source: src/main/resources/static/assets/js/popper.js@ e96d444

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1/**!
2 * @fileOverview Kickass library to create and place poppers near their reference elements.
3 * @version 1.12.9
4 * @license
5 * Copyright (c) 2016 Federico Zivolo and contributors
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal
9 * in the Software without restriction, including without limitation the rights
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 * copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included in all
15 * copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
23 * SOFTWARE.
24 */
25(function (global, factory) {
26 typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
27 typeof define === 'function' && define.amd ? define(factory) :
28 (global.Popper = factory());
29}(this, (function () { 'use strict';
30
31var isBrowser = typeof window !== 'undefined' && typeof document !== 'undefined';
32var longerTimeoutBrowsers = ['Edge', 'Trident', 'Firefox'];
33var timeoutDuration = 0;
34for (var i = 0; i < longerTimeoutBrowsers.length; i += 1) {
35 if (isBrowser && navigator.userAgent.indexOf(longerTimeoutBrowsers[i]) >= 0) {
36 timeoutDuration = 1;
37 break;
38 }
39}
40
41function microtaskDebounce(fn) {
42 var called = false;
43 return function () {
44 if (called) {
45 return;
46 }
47 called = true;
48 window.Promise.resolve().then(function () {
49 called = false;
50 fn();
51 });
52 };
53}
54
55function taskDebounce(fn) {
56 var scheduled = false;
57 return function () {
58 if (!scheduled) {
59 scheduled = true;
60 setTimeout(function () {
61 scheduled = false;
62 fn();
63 }, timeoutDuration);
64 }
65 };
66}
67
68var supportsMicroTasks = isBrowser && window.Promise;
69
70/**
71* Create a debounced version of a method, that's asynchronously deferred
72* but called in the minimum time possible.
73*
74* @method
75* @memberof Popper.Utils
76* @argument {Function} fn
77* @returns {Function}
78*/
79var debounce = supportsMicroTasks ? microtaskDebounce : taskDebounce;
80
81/**
82 * Check if the given variable is a function
83 * @method
84 * @memberof Popper.Utils
85 * @argument {Any} functionToCheck - variable to check
86 * @returns {Boolean} answer to: is a function?
87 */
88function isFunction(functionToCheck) {
89 var getType = {};
90 return functionToCheck && getType.toString.call(functionToCheck) === '[object Function]';
91}
92
93/**
94 * Get CSS computed property of the given element
95 * @method
96 * @memberof Popper.Utils
97 * @argument {Eement} element
98 * @argument {String} property
99 */
100function getStyleComputedProperty(element, property) {
101 if (element.nodeType !== 1) {
102 return [];
103 }
104 // NOTE: 1 DOM access here
105 var css = getComputedStyle(element, null);
106 return property ? css[property] : css;
107}
108
109/**
110 * Returns the parentNode or the host of the element
111 * @method
112 * @memberof Popper.Utils
113 * @argument {Element} element
114 * @returns {Element} parent
115 */
116function getParentNode(element) {
117 if (element.nodeName === 'HTML') {
118 return element;
119 }
120 return element.parentNode || element.host;
121}
122
123/**
124 * Returns the scrolling parent of the given element
125 * @method
126 * @memberof Popper.Utils
127 * @argument {Element} element
128 * @returns {Element} scroll parent
129 */
130function getScrollParent(element) {
131 // Return body, `getScroll` will take care to get the correct `scrollTop` from it
132 if (!element) {
133 return document.body;
134 }
135
136 switch (element.nodeName) {
137 case 'HTML':
138 case 'BODY':
139 return element.ownerDocument.body;
140 case '#document':
141 return element.body;
142 }
143
144 // Firefox want us to check `-x` and `-y` variations as well
145
146 var _getStyleComputedProp = getStyleComputedProperty(element),
147 overflow = _getStyleComputedProp.overflow,
148 overflowX = _getStyleComputedProp.overflowX,
149 overflowY = _getStyleComputedProp.overflowY;
150
151 if (/(auto|scroll)/.test(overflow + overflowY + overflowX)) {
152 return element;
153 }
154
155 return getScrollParent(getParentNode(element));
156}
157
158/**
159 * Returns the offset parent of the given element
160 * @method
161 * @memberof Popper.Utils
162 * @argument {Element} element
163 * @returns {Element} offset parent
164 */
165function getOffsetParent(element) {
166 // NOTE: 1 DOM access here
167 var offsetParent = element && element.offsetParent;
168 var nodeName = offsetParent && offsetParent.nodeName;
169
170 if (!nodeName || nodeName === 'BODY' || nodeName === 'HTML') {
171 if (element) {
172 return element.ownerDocument.documentElement;
173 }
174
175 return document.documentElement;
176 }
177
178 // .offsetParent will return the closest TD or TABLE in case
179 // no offsetParent is present, I hate this job...
180 if (['TD', 'TABLE'].indexOf(offsetParent.nodeName) !== -1 && getStyleComputedProperty(offsetParent, 'position') === 'static') {
181 return getOffsetParent(offsetParent);
182 }
183
184 return offsetParent;
185}
186
187function isOffsetContainer(element) {
188 var nodeName = element.nodeName;
189
190 if (nodeName === 'BODY') {
191 return false;
192 }
193 return nodeName === 'HTML' || getOffsetParent(element.firstElementChild) === element;
194}
195
196/**
197 * Finds the root node (document, shadowDOM root) of the given element
198 * @method
199 * @memberof Popper.Utils
200 * @argument {Element} node
201 * @returns {Element} root node
202 */
203function getRoot(node) {
204 if (node.parentNode !== null) {
205 return getRoot(node.parentNode);
206 }
207
208 return node;
209}
210
211/**
212 * Finds the offset parent common to the two provided nodes
213 * @method
214 * @memberof Popper.Utils
215 * @argument {Element} element1
216 * @argument {Element} element2
217 * @returns {Element} common offset parent
218 */
219function findCommonOffsetParent(element1, element2) {
220 // This check is needed to avoid errors in case one of the elements isn't defined for any reason
221 if (!element1 || !element1.nodeType || !element2 || !element2.nodeType) {
222 return document.documentElement;
223 }
224
225 // Here we make sure to give as "start" the element that comes first in the DOM
226 var order = element1.compareDocumentPosition(element2) & Node.DOCUMENT_POSITION_FOLLOWING;
227 var start = order ? element1 : element2;
228 var end = order ? element2 : element1;
229
230 // Get common ancestor container
231 var range = document.createRange();
232 range.setStart(start, 0);
233 range.setEnd(end, 0);
234 var commonAncestorContainer = range.commonAncestorContainer;
235
236 // Both nodes are inside #document
237
238 if (element1 !== commonAncestorContainer && element2 !== commonAncestorContainer || start.contains(end)) {
239 if (isOffsetContainer(commonAncestorContainer)) {
240 return commonAncestorContainer;
241 }
242
243 return getOffsetParent(commonAncestorContainer);
244 }
245
246 // one of the nodes is inside shadowDOM, find which one
247 var element1root = getRoot(element1);
248 if (element1root.host) {
249 return findCommonOffsetParent(element1root.host, element2);
250 } else {
251 return findCommonOffsetParent(element1, getRoot(element2).host);
252 }
253}
254
255/**
256 * Gets the scroll value of the given element in the given side (top and left)
257 * @method
258 * @memberof Popper.Utils
259 * @argument {Element} element
260 * @argument {String} side `top` or `left`
261 * @returns {number} amount of scrolled pixels
262 */
263function getScroll(element) {
264 var side = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 'top';
265
266 var upperSide = side === 'top' ? 'scrollTop' : 'scrollLeft';
267 var nodeName = element.nodeName;
268
269 if (nodeName === 'BODY' || nodeName === 'HTML') {
270 var html = element.ownerDocument.documentElement;
271 var scrollingElement = element.ownerDocument.scrollingElement || html;
272 return scrollingElement[upperSide];
273 }
274
275 return element[upperSide];
276}
277
278/*
279 * Sum or subtract the element scroll values (left and top) from a given rect object
280 * @method
281 * @memberof Popper.Utils
282 * @param {Object} rect - Rect object you want to change
283 * @param {HTMLElement} element - The element from the function reads the scroll values
284 * @param {Boolean} subtract - set to true if you want to subtract the scroll values
285 * @return {Object} rect - The modifier rect object
286 */
287function includeScroll(rect, element) {
288 var subtract = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : false;
289
290 var scrollTop = getScroll(element, 'top');
291 var scrollLeft = getScroll(element, 'left');
292 var modifier = subtract ? -1 : 1;
293 rect.top += scrollTop * modifier;
294 rect.bottom += scrollTop * modifier;
295 rect.left += scrollLeft * modifier;
296 rect.right += scrollLeft * modifier;
297 return rect;
298}
299
300/*
301 * Helper to detect borders of a given element
302 * @method
303 * @memberof Popper.Utils
304 * @param {CSSStyleDeclaration} styles
305 * Result of `getStyleComputedProperty` on the given element
306 * @param {String} axis - `x` or `y`
307 * @return {number} borders - The borders size of the given axis
308 */
309
310function getBordersSize(styles, axis) {
311 var sideA = axis === 'x' ? 'Left' : 'Top';
312 var sideB = sideA === 'Left' ? 'Right' : 'Bottom';
313
314 return parseFloat(styles['border' + sideA + 'Width'], 10) + parseFloat(styles['border' + sideB + 'Width'], 10);
315}
316
317/**
318 * Tells if you are running Internet Explorer 10
319 * @method
320 * @memberof Popper.Utils
321 * @returns {Boolean} isIE10
322 */
323var isIE10 = undefined;
324
325var isIE10$1 = function () {
326 if (isIE10 === undefined) {
327 isIE10 = navigator.appVersion.indexOf('MSIE 10') !== -1;
328 }
329 return isIE10;
330};
331
332function getSize(axis, body, html, computedStyle) {
333 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);
334}
335
336function getWindowSizes() {
337 var body = document.body;
338 var html = document.documentElement;
339 var computedStyle = isIE10$1() && getComputedStyle(html);
340
341 return {
342 height: getSize('Height', body, html, computedStyle),
343 width: getSize('Width', body, html, computedStyle)
344 };
345}
346
347var classCallCheck = function (instance, Constructor) {
348 if (!(instance instanceof Constructor)) {
349 throw new TypeError("Cannot call a class as a function");
350 }
351};
352
353var createClass = function () {
354 function defineProperties(target, props) {
355 for (var i = 0; i < props.length; i++) {
356 var descriptor = props[i];
357 descriptor.enumerable = descriptor.enumerable || false;
358 descriptor.configurable = true;
359 if ("value" in descriptor) descriptor.writable = true;
360 Object.defineProperty(target, descriptor.key, descriptor);
361 }
362 }
363
364 return function (Constructor, protoProps, staticProps) {
365 if (protoProps) defineProperties(Constructor.prototype, protoProps);
366 if (staticProps) defineProperties(Constructor, staticProps);
367 return Constructor;
368 };
369}();
370
371
372
373
374
375var defineProperty = function (obj, key, value) {
376 if (key in obj) {
377 Object.defineProperty(obj, key, {
378 value: value,
379 enumerable: true,
380 configurable: true,
381 writable: true
382 });
383 } else {
384 obj[key] = value;
385 }
386
387 return obj;
388};
389
390var _extends = Object.assign || function (target) {
391 for (var i = 1; i < arguments.length; i++) {
392 var source = arguments[i];
393
394 for (var key in source) {
395 if (Object.prototype.hasOwnProperty.call(source, key)) {
396 target[key] = source[key];
397 }
398 }
399 }
400
401 return target;
402};
403
404/**
405 * Given element offsets, generate an output similar to getBoundingClientRect
406 * @method
407 * @memberof Popper.Utils
408 * @argument {Object} offsets
409 * @returns {Object} ClientRect like output
410 */
411function getClientRect(offsets) {
412 return _extends({}, offsets, {
413 right: offsets.left + offsets.width,
414 bottom: offsets.top + offsets.height
415 });
416}
417
418/**
419 * Get bounding client rect of given element
420 * @method
421 * @memberof Popper.Utils
422 * @param {HTMLElement} element
423 * @return {Object} client rect
424 */
425function getBoundingClientRect(element) {
426 var rect = {};
427
428 // IE10 10 FIX: Please, don't ask, the element isn't
429 // considered in DOM in some circumstances...
430 // This isn't reproducible in IE10 compatibility mode of IE11
431 if (isIE10$1()) {
432 try {
433 rect = element.getBoundingClientRect();
434 var scrollTop = getScroll(element, 'top');
435 var scrollLeft = getScroll(element, 'left');
436 rect.top += scrollTop;
437 rect.left += scrollLeft;
438 rect.bottom += scrollTop;
439 rect.right += scrollLeft;
440 } catch (err) {}
441 } else {
442 rect = element.getBoundingClientRect();
443 }
444
445 var result = {
446 left: rect.left,
447 top: rect.top,
448 width: rect.right - rect.left,
449 height: rect.bottom - rect.top
450 };
451
452 // subtract scrollbar size from sizes
453 var sizes = element.nodeName === 'HTML' ? getWindowSizes() : {};
454 var width = sizes.width || element.clientWidth || result.right - result.left;
455 var height = sizes.height || element.clientHeight || result.bottom - result.top;
456
457 var horizScrollbar = element.offsetWidth - width;
458 var vertScrollbar = element.offsetHeight - height;
459
460 // if an hypothetical scrollbar is detected, we must be sure it's not a `border`
461 // we make this check conditional for performance reasons
462 if (horizScrollbar || vertScrollbar) {
463 var styles = getStyleComputedProperty(element);
464 horizScrollbar -= getBordersSize(styles, 'x');
465 vertScrollbar -= getBordersSize(styles, 'y');
466
467 result.width -= horizScrollbar;
468 result.height -= vertScrollbar;
469 }
470
471 return getClientRect(result);
472}
473
474function getOffsetRectRelativeToArbitraryNode(children, parent) {
475 var isIE10 = isIE10$1();
476 var isHTML = parent.nodeName === 'HTML';
477 var childrenRect = getBoundingClientRect(children);
478 var parentRect = getBoundingClientRect(parent);
479 var scrollParent = getScrollParent(children);
480
481 var styles = getStyleComputedProperty(parent);
482 var borderTopWidth = parseFloat(styles.borderTopWidth, 10);
483 var borderLeftWidth = parseFloat(styles.borderLeftWidth, 10);
484
485 var offsets = getClientRect({
486 top: childrenRect.top - parentRect.top - borderTopWidth,
487 left: childrenRect.left - parentRect.left - borderLeftWidth,
488 width: childrenRect.width,
489 height: childrenRect.height
490 });
491 offsets.marginTop = 0;
492 offsets.marginLeft = 0;
493
494 // Subtract margins of documentElement in case it's being used as parent
495 // we do this only on HTML because it's the only element that behaves
496 // differently when margins are applied to it. The margins are included in
497 // the box of the documentElement, in the other cases not.
498 if (!isIE10 && isHTML) {
499 var marginTop = parseFloat(styles.marginTop, 10);
500 var marginLeft = parseFloat(styles.marginLeft, 10);
501
502 offsets.top -= borderTopWidth - marginTop;
503 offsets.bottom -= borderTopWidth - marginTop;
504 offsets.left -= borderLeftWidth - marginLeft;
505 offsets.right -= borderLeftWidth - marginLeft;
506
507 // Attach marginTop and marginLeft because in some circumstances we may need them
508 offsets.marginTop = marginTop;
509 offsets.marginLeft = marginLeft;
510 }
511
512 if (isIE10 ? parent.contains(scrollParent) : parent === scrollParent && scrollParent.nodeName !== 'BODY') {
513 offsets = includeScroll(offsets, parent);
514 }
515
516 return offsets;
517}
518
519function getViewportOffsetRectRelativeToArtbitraryNode(element) {
520 var html = element.ownerDocument.documentElement;
521 var relativeOffset = getOffsetRectRelativeToArbitraryNode(element, html);
522 var width = Math.max(html.clientWidth, window.innerWidth || 0);
523 var height = Math.max(html.clientHeight, window.innerHeight || 0);
524
525 var scrollTop = getScroll(html);
526 var scrollLeft = getScroll(html, 'left');
527
528 var offset = {
529 top: scrollTop - relativeOffset.top + relativeOffset.marginTop,
530 left: scrollLeft - relativeOffset.left + relativeOffset.marginLeft,
531 width: width,
532 height: height
533 };
534
535 return getClientRect(offset);
536}
537
538/**
539 * Check if the given element is fixed or is inside a fixed parent
540 * @method
541 * @memberof Popper.Utils
542 * @argument {Element} element
543 * @argument {Element} customContainer
544 * @returns {Boolean} answer to "isFixed?"
545 */
546function isFixed(element) {
547 var nodeName = element.nodeName;
548 if (nodeName === 'BODY' || nodeName === 'HTML') {
549 return false;
550 }
551 if (getStyleComputedProperty(element, 'position') === 'fixed') {
552 return true;
553 }
554 return isFixed(getParentNode(element));
555}
556
557/**
558 * Computed the boundaries limits and return them
559 * @method
560 * @memberof Popper.Utils
561 * @param {HTMLElement} popper
562 * @param {HTMLElement} reference
563 * @param {number} padding
564 * @param {HTMLElement} boundariesElement - Element used to define the boundaries
565 * @returns {Object} Coordinates of the boundaries
566 */
567function getBoundaries(popper, reference, padding, boundariesElement) {
568 // NOTE: 1 DOM access here
569 var boundaries = { top: 0, left: 0 };
570 var offsetParent = findCommonOffsetParent(popper, reference);
571
572 // Handle viewport case
573 if (boundariesElement === 'viewport') {
574 boundaries = getViewportOffsetRectRelativeToArtbitraryNode(offsetParent);
575 } else {
576 // Handle other cases based on DOM element used as boundaries
577 var boundariesNode = void 0;
578 if (boundariesElement === 'scrollParent') {
579 boundariesNode = getScrollParent(getParentNode(reference));
580 if (boundariesNode.nodeName === 'BODY') {
581 boundariesNode = popper.ownerDocument.documentElement;
582 }
583 } else if (boundariesElement === 'window') {
584 boundariesNode = popper.ownerDocument.documentElement;
585 } else {
586 boundariesNode = boundariesElement;
587 }
588
589 var offsets = getOffsetRectRelativeToArbitraryNode(boundariesNode, offsetParent);
590
591 // In case of HTML, we need a different computation
592 if (boundariesNode.nodeName === 'HTML' && !isFixed(offsetParent)) {
593 var _getWindowSizes = getWindowSizes(),
594 height = _getWindowSizes.height,
595 width = _getWindowSizes.width;
596
597 boundaries.top += offsets.top - offsets.marginTop;
598 boundaries.bottom = height + offsets.top;
599 boundaries.left += offsets.left - offsets.marginLeft;
600 boundaries.right = width + offsets.left;
601 } else {
602 // for all the other DOM elements, this one is good
603 boundaries = offsets;
604 }
605 }
606
607 // Add paddings
608 boundaries.left += padding;
609 boundaries.top += padding;
610 boundaries.right -= padding;
611 boundaries.bottom -= padding;
612
613 return boundaries;
614}
615
616function getArea(_ref) {
617 var width = _ref.width,
618 height = _ref.height;
619
620 return width * height;
621}
622
623/**
624 * Utility used to transform the `auto` placement to the placement with more
625 * available space.
626 * @method
627 * @memberof Popper.Utils
628 * @argument {Object} data - The data object generated by update method
629 * @argument {Object} options - Modifiers configuration and options
630 * @returns {Object} The data object, properly modified
631 */
632function computeAutoPlacement(placement, refRect, popper, reference, boundariesElement) {
633 var padding = arguments.length > 5 && arguments[5] !== undefined ? arguments[5] : 0;
634
635 if (placement.indexOf('auto') === -1) {
636 return placement;
637 }
638
639 var boundaries = getBoundaries(popper, reference, padding, boundariesElement);
640
641 var rects = {
642 top: {
643 width: boundaries.width,
644 height: refRect.top - boundaries.top
645 },
646 right: {
647 width: boundaries.right - refRect.right,
648 height: boundaries.height
649 },
650 bottom: {
651 width: boundaries.width,
652 height: boundaries.bottom - refRect.bottom
653 },
654 left: {
655 width: refRect.left - boundaries.left,
656 height: boundaries.height
657 }
658 };
659
660 var sortedAreas = Object.keys(rects).map(function (key) {
661 return _extends({
662 key: key
663 }, rects[key], {
664 area: getArea(rects[key])
665 });
666 }).sort(function (a, b) {
667 return b.area - a.area;
668 });
669
670 var filteredAreas = sortedAreas.filter(function (_ref2) {
671 var width = _ref2.width,
672 height = _ref2.height;
673 return width >= popper.clientWidth && height >= popper.clientHeight;
674 });
675
676 var computedPlacement = filteredAreas.length > 0 ? filteredAreas[0].key : sortedAreas[0].key;
677
678 var variation = placement.split('-')[1];
679
680 return computedPlacement + (variation ? '-' + variation : '');
681}
682
683/**
684 * Get offsets to the reference element
685 * @method
686 * @memberof Popper.Utils
687 * @param {Object} state
688 * @param {Element} popper - the popper element
689 * @param {Element} reference - the reference element (the popper will be relative to this)
690 * @returns {Object} An object containing the offsets which will be applied to the popper
691 */
692function getReferenceOffsets(state, popper, reference) {
693 var commonOffsetParent = findCommonOffsetParent(popper, reference);
694 return getOffsetRectRelativeToArbitraryNode(reference, commonOffsetParent);
695}
696
697/**
698 * Get the outer sizes of the given element (offset size + margins)
699 * @method
700 * @memberof Popper.Utils
701 * @argument {Element} element
702 * @returns {Object} object containing width and height properties
703 */
704function getOuterSizes(element) {
705 var styles = getComputedStyle(element);
706 var x = parseFloat(styles.marginTop) + parseFloat(styles.marginBottom);
707 var y = parseFloat(styles.marginLeft) + parseFloat(styles.marginRight);
708 var result = {
709 width: element.offsetWidth + y,
710 height: element.offsetHeight + x
711 };
712 return result;
713}
714
715/**
716 * Get the opposite placement of the given one
717 * @method
718 * @memberof Popper.Utils
719 * @argument {String} placement
720 * @returns {String} flipped placement
721 */
722function getOppositePlacement(placement) {
723 var hash = { left: 'right', right: 'left', bottom: 'top', top: 'bottom' };
724 return placement.replace(/left|right|bottom|top/g, function (matched) {
725 return hash[matched];
726 });
727}
728
729/**
730 * Get offsets to the popper
731 * @method
732 * @memberof Popper.Utils
733 * @param {Object} position - CSS position the Popper will get applied
734 * @param {HTMLElement} popper - the popper element
735 * @param {Object} referenceOffsets - the reference offsets (the popper will be relative to this)
736 * @param {String} placement - one of the valid placement options
737 * @returns {Object} popperOffsets - An object containing the offsets which will be applied to the popper
738 */
739function getPopperOffsets(popper, referenceOffsets, placement) {
740 placement = placement.split('-')[0];
741
742 // Get popper node sizes
743 var popperRect = getOuterSizes(popper);
744
745 // Add position, width and height to our offsets object
746 var popperOffsets = {
747 width: popperRect.width,
748 height: popperRect.height
749 };
750
751 // depending by the popper placement we have to compute its offsets slightly differently
752 var isHoriz = ['right', 'left'].indexOf(placement) !== -1;
753 var mainSide = isHoriz ? 'top' : 'left';
754 var secondarySide = isHoriz ? 'left' : 'top';
755 var measurement = isHoriz ? 'height' : 'width';
756 var secondaryMeasurement = !isHoriz ? 'height' : 'width';
757
758 popperOffsets[mainSide] = referenceOffsets[mainSide] + referenceOffsets[measurement] / 2 - popperRect[measurement] / 2;
759 if (placement === secondarySide) {
760 popperOffsets[secondarySide] = referenceOffsets[secondarySide] - popperRect[secondaryMeasurement];
761 } else {
762 popperOffsets[secondarySide] = referenceOffsets[getOppositePlacement(secondarySide)];
763 }
764
765 return popperOffsets;
766}
767
768/**
769 * Mimics the `find` method of Array
770 * @method
771 * @memberof Popper.Utils
772 * @argument {Array} arr
773 * @argument prop
774 * @argument value
775 * @returns index or -1
776 */
777function find(arr, check) {
778 // use native find if supported
779 if (Array.prototype.find) {
780 return arr.find(check);
781 }
782
783 // use `filter` to obtain the same behavior of `find`
784 return arr.filter(check)[0];
785}
786
787/**
788 * Return the index of the matching object
789 * @method
790 * @memberof Popper.Utils
791 * @argument {Array} arr
792 * @argument prop
793 * @argument value
794 * @returns index or -1
795 */
796function findIndex(arr, prop, value) {
797 // use native findIndex if supported
798 if (Array.prototype.findIndex) {
799 return arr.findIndex(function (cur) {
800 return cur[prop] === value;
801 });
802 }
803
804 // use `find` + `indexOf` if `findIndex` isn't supported
805 var match = find(arr, function (obj) {
806 return obj[prop] === value;
807 });
808 return arr.indexOf(match);
809}
810
811/**
812 * Loop trough the list of modifiers and run them in order,
813 * each of them will then edit the data object.
814 * @method
815 * @memberof Popper.Utils
816 * @param {dataObject} data
817 * @param {Array} modifiers
818 * @param {String} ends - Optional modifier name used as stopper
819 * @returns {dataObject}
820 */
821function runModifiers(modifiers, data, ends) {
822 var modifiersToRun = ends === undefined ? modifiers : modifiers.slice(0, findIndex(modifiers, 'name', ends));
823
824 modifiersToRun.forEach(function (modifier) {
825 if (modifier['function']) {
826 // eslint-disable-line dot-notation
827 console.warn('`modifier.function` is deprecated, use `modifier.fn`!');
828 }
829 var fn = modifier['function'] || modifier.fn; // eslint-disable-line dot-notation
830 if (modifier.enabled && isFunction(fn)) {
831 // Add properties to offsets to make them a complete clientRect object
832 // we do this before each modifier to make sure the previous one doesn't
833 // mess with these values
834 data.offsets.popper = getClientRect(data.offsets.popper);
835 data.offsets.reference = getClientRect(data.offsets.reference);
836
837 data = fn(data, modifier);
838 }
839 });
840
841 return data;
842}
843
844/**
845 * Updates the position of the popper, computing the new offsets and applying
846 * the new style.<br />
847 * Prefer `scheduleUpdate` over `update` because of performance reasons.
848 * @method
849 * @memberof Popper
850 */
851function update() {
852 // if popper is destroyed, don't perform any further update
853 if (this.state.isDestroyed) {
854 return;
855 }
856
857 var data = {
858 instance: this,
859 styles: {},
860 arrowStyles: {},
861 attributes: {},
862 flipped: false,
863 offsets: {}
864 };
865
866 // compute reference element offsets
867 data.offsets.reference = getReferenceOffsets(this.state, this.popper, this.reference);
868
869 // compute auto placement, store placement inside the data object,
870 // modifiers will be able to edit `placement` if needed
871 // and refer to originalPlacement to know the original value
872 data.placement = computeAutoPlacement(this.options.placement, data.offsets.reference, this.popper, this.reference, this.options.modifiers.flip.boundariesElement, this.options.modifiers.flip.padding);
873
874 // store the computed placement inside `originalPlacement`
875 data.originalPlacement = data.placement;
876
877 // compute the popper offsets
878 data.offsets.popper = getPopperOffsets(this.popper, data.offsets.reference, data.placement);
879 data.offsets.popper.position = 'absolute';
880
881 // run the modifiers
882 data = runModifiers(this.modifiers, data);
883
884 // the first `update` will call `onCreate` callback
885 // the other ones will call `onUpdate` callback
886 if (!this.state.isCreated) {
887 this.state.isCreated = true;
888 this.options.onCreate(data);
889 } else {
890 this.options.onUpdate(data);
891 }
892}
893
894/**
895 * Helper used to know if the given modifier is enabled.
896 * @method
897 * @memberof Popper.Utils
898 * @returns {Boolean}
899 */
900function isModifierEnabled(modifiers, modifierName) {
901 return modifiers.some(function (_ref) {
902 var name = _ref.name,
903 enabled = _ref.enabled;
904 return enabled && name === modifierName;
905 });
906}
907
908/**
909 * Get the prefixed supported property name
910 * @method
911 * @memberof Popper.Utils
912 * @argument {String} property (camelCase)
913 * @returns {String} prefixed property (camelCase or PascalCase, depending on the vendor prefix)
914 */
915function getSupportedPropertyName(property) {
916 var prefixes = [false, 'ms', 'Webkit', 'Moz', 'O'];
917 var upperProp = property.charAt(0).toUpperCase() + property.slice(1);
918
919 for (var i = 0; i < prefixes.length - 1; i++) {
920 var prefix = prefixes[i];
921 var toCheck = prefix ? '' + prefix + upperProp : property;
922 if (typeof document.body.style[toCheck] !== 'undefined') {
923 return toCheck;
924 }
925 }
926 return null;
927}
928
929/**
930 * Destroy the popper
931 * @method
932 * @memberof Popper
933 */
934function destroy() {
935 this.state.isDestroyed = true;
936
937 // touch DOM only if `applyStyle` modifier is enabled
938 if (isModifierEnabled(this.modifiers, 'applyStyle')) {
939 this.popper.removeAttribute('x-placement');
940 this.popper.style.left = '';
941 this.popper.style.position = '';
942 this.popper.style.top = '';
943 this.popper.style[getSupportedPropertyName('transform')] = '';
944 }
945
946 this.disableEventListeners();
947
948 // remove the popper if user explicity asked for the deletion on destroy
949 // do not use `remove` because IE11 doesn't support it
950 if (this.options.removeOnDestroy) {
951 this.popper.parentNode.removeChild(this.popper);
952 }
953 return this;
954}
955
956/**
957 * Get the window associated with the element
958 * @argument {Element} element
959 * @returns {Window}
960 */
961function getWindow(element) {
962 var ownerDocument = element.ownerDocument;
963 return ownerDocument ? ownerDocument.defaultView : window;
964}
965
966function attachToScrollParents(scrollParent, event, callback, scrollParents) {
967 var isBody = scrollParent.nodeName === 'BODY';
968 var target = isBody ? scrollParent.ownerDocument.defaultView : scrollParent;
969 target.addEventListener(event, callback, { passive: true });
970
971 if (!isBody) {
972 attachToScrollParents(getScrollParent(target.parentNode), event, callback, scrollParents);
973 }
974 scrollParents.push(target);
975}
976
977/**
978 * Setup needed event listeners used to update the popper position
979 * @method
980 * @memberof Popper.Utils
981 * @private
982 */
983function setupEventListeners(reference, options, state, updateBound) {
984 // Resize event listener on window
985 state.updateBound = updateBound;
986 getWindow(reference).addEventListener('resize', state.updateBound, { passive: true });
987
988 // Scroll event listener on scroll parents
989 var scrollElement = getScrollParent(reference);
990 attachToScrollParents(scrollElement, 'scroll', state.updateBound, state.scrollParents);
991 state.scrollElement = scrollElement;
992 state.eventsEnabled = true;
993
994 return state;
995}
996
997/**
998 * It will add resize/scroll events and start recalculating
999 * position of the popper element when they are triggered.
1000 * @method
1001 * @memberof Popper
1002 */
1003function enableEventListeners() {
1004 if (!this.state.eventsEnabled) {
1005 this.state = setupEventListeners(this.reference, this.options, this.state, this.scheduleUpdate);
1006 }
1007}
1008
1009/**
1010 * Remove event listeners used to update the popper position
1011 * @method
1012 * @memberof Popper.Utils
1013 * @private
1014 */
1015function removeEventListeners(reference, state) {
1016 // Remove resize event listener on window
1017 getWindow(reference).removeEventListener('resize', state.updateBound);
1018
1019 // Remove scroll event listener on scroll parents
1020 state.scrollParents.forEach(function (target) {
1021 target.removeEventListener('scroll', state.updateBound);
1022 });
1023
1024 // Reset state
1025 state.updateBound = null;
1026 state.scrollParents = [];
1027 state.scrollElement = null;
1028 state.eventsEnabled = false;
1029 return state;
1030}
1031
1032/**
1033 * It will remove resize/scroll events and won't recalculate popper position
1034 * when they are triggered. It also won't trigger onUpdate callback anymore,
1035 * unless you call `update` method manually.
1036 * @method
1037 * @memberof Popper
1038 */
1039function disableEventListeners() {
1040 if (this.state.eventsEnabled) {
1041 cancelAnimationFrame(this.scheduleUpdate);
1042 this.state = removeEventListeners(this.reference, this.state);
1043 }
1044}
1045
1046/**
1047 * Tells if a given input is a number
1048 * @method
1049 * @memberof Popper.Utils
1050 * @param {*} input to check
1051 * @return {Boolean}
1052 */
1053function isNumeric(n) {
1054 return n !== '' && !isNaN(parseFloat(n)) && isFinite(n);
1055}
1056
1057/**
1058 * Set the style to the given popper
1059 * @method
1060 * @memberof Popper.Utils
1061 * @argument {Element} element - Element to apply the style to
1062 * @argument {Object} styles
1063 * Object with a list of properties and values which will be applied to the element
1064 */
1065function setStyles(element, styles) {
1066 Object.keys(styles).forEach(function (prop) {
1067 var unit = '';
1068 // add unit if the value is numeric and is one of the following
1069 if (['width', 'height', 'top', 'right', 'bottom', 'left'].indexOf(prop) !== -1 && isNumeric(styles[prop])) {
1070 unit = 'px';
1071 }
1072 element.style[prop] = styles[prop] + unit;
1073 });
1074}
1075
1076/**
1077 * Set the attributes to the given popper
1078 * @method
1079 * @memberof Popper.Utils
1080 * @argument {Element} element - Element to apply the attributes to
1081 * @argument {Object} styles
1082 * Object with a list of properties and values which will be applied to the element
1083 */
1084function setAttributes(element, attributes) {
1085 Object.keys(attributes).forEach(function (prop) {
1086 var value = attributes[prop];
1087 if (value !== false) {
1088 element.setAttribute(prop, attributes[prop]);
1089 } else {
1090 element.removeAttribute(prop);
1091 }
1092 });
1093}
1094
1095/**
1096 * @function
1097 * @memberof Modifiers
1098 * @argument {Object} data - The data object generated by `update` method
1099 * @argument {Object} data.styles - List of style properties - values to apply to popper element
1100 * @argument {Object} data.attributes - List of attribute properties - values to apply to popper element
1101 * @argument {Object} options - Modifiers configuration and options
1102 * @returns {Object} The same data object
1103 */
1104function applyStyle(data) {
1105 // any property present in `data.styles` will be applied to the popper,
1106 // in this way we can make the 3rd party modifiers add custom styles to it
1107 // Be aware, modifiers could override the properties defined in the previous
1108 // lines of this modifier!
1109 setStyles(data.instance.popper, data.styles);
1110
1111 // any property present in `data.attributes` will be applied to the popper,
1112 // they will be set as HTML attributes of the element
1113 setAttributes(data.instance.popper, data.attributes);
1114
1115 // if arrowElement is defined and arrowStyles has some properties
1116 if (data.arrowElement && Object.keys(data.arrowStyles).length) {
1117 setStyles(data.arrowElement, data.arrowStyles);
1118 }
1119
1120 return data;
1121}
1122
1123/**
1124 * Set the x-placement attribute before everything else because it could be used
1125 * to add margins to the popper margins needs to be calculated to get the
1126 * correct popper offsets.
1127 * @method
1128 * @memberof Popper.modifiers
1129 * @param {HTMLElement} reference - The reference element used to position the popper
1130 * @param {HTMLElement} popper - The HTML element used as popper.
1131 * @param {Object} options - Popper.js options
1132 */
1133function applyStyleOnLoad(reference, popper, options, modifierOptions, state) {
1134 // compute reference element offsets
1135 var referenceOffsets = getReferenceOffsets(state, popper, reference);
1136
1137 // compute auto placement, store placement inside the data object,
1138 // modifiers will be able to edit `placement` if needed
1139 // and refer to originalPlacement to know the original value
1140 var placement = computeAutoPlacement(options.placement, referenceOffsets, popper, reference, options.modifiers.flip.boundariesElement, options.modifiers.flip.padding);
1141
1142 popper.setAttribute('x-placement', placement);
1143
1144 // Apply `position` to popper before anything else because
1145 // without the position applied we can't guarantee correct computations
1146 setStyles(popper, { position: 'absolute' });
1147
1148 return options;
1149}
1150
1151/**
1152 * @function
1153 * @memberof Modifiers
1154 * @argument {Object} data - The data object generated by `update` method
1155 * @argument {Object} options - Modifiers configuration and options
1156 * @returns {Object} The data object, properly modified
1157 */
1158function computeStyle(data, options) {
1159 var x = options.x,
1160 y = options.y;
1161 var popper = data.offsets.popper;
1162
1163 // Remove this legacy support in Popper.js v2
1164
1165 var legacyGpuAccelerationOption = find(data.instance.modifiers, function (modifier) {
1166 return modifier.name === 'applyStyle';
1167 }).gpuAcceleration;
1168 if (legacyGpuAccelerationOption !== undefined) {
1169 console.warn('WARNING: `gpuAcceleration` option moved to `computeStyle` modifier and will not be supported in future versions of Popper.js!');
1170 }
1171 var gpuAcceleration = legacyGpuAccelerationOption !== undefined ? legacyGpuAccelerationOption : options.gpuAcceleration;
1172
1173 var offsetParent = getOffsetParent(data.instance.popper);
1174 var offsetParentRect = getBoundingClientRect(offsetParent);
1175
1176 // Styles
1177 var styles = {
1178 position: popper.position
1179 };
1180
1181 // floor sides to avoid blurry text
1182 var offsets = {
1183 left: Math.floor(popper.left),
1184 top: Math.floor(popper.top),
1185 bottom: Math.floor(popper.bottom),
1186 right: Math.floor(popper.right)
1187 };
1188
1189 var sideA = x === 'bottom' ? 'top' : 'bottom';
1190 var sideB = y === 'right' ? 'left' : 'right';
1191
1192 // if gpuAcceleration is set to `true` and transform is supported,
1193 // we use `translate3d` to apply the position to the popper we
1194 // automatically use the supported prefixed version if needed
1195 var prefixedProperty = getSupportedPropertyName('transform');
1196
1197 // now, let's make a step back and look at this code closely (wtf?)
1198 // If the content of the popper grows once it's been positioned, it
1199 // may happen that the popper gets misplaced because of the new content
1200 // overflowing its reference element
1201 // To avoid this problem, we provide two options (x and y), which allow
1202 // the consumer to define the offset origin.
1203 // If we position a popper on top of a reference element, we can set
1204 // `x` to `top` to make the popper grow towards its top instead of
1205 // its bottom.
1206 var left = void 0,
1207 top = void 0;
1208 if (sideA === 'bottom') {
1209 top = -offsetParentRect.height + offsets.bottom;
1210 } else {
1211 top = offsets.top;
1212 }
1213 if (sideB === 'right') {
1214 left = -offsetParentRect.width + offsets.right;
1215 } else {
1216 left = offsets.left;
1217 }
1218 if (gpuAcceleration && prefixedProperty) {
1219 styles[prefixedProperty] = 'translate3d(' + left + 'px, ' + top + 'px, 0)';
1220 styles[sideA] = 0;
1221 styles[sideB] = 0;
1222 styles.willChange = 'transform';
1223 } else {
1224 // othwerise, we use the standard `top`, `left`, `bottom` and `right` properties
1225 var invertTop = sideA === 'bottom' ? -1 : 1;
1226 var invertLeft = sideB === 'right' ? -1 : 1;
1227 styles[sideA] = top * invertTop;
1228 styles[sideB] = left * invertLeft;
1229 styles.willChange = sideA + ', ' + sideB;
1230 }
1231
1232 // Attributes
1233 var attributes = {
1234 'x-placement': data.placement
1235 };
1236
1237 // Update `data` attributes, styles and arrowStyles
1238 data.attributes = _extends({}, attributes, data.attributes);
1239 data.styles = _extends({}, styles, data.styles);
1240 data.arrowStyles = _extends({}, data.offsets.arrow, data.arrowStyles);
1241
1242 return data;
1243}
1244
1245/**
1246 * Helper used to know if the given modifier depends from another one.<br />
1247 * It checks if the needed modifier is listed and enabled.
1248 * @method
1249 * @memberof Popper.Utils
1250 * @param {Array} modifiers - list of modifiers
1251 * @param {String} requestingName - name of requesting modifier
1252 * @param {String} requestedName - name of requested modifier
1253 * @returns {Boolean}
1254 */
1255function isModifierRequired(modifiers, requestingName, requestedName) {
1256 var requesting = find(modifiers, function (_ref) {
1257 var name = _ref.name;
1258 return name === requestingName;
1259 });
1260
1261 var isRequired = !!requesting && modifiers.some(function (modifier) {
1262 return modifier.name === requestedName && modifier.enabled && modifier.order < requesting.order;
1263 });
1264
1265 if (!isRequired) {
1266 var _requesting = '`' + requestingName + '`';
1267 var requested = '`' + requestedName + '`';
1268 console.warn(requested + ' modifier is required by ' + _requesting + ' modifier in order to work, be sure to include it before ' + _requesting + '!');
1269 }
1270 return isRequired;
1271}
1272
1273/**
1274 * @function
1275 * @memberof Modifiers
1276 * @argument {Object} data - The data object generated by update method
1277 * @argument {Object} options - Modifiers configuration and options
1278 * @returns {Object} The data object, properly modified
1279 */
1280function arrow(data, options) {
1281 var _data$offsets$arrow;
1282
1283 // arrow depends on keepTogether in order to work
1284 if (!isModifierRequired(data.instance.modifiers, 'arrow', 'keepTogether')) {
1285 return data;
1286 }
1287
1288 var arrowElement = options.element;
1289
1290 // if arrowElement is a string, suppose it's a CSS selector
1291 if (typeof arrowElement === 'string') {
1292 arrowElement = data.instance.popper.querySelector(arrowElement);
1293
1294 // if arrowElement is not found, don't run the modifier
1295 if (!arrowElement) {
1296 return data;
1297 }
1298 } else {
1299 // if the arrowElement isn't a query selector we must check that the
1300 // provided DOM node is child of its popper node
1301 if (!data.instance.popper.contains(arrowElement)) {
1302 console.warn('WARNING: `arrow.element` must be child of its popper element!');
1303 return data;
1304 }
1305 }
1306
1307 var placement = data.placement.split('-')[0];
1308 var _data$offsets = data.offsets,
1309 popper = _data$offsets.popper,
1310 reference = _data$offsets.reference;
1311
1312 var isVertical = ['left', 'right'].indexOf(placement) !== -1;
1313
1314 var len = isVertical ? 'height' : 'width';
1315 var sideCapitalized = isVertical ? 'Top' : 'Left';
1316 var side = sideCapitalized.toLowerCase();
1317 var altSide = isVertical ? 'left' : 'top';
1318 var opSide = isVertical ? 'bottom' : 'right';
1319 var arrowElementSize = getOuterSizes(arrowElement)[len];
1320
1321 //
1322 // extends keepTogether behavior making sure the popper and its
1323 // reference have enough pixels in conjuction
1324 //
1325
1326 // top/left side
1327 if (reference[opSide] - arrowElementSize < popper[side]) {
1328 data.offsets.popper[side] -= popper[side] - (reference[opSide] - arrowElementSize);
1329 }
1330 // bottom/right side
1331 if (reference[side] + arrowElementSize > popper[opSide]) {
1332 data.offsets.popper[side] += reference[side] + arrowElementSize - popper[opSide];
1333 }
1334 data.offsets.popper = getClientRect(data.offsets.popper);
1335
1336 // compute center of the popper
1337 var center = reference[side] + reference[len] / 2 - arrowElementSize / 2;
1338
1339 // Compute the sideValue using the updated popper offsets
1340 // take popper margin in account because we don't have this info available
1341 var css = getStyleComputedProperty(data.instance.popper);
1342 var popperMarginSide = parseFloat(css['margin' + sideCapitalized], 10);
1343 var popperBorderSide = parseFloat(css['border' + sideCapitalized + 'Width'], 10);
1344 var sideValue = center - data.offsets.popper[side] - popperMarginSide - popperBorderSide;
1345
1346 // prevent arrowElement from being placed not contiguously to its popper
1347 sideValue = Math.max(Math.min(popper[len] - arrowElementSize, sideValue), 0);
1348
1349 data.arrowElement = arrowElement;
1350 data.offsets.arrow = (_data$offsets$arrow = {}, defineProperty(_data$offsets$arrow, side, Math.round(sideValue)), defineProperty(_data$offsets$arrow, altSide, ''), _data$offsets$arrow);
1351
1352 return data;
1353}
1354
1355/**
1356 * Get the opposite placement variation of the given one
1357 * @method
1358 * @memberof Popper.Utils
1359 * @argument {String} placement variation
1360 * @returns {String} flipped placement variation
1361 */
1362function getOppositeVariation(variation) {
1363 if (variation === 'end') {
1364 return 'start';
1365 } else if (variation === 'start') {
1366 return 'end';
1367 }
1368 return variation;
1369}
1370
1371/**
1372 * List of accepted placements to use as values of the `placement` option.<br />
1373 * Valid placements are:
1374 * - `auto`
1375 * - `top`
1376 * - `right`
1377 * - `bottom`
1378 * - `left`
1379 *
1380 * Each placement can have a variation from this list:
1381 * - `-start`
1382 * - `-end`
1383 *
1384 * Variations are interpreted easily if you think of them as the left to right
1385 * written languages. Horizontally (`top` and `bottom`), `start` is left and `end`
1386 * is right.<br />
1387 * Vertically (`left` and `right`), `start` is top and `end` is bottom.
1388 *
1389 * Some valid examples are:
1390 * - `top-end` (on top of reference, right aligned)
1391 * - `right-start` (on right of reference, top aligned)
1392 * - `bottom` (on bottom, centered)
1393 * - `auto-right` (on the side with more space available, alignment depends by placement)
1394 *
1395 * @static
1396 * @type {Array}
1397 * @enum {String}
1398 * @readonly
1399 * @method placements
1400 * @memberof Popper
1401 */
1402var 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'];
1403
1404// Get rid of `auto` `auto-start` and `auto-end`
1405var validPlacements = placements.slice(3);
1406
1407/**
1408 * Given an initial placement, returns all the subsequent placements
1409 * clockwise (or counter-clockwise).
1410 *
1411 * @method
1412 * @memberof Popper.Utils
1413 * @argument {String} placement - A valid placement (it accepts variations)
1414 * @argument {Boolean} counter - Set to true to walk the placements counterclockwise
1415 * @returns {Array} placements including their variations
1416 */
1417function clockwise(placement) {
1418 var counter = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;
1419
1420 var index = validPlacements.indexOf(placement);
1421 var arr = validPlacements.slice(index + 1).concat(validPlacements.slice(0, index));
1422 return counter ? arr.reverse() : arr;
1423}
1424
1425var BEHAVIORS = {
1426 FLIP: 'flip',
1427 CLOCKWISE: 'clockwise',
1428 COUNTERCLOCKWISE: 'counterclockwise'
1429};
1430
1431/**
1432 * @function
1433 * @memberof Modifiers
1434 * @argument {Object} data - The data object generated by update method
1435 * @argument {Object} options - Modifiers configuration and options
1436 * @returns {Object} The data object, properly modified
1437 */
1438function flip(data, options) {
1439 // if `inner` modifier is enabled, we can't use the `flip` modifier
1440 if (isModifierEnabled(data.instance.modifiers, 'inner')) {
1441 return data;
1442 }
1443
1444 if (data.flipped && data.placement === data.originalPlacement) {
1445 // seems like flip is trying to loop, probably there's not enough space on any of the flippable sides
1446 return data;
1447 }
1448
1449 var boundaries = getBoundaries(data.instance.popper, data.instance.reference, options.padding, options.boundariesElement);
1450
1451 var placement = data.placement.split('-')[0];
1452 var placementOpposite = getOppositePlacement(placement);
1453 var variation = data.placement.split('-')[1] || '';
1454
1455 var flipOrder = [];
1456
1457 switch (options.behavior) {
1458 case BEHAVIORS.FLIP:
1459 flipOrder = [placement, placementOpposite];
1460 break;
1461 case BEHAVIORS.CLOCKWISE:
1462 flipOrder = clockwise(placement);
1463 break;
1464 case BEHAVIORS.COUNTERCLOCKWISE:
1465 flipOrder = clockwise(placement, true);
1466 break;
1467 default:
1468 flipOrder = options.behavior;
1469 }
1470
1471 flipOrder.forEach(function (step, index) {
1472 if (placement !== step || flipOrder.length === index + 1) {
1473 return data;
1474 }
1475
1476 placement = data.placement.split('-')[0];
1477 placementOpposite = getOppositePlacement(placement);
1478
1479 var popperOffsets = data.offsets.popper;
1480 var refOffsets = data.offsets.reference;
1481
1482 // using floor because the reference offsets may contain decimals we are not going to consider here
1483 var floor = Math.floor;
1484 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);
1485
1486 var overflowsLeft = floor(popperOffsets.left) < floor(boundaries.left);
1487 var overflowsRight = floor(popperOffsets.right) > floor(boundaries.right);
1488 var overflowsTop = floor(popperOffsets.top) < floor(boundaries.top);
1489 var overflowsBottom = floor(popperOffsets.bottom) > floor(boundaries.bottom);
1490
1491 var overflowsBoundaries = placement === 'left' && overflowsLeft || placement === 'right' && overflowsRight || placement === 'top' && overflowsTop || placement === 'bottom' && overflowsBottom;
1492
1493 // flip the variation if required
1494 var isVertical = ['top', 'bottom'].indexOf(placement) !== -1;
1495 var flippedVariation = !!options.flipVariations && (isVertical && variation === 'start' && overflowsLeft || isVertical && variation === 'end' && overflowsRight || !isVertical && variation === 'start' && overflowsTop || !isVertical && variation === 'end' && overflowsBottom);
1496
1497 if (overlapsRef || overflowsBoundaries || flippedVariation) {
1498 // this boolean to detect any flip loop
1499 data.flipped = true;
1500
1501 if (overlapsRef || overflowsBoundaries) {
1502 placement = flipOrder[index + 1];
1503 }
1504
1505 if (flippedVariation) {
1506 variation = getOppositeVariation(variation);
1507 }
1508
1509 data.placement = placement + (variation ? '-' + variation : '');
1510
1511 // this object contains `position`, we want to preserve it along with
1512 // any additional property we may add in the future
1513 data.offsets.popper = _extends({}, data.offsets.popper, getPopperOffsets(data.instance.popper, data.offsets.reference, data.placement));
1514
1515 data = runModifiers(data.instance.modifiers, data, 'flip');
1516 }
1517 });
1518 return data;
1519}
1520
1521/**
1522 * @function
1523 * @memberof Modifiers
1524 * @argument {Object} data - The data object generated by update method
1525 * @argument {Object} options - Modifiers configuration and options
1526 * @returns {Object} The data object, properly modified
1527 */
1528function keepTogether(data) {
1529 var _data$offsets = data.offsets,
1530 popper = _data$offsets.popper,
1531 reference = _data$offsets.reference;
1532
1533 var placement = data.placement.split('-')[0];
1534 var floor = Math.floor;
1535 var isVertical = ['top', 'bottom'].indexOf(placement) !== -1;
1536 var side = isVertical ? 'right' : 'bottom';
1537 var opSide = isVertical ? 'left' : 'top';
1538 var measurement = isVertical ? 'width' : 'height';
1539
1540 if (popper[side] < floor(reference[opSide])) {
1541 data.offsets.popper[opSide] = floor(reference[opSide]) - popper[measurement];
1542 }
1543 if (popper[opSide] > floor(reference[side])) {
1544 data.offsets.popper[opSide] = floor(reference[side]);
1545 }
1546
1547 return data;
1548}
1549
1550/**
1551 * Converts a string containing value + unit into a px value number
1552 * @function
1553 * @memberof {modifiers~offset}
1554 * @private
1555 * @argument {String} str - Value + unit string
1556 * @argument {String} measurement - `height` or `width`
1557 * @argument {Object} popperOffsets
1558 * @argument {Object} referenceOffsets
1559 * @returns {Number|String}
1560 * Value in pixels, or original string if no values were extracted
1561 */
1562function toValue(str, measurement, popperOffsets, referenceOffsets) {
1563 // separate value from unit
1564 var split = str.match(/((?:\-|\+)?\d*\.?\d*)(.*)/);
1565 var value = +split[1];
1566 var unit = split[2];
1567
1568 // If it's not a number it's an operator, I guess
1569 if (!value) {
1570 return str;
1571 }
1572
1573 if (unit.indexOf('%') === 0) {
1574 var element = void 0;
1575 switch (unit) {
1576 case '%p':
1577 element = popperOffsets;
1578 break;
1579 case '%':
1580 case '%r':
1581 default:
1582 element = referenceOffsets;
1583 }
1584
1585 var rect = getClientRect(element);
1586 return rect[measurement] / 100 * value;
1587 } else if (unit === 'vh' || unit === 'vw') {
1588 // if is a vh or vw, we calculate the size based on the viewport
1589 var size = void 0;
1590 if (unit === 'vh') {
1591 size = Math.max(document.documentElement.clientHeight, window.innerHeight || 0);
1592 } else {
1593 size = Math.max(document.documentElement.clientWidth, window.innerWidth || 0);
1594 }
1595 return size / 100 * value;
1596 } else {
1597 // if is an explicit pixel unit, we get rid of the unit and keep the value
1598 // if is an implicit unit, it's px, and we return just the value
1599 return value;
1600 }
1601}
1602
1603/**
1604 * Parse an `offset` string to extrapolate `x` and `y` numeric offsets.
1605 * @function
1606 * @memberof {modifiers~offset}
1607 * @private
1608 * @argument {String} offset
1609 * @argument {Object} popperOffsets
1610 * @argument {Object} referenceOffsets
1611 * @argument {String} basePlacement
1612 * @returns {Array} a two cells array with x and y offsets in numbers
1613 */
1614function parseOffset(offset, popperOffsets, referenceOffsets, basePlacement) {
1615 var offsets = [0, 0];
1616
1617 // Use height if placement is left or right and index is 0 otherwise use width
1618 // in this way the first offset will use an axis and the second one
1619 // will use the other one
1620 var useHeight = ['right', 'left'].indexOf(basePlacement) !== -1;
1621
1622 // Split the offset string to obtain a list of values and operands
1623 // The regex addresses values with the plus or minus sign in front (+10, -20, etc)
1624 var fragments = offset.split(/(\+|\-)/).map(function (frag) {
1625 return frag.trim();
1626 });
1627
1628 // Detect if the offset string contains a pair of values or a single one
1629 // they could be separated by comma or space
1630 var divider = fragments.indexOf(find(fragments, function (frag) {
1631 return frag.search(/,|\s/) !== -1;
1632 }));
1633
1634 if (fragments[divider] && fragments[divider].indexOf(',') === -1) {
1635 console.warn('Offsets separated by white space(s) are deprecated, use a comma (,) instead.');
1636 }
1637
1638 // If divider is found, we divide the list of values and operands to divide
1639 // them by ofset X and Y.
1640 var splitRegex = /\s*,\s*|\s+/;
1641 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];
1642
1643 // Convert the values with units to absolute pixels to allow our computations
1644 ops = ops.map(function (op, index) {
1645 // Most of the units rely on the orientation of the popper
1646 var measurement = (index === 1 ? !useHeight : useHeight) ? 'height' : 'width';
1647 var mergeWithPrevious = false;
1648 return op
1649 // This aggregates any `+` or `-` sign that aren't considered operators
1650 // e.g.: 10 + +5 => [10, +, +5]
1651 .reduce(function (a, b) {
1652 if (a[a.length - 1] === '' && ['+', '-'].indexOf(b) !== -1) {
1653 a[a.length - 1] = b;
1654 mergeWithPrevious = true;
1655 return a;
1656 } else if (mergeWithPrevious) {
1657 a[a.length - 1] += b;
1658 mergeWithPrevious = false;
1659 return a;
1660 } else {
1661 return a.concat(b);
1662 }
1663 }, [])
1664 // Here we convert the string values into number values (in px)
1665 .map(function (str) {
1666 return toValue(str, measurement, popperOffsets, referenceOffsets);
1667 });
1668 });
1669
1670 // Loop trough the offsets arrays and execute the operations
1671 ops.forEach(function (op, index) {
1672 op.forEach(function (frag, index2) {
1673 if (isNumeric(frag)) {
1674 offsets[index] += frag * (op[index2 - 1] === '-' ? -1 : 1);
1675 }
1676 });
1677 });
1678 return offsets;
1679}
1680
1681/**
1682 * @function
1683 * @memberof Modifiers
1684 * @argument {Object} data - The data object generated by update method
1685 * @argument {Object} options - Modifiers configuration and options
1686 * @argument {Number|String} options.offset=0
1687 * The offset value as described in the modifier description
1688 * @returns {Object} The data object, properly modified
1689 */
1690function offset(data, _ref) {
1691 var offset = _ref.offset;
1692 var placement = data.placement,
1693 _data$offsets = data.offsets,
1694 popper = _data$offsets.popper,
1695 reference = _data$offsets.reference;
1696
1697 var basePlacement = placement.split('-')[0];
1698
1699 var offsets = void 0;
1700 if (isNumeric(+offset)) {
1701 offsets = [+offset, 0];
1702 } else {
1703 offsets = parseOffset(offset, popper, reference, basePlacement);
1704 }
1705
1706 if (basePlacement === 'left') {
1707 popper.top += offsets[0];
1708 popper.left -= offsets[1];
1709 } else if (basePlacement === 'right') {
1710 popper.top += offsets[0];
1711 popper.left += offsets[1];
1712 } else if (basePlacement === 'top') {
1713 popper.left += offsets[0];
1714 popper.top -= offsets[1];
1715 } else if (basePlacement === 'bottom') {
1716 popper.left += offsets[0];
1717 popper.top += offsets[1];
1718 }
1719
1720 data.popper = popper;
1721 return data;
1722}
1723
1724/**
1725 * @function
1726 * @memberof Modifiers
1727 * @argument {Object} data - The data object generated by `update` method
1728 * @argument {Object} options - Modifiers configuration and options
1729 * @returns {Object} The data object, properly modified
1730 */
1731function preventOverflow(data, options) {
1732 var boundariesElement = options.boundariesElement || getOffsetParent(data.instance.popper);
1733
1734 // If offsetParent is the reference element, we really want to
1735 // go one step up and use the next offsetParent as reference to
1736 // avoid to make this modifier completely useless and look like broken
1737 if (data.instance.reference === boundariesElement) {
1738 boundariesElement = getOffsetParent(boundariesElement);
1739 }
1740
1741 var boundaries = getBoundaries(data.instance.popper, data.instance.reference, options.padding, boundariesElement);
1742 options.boundaries = boundaries;
1743
1744 var order = options.priority;
1745 var popper = data.offsets.popper;
1746
1747 var check = {
1748 primary: function primary(placement) {
1749 var value = popper[placement];
1750 if (popper[placement] < boundaries[placement] && !options.escapeWithReference) {
1751 value = Math.max(popper[placement], boundaries[placement]);
1752 }
1753 return defineProperty({}, placement, value);
1754 },
1755 secondary: function secondary(placement) {
1756 var mainSide = placement === 'right' ? 'left' : 'top';
1757 var value = popper[mainSide];
1758 if (popper[placement] > boundaries[placement] && !options.escapeWithReference) {
1759 value = Math.min(popper[mainSide], boundaries[placement] - (placement === 'right' ? popper.width : popper.height));
1760 }
1761 return defineProperty({}, mainSide, value);
1762 }
1763 };
1764
1765 order.forEach(function (placement) {
1766 var side = ['left', 'top'].indexOf(placement) !== -1 ? 'primary' : 'secondary';
1767 popper = _extends({}, popper, check[side](placement));
1768 });
1769
1770 data.offsets.popper = popper;
1771
1772 return data;
1773}
1774
1775/**
1776 * @function
1777 * @memberof Modifiers
1778 * @argument {Object} data - The data object generated by `update` method
1779 * @argument {Object} options - Modifiers configuration and options
1780 * @returns {Object} The data object, properly modified
1781 */
1782function shift(data) {
1783 var placement = data.placement;
1784 var basePlacement = placement.split('-')[0];
1785 var shiftvariation = placement.split('-')[1];
1786
1787 // if shift shiftvariation is specified, run the modifier
1788 if (shiftvariation) {
1789 var _data$offsets = data.offsets,
1790 reference = _data$offsets.reference,
1791 popper = _data$offsets.popper;
1792
1793 var isVertical = ['bottom', 'top'].indexOf(basePlacement) !== -1;
1794 var side = isVertical ? 'left' : 'top';
1795 var measurement = isVertical ? 'width' : 'height';
1796
1797 var shiftOffsets = {
1798 start: defineProperty({}, side, reference[side]),
1799 end: defineProperty({}, side, reference[side] + reference[measurement] - popper[measurement])
1800 };
1801
1802 data.offsets.popper = _extends({}, popper, shiftOffsets[shiftvariation]);
1803 }
1804
1805 return data;
1806}
1807
1808/**
1809 * @function
1810 * @memberof Modifiers
1811 * @argument {Object} data - The data object generated by update method
1812 * @argument {Object} options - Modifiers configuration and options
1813 * @returns {Object} The data object, properly modified
1814 */
1815function hide(data) {
1816 if (!isModifierRequired(data.instance.modifiers, 'hide', 'preventOverflow')) {
1817 return data;
1818 }
1819
1820 var refRect = data.offsets.reference;
1821 var bound = find(data.instance.modifiers, function (modifier) {
1822 return modifier.name === 'preventOverflow';
1823 }).boundaries;
1824
1825 if (refRect.bottom < bound.top || refRect.left > bound.right || refRect.top > bound.bottom || refRect.right < bound.left) {
1826 // Avoid unnecessary DOM access if visibility hasn't changed
1827 if (data.hide === true) {
1828 return data;
1829 }
1830
1831 data.hide = true;
1832 data.attributes['x-out-of-boundaries'] = '';
1833 } else {
1834 // Avoid unnecessary DOM access if visibility hasn't changed
1835 if (data.hide === false) {
1836 return data;
1837 }
1838
1839 data.hide = false;
1840 data.attributes['x-out-of-boundaries'] = false;
1841 }
1842
1843 return data;
1844}
1845
1846/**
1847 * @function
1848 * @memberof Modifiers
1849 * @argument {Object} data - The data object generated by `update` method
1850 * @argument {Object} options - Modifiers configuration and options
1851 * @returns {Object} The data object, properly modified
1852 */
1853function inner(data) {
1854 var placement = data.placement;
1855 var basePlacement = placement.split('-')[0];
1856 var _data$offsets = data.offsets,
1857 popper = _data$offsets.popper,
1858 reference = _data$offsets.reference;
1859
1860 var isHoriz = ['left', 'right'].indexOf(basePlacement) !== -1;
1861
1862 var subtractLength = ['top', 'left'].indexOf(basePlacement) === -1;
1863
1864 popper[isHoriz ? 'left' : 'top'] = reference[basePlacement] - (subtractLength ? popper[isHoriz ? 'width' : 'height'] : 0);
1865
1866 data.placement = getOppositePlacement(placement);
1867 data.offsets.popper = getClientRect(popper);
1868
1869 return data;
1870}
1871
1872/**
1873 * Modifier function, each modifier can have a function of this type assigned
1874 * to its `fn` property.<br />
1875 * These functions will be called on each update, this means that you must
1876 * make sure they are performant enough to avoid performance bottlenecks.
1877 *
1878 * @function ModifierFn
1879 * @argument {dataObject} data - The data object generated by `update` method
1880 * @argument {Object} options - Modifiers configuration and options
1881 * @returns {dataObject} The data object, properly modified
1882 */
1883
1884/**
1885 * Modifiers are plugins used to alter the behavior of your poppers.<br />
1886 * Popper.js uses a set of 9 modifiers to provide all the basic functionalities
1887 * needed by the library.
1888 *
1889 * Usually you don't want to override the `order`, `fn` and `onLoad` props.
1890 * All the other properties are configurations that could be tweaked.
1891 * @namespace modifiers
1892 */
1893var modifiers = {
1894 /**
1895 * Modifier used to shift the popper on the start or end of its reference
1896 * element.<br />
1897 * It will read the variation of the `placement` property.<br />
1898 * It can be one either `-end` or `-start`.
1899 * @memberof modifiers
1900 * @inner
1901 */
1902 shift: {
1903 /** @prop {number} order=100 - Index used to define the order of execution */
1904 order: 100,
1905 /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
1906 enabled: true,
1907 /** @prop {ModifierFn} */
1908 fn: shift
1909 },
1910
1911 /**
1912 * The `offset` modifier can shift your popper on both its axis.
1913 *
1914 * It accepts the following units:
1915 * - `px` or unitless, interpreted as pixels
1916 * - `%` or `%r`, percentage relative to the length of the reference element
1917 * - `%p`, percentage relative to the length of the popper element
1918 * - `vw`, CSS viewport width unit
1919 * - `vh`, CSS viewport height unit
1920 *
1921 * For length is intended the main axis relative to the placement of the popper.<br />
1922 * This means that if the placement is `top` or `bottom`, the length will be the
1923 * `width`. In case of `left` or `right`, it will be the height.
1924 *
1925 * You can provide a single value (as `Number` or `String`), or a pair of values
1926 * as `String` divided by a comma or one (or more) white spaces.<br />
1927 * The latter is a deprecated method because it leads to confusion and will be
1928 * removed in v2.<br />
1929 * Additionally, it accepts additions and subtractions between different units.
1930 * Note that multiplications and divisions aren't supported.
1931 *
1932 * Valid examples are:
1933 * ```
1934 * 10
1935 * '10%'
1936 * '10, 10'
1937 * '10%, 10'
1938 * '10 + 10%'
1939 * '10 - 5vh + 3%'
1940 * '-10px + 5vh, 5px - 6%'
1941 * ```
1942 * > **NB**: If you desire to apply offsets to your poppers in a way that may make them overlap
1943 * > with their reference element, unfortunately, you will have to disable the `flip` modifier.
1944 * > More on this [reading this issue](https://github.com/FezVrasta/popper.js/issues/373)
1945 *
1946 * @memberof modifiers
1947 * @inner
1948 */
1949 offset: {
1950 /** @prop {number} order=200 - Index used to define the order of execution */
1951 order: 200,
1952 /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
1953 enabled: true,
1954 /** @prop {ModifierFn} */
1955 fn: offset,
1956 /** @prop {Number|String} offset=0
1957 * The offset value as described in the modifier description
1958 */
1959 offset: 0
1960 },
1961
1962 /**
1963 * Modifier used to prevent the popper from being positioned outside the boundary.
1964 *
1965 * An scenario exists where the reference itself is not within the boundaries.<br />
1966 * We can say it has "escaped the boundaries" — or just "escaped".<br />
1967 * In this case we need to decide whether the popper should either:
1968 *
1969 * - detach from the reference and remain "trapped" in the boundaries, or
1970 * - if it should ignore the boundary and "escape with its reference"
1971 *
1972 * When `escapeWithReference` is set to`true` and reference is completely
1973 * outside its boundaries, the popper will overflow (or completely leave)
1974 * the boundaries in order to remain attached to the edge of the reference.
1975 *
1976 * @memberof modifiers
1977 * @inner
1978 */
1979 preventOverflow: {
1980 /** @prop {number} order=300 - Index used to define the order of execution */
1981 order: 300,
1982 /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
1983 enabled: true,
1984 /** @prop {ModifierFn} */
1985 fn: preventOverflow,
1986 /**
1987 * @prop {Array} [priority=['left','right','top','bottom']]
1988 * Popper will try to prevent overflow following these priorities by default,
1989 * then, it could overflow on the left and on top of the `boundariesElement`
1990 */
1991 priority: ['left', 'right', 'top', 'bottom'],
1992 /**
1993 * @prop {number} padding=5
1994 * Amount of pixel used to define a minimum distance between the boundaries
1995 * and the popper this makes sure the popper has always a little padding
1996 * between the edges of its container
1997 */
1998 padding: 5,
1999 /**
2000 * @prop {String|HTMLElement} boundariesElement='scrollParent'
2001 * Boundaries used by the modifier, can be `scrollParent`, `window`,
2002 * `viewport` or any DOM element.
2003 */
2004 boundariesElement: 'scrollParent'
2005 },
2006
2007 /**
2008 * Modifier used to make sure the reference and its popper stay near eachothers
2009 * without leaving any gap between the two. Expecially useful when the arrow is
2010 * enabled and you want to assure it to point to its reference element.
2011 * It cares only about the first axis, you can still have poppers with margin
2012 * between the popper and its reference element.
2013 * @memberof modifiers
2014 * @inner
2015 */
2016 keepTogether: {
2017 /** @prop {number} order=400 - Index used to define the order of execution */
2018 order: 400,
2019 /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
2020 enabled: true,
2021 /** @prop {ModifierFn} */
2022 fn: keepTogether
2023 },
2024
2025 /**
2026 * This modifier is used to move the `arrowElement` of the popper to make
2027 * sure it is positioned between the reference element and its popper element.
2028 * It will read the outer size of the `arrowElement` node to detect how many
2029 * pixels of conjuction are needed.
2030 *
2031 * It has no effect if no `arrowElement` is provided.
2032 * @memberof modifiers
2033 * @inner
2034 */
2035 arrow: {
2036 /** @prop {number} order=500 - Index used to define the order of execution */
2037 order: 500,
2038 /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
2039 enabled: true,
2040 /** @prop {ModifierFn} */
2041 fn: arrow,
2042 /** @prop {String|HTMLElement} element='[x-arrow]' - Selector or node used as arrow */
2043 element: '[x-arrow]'
2044 },
2045
2046 /**
2047 * Modifier used to flip the popper's placement when it starts to overlap its
2048 * reference element.
2049 *
2050 * Requires the `preventOverflow` modifier before it in order to work.
2051 *
2052 * **NOTE:** this modifier will interrupt the current update cycle and will
2053 * restart it if it detects the need to flip the placement.
2054 * @memberof modifiers
2055 * @inner
2056 */
2057 flip: {
2058 /** @prop {number} order=600 - Index used to define the order of execution */
2059 order: 600,
2060 /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
2061 enabled: true,
2062 /** @prop {ModifierFn} */
2063 fn: flip,
2064 /**
2065 * @prop {String|Array} behavior='flip'
2066 * The behavior used to change the popper's placement. It can be one of
2067 * `flip`, `clockwise`, `counterclockwise` or an array with a list of valid
2068 * placements (with optional variations).
2069 */
2070 behavior: 'flip',
2071 /**
2072 * @prop {number} padding=5
2073 * The popper will flip if it hits the edges of the `boundariesElement`
2074 */
2075 padding: 5,
2076 /**
2077 * @prop {String|HTMLElement} boundariesElement='viewport'
2078 * The element which will define the boundaries of the popper position,
2079 * the popper will never be placed outside of the defined boundaries
2080 * (except if keepTogether is enabled)
2081 */
2082 boundariesElement: 'viewport'
2083 },
2084
2085 /**
2086 * Modifier used to make the popper flow toward the inner of the reference element.
2087 * By default, when this modifier is disabled, the popper will be placed outside
2088 * the reference element.
2089 * @memberof modifiers
2090 * @inner
2091 */
2092 inner: {
2093 /** @prop {number} order=700 - Index used to define the order of execution */
2094 order: 700,
2095 /** @prop {Boolean} enabled=false - Whether the modifier is enabled or not */
2096 enabled: false,
2097 /** @prop {ModifierFn} */
2098 fn: inner
2099 },
2100
2101 /**
2102 * Modifier used to hide the popper when its reference element is outside of the
2103 * popper boundaries. It will set a `x-out-of-boundaries` attribute which can
2104 * be used to hide with a CSS selector the popper when its reference is
2105 * out of boundaries.
2106 *
2107 * Requires the `preventOverflow` modifier before it in order to work.
2108 * @memberof modifiers
2109 * @inner
2110 */
2111 hide: {
2112 /** @prop {number} order=800 - Index used to define the order of execution */
2113 order: 800,
2114 /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
2115 enabled: true,
2116 /** @prop {ModifierFn} */
2117 fn: hide
2118 },
2119
2120 /**
2121 * Computes the style that will be applied to the popper element to gets
2122 * properly positioned.
2123 *
2124 * Note that this modifier will not touch the DOM, it just prepares the styles
2125 * so that `applyStyle` modifier can apply it. This separation is useful
2126 * in case you need to replace `applyStyle` with a custom implementation.
2127 *
2128 * This modifier has `850` as `order` value to maintain backward compatibility
2129 * with previous versions of Popper.js. Expect the modifiers ordering method
2130 * to change in future major versions of the library.
2131 *
2132 * @memberof modifiers
2133 * @inner
2134 */
2135 computeStyle: {
2136 /** @prop {number} order=850 - Index used to define the order of execution */
2137 order: 850,
2138 /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
2139 enabled: true,
2140 /** @prop {ModifierFn} */
2141 fn: computeStyle,
2142 /**
2143 * @prop {Boolean} gpuAcceleration=true
2144 * If true, it uses the CSS 3d transformation to position the popper.
2145 * Otherwise, it will use the `top` and `left` properties.
2146 */
2147 gpuAcceleration: true,
2148 /**
2149 * @prop {string} [x='bottom']
2150 * Where to anchor the X axis (`bottom` or `top`). AKA X offset origin.
2151 * Change this if your popper should grow in a direction different from `bottom`
2152 */
2153 x: 'bottom',
2154 /**
2155 * @prop {string} [x='left']
2156 * Where to anchor the Y axis (`left` or `right`). AKA Y offset origin.
2157 * Change this if your popper should grow in a direction different from `right`
2158 */
2159 y: 'right'
2160 },
2161
2162 /**
2163 * Applies the computed styles to the popper element.
2164 *
2165 * All the DOM manipulations are limited to this modifier. This is useful in case
2166 * you want to integrate Popper.js inside a framework or view library and you
2167 * want to delegate all the DOM manipulations to it.
2168 *
2169 * Note that if you disable this modifier, you must make sure the popper element
2170 * has its position set to `absolute` before Popper.js can do its work!
2171 *
2172 * Just disable this modifier and define you own to achieve the desired effect.
2173 *
2174 * @memberof modifiers
2175 * @inner
2176 */
2177 applyStyle: {
2178 /** @prop {number} order=900 - Index used to define the order of execution */
2179 order: 900,
2180 /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
2181 enabled: true,
2182 /** @prop {ModifierFn} */
2183 fn: applyStyle,
2184 /** @prop {Function} */
2185 onLoad: applyStyleOnLoad,
2186 /**
2187 * @deprecated since version 1.10.0, the property moved to `computeStyle` modifier
2188 * @prop {Boolean} gpuAcceleration=true
2189 * If true, it uses the CSS 3d transformation to position the popper.
2190 * Otherwise, it will use the `top` and `left` properties.
2191 */
2192 gpuAcceleration: undefined
2193 }
2194};
2195
2196/**
2197 * The `dataObject` is an object containing all the informations used by Popper.js
2198 * this object get passed to modifiers and to the `onCreate` and `onUpdate` callbacks.
2199 * @name dataObject
2200 * @property {Object} data.instance The Popper.js instance
2201 * @property {String} data.placement Placement applied to popper
2202 * @property {String} data.originalPlacement Placement originally defined on init
2203 * @property {Boolean} data.flipped True if popper has been flipped by flip modifier
2204 * @property {Boolean} data.hide True if the reference element is out of boundaries, useful to know when to hide the popper.
2205 * @property {HTMLElement} data.arrowElement Node used as arrow by arrow modifier
2206 * @property {Object} data.styles Any CSS property defined here will be applied to the popper, it expects the JavaScript nomenclature (eg. `marginBottom`)
2207 * @property {Object} data.arrowStyles Any CSS property defined here will be applied to the popper arrow, it expects the JavaScript nomenclature (eg. `marginBottom`)
2208 * @property {Object} data.boundaries Offsets of the popper boundaries
2209 * @property {Object} data.offsets The measurements of popper, reference and arrow elements.
2210 * @property {Object} data.offsets.popper `top`, `left`, `width`, `height` values
2211 * @property {Object} data.offsets.reference `top`, `left`, `width`, `height` values
2212 * @property {Object} data.offsets.arrow] `top` and `left` offsets, only one of them will be different from 0
2213 */
2214
2215/**
2216 * Default options provided to Popper.js constructor.<br />
2217 * These can be overriden using the `options` argument of Popper.js.<br />
2218 * To override an option, simply pass as 3rd argument an object with the same
2219 * structure of this object, example:
2220 * ```
2221 * new Popper(ref, pop, {
2222 * modifiers: {
2223 * preventOverflow: { enabled: false }
2224 * }
2225 * })
2226 * ```
2227 * @type {Object}
2228 * @static
2229 * @memberof Popper
2230 */
2231var Defaults = {
2232 /**
2233 * Popper's placement
2234 * @prop {Popper.placements} placement='bottom'
2235 */
2236 placement: 'bottom',
2237
2238 /**
2239 * Whether events (resize, scroll) are initially enabled
2240 * @prop {Boolean} eventsEnabled=true
2241 */
2242 eventsEnabled: true,
2243
2244 /**
2245 * Set to true if you want to automatically remove the popper when
2246 * you call the `destroy` method.
2247 * @prop {Boolean} removeOnDestroy=false
2248 */
2249 removeOnDestroy: false,
2250
2251 /**
2252 * Callback called when the popper is created.<br />
2253 * By default, is set to no-op.<br />
2254 * Access Popper.js instance with `data.instance`.
2255 * @prop {onCreate}
2256 */
2257 onCreate: function onCreate() {},
2258
2259 /**
2260 * Callback called when the popper is updated, this callback is not called
2261 * on the initialization/creation of the popper, but only on subsequent
2262 * updates.<br />
2263 * By default, is set to no-op.<br />
2264 * Access Popper.js instance with `data.instance`.
2265 * @prop {onUpdate}
2266 */
2267 onUpdate: function onUpdate() {},
2268
2269 /**
2270 * List of modifiers used to modify the offsets before they are applied to the popper.
2271 * They provide most of the functionalities of Popper.js
2272 * @prop {modifiers}
2273 */
2274 modifiers: modifiers
2275};
2276
2277/**
2278 * @callback onCreate
2279 * @param {dataObject} data
2280 */
2281
2282/**
2283 * @callback onUpdate
2284 * @param {dataObject} data
2285 */
2286
2287// Utils
2288// Methods
2289var Popper = function () {
2290 /**
2291 * Create a new Popper.js instance
2292 * @class Popper
2293 * @param {HTMLElement|referenceObject} reference - The reference element used to position the popper
2294 * @param {HTMLElement} popper - The HTML element used as popper.
2295 * @param {Object} options - Your custom options to override the ones defined in [Defaults](#defaults)
2296 * @return {Object} instance - The generated Popper.js instance
2297 */
2298 function Popper(reference, popper) {
2299 var _this = this;
2300
2301 var options = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};
2302 classCallCheck(this, Popper);
2303
2304 this.scheduleUpdate = function () {
2305 return requestAnimationFrame(_this.update);
2306 };
2307
2308 // make update() debounced, so that it only runs at most once-per-tick
2309 this.update = debounce(this.update.bind(this));
2310
2311 // with {} we create a new object with the options inside it
2312 this.options = _extends({}, Popper.Defaults, options);
2313
2314 // init state
2315 this.state = {
2316 isDestroyed: false,
2317 isCreated: false,
2318 scrollParents: []
2319 };
2320
2321 // get reference and popper elements (allow jQuery wrappers)
2322 this.reference = reference && reference.jquery ? reference[0] : reference;
2323 this.popper = popper && popper.jquery ? popper[0] : popper;
2324
2325 // Deep merge modifiers options
2326 this.options.modifiers = {};
2327 Object.keys(_extends({}, Popper.Defaults.modifiers, options.modifiers)).forEach(function (name) {
2328 _this.options.modifiers[name] = _extends({}, Popper.Defaults.modifiers[name] || {}, options.modifiers ? options.modifiers[name] : {});
2329 });
2330
2331 // Refactoring modifiers' list (Object => Array)
2332 this.modifiers = Object.keys(this.options.modifiers).map(function (name) {
2333 return _extends({
2334 name: name
2335 }, _this.options.modifiers[name]);
2336 })
2337 // sort the modifiers by order
2338 .sort(function (a, b) {
2339 return a.order - b.order;
2340 });
2341
2342 // modifiers have the ability to execute arbitrary code when Popper.js get inited
2343 // such code is executed in the same order of its modifier
2344 // they could add new properties to their options configuration
2345 // BE AWARE: don't add options to `options.modifiers.name` but to `modifierOptions`!
2346 this.modifiers.forEach(function (modifierOptions) {
2347 if (modifierOptions.enabled && isFunction(modifierOptions.onLoad)) {
2348 modifierOptions.onLoad(_this.reference, _this.popper, _this.options, modifierOptions, _this.state);
2349 }
2350 });
2351
2352 // fire the first update to position the popper in the right place
2353 this.update();
2354
2355 var eventsEnabled = this.options.eventsEnabled;
2356 if (eventsEnabled) {
2357 // setup event listeners, they will take care of update the position in specific situations
2358 this.enableEventListeners();
2359 }
2360
2361 this.state.eventsEnabled = eventsEnabled;
2362 }
2363
2364 // We can't use class properties because they don't get listed in the
2365 // class prototype and break stuff like Sinon stubs
2366
2367
2368 createClass(Popper, [{
2369 key: 'update',
2370 value: function update$$1() {
2371 return update.call(this);
2372 }
2373 }, {
2374 key: 'destroy',
2375 value: function destroy$$1() {
2376 return destroy.call(this);
2377 }
2378 }, {
2379 key: 'enableEventListeners',
2380 value: function enableEventListeners$$1() {
2381 return enableEventListeners.call(this);
2382 }
2383 }, {
2384 key: 'disableEventListeners',
2385 value: function disableEventListeners$$1() {
2386 return disableEventListeners.call(this);
2387 }
2388
2389 /**
2390 * Schedule an update, it will run on the next UI update available
2391 * @method scheduleUpdate
2392 * @memberof Popper
2393 */
2394
2395
2396 /**
2397 * Collection of utilities useful when writing custom modifiers.
2398 * Starting from version 1.7, this method is available only if you
2399 * include `popper-utils.js` before `popper.js`.
2400 *
2401 * **DEPRECATION**: This way to access PopperUtils is deprecated
2402 * and will be removed in v2! Use the PopperUtils module directly instead.
2403 * Due to the high instability of the methods contained in Utils, we can't
2404 * guarantee them to follow semver. Use them at your own risk!
2405 * @static
2406 * @private
2407 * @type {Object}
2408 * @deprecated since version 1.8
2409 * @member Utils
2410 * @memberof Popper
2411 */
2412
2413 }]);
2414 return Popper;
2415}();
2416
2417/**
2418 * The `referenceObject` is an object that provides an interface compatible with Popper.js
2419 * and lets you use it as replacement of a real DOM node.<br />
2420 * You can use this method to position a popper relatively to a set of coordinates
2421 * in case you don't have a DOM node to use as reference.
2422 *
2423 * ```
2424 * new Popper(referenceObject, popperNode);
2425 * ```
2426 *
2427 * NB: This feature isn't supported in Internet Explorer 10
2428 * @name referenceObject
2429 * @property {Function} data.getBoundingClientRect
2430 * A function that returns a set of coordinates compatible with the native `getBoundingClientRect` method.
2431 * @property {number} data.clientWidth
2432 * An ES6 getter that will return the width of the virtual reference element.
2433 * @property {number} data.clientHeight
2434 * An ES6 getter that will return the height of the virtual reference element.
2435 */
2436
2437
2438Popper.Utils = (typeof window !== 'undefined' ? window : global).PopperUtils;
2439Popper.placements = placements;
2440Popper.Defaults = Defaults;
2441
2442return Popper;
2443
2444})));
2445//# sourceMappingURL=popper.js.map
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