242                this.modal.appendChild(this.modalBoxFooter)
243                this.modalBoxFooter.classList.add('tingle-modal-box__footer--sticky')
244                _recalculateFooterPosition.call(this)
245                this.modalBoxContent.style['padding-bottom'] = this.modalBoxFooter.clientHeight + 20 + 'px'
246            }
247        } else if (this.modalBoxFooter) {
248            if (!this.modalBox.contains(this.modalBoxFooter)) {
249                this.modal.removeChild(this.modalBoxFooter)
250                this.modalBox.appendChild(this.modalBoxFooter)
251                this.modalBoxFooter.style.width = 'auto'
252                this.modalBoxFooter.style.left = ''
253                this.modalBoxContent.style['padding-bottom'] = ''
254                this.modalBoxFooter.classList.remove('tingle-modal-box__footer--sticky')
255            }
256        }
257
258        return this
259    }
260
261
262    Modal.prototype.addFooterBtn = function(label, cssClass, callback) {
263        var btn = document.createElement('button')
264                
265        // set label
266        btn.innerHTML = label
267
268        // bind callback
269        btn.addEventListener('click', callback)
270
271        if (typeof cssClass === 'string' && cssClass.length) {
272            // add classes to btn
273            cssClass.split(' ').forEach(function(item) {
274                btn.classList.add(item)
275            })
276        }
277
278        this.modalBoxFooter.appendChild(btn)
279
280        return btn
281    }
282
283    Modal.prototype.resize = function() {
284        // eslint-disable-next-line no-console
285        console.warn('Resize is deprecated and will be removed in version 1.0')
286    }
287
288    Modal.prototype.isOverflow = function() {

289        var viewportHeight = window.innerHeight
290        var modalHeight = this.modalBox.clientHeight
291
292        return modalHeight >= viewportHeight
293    }
294
295    Modal.prototype.checkOverflow = function() {
296        // only if the modal is currently shown
297        if (this.modal.classList.contains('tingle-modal--visible')) {
298            if (this.isOverflow()) {
299                this.modal.classList.add('tingle-modal--overflow')
300            } else {
301                this.modal.classList.remove('tingle-modal--overflow')
302            }
303
304            // tODO: remove offset
305            // _offset.call(this);
306            if (!this.isOverflow() && this.opts.stickyFooter) {
307                this.setStickyFooter(false)
308            } else if (this.isOverflow() && this.opts.stickyFooter) {
309                _recalculateFooterPosition.call(this)
310                this.setStickyFooter(true)
311            }
312        }
313    }
314
315
316    /* ----------------------------------------------------------- */
317    /* == private methods */
318    /* ----------------------------------------------------------- */
319
320    function _recalculateFooterPosition() {
321        if (!this.modalBoxFooter) {
322            return
323        }
324        this.modalBoxFooter.style.width = this.modalBox.clientWidth + 'px'
325        this.modalBoxFooter.style.left = this.modalBox.offsetLeft + 'px'
326    }
327
328    function _build() {
329
330        // wrapper
331        this.modal = document.createElement('div')
332        this.modal.classList.add('tingle-modal')
333
334        // remove cusor if no overlay close method
335        if (this.opts.closeMethods.length === 0 || this.opts.closeMethods.indexOf('overlay') === -1) {
336            this.modal.classList.add('tingle-modal--noOverlayClose')
337        }
338
339        this.modal.style.display = 'none'
340
341        // custom class
342        this.opts.cssClass.forEach(function(item) {
343            if (typeof item === 'string') {
344                this.modal.classList.add(item)
345            }
346        }, this)
347
348        // close btn
349        if (this.opts.closeMethods.indexOf('button') !== -1) {
350            this.modalCloseBtn = document.createElement('button')
351            this.modalCloseBtn.type = 'button'
352            this.modalCloseBtn.classList.add('tingle-modal__close')
353
354            this.modalCloseBtnIcon = document.createElement('span')
355            this.modalCloseBtnIcon.classList.add('tingle-modal__closeIcon')
356            this.modalCloseBtnIcon.innerHTML = '×'
357
358            this.modalCloseBtn.appendChild(this.modalCloseBtnIcon)
359        }
360
361        // modal
362        this.modalBox = document.createElement('div')
363        this.modalBox.classList.add('tingle-modal-box')
364
365        // modal box content
366        this.modalBoxContent = document.createElement('div')
367        this.modalBoxContent.classList.add('tingle-modal-box__content')
368
369        this.modalBox.appendChild(this.modalBoxContent)
370
371        if (this.opts.closeMethods.indexOf('button') !== -1) {
372            this.modal.appendChild(this.modalCloseBtn)
373        }
374
375        this.modal.appendChild(this.modalBox)
376
377    }
378
379    function _buildFooter() {
380        this.modalBoxFooter = document.createElement('div')
381        this.modalBoxFooter.classList.add('tingle-modal-box__footer')
382        this.modalBox.appendChild(this.modalBoxFooter)
383    }
384
385    function _bindEvents() {
386
387        this._events = {
388            clickCloseBtn: this.close.bind(this),
389            clickOverlay: _handleClickOutside.bind(this),
390            resize: this.checkOverflow.bind(this),
391            keyboardNav: _handleKeyboardNav.bind(this)
392        }
393
394        if (this.opts.closeMethods.indexOf('button') !== -1) {
395            this.modalCloseBtn.addEventListener('click', this._events.clickCloseBtn)
396        }
397
398        this.modal.addEventListener('mousedown', this._events.clickOverlay)
399        window.addEventListener('resize', this._events.resize)
400        document.addEventListener('keydown', this._events.keyboardNav)
401    }
402
403    function _handleKeyboardNav(event) {
404        // escape key
405        if (this.opts.closeMethods.indexOf('escape') !== -1 && event.which === 27 && this.isOpen()) {
406            this.close()
407        }
408    }
409
410    function _handleClickOutside(event) {
411        // if click is outside the modal
412        if (this.opts.closeMethods.indexOf('overlay') !== -1 && !_findAnce

412stor(event.target, 'tingle-modal') &&
413        event.clientX < this.modal.clientWidth) {
414            this.close()
415        }
416    }
417
418    function _findAncestor(el, cls) {
419        while ((el = el.parentElement) && !el.classList.contains(cls));
420        return el
421    }
422
423    function _unbindEvents() {
424        if (this.opts.closeMethods.indexOf('button') !== -1) {
425            this.modalCloseBtn.removeEventListener('click', this._events.clickCloseBtn)
426        }
427        this.modal.removeEventListener('mousedown', this._events.clickOverlay)
428        window.removeEventListener('resize', this._events.resize)
429        document.removeEventListener('keydown', this._events.keyboardNav)
430    }
431
432    /* ----------------------------------------------------------- */
433    /* == confirm */
434    /* ----------------------------------------------------------- */
435
436    // coming soon
437
438    /* ----------------------------------------------------------- */
439    /* == alert */
440    /* ----------------------------------------------------------- */
441
442    // coming soon
443
444    /* ----------------------------------------------------------- */
445    /* == helpers */
446    /* ----------------------------------------------------------- */
447
448    function extend() {
449        for (var i = 1; i < arguments.length; i++) {
450            for (var key in arguments[i]) {
451                if (arguments[i].hasOwnProperty(key)) {
452                    arguments[0][key] = arguments[i][key]
453                }
454            }
455        }
456        return arguments[0]
457    }
458
459    function whichTransitionEvent() {
460        var t
461        var el = document.createElement('tingle-test-transition')
462        var transitions = {
463            'transition': 'transitionend',
464            'OTransition': 'oTransitionEnd',
465            'MozTransition': 'transitionend',
466            'WebkitTransition': 'webkitTransitionEnd'
467        }
468
469        for (t in transitions) {
470            if (el.style[t] !== undefined) {
471                return transitions[t]
472            }
473        }
474    }
475
476    /* ----------------------------------------------------------- */
477    /* == return */
478    /* ----------------------------------------------------------- */
479
480    return {
481        modal: Modal
482    }
483
484}));
485function g() {
486    const o = ".aem-product-card-widget";
487    document.querySelectorAll(o).forEach(n => {
488        const r = n.querySelector(".aem-widget__accordion-toggle");
489        r.querySelector(".aem-widget__accordion-trigger").addEventListener("click", () => {
490            r.classList.toggle("aem-widget__accordion_closed")
491        })
492    })
493}
494
495function A() {
496    if (!window.matchMedia("(max-width: 632px)").matches) return;
497    const a = ".aem-banner-widget",
498        n = ".aem-widget__breadcrumbs_mobile-view",
499        r = ".aem-widget__breadcrumbs-item",
500        c = ".aem-widget__breadcrumbs-item-link",
501        e = document.querySelector(a).querySelector(n),
502        s = e.querySelectorAll(r);
503    if (s.length <= 3) return;
504    const t = Array.from(s.values()),
505        u = t.slice(0, 2),
506        E = t[t.length - 1],
507        d = t[0].cloneNode(!0),
508        i = d.querySelector(c),
509        l = c.replace(".", "") + "_show-more";
510    i.classList.add(l), i.innerHTML = "";
511    const S = [...u, d, E];
512    e.innerHTML = "", e.append(...S);
513    const m = _ => {
514        _.preventDefault(), _.target.matches(`.${l}`) && (e.innerHTML = "", e.append(...t), e.removeEventListener("click", m))
515    };
516    e.addEventListener("click", m)
517}
518document.addEventListener("DOMContentLoaded", () => {
519    /*g(),*/ A(),setImageHeight();
520});
521// This is just a sample script. Paste your real code (javascript or HTML) here.
522//TODO: what is this for?
523//if ('this_is' == /an_example/) {
524//    of_beautifier();
525//} else {
526//    var a = b ? (c % d) : e[f];
527//}
528
529function setImageHeight() {
530    let banner_content = document.getElementsByClassName('aem-widget__banner-box');
531    let requiredElement = banner_content[0];
532    let contentHeight = requiredElement ? requiredElement.offsetHeight : 0;
533    contentHeight = contentHeight + 128;
534    let imageHeight = contentHeight+ "px";
535    let image_elem = document.getElementsByClassName('aem-widget__banner-image');
536    let imageElement = image_elem[0];
537    if(window.innerWidth > 1000 && imageElement)    {
538        imageElement.style.height = imageHeight;
539    }
540
541
542
543}
544
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546/**!
547 * @fileOverview Kickass library to create and place poppers near their reference elements.
548 * @version 1.12.5
549 * @license
550 * Copyright (c) 2016 Federico Zivolo and contributors
551 *
552 * Permission is hereby granted, free of charge, to any person obtaining a copy
553 * of this software and associated documentation files (the "Software"), to deal
554 * in the Software without restriction, including without limitation the rights
555 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
556 * copies of the Software, and to permit persons to whom the Software is
557 * furnished to do so, subject to the following conditions:
558 *
559 * The above copyright notice and this permission notice shall be included in all
560 * copies or substantial portions of the Software.
561 *
562 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
563 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
564 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
565 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
566 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
567 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
568 * SOFTWARE.
569 */
570(function (global, factory) {
571	typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
572	typeof define === 'function' && define.amd ? define(factory) :
573	(global.Popper = factory());
574}(this, (function () { 'use strict';
575
576var nativeHints = ['native code', '[object MutationObserverConstructor]'];
577
578/**
579 * Determine if a function is implemented natively (as opposed to a polyfill).
580 * @method
581 * @memberof Popper.Utils
582 * @argument {Function | undefined} fn the function to check
583 * @returns {Boolean}
584 */
585var isNative = (function (fn) {
586  return nativeHints.some(function (hint) {
587    return (fn || '').toString().indexOf(hint) > -1;
588  });
589});
590
591var isBrowser = typeof window !== 'undefined';
592var longerTimeoutBrowsers = ['Edge', 'Trident', 'Firefox'];
593var timeoutDuration = 0;
594for (var i = 0; i < longerTimeoutBrowsers.length; i += 1) {
595  if (isBrowser && navigator.userAgent.indexOf(longerTimeoutBrowsers[i]) >= 0) {
596    timeoutDuration = 1;
597    break;
598  }
599}
600
601function microtaskDebounce(fn) {
602  var scheduled = false;
603  var i = 0;
604  var elem = document.createElement('span');
605
606  // MutationObserver provides a mechanism for scheduling microtasks, which
607  // are scheduled *before* the next task. This gives us a way to debounce
608  // a function but ensure it's called *before* the next paint.
609  var observer = new MutationObserver(function () {
610    fn();
611    scheduled = false;
612  });
613
614  observer.observe(elem, { attributes: true });

615
616  return function () {
617    if (!scheduled) {
618      scheduled = true;
619      elem.setAttribute('x-index', i);
620      i = i + 1; // don't use compund (+=) because it doesn't get optimized in V8
621    }
622  };
623}
624
625function taskDebounce(fn) {
626  var scheduled = false;
627  return function () {
628    if (!scheduled) {
629      scheduled = true;
630      setTimeout(function () {
631        scheduled = false;
632        fn();
633      }, timeoutDuration);
634    }
635  };
636}
637
638// It's common for MutationObserver polyfills to be seen in the wild, however
639// these rely on Mutation Events which only occur when an element is connected
640// to the DOM. The algorithm used in this module does not use a connected element,
641// and so we must ensure that a *native* MutationObserver is available.
642var supportsNativeMutationObserver = isBrowser && isNative(window.MutationObserver);
643
644/**
645* Create a debounced version of a method, that's asynchronously deferred
646* but called in the minimum time possible.
647*
648* @method
649* @memberof Popper.Utils
650* @argument {Function} fn
651* @returns {Function}
652*/
653var debounce = supportsNativeMutationObserver ? microtaskDebounce : taskDebounce;
654
655/**
656 * Check if the given variable is a function
657 * @method
658 * @memberof Popper.Utils
659 * @argument {Any} functionToCheck - variable to check
660 * @returns {Boolean} answer to: is a function?
661 */
662function isFunction(functionToCheck) {
663  var getType = {};
664  return functionToCheck && getType.toString.call(functionToCheck) === '[object Function]';
665}
666
667/**
668 * Get CSS computed property of the given element
669 * @method
670 * @memberof Popper.Utils
671 * @argument {Eement} element
672 * @argument {String} property
673 */
674function getStyleComputedProperty(element, property) {
675  if (element.nodeType !== 1) {
676    return [];
677  }
678  // NOTE: 1 DOM access here
679  var css = window.getComputedStyle(element, null);
680  return property ? css[property] : css;
681}
682
683/**
684 * Returns the parentNode or the host of the element
685 * @method
686 * @memberof Popper.Utils
687 * @argument {Element} element
688 * @returns {Element} parent
689 */
690function getParentNode(element) {
691  if (element.nodeName === 'HTML') {
692    return element;
693  }
694  return element.parentNode || element.host;
695}
696
697/**
698 * Returns the scrolling parent of the given element
699 * @method
700 * @memberof Popper.Utils
701 * @argument {Element} element
702 * @returns {Element} scroll parent
703 */
704function getScrollParent(element) {
705  // Return body, `getScroll` will take care to get the correct `scrollTop` from it
706  if (!element || ['HTML', 'BODY', '#document'].indexOf(element.nodeName) !== -1) {
707    return window.document.body;
708  }
709
710  // Firefox want us to check `-x` and `-y` variations as well
711
712  var _getStyleComputedProp = getStyleComputedProperty(element),
713      overflow = _getStyleComputedProp.overflow,
714      overflowX = _getStyleComputedProp.overflowX,
715      overflowY = _getStyleComputedProp.overflowY;
716
717  if (/(auto|scroll)/.test(overflow + overflowY + overflowX)) {
718    return element;
719  }
720
721  return getScrollParent(getParentNode(element));
722}
723
724/**
725 * Returns the offset parent of the given element
726 * @method
727 * @memberof Popper.Utils
728 * @argument {Element} element
729 * @returns {Element} offset parent
730 */
731function getOffsetParent(element) {
732  // NOTE: 1 DOM access here
733  var offsetParent = element && element.offsetParent;
734  var nodeName = offsetParent && offsetParent.nodeName;
735
736  if (!nodeName || nodeName === 'BODY' || nodeName === 'HTML') {
737    return window.document.documentElement;
738  }
739
740  // .offsetParent will return the closest TD or TABLE in case
741  // no offsetParent is present, I hate this job...
742  if (['TD', 'TABLE'].indexOf(offsetParent.nodeName) !== -1 && getStyleComputedProperty(offsetParent, 'position') === 'static') {
743    return getOffsetParent(offsetParent);
744  }
745
746  return offsetParent;
747}
748
749function isOffsetContainer(element) {
750  var nodeName = element.nodeName;
751
752  if (nodeName === 'BODY') {
753    return false;
754  }
755  return nodeName === 'HTML' || getOffsetParent(element.firstElementChild) === element;
756}
757
758/**
759 * Finds the root node (document, shadowDOM root) of the given element
760 * @method
761 * @memberof Popper.Utils
762 * @argument {Element} node
763 * @returns {Element} root node
764 */
765function getRoot(node) {
766  if (node.parentNode !== null) {
767    return getRoot(node.parentNode);
768  }
769
770  return node;
771}
772
773/**
774 * Finds the offset parent common to the two provided nodes
775 * @method
776 * @memberof Popper.Utils
777 * @argument {Element} element1
778 * @argument {Element} element2
779 * @returns {Element} common offset parent
780 */
781function findCommonOffsetParent(element1, element2) {
782  // This check is needed to avoid errors in case one of the elements isn't defined for any reason
783  if (!element1 || !element1.nodeType || !element2 || !element2.nodeType) {
784    return window.document.documentElement;
785  }
786
787  // Here we make sure to give as "start" the element that comes first in the DOM
788  var order = element1.compareDocumentPosition(element2) & Node.DOCUMENT_POSITION_FOLLOWING;
789  var start = order ? element1 : element2;
790  var end = order ? element2 : element1;
791
792  // Get common ancestor container
793  var range = document.createRange();
794  range.setStart(start, 0);
795  range.setEnd(end, 0);
796  var commonAncestorContainer = range.commonAncestorContainer;
797

798  // Both nodes are inside #document
799
800  if (element1 !== commonAncestorContainer && element2 !== commonAncestorContainer || start.contains(end)) {
801    if (isOffsetContainer(commonAncestorContainer)) {
802      return commonAncestorContainer;
803    }
804
805    return getOffsetParent(commonAncestorContainer);
806  }
807
808  // one of the nodes is inside shadowDOM, find which one
809  var element1root = getRoot(element1);
810  if (element1root.host) {
811    return findCommonOffsetParent(element1root.host, element2);
812  } else {
813    return findCommonOffsetParent(element1, getRoot(element2).host);
814  }
815}
816
817/**
818 * Gets the scroll value of the given element in the given side (top and left)
819 * @method
820 * @memberof Popper.Utils
821 * @argument {Element} element
822 * @argument {String} side `top` or `left`
823 * @returns {number} amount of scrolled pixels
824 */
825function getScroll(element) {
826  var side = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 'top';
827
828  var upperSide = side === 'top' ? 'scrollTop' : 'scrollLeft';
829  var nodeName = element.nodeName;
830
831  if (nodeName === 'BODY' || nodeName === 'HTML') {
832    var html = window.document.documentElement;
833    var scrollingElement = window.document.scrollingElement || html;
834    return scrollingElement[upperSide];
835  }
836
837  return element[upperSide];
838}
839
840/*
841 * Sum or subtract the element scroll values (left and top) from a given rect object
842 * @method
843 * @memberof Popper.Utils
844 * @param {Object} rect - Rect object you want to change
845 * @param {HTMLElement} element - The element from the function reads the scroll values
846 * @param {Boolean} subtract - set to true if you want to subtract the scroll values
847 * @return {Object} rect - The modifier rect object
848 */
849function includeScroll(rect, element) {
850  var subtract = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : false;
851
852  var scrollTop = getScroll(element, 'top');
853  var scrollLeft = getScroll(element, 'left');
854  var modifier = subtract ? -1 : 1;
855  rect.top += scrollTop * modifier;
856  rect.bottom += scrollTop * modifier;
857  rect.left += scrollLeft * modifier;
858  rect.right += scrollLeft * modifier;
859  return rect;
860}
861
862/*
863 * Helper to detect borders of a given element
864 * @method
865 * @memberof Popper.Utils
866 * @param {CSSStyleDeclaration} styles
867 * Result of `getStyleComputedProperty` on the given element
868 * @param {String} axis - `x` or `y`
869 * @return {number} borders - The borders size of the given axis
870 */
871
872function getBordersSize(styles, axis) {
873  var sideA = axis === 'x' ? 'Left' : 'Top';
874  var sideB = sideA === 'Left' ? 'Right' : 'Bottom';
875
876  return +styles['border' + sideA + 'Width'].split('px')[0] + +styles['border' + sideB + 'Width'].split('px')[0];
877}
878
879/**
880 * Tells if you are running Internet Explorer 10
881 * @method
882 * @memberof Popper.Utils
883 * @returns {Boolean} isIE10
884 */
885var isIE10 = undefined;
886
887var isIE10$1 = function () {
888  if (isIE10 === undefined) {
889    isIE10 = navigator.appVersion.indexOf('MSIE 10') !== -1;
890  }
891  return isIE10;
892};
893
894function getSize(axis, body, html, computedStyle) {
895  return Math.max(body['offset' + axis], body['scroll' + axis], html['client' + axis], html['offset' + axis], html['scroll' + axis], isIE10$1() ? html['offset' + axis] + computedStyle['margin' + (axis === 'Height' ? 'Top' : 'Left')] + computedStyle['margin' + (axis === 'Height' ? 'Bottom' : 'Right')] : 0);
896}
897
898function getWindowSizes() {
899  var body = window.document.body;
900  var html = window.document.documentElement;
901  var computedStyle = isIE10$1() && window.getComputedStyle(html);
902
903  return {
904    height: getSize('Height', body, html, computedStyle),
905    width: getSize('Width', body, html, computedStyle)
906  };
907}
908
909var classCallCheck = function (instance, Constructor) {
910  if (!(instance instanceof Constructor)) {
911    throw new TypeError("Cannot call a class as a function");
912  }
913};
914
915var createClass = function () {
916  function defineProperties(target, props) {
917    for (var i = 0; i < props.length; i++) {
918      var descriptor = props[i];
919      descriptor.enumerable = descriptor.enumerable || false;
920      descriptor.configurable = true;
921      if ("value" in descriptor) descriptor.writable = true;
922      Object.defineProperty(target, descriptor.key, descriptor);
923    }
924  }
925
926  return function (Constructor, protoProps, staticProps) {
927    if (protoProps) defineProperties(Constructor.prototype, protoProps);
928    if (staticProps) defineProperties(Constructor, staticProps);
929    return Constructor;
930  };
931}();
932
933
934
935
936
937var defineProperty = function (obj, key, value) {
938  if (key in obj) {
939    Object.defineProperty(obj, key, {
940      value: value,
941      enumerable: true,
942      configurable: true,
943      writable: true
944    });

945  } else {
946    obj[key] = value;
947  }
948
949  return obj;
950};
951
952var _extends = Object.assign || function (target) {
953  for (var i = 1; i < arguments.length; i++) {
954    var source = arguments[i];
955
956    for (var key in source) {
957      if (Object.prototype.hasOwnProperty.call(source, key)) {
958        target[key] = source[key];
959      }
960    }
961  }
962
963  return target;
964};
965
966/**
967 * Given element offsets, generate an output similar to getBoundingClientRect
968 * @method
969 * @memberof Popper.Utils
970 * @argument {Object} offsets
971 * @returns {Object} ClientRect like output
972 */
973function getClientRect(offsets) {
974  return _extends({}, offsets, {
975    right: offsets.left + offsets.width,
976    bottom: offsets.top + offsets.height
977  });
978}
979
980/**
981 * Get bounding client rect of given element
982 * @method
983 * @memberof Popper.Utils
984 * @param {HTMLElement} element
985 * @return {Object} client rect
986 */
987function getBoundingClientRect(element) {
988  var rect = {};
989
990  // IE10 10 FIX: Please, don't ask, the element isn't
991  // considered in DOM in some circumstances...
992  // This isn't reproducible in IE10 compatibility mode of IE11
993  if (isIE10$1()) {
994    try {
995      rect = element.getBoundingClientRect();
996      var scrollTop = getScroll(element, 'top');
997      var scrollLeft = getScroll(element, 'left');
998      rect.top += scrollTop;
999      rect.left += scrollLeft;
1000      rect.bottom += scrollTop;
1001      rect.right += scrollLeft;
1002    } catch (err) {}
1003  } else {
1004    rect = element.getBoundingClientRect();
1005  }
1006
1007  var result = {
1008    left: rect.left,
1009    top: rect.top,
1010    width: rect.right - rect.left,
1011    height: rect.bottom - rect.top
1012  };
1013
1014  // subtract scrollbar size from sizes
1015  var sizes = element.nodeName === 'HTML' ? getWindowSizes() : {};
1016  var width = sizes.width || element.clientWidth || result.right - result.left;
1017  var height = sizes.height || element.clientHeight || result.bottom - result.top;
1018
1019  var horizScrollbar = element.offsetWidth - width;
1020  var vertScrollbar = element.offsetHeight - height;
1021
1022  // if an hypothetical scrollbar is detected, we must be sure it's not a `border`
1023  // we make this check conditional for performance reasons
1024  if (horizScrollbar || vertScrollbar) {
1025    var styles = getStyleComputedProperty(element);
1026    horizScrollbar -= getBordersSize(styles, 'x');
1027    vertScrollbar -= getBordersSize(styles, 'y');
1028
1029    result.width -= horizScrollbar;
1030    result.height -= vertScrollbar;
1031  }
1032
1033  return getClientRect(result);
1034}
1035
1036function getOffsetRectRelativeToArbitraryNode(children, parent) {
1037  var isIE10 = isIE10$1();
1038  var isHTML = parent.nodeName === 'HTML';
1039  var childrenRect = getBoundingClientRect(children);
1040  var parentRect = getBoundingClientRect(parent);
1041  var scrollParent = getScrollParent(children);
1042
1043  var styles = getStyleComputedProperty(parent);
1044  var borderTopWidth = +styles.borderTopWidth.split('px')[0];
1045  var borderLeftWidth = +styles.borderLeftWidth.split('px')[0];
1046
1047  var offsets = getClientRect({
1048    top: childrenRect.top - parentRect.top - borderTopWidth,
1049    left: childrenRect.left - parentRect.left - borderLeftWidth,
1050    width: childrenRect.width,
1051    height: childrenRect.height
1052  });
1053  offsets.marginTop = 0;
1054  offsets.marginLeft = 0;
1055
1056  // Subtract margins of documentElement in case it's being used as parent
1057  // we do this only on HTML because it's the only element that behaves
1058  // differently when margins are applied to it. The margins are included in
1059  // the box of the documentElement, in the other cases not.
1060  if (!isIE10 && isHTML) {
1061    var marginTop = +styles.marginTop.split('px')[0];
1062    var marginLeft = +styles.marginLeft.split('px')[0];
1063
1064    offsets.top -= borderTopWidth - marginTop;
1065    offsets.bottom -= borderTopWidth - marginTop;
1066    offsets.left -= borderLeftWidth - marginLeft;
1067    offsets.right -= borderLeftWidth - marginLeft;
1068
1069    // Attach marginTop and marginLeft because in some circumstances we may need them
1070    offsets.marginTop = marginTop;
1071    offsets.marginLeft = marginLeft;
1072  }
1073
1074  if (isIE10 ? parent.contains(scrollParent) : parent === scrollParent && scrollParent.nodeName !== 'BODY') {
1075    offsets = includeScroll(offsets, parent);
1076  }
1077
1078  return offsets;
1079}
1080
1081function getViewportOffsetRectRelativeToArtbitraryNode(element) {
1082  var html = window.document.documentElement;
1083  var relativeOffset = getOffsetRectRelativeToArbitraryNode(element, html);
1084  var width = Math.max(html.clientWidth, window.innerWidth || 0);
1085  var height = Math.max(html.clientHeight, window.innerHeight || 0

1085);
1086
1087  var scrollTop = getScroll(html);
1088  var scrollLeft = getScroll(html, 'left');
1089
1090  var offset = {
1091    top: scrollTop - relativeOffset.top + relativeOffset.marginTop,
1092    left: scrollLeft - relativeOffset.left + relativeOffset.marginLeft,
1093    width: width,
1094    height: height
1095  };
1096
1097  return getClientRect(offset);
1098}
1099
1100/**
1101 * Check if the given element is fixed or is inside a fixed parent
1102 * @method
1103 * @memberof Popper.Utils
1104 * @argument {Element} element
1105 * @argument {Element} customContainer
1106 * @returns {Boolean} answer to "isFixed?"
1107 */
1108function isFixed(element) {
1109  var nodeName = element.nodeName;
1110  if (nodeName === 'BODY' || nodeName === 'HTML') {
1111    return false;
1112  }
1113  if (getStyleComputedProperty(element, 'position') === 'fixed') {
1114    return true;
1115  }
1116  return isFixed(getParentNode(element));
1117}
1118
1119/**
1120 * Computed the boundaries limits and return them
1121 * @method
1122 * @memberof Popper.Utils
1123 * @param {HTMLElement} popper
1124 * @param {HTMLElement} reference
1125 * @param {number} padding
1126 * @param {HTMLElement} boundariesElement - Element used to define the boundaries
1127 * @returns {Object} Coordinates of the boundaries
1128 */
1129function getBoundaries(popper, reference, padding, boundariesElement) {
1130  // NOTE: 1 DOM access here
1131  var boundaries = { top: 0, left: 0 };
1132  var offsetParent = findCommonOffsetParent(popper, reference);
1133
1134  // Handle viewport case
1135  if (boundariesElement === 'viewport') {
1136    boundaries = getViewportOffsetRectRelativeToArtbitraryNode(offsetParent);
1137  } else {
1138    // Handle other cases based on DOM element used as boundaries
1139    var boundariesNode = void 0;
1140    if (boundariesElement === 'scrollParent') {
1141      boundariesNode = getScrollParent(getParentNode(popper));
1142      if (boundariesNode.nodeName === 'BODY') {
1143        boundariesNode = window.document.documentElement;
1144      }
1145    } else if (boundariesElement === 'window') {
1146      boundariesNode = window.document.documentElement;
1147    } else {
1148      boundariesNode = boundariesElement;
1149    }
1150
1151    var offsets = getOffsetRectRelativeToArbitraryNode(boundariesNode, offsetParent);
1152
1153    // In case of HTML, we need a different computation
1154    if (boundariesNode.nodeName === 'HTML' && !isFixed(offsetParent)) {
1155      var _getWindowSizes = getWindowSizes(),
1156          height = _getWindowSizes.height,
1157          width = _getWindowSizes.width;
1158
1159      boundaries.top += offsets.top - offsets.marginTop;
1160      boundaries.bottom = height + offsets.top;
1161      boundaries.left += offsets.left - offsets.marginLeft;
1162      boundaries.right = width + offsets.left;
1163    } else {
1164      // for all the other DOM elements, this one is good
1165      boundaries = offsets;
1166    }
1167  }
1168
1169  // Add paddings
1170  boundaries.left += padding;
1171  boundaries.top += padding;
1172  boundaries.right -= padding;
1173  boundaries.bottom -= padding;
1174
1175  return boundaries;
1176}
1177
1178function getArea(_ref) {
1179  var width = _ref.width,
1180      height = _ref.height;
1181
1182  return width * height;
1183}
1184
1185/**
1186 * Utility used to transform the `auto` placement to the placement with more
1187 * available space.
1188 * @method
1189 * @memberof Popper.Utils
1190 * @argument {Object} data - The data object generated by update method
1191 * @argument {Object} options - Modifiers configuration and options
1192 * @returns {Object} The data object, properly modified
1193 */
1194function computeAutoPlacement(placement, refRect, popper, reference, boundariesElement) {
1195  var padding = arguments.length > 5 && arguments[5] !== undefined ? arguments[5] : 0;
1196
1197  if (placement.indexOf('auto') === -1) {
1198    return placement;
1199  }
1200
1201  var boundaries = getBoundaries(popper, reference, padding, boundariesElement);
1202
1203  var rects = {
1204    top: {
1205      width: boundaries.width,
1206      height: refRect.top - boundaries.top
1207    },
1208    right: {
1209      width: boundaries.right - refRect.right,
1210      height: boundaries.height
1211    },
1212    bottom: {
1213      width: boundaries.width,
1214      height: boundaries.bottom - refRect.bottom
1215    },
1216    left: {
1217      width: refRect.left - boundaries.left,
1218      height: boundaries.height
1219    }
1220  };
1221
1222  var sortedAreas = Object.keys(rects).map(function (key) {
1223    return _extends({
1224      key: key
1225    }, rects[key], {
1226      area: getArea(rects[key])
1227    });

1228  }).sort(function (a, b) {
1229    return b.area - a.area;
1230  });
1231
1232  var filteredAreas = sortedAreas.filter(function (_ref2) {
1233    var width = _ref2.width,
1234        height = _ref2.height;
1235    return width >= popper.clientWidth && height >= popper.clientHeight;
1236  });
1237
1238  var computedPlacement = filteredAreas.length > 0 ? filteredAreas[0].key : sortedAreas[0].key;
1239
1240  var variation = placement.split('-')[1];
1241
1242  return computedPlacement + (variation ? '-' + variation : '');
1243}
1244
1245/**
1246 * Get offsets to the reference element
1247 * @method
1248 * @memberof Popper.Utils
1249 * @param {Object} state
1250 * @param {Element} popper - the popper element
1251 * @param {Element} reference - the reference element (the popper will be relative to this)
1252 * @returns {Object} An object containing the offsets which will be applied to the popper
1253 */
1254function getReferenceOffsets(state, popper, reference) {
1255  var commonOffsetParent = findCommonOffsetParent(popper, reference);
1256  return getOffsetRectRelativeToArbitraryNode(reference, commonOffsetParent);
1257}
1258
1259/**
1260 * Get the outer sizes of the given element (offset size + margins)
1261 * @method
1262 * @memberof Popper.Utils
1263 * @argument {Element} element
1264 * @returns {Object}

1264 object containing width and height properties
1265 */
1266function getOuterSizes(element) {
1267  var styles = window.getComputedStyle(element);
1268  var x = parseFloat(styles.marginTop) + parseFloat(styles.marginBottom);
1269  var y = parseFloat(styles.marginLeft) + parseFloat(styles.marginRight);
1270  var result = {
1271    width: element.offsetWidth + y,
1272    height: element.offsetHeight + x
1273  };
1274  return result;
1275}
1276
1277/**
1278 * Get the opposite placement of the given one
1279 * @method
1280 * @memberof Popper.Utils
1281 * @argument {String} placement
1282 * @returns {String} flipped placement
1283 */
1284function getOppositePlacement(placement) {
1285  var hash = { left: 'right', right: 'left', bottom: 'top', top: 'bottom' };
1286  return placement.replace(/left|right|bottom|top/g, function (matched) {
1287    return hash[matched];
1288  });
1289}
1290
1291/**
1292 * Get offsets to the popper
1293 * @method
1294 * @memberof Popper.Utils
1295 * @param {Object} position - CSS position the Popper will get applied
1296 * @param {HTMLElement} popper - the popper element
1297 * @param {Object} referenceOffsets - the reference offsets (the popper will be relative to this)
1298 * @param {String} placement - one of the valid placement options
1299 * @returns {Object} popperOffsets - An object containing the offsets which will be applied to the popper
1300 */
1301function getPopperOffsets(popper, referenceOffsets, placement) {
1302  placement = placement.split('-')[0];
1303
1304  // Get popper node sizes
1305  var popperRect = getOuterSizes(popper);
1306
1307  // Add position, width and height to our offsets object
1308  var popperOffsets = {
1309    width: popperRect.width,
1310    height: popperRect.height
1311  };
1312
1313  // depending by the popper placement we have to compute its offsets slightly differently
1314  var isHoriz = ['right', 'left'].indexOf(placement) !== -1;
1315  var mainSide = isHoriz ? 'top' : 'left';
1316  var secondarySide = isHoriz ? 'left' : 'top';
1317  var measurement = isHoriz ? 'height' : 'width';
1318  var secondaryMeasurement = !isHoriz ? 'height' : 'width';
1319
1320  popperOffsets[mainSide] = referenceOffsets[mainSide] + referenceOffsets[measurement] / 2 - popperRect[measurement] / 2;
1321  if (placement === secondarySide) {
1322    popperOffsets[secondarySide] = referenceOffsets[secondarySide] - popperRect[secondaryMeasurement];
1323  } else {
1324    popperOffsets[secondarySide] = referenceOffsets[getOppositePlacement(secondarySide)];
1325  }
1326
1327  return popperOffsets;
1328}
1329
1330/**
1331 * Mimics the `find` method of Array
1332 * @method
1333 * @memberof Popper.Utils
1334 * @argument {Array} arr
1335 * @argument prop
1336 * @argument value
1337 * @returns index or -1
1338 */
1339function find(arr, check) {
1340  // use native find if supported
1341  if (Array.prototype.find) {
1342    return arr.find(check);
1343  }
1344
1345  // use `filter` to obtain the same behavior of `find`
1346  return arr.filter(check)[0];
1347}
1348
1349/**
1350 * Return the index of the matching object
1351 * @method
1352 * @memberof Popper.Utils
1353 * @argument {Array} arr
1354 * @argument prop
1355 * @argument value
1356 * @returns index or -1
1357 */
1358function findIndex(arr, prop, value) {
1359  // use native findIndex if supported
1360  if (Array.prototype.findIndex) {
1361    return arr.findIndex(function (cur) {
1362      return cur[prop] === value;
1363    });
1364  }
1365
1366  // use `find` + `indexOf` if `findIndex` isn't supported
1367  var match = find(arr, function (obj) {
1368    return obj[prop] === value;
1369  });
1370  return arr.indexOf(match);
1371}
1372
1373/**
1374 * Loop trough the list of modifiers and run them in order,
1375 * each of them will then edit the data object.
1376 * @method
1377 * @memberof Popper.Utils
1378 * @param {dataObject} data
1379 * @param {Array} modifiers
1380 * @param {String} ends - Optional modifier name used as stopper
1381 * @returns {dataObject}
1382 */
1383function runModifiers(modifiers, data, ends) {
1384  var modifiersToRun = ends === undefined ? modifiers : modifiers.slice(0, findIndex(modifiers, 'name', ends));
1385
1386  modifiersToRun.forEach(function (modifier) {
1387    if (modifier.function) {
1388      console.warn('`modifier.function` is deprecated, use `modifier.fn`!');
1389    }
1390    var fn = modifier.function || modifier.fn;
1391    if (modifier.enabled && isFunction(fn)) {
1392      // Add properties to offsets to make them a complete clientRect object
1393      // we do this before each modifier to make sure the previous one doesn't
1394      // mess with these values
1395      data.offsets.popper = getClientRect(data.offsets.popper);
1396      data.offsets.reference = getClientRect(data.offsets.reference);
1397
1398      data = fn(data, modifier);
1399    }
1400  });
1401
1402  return data;
1403}
1404
1405/**
1406 * Updates the position of the popper, computing the new offsets and applying
1407 * the new style.<br />
1408 * Prefer `scheduleUpdate` over `update` because of performance reasons.
1409 * @method
1410 * @memberof Popper
1411 */

1412function update() {
1413  // if popper is destroyed, don't perform any further update
1414  if (this.state.isDestroyed) {
1415    return;
1416  }
1417
1418  var data = {
1419    instance: this,
1420    styles: {},
1421    arrowStyles: {},
1422    attributes: {},
1423    flipped: false,
1424    offsets: {}
1425  };
1426
1427  // compute reference element offsets
1428  data.offsets.reference = getReferenceOffsets(this.state, this.popper, this.reference);
1429
1430  // compute auto placement, store placement inside the data object,
1431  // modifiers will be able to edit `placement` if needed
1432  // and refer to originalPlacement to know the original value
1433  data.placement = computeAutoPlacement(this.options.placement, data.offsets.reference, this.popper, this.reference, this.options.modifiers.flip.boundariesElement, this.options.modifiers.flip.padding);
1434
1435  // store the computed placement inside `originalPlacement`
1436  data.originalPlacement = data.placement;
1437
1438  // compute the popper offsets
1439  data.offsets.popper = getPopperOffsets(this.popper, data.offsets.reference, data.placement);
1440  data.offsets.popper.position = 'absolute';
1441
1442  // run the modifiers
1443  data = runModifiers(this.modifiers, data);
1444
1445  // the first `update` will call `onCreate` callback
1446  // the other ones will call `onUpdate` callback
1447  if (!this.state.isCreated) {
1448    this.state.isCreated = true;
1449    this.options.onCreate(data);
1450  } else {
1451    this.options.onUpdate(data);
1452  }
1453}
1454
1455/**
1456 * Helper used to know if the given modifier is enabled.
1457 * @method
1458 * @memberof Popper.Utils
1459 * @returns {Boolean}
1460 */
1461function isModifierEnabled(modifiers, modifierName) {
1462  return modifiers.some(function (_ref) {
1463    var name = _ref.name,
1464        enabled = _ref.enabled;
1465    return enabled && name === modifierName;
1466  });
1467}
1468
1469/**
1470 * Get the prefixed supported property name
1471 * @method
1472 * @memberof Popper.Utils
1473 * @argument {String} property (camelCase)
1474 * @returns {String} prefixed property (camelCase or PascalCase, depending on the vendor prefix)
1475 */
1476function getSupportedPropertyName(property) {
1477  var prefixes = [false, 'ms', 'Webkit', 'Moz', 'O'];
1478  var upperProp = property.charAt(0).toUpperCase() + property.slice(1);
1479
1480  for (var i = 0; i < prefixes.length - 1; i++) {
1481    var prefix = prefixes[i];
1482    var toCheck = prefix ? '' + prefix + upperProp : property;
1483    if (typeof window.document.body.style[toCheck] !== 'undefined') {
1484      return toCheck;
1485    }
1486  }
1487  return null;
1488}
1489
1490/**
1491 * Destroy the popper
1492 * @method
1493 * @memberof Popper
1494 */
1495function destroy() {
1496  this.state.isDestroyed = true;
1497
1498  // touch DOM only if `applyStyle` modifier is enabled
1499  if (isModifierEnabled(this.modifiers, 'applyStyle')) {
1500    this.popper.removeAttribute('x-placement');
1501    this.popper.style.left = '';
1502    this.popper.style.position = '';
1503    this.popper.style.top = '';
1504    this.popper.style[getSupportedPropertyName('transform')] = '';
1505  }
1506
1507  this.disableEventListeners();
1508
1509  // remove the popper if user explicity asked for the deletion on destroy
1510  // do not use `remove` because IE11 doesn't support it
1511  if (this.options.removeOnDestroy) {
1512    this.popper.parentNode.removeChild(this.popper);
1513  }
1514  return this;
1515}
1516
1517function attachToScrollParents(scrollParent, event, callback, scrollParents) {
1518  var isBody = scrollParent.nodeName === 'BODY';
1519  var target = isBody ? window : scrollParent;
1520  target.addEventListener(event, callback, { passive: true });
1521
1522  if (!isBody) {
1523    attachToScrollParents(getScrollParent(target.parentNode), event, callback, scrollParents);
1524  }
1525  scrollParents.push(target);
1526}
1527
1528/**
1529 * Setup needed event listeners used to update the popper position
1530 * @method
1531 * @memberof Popper.Utils
1532 * @private
1533 */
1534function setupEventListeners(reference, options, state, updateBound) {
1535  // Resize event listener on window
1536  state.updateBound = updateBound;
1537  window.addEventListener('resize', state.updateBound, { passive: true });
1538
1539  // Scroll event listener on scroll parents
1540  var scrollElement = getScrollParent(reference);
1541  attachToScrollParents(scrollElement, 'scroll', state.updateBound, state.scrollParents);
1542  state.scrollElement = scrollElement;
1543  state.eventsEnabled = true;
1544
1545  return state;
1546}
1547
1548/**
1549 * It will add resize/scroll events and start recalculating
1550 * position of the popper element when they are triggered.
1551 * @method
1552 * @memberof Popper
1553 */
1554function enableEventListeners() {
1555  if (!this.state.eventsEnabled) {
1556    this.state = setupEventListeners(this.reference, this.options, this.state, this.scheduleUpdate);
1557  }
1558}
1559
1560/**
1561 * Remove event listeners used to update the popper position
1562 * @method
1563 * @memberof Popper.Utils
1564 * @private
1565 */
1566function removeEventListeners(reference, state) {
1567  // Remove resize event listener on window
1568  window.removeEventListener('resize', state.updateBound);
1569
1570  // Remove scroll event listener on scroll parents

1571  state.scrollParents.forEach(function (target) {
1572    target.removeEventListener('scroll', state.updateBound);
1573  });
1574
1575  // Reset state
1576  state.updateBound = null;
1577  state.scrollParents = [];
1578  state.scrollElement = null;
1579  state.eventsEnabled = false;
1580  return state;
1581}
1582
1583/**
1584 * It will remove resize/scroll events and won't recalculate popper position
1585 * when they are triggered. It also won't trigger onUpdate callback anymore,
1586 * unless you call `update` method manually.
1587 * @method
1588 * @memberof Popper
1589 */
1590function disableEventListeners() {
1591  if (this.state.eventsEnabled) {
1592    window.cancelAnimationFrame(this.scheduleUpdate);
1593    this.state = removeEventListeners(this.reference, this.state);
1594  }
1595}
1596
1597/**
1598 * Tells if a given input is a number
1599 * @method
1600 * @memberof Popper.Utils
1601 * @param {*} input to check
1602 * @return {Boolean}
1603 */
1604function isNumeric(n) {
1605  return n !== '' && !isNaN(parseFloat(n)) && isFinite(n);
1606}
1607
1608/**
1609 * Set the style to the given popper
1610 * @method
1611 * @memberof Popper.Utils
1612 * @argument {Element} element - Element to apply the style to
1613 * @argument {Object} styles
1614 * Object with a list of properties and values which will be applied to the element
1615 */
1616function setStyles(element, styles) {
1617  Object.keys(styles).forEach(function (prop) {
1618    var unit = '';
1619    // add unit if the value is numeric and is one of the following
1620    if (['width', 'height', 'top', 'right', 'bottom', 'left'].indexOf(prop) !== -1 && isNumeric(styles[prop])) {
1621      unit = 'px';
1622    }
1623    element.style[prop] = styles[prop] + unit;
1624  });
1625}
1626
1627/**
1628 * Set the attributes to the given popper
1629 * @method
1630 * @memberof Popper.Utils
1631 * @argument {Element} element - Element to apply the attributes to
1632 * @argument {Object} styles
1633 * Object with a list of properties and values which will be applied to the element
1634 */
1635function setAttributes(element, attributes) {
1636  Object.keys(attributes).forEach(function (prop) {
1637    var value = attributes[prop];
1638    if (value !== false) {
1639      element.setAttribute(prop, attributes[prop]);
1640    } else {
1641      element.removeAttribute(prop);
1642    }
1643  });
1644}
1645
1646/**
1647 * @function
1648 * @memberof Modifiers
1649 * @argument {Object} data - The data object generated by `update` method
1650 * @argument {Object} data.styles - List of style properties - values to apply to popper element
1651 * @argument {Object} data.attributes - List of attribute properties - values to apply to popper element
1652 * @argument {Object} options - Modifiers configuration and options
1653 * @returns {Object} The same data object
1654 */
1655function applyStyle(data) {
1656  // any property present in `data.styles` will be applied to the popper,
1657  // in this way we can make the 3rd party modifiers add custom styles to it
1658  // Be aware, modifiers could override the properties defined in the previous
1659  // lines of this modifier!
1660  setStyles(data.instance.popper, data.styles);
1661
1662  // any property present in `data.attributes` will be applied to the popper,
1663  // they will be set as HTML attributes of the element
1664  setAttributes(data.instance.popper, data.attributes);
1665
1666  // if arrowElement is defined and arrowStyles has some properties

1667  if (data.arrowElement && Object.keys(data.arrowStyles).length) {
1668    setStyles(data.arrowElement, data.arrowStyles);
1669  }
1670
1671  return data;
1672}
1673
1674/**
1675 * Set the x-placement attribute before everything else because it could be used
1676 * to add margins to the popper margins needs to be calculated to get the
1677 * correct popper offsets.
1678 * @method
1679 * @memberof Popper.modifiers
1680 * @param {HTMLElement} reference - The reference element used to position the popper
1681 * @param {HTMLElement} popper - The HTML element used as popper.
1682 * @param {Object} options - Popper.js options
1683 */
1684function applyStyleOnLoad(reference, popper, options, modifierOptions, state) {
1685  // compute reference element offsets
1686  var referenceOffsets = getReferenceOffsets(state, popper, reference);
1687
1688  // compute auto placement, store placement inside the data object,
1689  // modifiers will be able to edit `placement` if needed
1690  // and refer to originalPlacement to know the original value
1691  var placement = computeAutoPlacement(options.placement, referenceOffsets, popper, reference, options.modifiers.flip.boundariesElement, options.modifiers.flip.padding);
1692
1693  popper.setAttribute('x-placement', placement);
1694
1695  // Apply `position` to popper before anything else because
1696  // without the position applied we can't guarantee correct computations
1697  setStyles(popper, { position: 'absolute' });
1698
1699  return options;
1700}
1701
1702/**
1703 * @function
1704 * @memberof Modifiers
1705 * @argument {Object} data - The data object generated by `update` method
1706 * @argument {Object} options - Modifiers configuration and options
1707 * @returns {Object} The data object, properly modified
1708 */
1709function computeStyle(data, options) {
1710  var x = options.x,
1711      y = options.y;

1712  var popper = data.offsets.popper;
1713
1714  // Remove this legacy support in Popper.js v2
1715
1716  var legacyGpuAccelerationOption = find(data.instance.modifiers, function (modifier) {
1717    return modifier.name === 'applyStyle';
1718  }).gpuAcceleration;
1719  if (legacyGpuAccelerationOption !== undefined) {
1720    console.warn('WARNING: `gpuAcceleration` option moved to `computeStyle` modifier and will not be supported in future versions of Popper.js!');
1721  }
1722  var gpuAcceleration = legacyGpuAccelerationOption !== undefined ? legacyGpuAccelerationOption : options.gpuAcceleration;
1723
1724  var offsetParent = getOffsetParent(data.instance.popper);
1725  var offsetParentRect = getBoundingClientRect(offsetParent);
1726
1727  // Styles
1728  var styles = {
1729    position: popper.position
1730  };
1731
1732  // floor sides to avoid blurry text
1733  var offsets = {
1734    left: Math.floor(popper.left),
1735    top: Math.floor(popper.top),
1736    bottom: Math.floor(popper.bottom),
1737    right: Math.floor(popper.right)
1738  };
1739
1740  var sideA = x === 'bottom' ? 'top' : 'bottom';
1741  var sideB = y === 'right' ? 'left' : 'right';
1742
1743  // if gpuAcceleration is set to `true` and transform is supported,
1744  //  we use `translate3d` to apply the position to the popper we
1745  // automatically use the supported prefixed version if needed
1746  var prefixedProperty = getSupportedPropertyName('transform');
1747
1748  // now, let's make a step back and look at this code closely (wtf?)
1749  // If the content of the popper grows once it's been positioned, it
1750  // may happen that the popper gets misplaced because of the new content
1751  // overflowing its reference element
1752  // To avoid this problem, we provide two options (x and y), which allow
1753  // the consumer to define the offset origin.
1754  // If we position a popper on top of a reference element, we can set
1755  // `x` to `top` to make the popper grow towards its top instead of
1756  // its bottom.
1757  var left = void 0,
1758      top = void 0;
1759  if (sideA === 'bottom') {
1760    top = -offsetParentRect.height + offsets.bottom;
1761  } else {
1762    top = offsets.top;
1763  }
1764  if (sideB === 'right') {
1765    left = -offsetParentRect.width + offsets.right;
1766  } else {
1767    left = offsets.left;
1768  }
1769  if (gpuAcceleration && prefixedProperty) {
1770    styles[prefixedProperty] = 'translate3d(' + left + 'px, ' + top + 'px, 0)';
1771    styles[sideA] = 0;
1772    styles[sideB] = 0;
1773    styles.willChange = 'transform';
1774  } else {
1775    // othwerise, we use the standard `top`, `left`, `bottom` and `right` properties
1776    var invertTop = sideA === 'bottom' ? -1 : 1;
1777    var invertLeft = sideB === 'right' ? -1 : 1;
1778    styles[sideA] = top * invertTop;
1779    styles[sideB] = left * invertLeft;
1780    styles.willChange = sideA + ', ' + sideB;
1781  }
1782
1783  // Attributes
1784  var attributes = {
1785    'x-placement': data.placement
1786  };
1787
1788  // Update `data` attributes, styles and arrowStyles
1789  data.attributes = _extends({}, attributes, data.attributes);
1790  data.styles = _extends({}, styles, data.styles);
1791  data.arrowStyles = _extends({}, data.offsets.arrow, data.arrowStyles);
1792
1793  return data;
1794}
1795
1796/**
1797 * Helper used to know if the given modifier depends from another one.<br />
1798 * It checks if the needed modifier is listed and enabled.
1799 * @method
1800 * @memberof Popper.Utils
1801 * @param {Array} modifiers - list of modifiers
1802 * @param {String} requestingName - name of requesting modifier
1803 * @param {String} requestedName - name of requested modifier
1804 * @returns {Boolean}
1805 */
1806function isModifierRequired(modifiers, requestingName, requestedName) {
1807  var requesting = find(modifiers, function (_ref) {
1808    var name = _ref.name;
1809    return name === requestingName;
1810  });
1811
1812  var isRequired = !!requesting && modifiers.some(function (modifier) {
1813    return modifier.name === requestedName && modifier.enabled && modifier.order < requesting.order;
1814  });
1815
1816  if (!isRequired) {
1817    var _requesting = '`' + requestingName + '`';
1818    var requested = '`' + requestedName + '`';
1819    console.warn(requested + ' modifier is required by ' + _requesting + ' modifier in order to work, be sure to include it before ' + _requesting + '!');
1820  }
1821  return isRequired;
1822}
1823
1824/**
1825 * @function
1826 * @memberof Modifiers
1827 * @argument {Object} data - The data object generated by update method
1828 * @argument {Object} options - Modifiers configuration and options
1829 * @returns {Object} The data object, properly modified
1830 */
1831function arrow(data, options) {
1832  // arrow depends on keepTogether in order to work
1833  if (!isModifierRequired(data.instance.modifiers, 'arrow', 'keepTogether')) {
1834    return data;
1835  }
1836
1837  var arrowElement = options.element;
1838

1839  // if arrowElement is a string, suppose it's a CSS selector
1840  if (typeof arrowElement === 'string') {
1841    arrowElement = data.instance.popper.querySelector(arrowElement);
1842
1843    // if arrowElement is not found, don't run the modifier
1844    if (!arrowElement) {
1845      return data;
1846    }
1847  } else {
1848    // if the arrowElement isn't a query selector we must check that the
1849    // provided DOM node is child of its popper node
1850    if (!data.instance.popper.contains(arrowElement)) {
1851      console.warn('WARNING: `arrow.element` must be child of its popper element!');
1852      return data;
1853    }
1854  }
1855
1856  var placement = data.placement.split('-')[0];
1857  var _data$offsets = data.offsets,
1858      popper = _data$offsets.popper,
1859      reference = _data$offsets.reference;
1860
1861  var isVertical = ['left', 'right'].indexOf(placement) !== -1;
1862
1863  var len = isVertical ? 'height' : 'width';
1864  var sideCapitalized = isVertical ? 'Top' : 'Left';
1865  var side = sideCapitalized.toLowerCase();
1866  var altSide = isVertical ? 'left' : 'top';
1867  var opSide = isVertical ? 'bottom' : 'right';
1868  var arrowElementSize = getOuterSizes(arrowElement)[len];
1869
1870  //
1871  // extends keepTogether behavior making sure the popper and its
1872  // reference have enough pixels in conjuction
1873  //
1874
1875  // top/left side
1876  if (reference[opSide] - arrowElementSize < popper[side]) {
1877    data.offsets.popper[side] -= popper[side] - (reference[opSide] - arrowElementSize);
1878  }
1879  // bottom/right side
1880  if (reference[side] + arrowElementSize > popper[opSide]) {
1881    data.offsets.popper[side] += reference[side] + arrowElementSize - popper[opSide];
1882  }
1883
1884  // compute center of the popper
1885  var center = reference[side] + reference[len] / 2 - arrowElementSize / 2;
1886
1887  // Compute the sideValue using the updated popper offsets
1888  // take popper margin in account because we don't have this info available
1889  var popperMarginSide = getStyleComputedProperty(data.instance.popper, 'margin' + sideCapitalized).replace('px', '');
1890  var sideValue = center - getClientRect(data.offsets.popper)[side] - popperMarginSide;
1891
1892  // prevent arrowElement from being placed not contiguously to its popper
1893  sideValue = Math.max(Math.min(popper[len] - arrowElementSize, sideValue), 0);
1894
1895  data.arrowElement = arrowElement;
1896  data.offsets.arrow = {};
1897  data.offsets.arrow[side] = Math.round(sideValue);
1898  data.offsets.arrow[altSide] = ''; // make sure to unset any eventual altSide value from the DOM node
1899
1900  return data;
1901}
1902
1903/**
1904 * Get the opposite placement variation of the given one
1905 * @method
1906 * @memberof Popper.Utils
1907 * @argument {String} placement variation
1908 * @returns {String} flipped placement variation
1909 */
1910function getOppositeVariation(variation) {
1911  if (variation === 'end') {
1912    return 'start';
1913  } else if (variation === 'start') {
1914    return 'end';
1915  }
1916  return variation;
1917}
1918
1919/**
1920 * List of accepted placements to use as values of the `placement` option.<br />
1921 * Valid placements are:
1922 * - `auto`
1923 * - `top`
1924 * - `right`
1925 * - `bottom`
1926 * - `left`
1927 *
1928 * Each placement can have a variation from this list:
1929 * - `-start`
1930 * - `-end`
1931 *
1932 * Variations are interpreted easily if you think of them as the left to right
1933 * written languages. Horizontally (`top` and `bottom`), `start` is left and `end`
1934 * is right.<br />
1935 * Vertically (`left` and `right`), `start` is top and `end` is bottom.
1936 *
1937 * Some valid examples are:
1938 * - `top-end` (on top of reference, right aligned)
1939 * - `right-start` (on right of reference, top aligned)
1940 * - `bottom` (on bottom, centered)
1941 * - `auto-right` (on the side with more space available, alignment depends by placement)
1942 *
1943 * @static
1944 * @type {Array}
1945 * @enum {String}
1946 * @readonly
1947 * @method placements
1948 * @memberof Popper
1949 */
1950var placements = ['auto-start', 'auto', 'auto-end', 'top-start', 'top', 'top-end', 'right-start', 'right', 'right-end', 'bottom-end', 'bottom', 'bottom-start', 'left-end', 'left', 'left-start'];
1951
1952// Get rid of `auto` `auto-start` and `auto-end`
1953var validPlacements = placements.slice(3);
1954
1955/**
1956 * Given an initial placement, returns all the subsequent placements
1957 * clockwise (or counter-clockwise).
1958 *
1959 * @method
1960 * @memberof Popper.Utils
1961 * @argument {String} placement - A valid placement (it accepts variations)
1962 * @argument {Boolean} counter - Set to true to walk the placements counterclockwise
1963 * @returns {Array} placements including their variations
1964 */
1965function clockwise(placement) {
1966  var counter = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;
1967
1968  var index = validPlacements.indexOf(placement);
1969  var arr = validPlacements.slice(index + 1).concat(validPlacements.slice(0, index));
1970  return counter ? arr.reverse() : arr;
1971}
1972
1973var BEHAVIORS = {
1974  FLIP: 'flip',
1975  CLOCKWISE: 'clockwise',
1976  COUNTERCLOCKWISE: 'counterclockwise'
1977};
1978
1979/**
1980 * @function
1981 * @memberof Modifiers
1982 * @argument {Object} data - The data object generated by update method
1983 * @argument {Object} options - Modifiers configuration and options
1984 * @returns {Object} The data object, properly modified
1985 */
1986function flip(data, options) {
1987  // if `inner` modifier is enabled, we can't use the `flip` modifier
1988  if (isModifierEnabled(data.instance.modifiers, 'inner')) {
1989    return data;
1990  }
1991
1992  if (data.flipped && data.placement === data.originalPlacement) {
1993    // seems like flip is trying to loop, probably there's not enough space on any of the flippable sides
1994    return data;
1995  }
1996
1997  var boundaries = getBoundaries(data.instance.popper, data.instance.reference, options.padding, options.boundariesElement);
1998
1999  var placement = data.placement.split('-')[0];
2000  var placementOpposite = getOppositePlacement(placement);
2001  var variation = data.placement.split('-')[1] || '';
2002
2003  var flipOrder = [];
2004
2005  switch (options.behavior) {
2006    case BEHAVIORS.FLIP:
2007      flipOrder = [placement, placementOpposite];
2008      break;
2009    case BEHAVIORS.CLOCKWISE:
2010      flipOrder = clockwise(placement);
2011      break;
2012    case BEHAVIORS.COUNTERCLOCKWISE:
2013      flipOrder = clockwise(placement, true);
2014      break;
2015    default:
2016      flipOrder = options.behavior;
2017  }
2018
2019  flipOrder.forEach(function (step, index) {
2020    if (placement !== step || flipOrder.length === index + 1) {
2021      return data;
2022    }
2023
2024    placement = data.placement.split('-')[0];
2025    placementOpposite = getOppositePlacement(placement);
2026
2027    var popperOffsets = data.offsets.popper;
2028    var refOffsets = data.offsets.reference;
2029
2030    // using floor because the reference offsets may contain decimals we are not going to consider here
2031    var floor = Math.floor;
2032    var overlapsRef = placement === 'left' && floor(popperOffsets.right) > floor(refOffsets.left) || placement === 'right' && floor(popperOffsets.left) < floor(refOffsets.right) || placement === 'top' && floor(popperOffsets.bottom) > floor(refOffsets.top) || placement === 'bottom' && floor(popperOffsets.top) < floor(refOffsets.bottom);
2033
2034    var overflowsLeft = floor(popperOffsets.left) < floor(boundaries.left);
2035    var overflowsRight = floor(popperOffsets.right) > floor(boundaries.right);
2036    var overflowsTop = floor(popperOffsets.top) < floor(boundaries.top);
2037    var overflowsBottom = floor(popperOffsets.bottom) > floor(boundaries.bottom);
2038
2039    var overflowsBoundaries = placement === 'left' && overflowsLeft || placement === 'right' && overflowsRight || placement === 'top' && overflowsTop || placement === 'bottom' && overflowsBottom;
2040
2041    // flip the variation if required
2042    var isVertical = ['top', 'bottom'].indexOf(placement) !== -1;
2043    var flippedVariation = !!options.flipVariations && (isVertical && variation === 'start' && overflowsLeft || isVertical && variation === 'end' && overflowsRight || !isVertical && variation === 'start' && overflowsTop || !isVertical && variation === 'end' && overflowsBottom);
2044
2045    if (overlapsRef || overflowsBoundaries || flippedVariation) {
2046      // this boolean to detect any flip loop
2047      data.flipped = true;
2048
2049      if (overlapsRef || overflowsBoundaries) {
2050        placement = flipOrder[index + 1];
2051      }
2052
2053      if (flippedVariation) {
2054        variation = getOppositeVariation(variation);
2055      }
2056
2057      data.placement = placement + (variation ? '-' + variation : '');
2058

2059      // this object contains `position`, we want to preserve it along with
2060      // any additional property we may add in the future
2061      data.offsets.popper = _extends({}, data.offsets.popper, getPopperOffsets(data.instance.popper, data.offsets.reference, data.placement));
2062
2063      data = runModifiers(data.instance.modifiers, data, 'flip');
2064    }
2065  });
2066  return data;
2067}
2068
2069/**
2070 * @function
2071 * @memberof Modifiers
2072 * @argument {Object} data - The data object generated by update method
2073 * @argument {Object} options - Modifiers configuration and options
2074 * @returns {Object} The data object, properly modified
2075 */
2076function keepTogether(data) {
2077  var _data$offsets = data.offsets,
2078      popper = _data$offsets.popper,
2079      reference = _data$offsets.reference;
2080
2081  var placement = data.placement.split('-')[0];
2082  var floor = Math.floor;
2083  var isVertical = ['top', 'bottom'].indexOf(placement) !== -1;
2084  var side = isVertical ? 'right' : 'bottom';
2085  var opSide = isVertical ? 'left' : 'top';
2086  var measurement = isVertical ? 'width' : 'height';
2087
2088  if (popper[side] < floor(reference[opSide])) {
2089    data.offsets.popper[opSide] = floor(reference[opSide]) - popper[measurement];
2090  }
2091  if (popper[opSide] > floor(reference[side])) {
2092    data.offsets.popper[opSide] = floor(reference[side]);
2093  }
2094
2095  return data;
2096}
2097
2098/**
2099 * Converts a string containing value + unit into a px value number
2100 * @function
2101 * @memberof {modifiers~offset}
2102 * @private
2103 * @argument {String} str - Value + unit string
2104 * @argument {String} measurement - `height` or `width`
2105 * @argument {Object} popperOffsets
2106 * @argument {Object} referenceOffsets
2107 * @returns {Number|String}
2108 * Value in pixels, or original string if no values were extracted
2109 */
2110function toValue(str, measurement, popperOffsets, referenceOffsets) {
2111  // separate value from unit
2112  var split = str.match(/((?:\-|\+)?\d*\.?\d*)(.*)/);
2113  var value = +split[1];
2114  var unit = split[2];
2115
2116  // If it's not a number it's an operator, I guess
2117  if (!value) {
2118    return str;
2119  }
2120
2121  if (unit.indexOf('%') === 0) {
2122    var element = void 0;
2123    switch (unit) {
2124      case '%p':
2125        element = popperOffsets;
2126        break;
2127      case '%':
2128      case '%r':
2129      default:
2130        element = referenceOffsets;
2131    }
2132
2133    var rect = getClientRect(element);
2134    return rect[measurement] / 100 * value;
2135  } else if (unit === 'vh' || unit === 'vw') {
2136    // if is a vh or vw, we calculate the size based on the viewport
2137    var size = void 0;
2138    if (unit === 'vh') {
2139      size = Math.max(document.documentElement.clientHeight, window.innerHeight || 0);
2140    } else {
2141      size = Math.max(document.documentElement.clientWidth, window.innerWidth || 0);
2142    }
2143    return size / 100 * value;
2144  } else {
2145    // if is an explicit pixel unit, we get rid of the unit and keep the value
2146    // if is an implicit unit, it's px, and we return just the value
2147    return value;
2148  }
2149}
2150
2151/**
2152 * Parse an `offset` string to extrapolate `x` and `y` numeric offsets.
2153 * @function
2154 * @memberof {modifiers~offset}
2155 * @private
2156 * @argument {String} offset
2157 * @argument {Object} popperOffsets
2158 * @argument {Object} referenceOffsets
2159 * @argument {String} basePlacement
2160 * @returns {Array} a two cells array with x and y offsets in numbers
2161 */
2162function parseOffset(offset, popperOffsets, referenceOffsets, basePlacement) {
2163  var offsets = [0, 0];
2164
2165  // Use height if placement is left or right and index is 0 otherwise use width
2166  // in this way the first offset will use an axis and the second one
2167  // will use the other one
2168  var useHeight = ['right', 'left'].indexOf(basePlacement) !== -1;
2169
2170  // Split the offset string to obtain a list of values and operands
2171  // The regex addresses values with the plus or minus sign in front (+10, -20, etc)
2172  var fragments = offset.split(/(\+|\-)/).map(function (frag) {
2173    return frag.trim();
2174  });
2175
2176  // Detect if the offset string contains a pair of values or a single one
2177  // they could be separated by comma or space
2178  var divider = fragments.indexOf(find(fragments, function (frag) {
2179    return frag.search(/,|\s/) !== -1;
2180  }));
2181
2182  if (fragments[divider] && fragments[divider].indexOf(',') === -1) {
2183    console.warn('Offsets separated by white space(s) are deprecated, use a comma (,) instead.');
2184  }
2185
2186  // If divider is found, we divide the list of values and operands to divide
2187  // them by ofset X and Y.
2188  var splitRegex = /\s*,\s*|\s+/;
2189  var ops = divider !== -1 ? [fragments.slice(0, divider).concat([fragments[divider].split(splitRegex)[0]]), [fragments[divider].split(splitRegex)[1]].concat(fragments.slice(divider + 1))] : [fragments];
2190
2191  // Convert the values with units to absolute pixels to allow our computations
2192  ops = ops.map(function (op, index) {
2193    // Most of the units rely on the orientation of the popper
2194    var measurement = (index === 1 ? !useHeight : useHeight) ? 'height' : 'width';
2195    var mergeWithPrevious = false;
2196    return op
2197    // This aggregates any `+` or `-` sign that aren't considered operators
2198    // e.g.: 10 + +5 => [10, +, +5]
2199    .reduce(function (a, b) {
2200      if (a[a.length - 1] === '' && ['+', '-'].indexOf(b) !== -1) {
2201        a[a.length - 1] = b;
2202        mergeWithPrevious = true;
2203        return a;
2204      } else if (mergeWithPrevious) {
2205        a[a.length - 1] += b;
2206        mergeWithPrevious = false;
2207        return a;
2208      } else {
2209        return a.concat(b);
2210      }
2211    }, [])
2212    // Here we convert the string values into number values (in px)
2213    .map(function (str) {
2214      return toValue(str, measurement, popperOffsets, referenceOffsets);
2215    });

2216  });
2217
2218  // Loop trough the offsets arrays and execute the operations
2219  ops.forEach(function (op, index) {
2220    op.forEach(function (frag, index2) {
2221      if (isNumeric(frag)) {
2222        offsets[index] += frag * (op[index2 - 1] === '-' ? -1 : 1);
2223      }
2224    });
2225  });
2226  return offsets;
2227}
2228
2229/**
2230 * @function
2231 * @memberof Modifiers
2232 * @argument {Object} data - The data object generated by update method
2233 * @argument {Object} options - Modifiers configuration and options
2234 * @argument {Number|String} options.offset=0
2235 * The offset value as described in the modifier description
2236 * @returns {Object} The data object, properly modified
2237 */
2238function offset(data, _ref) {
2239  var offset = _ref.offset;
2240  var placement = data.placement,
2241      _data$offsets = data.offsets,
2242      popper = _data$offsets.popper,
2243      reference = _data$offsets.reference;
2244
2245  var basePlacement = placement.split('-')[0];
2246
2247  var offsets = void 0;
2248  if (isNumeric(+offset)) {
2249    offsets = [+offset, 0];
2250  } else {
2251    offsets = parseOffset(offset, popper, reference, basePlacement);
2252  }
2253
2254  if (basePlacement === 'left') {
2255    popper.top += offsets[0];
2256    popper.left -= offsets[1];
2257  } else if (basePlacement === 'right') {
2258    popper.top += offsets[0];
2259    popper.left += offsets[1];
2260  } else if (basePlacement === 'top') {
2261    popper.left += offsets[0];
2262    popper.top -= offsets[1];
2263  } else if (basePlacement === 'bottom') {
2264    popper.left += offsets[0];
2265    popper.top += offsets[1];
2266  }
2267
2268  data.popper = popper;
2269  return data;
2270}
2271
2272/**
2273 * @function
2274 * @memberof Modifiers
2275 * @argument {Object} data - The data object generated by `update` method
2276 * @argument {Object} options - Modifiers configuration and options
2277 * @returns {Object} The data object, properly modified
2278 */
2279function preventOverflow(data, options) {
2280  var boundariesElement = options.boundariesElement || getOffsetParent(data.instance.popper);
2281
2282  // If offsetParent is the reference element, we really want to
2283  // go one step up and use the next offsetParent as reference to
2284  // avoid to make this modifier completely useless and look like broken
2285  if (data.instance.reference === boundariesElement) {
2286    boundariesElement = getOffsetParent(boundariesElement);
2287  }
2288
2289  var boundaries = getBoundaries(data.instance.popper, data.instance.reference, options.padding, boundariesElement);
2290  options.boundaries = boundaries;
2291
2292  var order = options.priority;
2293  var popper = data.offsets.popper;
2294
2295  var check = {
2296    primary: function primary(placement) {
2297      var value = popper[placement];
2298      if (popper[placement] < boundaries[placement] && !options.escapeWithReference) {
2299        value = Math.max(popper[placement], boundaries[placement]);
2300      }
2301      return defineProperty({}, placement, value);
2302    },
2303    secondary: function secondary(placement) {
2304      var mainSide = placement === 'right' ? 'left' : 'top';
2305      var value = popper[mainSide];
2306      if (popper[placement] > boundaries[placement] && !options.escapeWithReference) {
2307        value = Math.min(popper[mainSide], boundaries[placement] - (placement === 'right' ? popper.width : popper.height));
2308      }
2309      return defineProperty({}, mainSide, value);
2310    }
2311  };
2312
2313  order.forEach(function (placement) {
2314    var side = ['left', 'top'].indexOf(placement) !== -1 ? 'primary' : 'secondary';
2315    popper = _extends({}, popper, check[side](placement));
2316  });
2317
2318  data.offsets.popper = popper;
2319
2320  return data;
2321}
2322
2323/**
2324 * @function
2325 * @memberof Modifiers
2326 * @argument {Object} data - The data object generated by `update` method
2327 * @argument {Object} options - Modifiers configuration and options
2328 * @returns {Object} The data object, properly modified
2329 */
2330function shift(data) {
2331  var placement = data.placement;
2332  var basePlacement = placement.split('-')[0];
2333  var shiftvariation = placement.split('-')[1];
2334
2335  // if shift shiftvariation is specified, run the modifier
2336  if (shiftvariation) {
2337    var _data$offsets = data.offsets,
2338        reference = _data$offsets.reference,
2339        popper = _data$offsets.popper;
2340
2341    var isVertical = ['bottom', 'top'].indexOf(basePlacement) !== -1;
2342    var side = isVertical ? 'left' : 'top';
2343    var measurement = isVertical ? 'width' : 'height';
2344
2345    var shiftOffsets = {
2346      start: defineProperty({}, side, reference[side]),
2347      end: defineProperty({}, side, reference[side] + reference[measurement] - popper[measurement])
2348    };
2349
2350    data.offsets.popper = _extends({}, popper, shiftOffsets[shiftvariation]);
2351  }
2352
2353  return data;
2354}
2355
2356/**
2357 * @function
2358 * @memberof Modifiers
2359 * @argument {Object} data - The data object generated by update method
2360 * @argument {Object} options - Modifiers configuration and options
2361 * @returns {Object} The data object, properly modified
2362 */
2363function hide(data) {
2364  if (!isModifierRequired(data.instance.modifiers, 'hide', 'preventOverflow')) {
2365    return data;
2366  }
2367
2368  var refRect = data.offsets.reference;
2369  var bound = find(data.instance.modifiers, function (modifier) {

2370    return modifier.name === 'preventOverflow';
2371  }).boundaries;
2372
2373  if (refRect.bottom < bound.top || refRect.left > bound.right || refRect.top > bound.bottom || refRect.right < bound.left) {
2374    // Avoid unnecessary DOM access if visibility hasn't changed
2375    if (data.hide === true) {
2376      return data;
2377    }
2378
2379    data.hide = true;
2380    data.attributes['x-out-of-boundaries'] = '';
2381  } else {
2382    // Avoid unnecessary DOM access if visibility hasn't changed
2383    if (data.hide === false) {
2384      return data;
2385    }
2386
2387    data.hide = false;
2388    data.attributes['x-out-of-boundaries'] = false;
2389  }
2390
2391  return data;
2392}
2393
2394/**
2395 * @function
2396 * @memberof Modifiers
2397 * @argument {Object} data - The data object generated by `update` method
2398 * @argument {Object} options - Modifiers configuration and options
2399 * @returns {Object} The data object, properly modified
2400 */
2401function inner(data) {
2402  var placement = data.placement;
2403  var basePlacement = placement.split('-')[0];
2404  var _data$offsets = data.offsets,
2405      popper = _data$offsets.popper,
2406      reference = _data$offsets.reference;
2407
2408  var isHoriz = ['left', 'right'].indexOf(basePlacement) !== -1;
2409
2410  var subtractLength = ['top', 'left'].indexOf(basePlacement) === -1;
2411
2412  popper[isHoriz ? 'left' : 'top'] = reference[basePlacement] - (subtractLength ? popper[isHoriz ? 'width' : 'height'] : 0);
2413
2414  data.placement = getOppositePlacement(placement);
2415  data.offsets.popper = getClientRect(popper);
2416
2417  return data;
2418}
2419
2420/**
2421 * Modifier function, each modifier can have a function of this type assigned
2422 * to its `fn` property.<br />
2423 * These functions will be called on each update, this means that you must
2424 * make sure they are performant enough to avoid performance bottlenecks.
2425 *
2426 * @function ModifierFn
2427 * @argument {dataObject} data - The data object generated by `update` method
2428 * @argument {Object} options - Modifiers configuration and options
2429 * @returns {dataObject} The data object, properly modified
2430 */
2431
2432/**
2433 * Modifiers are plugins used to alter the behavior of your poppers.<br />
2434 * Popper.js uses a set of 9 modifiers to provide all the basic functionalities
2435 * needed by the library.
2436 *
2437 * Usually you don't want to override the `order`, `fn` and `onLoad` props.
2438 * All the other properties are configurations that could be tweaked.
2439 * @namespace modifiers
2440 */
2441var modifiers = {
2442  /**
2443   * Modifier used to shift the popper on the start or end of its reference
2444   * element.<br />
2445   * It will read the variation of the `placement` property.<br />
2446   * It can be one either `-end` or `-start`.
2447   * @memberof modifiers
2448   * @inner
2449   */
2450  shift: {
2451    /** @prop {number} order=100 - Index used to define the order of execution */
2452    order: 100,
2453    /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
2454    enabled: true,
2455    /** @prop {ModifierFn} */
2456    fn: shift
2457  },
2458
2459  /**
2460   * The `offset` modifier can shift your popper on both its axis.
2461   *
2462   * It accepts the following units:
2463   * - `px` or unitless, interpreted as pixels
2464   * - `%` or `%r`, percentage relative to the length of the reference element
2465   * - `%p`, percentage relative to the length of the popper element
2466   * - `vw`, CSS viewport width unit
2467   * - `vh`, CSS viewport height unit
2468   *
2469   * For length is intended the main axis relative to the placement of the popper.<br />
2470   * This means that if the placement is `top` or `bottom`, the length will be the
2471   * `width`. In case of `left` or `right`, it will be the height.
2472   *
2473   * You can provide a single value (as `Number` or `String`), or a pair of values
2474   * as `String` divided by a comma or one (or more) white space

2474s.<br />
2475   * The latter is a deprecated method because it leads to confusion and will be
2476   * removed in v2.<br />
2477   * Additionally, it accepts additions and subtractions between different units.
2478   * Note that multiplications and divisions aren't supported.
2479   *
2480   * Valid examples are:
2481   * ```
2482   * 10
2483   * '10%'
2484   * '10, 10'
2485   * '10%, 10'
2486   * '10 + 10%'
2487   * '10 - 5vh + 3%'
2488   * '-10px + 5vh, 5px - 6%'
2489   * ```
2490   * > **NB**: If you desire to apply offsets to your poppers in a way that may make them overlap
2491   * > with their reference element, unfortunately, you will have to disable the `flip` modifier.
2492   * > More on this [reading this issue](https://github.com/FezVrasta/popper.js/issues/373)
2493   *
2494   * @memberof modifiers
2495   * @inner
2496   */
2497  offset: {
2498    /** @prop {number} order=200 - Index used to define the order of execution */
2499    order: 200,
2500    /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
2501    enabled: true,
2502    /** @prop {ModifierFn} */
2503    fn: offset,
2504    /** @prop {Number|String} offset=0
2505     * The offset value as described in the modifier description
2506     */
2507    offset: 0
2508  },
2509
2510  /**
2511   * Modifier used to prevent the popper from being positioned outside the boundary.
2512   *
2513   * An scenario exists where the reference itself is not within the boundaries.<br />
2514   * We can say it has "escaped the boundaries" — or just "escaped".<br />
2515   * In this case we need to decide whether the popper should either:
2516   *
2517   * - detach from the reference and remain "trapped" in the boundaries, or
2518   * - if it should ignore the boundary and "escape with its reference"
2519   *
2520   * When `escapeWithReference` is set to`true` and reference is completely
2521   * outside its boundaries, the popper will overflow (or completely leave)
2522   * the boundaries in order to remain attached to the edge of the reference.
2523   *
2524   * @memberof modifiers
2525   * @inner
2526   */
2527  preventOverflow: {
2528    /** @prop {number} order=300 - Index used to define the order of execution */
2529    order: 300,
2530    /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
2531    enabled: true,
2532    /** @prop {ModifierFn} */
2533    fn: preventOverflow,
2534    /**
2535     * @prop {Array} [priority=['left','right','top','bottom']]
2536     * Popper will try to prevent overflow following these priorities by default,
2537     * then, it could overflow on the left and on top of the `boundariesElement`
2538     */
2539    priority: ['left', 'right', 'top', 'bottom'],
2540    /**
2541     * @prop {number} padding=5
2542     * Amount of pixel used to define a minimum distance between the boundaries
2543     * and the popper this makes sure the popper has always a little padding
2544     * between the edges of its container
2545     */
2546    padding: 5,
2547    /**
2548     * @prop {String|HTMLElement} boundariesElement='scrollParent'
2549     * Boundaries used by the modifier, can be `scrollParent`, `window`,
2550     * `viewport` or any DOM element.
2551     */
2552    boundariesElement: 'scrollParent'
2553  },
2554
2555  /**
2556   * Modifier used to make sure the reference and its popper stay near eachothers
2557   * without leaving any gap between the two. Expecially useful when the arrow is
2558   * enabled and you want to assure it to point to its reference element.
2559   * It cares only about the first axis, you can still have poppers with margin
2560   * between the popper and its reference element.
2561   * @memberof modifiers
2562   * @inner
2563   */
2564  keepTogether: {
2565    /** @prop {number} order=400 - Index used to define the order of execution */
2566    order: 400,
2567    /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
2568    enabled: true,
2569    /** @prop {ModifierFn} */
2570    fn: keepTogether
2571  },
2572
2573  /**
2574   * This modifier is used to move the `arrowElement` of the popper to make
2575   * sure it is positioned between the reference element and its popper element.
2576   * It will read the outer size of the `arrowElement` node to detect how many
2577   * pixels of conjuction are needed.
2578   *
2579   * It has no effect if no `arrowElement` is provided.
2580   * @memberof modifiers
2581   * @inner
2582   */
2583  arrow: {
2584    /** @prop {number} order=500 - Index used to define the order of execution */
2585    order: 500,
2586    /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
2587    enabled: true,
2588    /** @prop {ModifierFn} */
2589    fn: arrow,
2590    /** @prop {String|HTMLElement} element='[x-arrow]' - Selector or node used as arrow */
2591    element: '[x-arrow]'
2592  },
2593
2594  /**
2595   * Modifier used to flip the popper's placement when it starts to overlap its
2596   * reference element.
2597   *
2598   * Requires the `preventOverflow` modifier before it in order to work.
2599   *
2600   * **NOTE:** this modifier will interrupt the current update cycle and will
2601   * restart it if it detects the need to flip the placement.
2602   * @memberof modifiers
2603   * @inner
2604   */
2605  flip: {
2606    /** @prop {number} order=600 - Index used to define the order of execution */
2607    order: 600,
2608    /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
2609    enabled: true,
2610    /** @prop {ModifierFn} */
2611    fn: flip,
2612    /**
2613     * @prop {String|Array} behavior='flip'
2614     * The behavior used to change the popper's placement. It can be one of
2615     * `flip`, `clockwise`, `counterclockwise` or an array with a list of valid
2616     * placements (with optional variations).
2617     */
2618    behavior: 'flip',
2619    /**
2620     * @prop {number} padding=5
2621     * The popper will flip if it hits the edges of the `boundariesElement`
2622     */
2623    padding: 5,
2624    /**
2625     * @prop {String|HTMLElement} boundariesElement='viewport'
2626     * The element which will define the boundaries of the popper position,
2627     * the popper will never be placed outside of the defined boundaries
2628     * (except if keepTogether is enabled)
2629     */
2630    boundariesElement: 'viewport'
2631  },
2632
2633  /**
2634   * Modifier used to make the popper flow toward the inner of the reference element.
2635   * By default, when this modifier is disabled, the popper will be placed outside
2636   * the reference element.
2637   * @memberof modifiers
2638   * @inner
2639   */
2640  inner: {
2641    /** @prop {number} order=700 - Index used to define the order of execution */
2642    order: 700,
2643    /** @prop {Boolean} enabled=false - Whether the modifier is enabled or not */
2644    enabled: false,
2645    /** @prop {ModifierFn} */
2646    fn: inner
2647  },
2648
2649  /**
2650   * Modifier used to hide the popper when its reference element is outside of the
2651   * popper boundaries. It will set a `x-out-of-boundaries` attribute which can
2652   * be used to hide with a CSS selector the popper when its reference is
2653   * out of boundaries.
2654   *
2655   * Requires the `preventOverflow` modifier before it in order to work.
2656   * @memberof modifiers
2657   * @inner
2658   */
2659  hide: {
2660    /** @prop {number} order=800 - Index used to define the order of execution */
2661    order: 800,
2662    /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
2663    enabled: true,
2664    /** @prop {ModifierFn} */
2665    fn: hide
2666  },
2667
2668  /**
2669   * Computes the style that will be applied to the popper element to gets
2670   * properly positioned.
2671   *
2672   * Note that this modifier will not touch the DOM, it just prepares the styles
2673   * so that `applyStyle` modifier can apply it. This separation is useful
2674   * in case you need to replace `applyStyle` with a custom implementation.
2675   *
2676   * This modifier has `850` as `order` value to maintain backward compatibility
2677   * with previous versions of Popper.js. Expect the modifiers ordering method
2678   * to change in future major versions of the library.
2679   *
2680   * @memberof modifiers
2681   * @inner
2682   */
2683  computeStyle: {
2684    /** @prop {number} order=850 - Index used to define the order of execution */
2685    order: 850,
2686    /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
2687    enabled: true,
2688    /** @prop {ModifierFn} */
2689    fn: computeStyle,
2690    /**
2691     * @prop {Boolean} gpuAcceleration=true
2692     * If true, it uses the CSS 3d transformation to position the popper.
2693     * Otherwise, it will use the `top` and `left` properties.
2694     */
2695    gpuAcceleration: true,
2696    /**
2697     * @prop {string} [x='bottom']
2698     * Where to anchor the X axis (`bottom` or `top`). AKA X offset origin.
2699     * Change this if your popper should grow in a direction different from `bottom`
2700     */
2701    x: 'bottom',
2702    /**
2703     * @prop {string} [x='left']
2704     * Where to anchor the Y axis (`left` or `right`). AKA Y offset origin.
2705     * Change this if your popper should grow in a direction different from `right`
2706     */
2707    y: 'right'
2708  },
2709
2710  /**
2711   * Applies the computed styles to the popper element.
2712   *
2713   * All the DOM manipulations are limited to this modifier. This is useful in case
2714   * you want to integrate Popper.js inside a framework or view library and you
2715   * want to delegate all the DOM manipulations to it.
2716   *
2717   * Note that if you disable this modifier, you must make sure the popper element
2718   * has its position set to `absolute` before Popper.js can do its work!
2719   *
2720   * Just disable this modifier and define you own to achieve the desired effect.
2721   *
2722   * @memberof modifiers
2723   * @inner
2724   */
2725  applyStyle: {
2726    /** @prop {number} order=900 - Index used to define the order of execution */
2727    order: 900,
2728    /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
2729    enabled: true,
2730    /** @prop {ModifierFn} */