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-rw-r--r--library/popper/popper.js2269
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diff --git a/library/popper/popper.js b/library/popper/popper.js
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+(function (global, factory) {
+ typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
+ typeof define === 'function' && define.amd ? define(factory) :
+ (global.Popper = factory());
+}(this, (function () { 'use strict';
+
+var nativeHints = ['native code', '[object MutationObserverConstructor]'];
+
+/**
+ * Determine if a function is implemented natively (as opposed to a polyfill).
+ * @method
+ * @memberof Popper.Utils
+ * @argument {Function | undefined} fn the function to check
+ * @returns {Boolean}
+ */
+var isNative = (function (fn) {
+ return nativeHints.some(function (hint) {
+ return (fn || '').toString().indexOf(hint) > -1;
+ });
+});
+
+var isBrowser = typeof window !== 'undefined';
+var longerTimeoutBrowsers = ['Edge', 'Trident', 'Firefox'];
+var timeoutDuration = 0;
+for (var i = 0; i < longerTimeoutBrowsers.length; i += 1) {
+ if (isBrowser && navigator.userAgent.indexOf(longerTimeoutBrowsers[i]) >= 0) {
+ timeoutDuration = 1;
+ break;
+ }
+}
+
+function microtaskDebounce(fn) {
+ var scheduled = false;
+ var i = 0;
+ var elem = document.createElement('span');
+
+ // MutationObserver provides a mechanism for scheduling microtasks, which
+ // are scheduled *before* the next task. This gives us a way to debounce
+ // a function but ensure it's called *before* the next paint.
+ var observer = new MutationObserver(function () {
+ fn();
+ scheduled = false;
+ });
+
+ observer.observe(elem, { attributes: true });
+
+ return function () {
+ if (!scheduled) {
+ scheduled = true;
+ elem.setAttribute('x-index', i);
+ i = i + 1; // don't use compund (+=) because it doesn't get optimized in V8
+ }
+ };
+}
+
+function taskDebounce(fn) {
+ var scheduled = false;
+ return function () {
+ if (!scheduled) {
+ scheduled = true;
+ setTimeout(function () {
+ scheduled = false;
+ fn();
+ }, timeoutDuration);
+ }
+ };
+}
+
+// It's common for MutationObserver polyfills to be seen in the wild, however
+// these rely on Mutation Events which only occur when an element is connected
+// to the DOM. The algorithm used in this module does not use a connected element,
+// and so we must ensure that a *native* MutationObserver is available.
+var supportsNativeMutationObserver = isBrowser && isNative(window.MutationObserver);
+
+/**
+* Create a debounced version of a method, that's asynchronously deferred
+* but called in the minimum time possible.
+*
+* @method
+* @memberof Popper.Utils
+* @argument {Function} fn
+* @returns {Function}
+*/
+var debounce = supportsNativeMutationObserver ? microtaskDebounce : taskDebounce;
+
+/**
+ * Tells if a given input is a number
+ * @method
+ * @memberof Popper.Utils
+ * @param {*} input to check
+ * @return {Boolean}
+ */
+function isNumeric(n) {
+ return n !== '' && !isNaN(parseFloat(n)) && isFinite(n);
+}
+
+/**
+ * Set the style to the given popper
+ * @method
+ * @memberof Popper.Utils
+ * @argument {Element} element - Element to apply the style to
+ * @argument {Object} styles
+ * Object with a list of properties and values which will be applied to the element
+ */
+function setStyles(element, styles) {
+ Object.keys(styles).forEach(function (prop) {
+ var unit = '';
+ // add unit if the value is numeric and is one of the following
+ if (['width', 'height', 'top', 'right', 'bottom', 'left'].indexOf(prop) !== -1 && isNumeric(styles[prop])) {
+ unit = 'px';
+ }
+ element.style[prop] = styles[prop] + unit;
+ });
+}
+
+/**
+ * Check if the given variable is a function
+ * @method
+ * @memberof Popper.Utils
+ * @argument {Any} functionToCheck - variable to check
+ * @returns {Boolean} answer to: is a function?
+ */
+function isFunction(functionToCheck) {
+ var getType = {};
+ return functionToCheck && getType.toString.call(functionToCheck) === '[object Function]';
+}
+
+/**
+ * Get CSS computed property of the given element
+ * @method
+ * @memberof Popper.Utils
+ * @argument {Eement} element
+ * @argument {String} property
+ */
+function getStyleComputedProperty(element, property) {
+ if (element.nodeType !== 1) {
+ return [];
+ }
+ // NOTE: 1 DOM access here
+ var css = window.getComputedStyle(element, null);
+ return property ? css[property] : css;
+}
+
+/**
+ * Returns the parentNode or the host of the element
+ * @method
+ * @memberof Popper.Utils
+ * @argument {Element} element
+ * @returns {Element} parent
+ */
+function getParentNode(element) {
+ if (element.nodeName === 'HTML') {
+ return element;
+ }
+ return element.parentNode || element.host;
+}
+
+/**
+ * Returns the scrolling parent of the given element
+ * @method
+ * @memberof Popper.Utils
+ * @argument {Element} element
+ * @returns {Element} scroll parent
+ */
+function getScrollParent(element) {
+ // Return body, `getScroll` will take care to get the correct `scrollTop` from it
+ if (!element || ['HTML', 'BODY', '#document'].indexOf(element.nodeName) !== -1) {
+ return window.document.body;
+ }
+
+ // Firefox want us to check `-x` and `-y` variations as well
+
+ var _getStyleComputedProp = getStyleComputedProperty(element),
+ overflow = _getStyleComputedProp.overflow,
+ overflowX = _getStyleComputedProp.overflowX,
+ overflowY = _getStyleComputedProp.overflowY;
+
+ if (/(auto|scroll)/.test(overflow + overflowY + overflowX)) {
+ return element;
+ }
+
+ return getScrollParent(getParentNode(element));
+}
+
+function isOffsetContainer(element) {
+ var nodeName = element.nodeName;
+
+ if (nodeName === 'BODY') {
+ return false;
+ }
+ return nodeName === 'HTML' || element.firstElementChild.offsetParent === element;
+}
+
+/**
+ * Finds the root node (document, shadowDOM root) of the given element
+ * @method
+ * @memberof Popper.Utils
+ * @argument {Element} node
+ * @returns {Element} root node
+ */
+function getRoot(node) {
+ if (node.parentNode !== null) {
+ return getRoot(node.parentNode);
+ }
+
+ return node;
+}
+
+/**
+ * Returns the offset parent of the given element
+ * @method
+ * @memberof Popper.Utils
+ * @argument {Element} element
+ * @returns {Element} offset parent
+ */
+function getOffsetParent(element) {
+ // NOTE: 1 DOM access here
+ var offsetParent = element && element.offsetParent;
+ var nodeName = offsetParent && offsetParent.nodeName;
+
+ if (!nodeName || nodeName === 'BODY' || nodeName === 'HTML') {
+ return window.document.documentElement;
+ }
+
+ return offsetParent;
+}
+
+/**
+ * Finds the offset parent common to the two provided nodes
+ * @method
+ * @memberof Popper.Utils
+ * @argument {Element} element1
+ * @argument {Element} element2
+ * @returns {Element} common offset parent
+ */
+function findCommonOffsetParent(element1, element2) {
+ // This check is needed to avoid errors in case one of the elements isn't defined for any reason
+ if (!element1 || !element1.nodeType || !element2 || !element2.nodeType) {
+ return window.document.documentElement;
+ }
+
+ // Here we make sure to give as "start" the element that comes first in the DOM
+ var order = element1.compareDocumentPosition(element2) & Node.DOCUMENT_POSITION_FOLLOWING;
+ var start = order ? element1 : element2;
+ var end = order ? element2 : element1;
+
+ // Get common ancestor container
+ var range = document.createRange();
+ range.setStart(start, 0);
+ range.setEnd(end, 0);
+ var commonAncestorContainer = range.commonAncestorContainer;
+
+ // Both nodes are inside #document
+
+ if (element1 !== commonAncestorContainer && element2 !== commonAncestorContainer || start.contains(end)) {
+ if (isOffsetContainer(commonAncestorContainer)) {
+ return commonAncestorContainer;
+ }
+
+ return getOffsetParent(commonAncestorContainer);
+ }
+
+ // one of the nodes is inside shadowDOM, find which one
+ var element1root = getRoot(element1);
+ if (element1root.host) {
+ return findCommonOffsetParent(element1root.host, element2);
+ } else {
+ return findCommonOffsetParent(element1, getRoot(element2).host);
+ }
+}
+
+/**
+ * Gets the scroll value of the given element in the given side (top and left)
+ * @method
+ * @memberof Popper.Utils
+ * @argument {Element} element
+ * @argument {String} side `top` or `left`
+ * @returns {number} amount of scrolled pixels
+ */
+function getScroll(element) {
+ var side = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 'top';
+
+ var upperSide = side === 'top' ? 'scrollTop' : 'scrollLeft';
+ var nodeName = element.nodeName;
+
+ if (nodeName === 'BODY' || nodeName === 'HTML') {
+ var html = window.document.documentElement;
+ var scrollingElement = window.document.scrollingElement || html;
+ return scrollingElement[upperSide];
+ }
+
+ return element[upperSide];
+}
+
+/*
+ * Sum or subtract the element scroll values (left and top) from a given rect object
+ * @method
+ * @memberof Popper.Utils
+ * @param {Object} rect - Rect object you want to change
+ * @param {HTMLElement} element - The element from the function reads the scroll values
+ * @param {Boolean} subtract - set to true if you want to subtract the scroll values
+ * @return {Object} rect - The modifier rect object
+ */
+function includeScroll(rect, element) {
+ var subtract = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : false;
+
+ var scrollTop = getScroll(element, 'top');
+ var scrollLeft = getScroll(element, 'left');
+ var modifier = subtract ? -1 : 1;
+ rect.top += scrollTop * modifier;
+ rect.bottom += scrollTop * modifier;
+ rect.left += scrollLeft * modifier;
+ rect.right += scrollLeft * modifier;
+ return rect;
+}
+
+/*
+ * Helper to detect borders of a given element
+ * @method
+ * @memberof Popper.Utils
+ * @param {CSSStyleDeclaration} styles
+ * Result of `getStyleComputedProperty` on the given element
+ * @param {String} axis - `x` or `y`
+ * @return {number} borders - The borders size of the given axis
+ */
+
+function getBordersSize(styles, axis) {
+ var sideA = axis === 'x' ? 'Left' : 'Top';
+ var sideB = sideA === 'Left' ? 'Right' : 'Bottom';
+
+ return +styles['border' + sideA + 'Width'].split('px')[0] + +styles['border' + sideB + 'Width'].split('px')[0];
+}
+
+/**
+ * Tells if you are running Internet Explorer 10
+ * @method
+ * @memberof Popper.Utils
+ * @returns {Boolean} isIE10
+ */
+var isIE10 = undefined;
+
+var isIE10$1 = function () {
+ if (isIE10 === undefined) {
+ isIE10 = navigator.appVersion.indexOf('MSIE 10') !== -1;
+ }
+ return isIE10;
+};
+
+function getSize(axis, body, html, computedStyle) {
+ return Math.max(body['offset' + axis], html['client' + axis], html['offset' + axis], isIE10$1() ? html['offset' + axis] + computedStyle['margin' + (axis === 'Height' ? 'Top' : 'Left')] + computedStyle['margin' + (axis === 'Height' ? 'Bottom' : 'Right')] : 0);
+}
+
+function getWindowSizes() {
+ var body = window.document.body;
+ var html = window.document.documentElement;
+ var computedStyle = isIE10$1() && window.getComputedStyle(html);
+
+ return {
+ height: getSize('Height', body, html, computedStyle),
+ width: getSize('Width', body, html, computedStyle)
+ };
+}
+
+var classCallCheck = function (instance, Constructor) {
+ if (!(instance instanceof Constructor)) {
+ throw new TypeError("Cannot call a class as a function");
+ }
+};
+
+var createClass = function () {
+ function defineProperties(target, props) {
+ for (var i = 0; i < props.length; i++) {
+ var descriptor = props[i];
+ descriptor.enumerable = descriptor.enumerable || false;
+ descriptor.configurable = true;
+ if ("value" in descriptor) descriptor.writable = true;
+ Object.defineProperty(target, descriptor.key, descriptor);
+ }
+ }
+
+ return function (Constructor, protoProps, staticProps) {
+ if (protoProps) defineProperties(Constructor.prototype, protoProps);
+ if (staticProps) defineProperties(Constructor, staticProps);
+ return Constructor;
+ };
+}();
+
+
+
+
+
+var defineProperty = function (obj, key, value) {
+ if (key in obj) {
+ Object.defineProperty(obj, key, {
+ value: value,
+ enumerable: true,
+ configurable: true,
+ writable: true
+ });
+ } else {
+ obj[key] = value;
+ }
+
+ return obj;
+};
+
+var _extends = Object.assign || function (target) {
+ for (var i = 1; i < arguments.length; i++) {
+ var source = arguments[i];
+
+ for (var key in source) {
+ if (Object.prototype.hasOwnProperty.call(source, key)) {
+ target[key] = source[key];
+ }
+ }
+ }
+
+ return target;
+};
+
+/**
+ * Given element offsets, generate an output similar to getBoundingClientRect
+ * @method
+ * @memberof Popper.Utils
+ * @argument {Object} offsets
+ * @returns {Object} ClientRect like output
+ */
+function getClientRect(offsets) {
+ return _extends({}, offsets, {
+ right: offsets.left + offsets.width,
+ bottom: offsets.top + offsets.height
+ });
+}
+
+/**
+ * Get bounding client rect of given element
+ * @method
+ * @memberof Popper.Utils
+ * @param {HTMLElement} element
+ * @return {Object} client rect
+ */
+function getBoundingClientRect(element) {
+ var rect = {};
+
+ // IE10 10 FIX: Please, don't ask, the element isn't
+ // considered in DOM in some circumstances...
+ // This isn't reproducible in IE10 compatibility mode of IE11
+ if (isIE10$1()) {
+ try {
+ rect = element.getBoundingClientRect();
+ var scrollTop = getScroll(element, 'top');
+ var scrollLeft = getScroll(element, 'left');
+ rect.top += scrollTop;
+ rect.left += scrollLeft;
+ rect.bottom += scrollTop;
+ rect.right += scrollLeft;
+ } catch (err) {}
+ } else {
+ rect = element.getBoundingClientRect();
+ }
+
+ var result = {
+ left: rect.left,
+ top: rect.top,
+ width: rect.right - rect.left,
+ height: rect.bottom - rect.top
+ };
+
+ // subtract scrollbar size from sizes
+ var sizes = element.nodeName === 'HTML' ? getWindowSizes() : {};
+ var width = sizes.width || element.clientWidth || result.right - result.left;
+ var height = sizes.height || element.clientHeight || result.bottom - result.top;
+
+ var horizScrollbar = element.offsetWidth - width;
+ var vertScrollbar = element.offsetHeight - height;
+
+ // if an hypothetical scrollbar is detected, we must be sure it's not a `border`
+ // we make this check conditional for performance reasons
+ if (horizScrollbar || vertScrollbar) {
+ var styles = getStyleComputedProperty(element);
+ horizScrollbar -= getBordersSize(styles, 'x');
+ vertScrollbar -= getBordersSize(styles, 'y');
+
+ result.width -= horizScrollbar;
+ result.height -= vertScrollbar;
+ }
+
+ return getClientRect(result);
+}
+
+function getOffsetRectRelativeToArbitraryNode(children, parent) {
+ var isIE10 = isIE10$1();
+ var isHTML = parent.nodeName === 'HTML';
+ var childrenRect = getBoundingClientRect(children);
+ var parentRect = getBoundingClientRect(parent);
+ var scrollParent = getScrollParent(children);
+ var offsets = getClientRect({
+ top: childrenRect.top - parentRect.top,
+ left: childrenRect.left - parentRect.left,
+ width: childrenRect.width,
+ height: childrenRect.height
+ });
+
+ // Subtract margins of documentElement in case it's being used as parent
+ // we do this only on HTML because it's the only element that behaves
+ // differently when margins are applied to it. The margins are included in
+ // the box of the documentElement, in the other cases not.
+ if (isHTML || parent.nodeName === 'BODY') {
+ var styles = getStyleComputedProperty(parent);
+ var borderTopWidth = isIE10 && isHTML ? 0 : +styles.borderTopWidth.split('px')[0];
+ var borderLeftWidth = isIE10 && isHTML ? 0 : +styles.borderLeftWidth.split('px')[0];
+ var marginTop = isIE10 && isHTML ? 0 : +styles.marginTop.split('px')[0];
+ var marginLeft = isIE10 && isHTML ? 0 : +styles.marginLeft.split('px')[0];
+
+ offsets.top -= borderTopWidth - marginTop;
+ offsets.bottom -= borderTopWidth - marginTop;
+ offsets.left -= borderLeftWidth - marginLeft;
+ offsets.right -= borderLeftWidth - marginLeft;
+
+ // Attach marginTop and marginLeft because in some circumstances we may need them
+ offsets.marginTop = marginTop;
+ offsets.marginLeft = marginLeft;
+ }
+
+ if (isIE10 ? parent.contains(scrollParent) : parent === scrollParent && scrollParent.nodeName !== 'BODY') {
+ offsets = includeScroll(offsets, parent);
+ }
+
+ return offsets;
+}
+
+function getViewportOffsetRectRelativeToArtbitraryNode(element) {
+ var html = window.document.documentElement;
+ var relativeOffset = getOffsetRectRelativeToArbitraryNode(element, html);
+ var width = Math.max(html.clientWidth, window.innerWidth || 0);
+ var height = Math.max(html.clientHeight, window.innerHeight || 0);
+
+ var scrollTop = getScroll(html);
+ var scrollLeft = getScroll(html, 'left');
+
+ var offset = {
+ top: scrollTop - relativeOffset.top + relativeOffset.marginTop,
+ left: scrollLeft - relativeOffset.left + relativeOffset.marginLeft,
+ width: width,
+ height: height
+ };
+
+ return getClientRect(offset);
+}
+
+/**
+ * Check if the given element is fixed or is inside a fixed parent
+ * @method
+ * @memberof Popper.Utils
+ * @argument {Element} element
+ * @argument {Element} customContainer
+ * @returns {Boolean} answer to "isFixed?"
+ */
+function isFixed(element) {
+ var nodeName = element.nodeName;
+ if (nodeName === 'BODY' || nodeName === 'HTML') {
+ return false;
+ }
+ if (getStyleComputedProperty(element, 'position') === 'fixed') {
+ return true;
+ }
+ return isFixed(getParentNode(element));
+}
+
+/**
+ * Computed the boundaries limits and return them
+ * @method
+ * @memberof Popper.Utils
+ * @param {HTMLElement} popper
+ * @param {HTMLElement} reference
+ * @param {number} padding
+ * @param {HTMLElement} boundariesElement - Element used to define the boundaries
+ * @returns {Object} Coordinates of the boundaries
+ */
+function getBoundaries(popper, reference, padding, boundariesElement) {
+ // NOTE: 1 DOM access here
+ var boundaries = { top: 0, left: 0 };
+ var offsetParent = findCommonOffsetParent(popper, reference);
+
+ // Handle viewport case
+ if (boundariesElement === 'viewport') {
+ boundaries = getViewportOffsetRectRelativeToArtbitraryNode(offsetParent);
+ } else {
+ // Handle other cases based on DOM element used as boundaries
+ var boundariesNode = void 0;
+ if (boundariesElement === 'scrollParent') {
+ boundariesNode = getScrollParent(getParentNode(popper));
+ if (boundariesNode.nodeName === 'BODY') {
+ boundariesNode = window.document.documentElement;
+ }
+ } else if (boundariesElement === 'window') {
+ boundariesNode = window.document.documentElement;
+ } else {
+ boundariesNode = boundariesElement;
+ }
+
+ var offsets = getOffsetRectRelativeToArbitraryNode(boundariesNode, offsetParent);
+
+ // In case of HTML, we need a different computation
+ if (boundariesNode.nodeName === 'HTML' && !isFixed(offsetParent)) {
+ var _getWindowSizes = getWindowSizes(),
+ height = _getWindowSizes.height,
+ width = _getWindowSizes.width;
+
+ boundaries.top += offsets.top - offsets.marginTop;
+ boundaries.bottom = height + offsets.top;
+ boundaries.left += offsets.left - offsets.marginLeft;
+ boundaries.right = width + offsets.left;
+ } else {
+ // for all the other DOM elements, this one is good
+ boundaries = offsets;
+ }
+ }
+
+ // Add paddings
+ boundaries.left += padding;
+ boundaries.top += padding;
+ boundaries.right -= padding;
+ boundaries.bottom -= padding;
+
+ return boundaries;
+}
+
+function getArea(_ref) {
+ var width = _ref.width,
+ height = _ref.height;
+
+ return width * height;
+}
+
+/**
+ * Utility used to transform the `auto` placement to the placement with more
+ * available space.
+ * @method
+ * @memberof Popper.Utils
+ * @argument {Object} data - The data object generated by update method
+ * @argument {Object} options - Modifiers configuration and options
+ * @returns {Object} The data object, properly modified
+ */
+function computeAutoPlacement(placement, refRect, popper, reference, boundariesElement) {
+ var padding = arguments.length > 5 && arguments[5] !== undefined ? arguments[5] : 0;
+
+ if (placement.indexOf('auto') === -1) {
+ return placement;
+ }
+
+ var boundaries = getBoundaries(popper, reference, padding, boundariesElement);
+
+ var rects = {
+ top: {
+ width: boundaries.width,
+ height: refRect.top - boundaries.top
+ },
+ right: {
+ width: boundaries.right - refRect.right,
+ height: boundaries.height
+ },
+ bottom: {
+ width: boundaries.width,
+ height: boundaries.bottom - refRect.bottom
+ },
+ left: {
+ width: refRect.left - boundaries.left,
+ height: boundaries.height
+ }
+ };
+
+ var sortedAreas = Object.keys(rects).map(function (key) {
+ return _extends({
+ key: key
+ }, rects[key], {
+ area: getArea(rects[key])
+ });
+ }).sort(function (a, b) {
+ return b.area - a.area;
+ });
+
+ var filteredAreas = sortedAreas.filter(function (_ref2) {
+ var width = _ref2.width,
+ height = _ref2.height;
+ return width >= popper.clientWidth && height >= popper.clientHeight;
+ });
+
+ var computedPlacement = filteredAreas.length > 0 ? filteredAreas[0].key : sortedAreas[0].key;
+
+ var variation = placement.split('-')[1];
+
+ return computedPlacement + (variation ? '-' + variation : '');
+}
+
+/**
+ * Get offsets to the reference element
+ * @method
+ * @memberof Popper.Utils
+ * @param {Object} state
+ * @param {Element} popper - the popper element
+ * @param {Element} reference - the reference element (the popper will be relative to this)
+ * @returns {Object} An object containing the offsets which will be applied to the popper
+ */
+function getReferenceOffsets(state, popper, reference) {
+ var commonOffsetParent = findCommonOffsetParent(popper, reference);
+ return getOffsetRectRelativeToArbitraryNode(reference, commonOffsetParent);
+}
+
+/**
+ * Get the outer sizes of the given element (offset size + margins)
+ * @method
+ * @memberof Popper.Utils
+ * @argument {Element} element
+ * @returns {Object} object containing width and height properties
+ */
+function getOuterSizes(element) {
+ var styles = window.getComputedStyle(element);
+ var x = parseFloat(styles.marginTop) + parseFloat(styles.marginBottom);
+ var y = parseFloat(styles.marginLeft) + parseFloat(styles.marginRight);
+ var result = {
+ width: element.offsetWidth + y,
+ height: element.offsetHeight + x
+ };
+ return result;
+}
+
+/**
+ * Get the opposite placement of the given one
+ * @method
+ * @memberof Popper.Utils
+ * @argument {String} placement
+ * @returns {String} flipped placement
+ */
+function getOppositePlacement(placement) {
+ var hash = { left: 'right', right: 'left', bottom: 'top', top: 'bottom' };
+ return placement.replace(/left|right|bottom|top/g, function (matched) {
+ return hash[matched];
+ });
+}
+
+/**
+ * Get offsets to the popper
+ * @method
+ * @memberof Popper.Utils
+ * @param {Object} position - CSS position the Popper will get applied
+ * @param {HTMLElement} popper - the popper element
+ * @param {Object} referenceOffsets - the reference offsets (the popper will be relative to this)
+ * @param {String} placement - one of the valid placement options
+ * @returns {Object} popperOffsets - An object containing the offsets which will be applied to the popper
+ */
+function getPopperOffsets(popper, referenceOffsets, placement) {
+ placement = placement.split('-')[0];
+
+ // Get popper node sizes
+ var popperRect = getOuterSizes(popper);
+
+ // Add position, width and height to our offsets object
+ var popperOffsets = {
+ width: popperRect.width,
+ height: popperRect.height
+ };
+
+ // depending by the popper placement we have to compute its offsets slightly differently
+ var isHoriz = ['right', 'left'].indexOf(placement) !== -1;
+ var mainSide = isHoriz ? 'top' : 'left';
+ var secondarySide = isHoriz ? 'left' : 'top';
+ var measurement = isHoriz ? 'height' : 'width';
+ var secondaryMeasurement = !isHoriz ? 'height' : 'width';
+
+ popperOffsets[mainSide] = referenceOffsets[mainSide] + referenceOffsets[measurement] / 2 - popperRect[measurement] / 2;
+ if (placement === secondarySide) {
+ popperOffsets[secondarySide] = referenceOffsets[secondarySide] - popperRect[secondaryMeasurement];
+ } else {
+ popperOffsets[secondarySide] = referenceOffsets[getOppositePlacement(secondarySide)];
+ }
+
+ return popperOffsets;
+}
+
+/**
+ * Mimics the `find` method of Array
+ * @method
+ * @memberof Popper.Utils
+ * @argument {Array} arr
+ * @argument prop
+ * @argument value
+ * @returns index or -1
+ */
+function find(arr, check) {
+ // use native find if supported
+ if (Array.prototype.find) {
+ return arr.find(check);
+ }
+
+ // use `filter` to obtain the same behavior of `find`
+ return arr.filter(check)[0];
+}
+
+/**
+ * Return the index of the matching object
+ * @method
+ * @memberof Popper.Utils
+ * @argument {Array} arr
+ * @argument prop
+ * @argument value
+ * @returns index or -1
+ */
+function findIndex(arr, prop, value) {
+ // use native findIndex if supported
+ if (Array.prototype.findIndex) {
+ return arr.findIndex(function (cur) {
+ return cur[prop] === value;
+ });
+ }
+
+ // use `find` + `indexOf` if `findIndex` isn't supported
+ var match = find(arr, function (obj) {
+ return obj[prop] === value;
+ });
+ return arr.indexOf(match);
+}
+
+/**
+ * Loop trough the list of modifiers and run them in order,
+ * each of them will then edit the data object.
+ * @method
+ * @memberof Popper.Utils
+ * @param {dataObject} data
+ * @param {Array} modifiers
+ * @param {String} ends - Optional modifier name used as stopper
+ * @returns {dataObject}
+ */
+function runModifiers(modifiers, data, ends) {
+ var modifiersToRun = ends === undefined ? modifiers : modifiers.slice(0, findIndex(modifiers, 'name', ends));
+
+ modifiersToRun.forEach(function (modifier) {
+ if (modifier.function) {
+ console.warn('`modifier.function` is deprecated, use `modifier.fn`!');
+ }
+ var fn = modifier.function || modifier.fn;
+ if (modifier.enabled && isFunction(fn)) {
+ data = fn(data, modifier);
+ }
+ });
+
+ return data;
+}
+
+/**
+ * Updates the position of the popper, computing the new offsets and applying
+ * the new style.<br />
+ * Prefer `scheduleUpdate` over `update` because of performance reasons.
+ * @method
+ * @memberof Popper
+ */
+function update() {
+ // if popper is destroyed, don't perform any further update
+ if (this.state.isDestroyed) {
+ return;
+ }
+
+ var data = {
+ instance: this,
+ styles: {},
+ attributes: {},
+ flipped: false,
+ offsets: {}
+ };
+
+ // compute reference element offsets
+ data.offsets.reference = getReferenceOffsets(this.state, this.popper, this.reference);
+
+ // compute auto placement, store placement inside the data object,
+ // modifiers will be able to edit `placement` if needed
+ // and refer to originalPlacement to know the original value
+ data.placement = computeAutoPlacement(this.options.placement, data.offsets.reference, this.popper, this.reference, this.options.modifiers.flip.boundariesElement, this.options.modifiers.flip.padding);
+
+ // store the computed placement inside `originalPlacement`
+ data.originalPlacement = data.placement;
+
+ // compute the popper offsets
+ data.offsets.popper = getPopperOffsets(this.popper, data.offsets.reference, data.placement);
+ data.offsets.popper.position = 'absolute';
+
+ // run the modifiers
+ data = runModifiers(this.modifiers, data);
+
+ // the first `update` will call `onCreate` callback
+ // the other ones will call `onUpdate` callback
+ if (!this.state.isCreated) {
+ this.state.isCreated = true;
+ this.options.onCreate(data);
+ } else {
+ this.options.onUpdate(data);
+ }
+}
+
+/**
+ * Helper used to know if the given modifier is enabled.
+ * @method
+ * @memberof Popper.Utils
+ * @returns {Boolean}
+ */
+function isModifierEnabled(modifiers, modifierName) {
+ return modifiers.some(function (_ref) {
+ var name = _ref.name,
+ enabled = _ref.enabled;
+ return enabled && name === modifierName;
+ });
+}
+
+/**
+ * Get the prefixed supported property name
+ * @method
+ * @memberof Popper.Utils
+ * @argument {String} property (camelCase)
+ * @returns {String} prefixed property (camelCase)
+ */
+function getSupportedPropertyName(property) {
+ var prefixes = [false, 'ms', 'webkit', 'moz', 'o'];
+ var upperProp = property.charAt(0).toUpperCase() + property.slice(1);
+
+ for (var i = 0; i < prefixes.length - 1; i++) {
+ var prefix = prefixes[i];
+ var toCheck = prefix ? '' + prefix + upperProp : property;
+ if (typeof window.document.body.style[toCheck] !== 'undefined') {
+ return toCheck;
+ }
+ }
+ return null;
+}
+
+/**
+ * Destroy the popper
+ * @method
+ * @memberof Popper
+ */
+function destroy() {
+ this.state.isDestroyed = true;
+
+ // touch DOM only if `applyStyle` modifier is enabled
+ if (isModifierEnabled(this.modifiers, 'applyStyle')) {
+ this.popper.removeAttribute('x-placement');
+ this.popper.style.left = '';
+ this.popper.style.position = '';
+ this.popper.style.top = '';
+ this.popper.style[getSupportedPropertyName('transform')] = '';
+ }
+
+ this.disableEventListeners();
+
+ // remove the popper if user explicity asked for the deletion on destroy
+ // do not use `remove` because IE11 doesn't support it
+ if (this.options.removeOnDestroy) {
+ this.popper.parentNode.removeChild(this.popper);
+ }
+ return this;
+}
+
+function attachToScrollParents(scrollParent, event, callback, scrollParents) {
+ var isBody = scrollParent.nodeName === 'BODY';
+ var target = isBody ? window : scrollParent;
+ target.addEventListener(event, callback, { passive: true });
+
+ if (!isBody) {
+ attachToScrollParents(getScrollParent(target.parentNode), event, callback, scrollParents);
+ }
+ scrollParents.push(target);
+}
+
+/**
+ * Setup needed event listeners used to update the popper position
+ * @method
+ * @memberof Popper.Utils
+ * @private
+ */
+function setupEventListeners(reference, options, state, updateBound) {
+ // Resize event listener on window
+ state.updateBound = updateBound;
+ window.addEventListener('resize', state.updateBound, { passive: true });
+
+ // Scroll event listener on scroll parents
+ var scrollElement = getScrollParent(reference);
+ attachToScrollParents(scrollElement, 'scroll', state.updateBound, state.scrollParents);
+ state.scrollElement = scrollElement;
+ state.eventsEnabled = true;
+
+ return state;
+}
+
+/**
+ * It will add resize/scroll events and start recalculating
+ * position of the popper element when they are triggered.
+ * @method
+ * @memberof Popper
+ */
+function enableEventListeners() {
+ if (!this.state.eventsEnabled) {
+ this.state = setupEventListeners(this.reference, this.options, this.state, this.scheduleUpdate);
+ }
+}
+
+/**
+ * Remove event listeners used to update the popper position
+ * @method
+ * @memberof Popper.Utils
+ * @private
+ */
+function removeEventListeners(reference, state) {
+ // Remove resize event listener on window
+ window.removeEventListener('resize', state.updateBound);
+
+ // Remove scroll event listener on scroll parents
+ state.scrollParents.forEach(function (target) {
+ target.removeEventListener('scroll', state.updateBound);
+ });
+
+ // Reset state
+ state.updateBound = null;
+ state.scrollParents = [];
+ state.scrollElement = null;
+ state.eventsEnabled = false;
+ return state;
+}
+
+/**
+ * It will remove resize/scroll events and won't recalculate popper position
+ * when they are triggered. It also won't trigger onUpdate callback anymore,
+ * unless you call `update` method manually.
+ * @method
+ * @memberof Popper
+ */
+function disableEventListeners() {
+ if (this.state.eventsEnabled) {
+ window.cancelAnimationFrame(this.scheduleUpdate);
+ this.state = removeEventListeners(this.reference, this.state);
+ }
+}
+
+/**
+ * Set the attributes to the given popper
+ * @method
+ * @memberof Popper.Utils
+ * @argument {Element} element - Element to apply the attributes to
+ * @argument {Object} styles
+ * Object with a list of properties and values which will be applied to the element
+ */
+function setAttributes(element, attributes) {
+ Object.keys(attributes).forEach(function (prop) {
+ var value = attributes[prop];
+ if (value !== false) {
+ element.setAttribute(prop, attributes[prop]);
+ } else {
+ element.removeAttribute(prop);
+ }
+ });
+}
+
+/**
+ * @function
+ * @memberof Modifiers
+ * @argument {Object} data - The data object generated by `update` method
+ * @argument {Object} data.styles - List of style properties - values to apply to popper element
+ * @argument {Object} data.attributes - List of attribute properties - values to apply to popper element
+ * @argument {Object} options - Modifiers configuration and options
+ * @returns {Object} The same data object
+ */
+function applyStyle(data, options) {
+ // apply the final offsets to the popper
+ // NOTE: 1 DOM access here
+ var styles = {
+ position: data.offsets.popper.position
+ };
+
+ var attributes = {
+ 'x-placement': data.placement
+ };
+
+ // round top and left to avoid blurry text
+ var left = Math.round(data.offsets.popper.left);
+ var top = Math.round(data.offsets.popper.top);
+
+ // if gpuAcceleration is set to true and transform is supported,
+ // we use `translate3d` to apply the position to the popper we
+ // automatically use the supported prefixed version if needed
+ var prefixedProperty = getSupportedPropertyName('transform');
+ if (options.gpuAcceleration && prefixedProperty) {
+ styles[prefixedProperty] = 'translate3d(' + left + 'px, ' + top + 'px, 0)';
+ styles.top = 0;
+ styles.left = 0;
+ styles.willChange = 'transform';
+ } else {
+ // othwerise, we use the standard `left` and `top` properties
+ styles.left = left;
+ styles.top = top;
+ styles.willChange = 'top, left';
+ }
+
+ // any property present in `data.styles` will be applied to the popper,
+ // in this way we can make the 3rd party modifiers add custom styles to it
+ // Be aware, modifiers could override the properties defined in the previous
+ // lines of this modifier!
+ setStyles(data.instance.popper, _extends({}, styles, data.styles));
+
+ // any property present in `data.attributes` will be applied to the popper,
+ // they will be set as HTML attributes of the element
+ setAttributes(data.instance.popper, _extends({}, attributes, data.attributes));
+
+ // if the arrow style has been computed, apply the arrow style
+ if (data.offsets.arrow) {
+ setStyles(data.arrowElement, data.offsets.arrow);
+ }
+
+ return data;
+}
+
+/**
+ * Set the x-placement attribute before everything else because it could be used
+ * to add margins to the popper margins needs to be calculated to get the
+ * correct popper offsets.
+ * @method
+ * @memberof Popper.modifiers
+ * @param {HTMLElement} reference - The reference element used to position the popper
+ * @param {HTMLElement} popper - The HTML element used as popper.
+ * @param {Object} options - Popper.js options
+ */
+function applyStyleOnLoad(reference, popper, options, modifierOptions, state) {
+ // compute reference element offsets
+ var referenceOffsets = getReferenceOffsets(state, popper, reference);
+
+ // compute auto placement, store placement inside the data object,
+ // modifiers will be able to edit `placement` if needed
+ // and refer to originalPlacement to know the original value
+ var placement = computeAutoPlacement(options.placement, referenceOffsets, popper, reference, options.modifiers.flip.boundariesElement, options.modifiers.flip.padding);
+
+ popper.setAttribute('x-placement', placement);
+ return options;
+}
+
+/**
+ * Helper used to know if the given modifier depends from another one.<br />
+ * It checks if the needed modifier is listed and enabled.
+ * @method
+ * @memberof Popper.Utils
+ * @param {Array} modifiers - list of modifiers
+ * @param {String} requestingName - name of requesting modifier
+ * @param {String} requestedName - name of requested modifier
+ * @returns {Boolean}
+ */
+function isModifierRequired(modifiers, requestingName, requestedName) {
+ var requesting = find(modifiers, function (_ref) {
+ var name = _ref.name;
+ return name === requestingName;
+ });
+
+ var isRequired = !!requesting && modifiers.some(function (modifier) {
+ return modifier.name === requestedName && modifier.enabled && modifier.order < requesting.order;
+ });
+
+ if (!isRequired) {
+ var _requesting = '`' + requestingName + '`';
+ var requested = '`' + requestedName + '`';
+ console.warn(requested + ' modifier is required by ' + _requesting + ' modifier in order to work, be sure to include it before ' + _requesting + '!');
+ }
+ return isRequired;
+}
+
+/**
+ * @function
+ * @memberof Modifiers
+ * @argument {Object} data - The data object generated by update method
+ * @argument {Object} options - Modifiers configuration and options
+ * @returns {Object} The data object, properly modified
+ */
+function arrow(data, options) {
+ // arrow depends on keepTogether in order to work
+ if (!isModifierRequired(data.instance.modifiers, 'arrow', 'keepTogether')) {
+ return data;
+ }
+
+ var arrowElement = options.element;
+
+ // if arrowElement is a string, suppose it's a CSS selector
+ if (typeof arrowElement === 'string') {
+ arrowElement = data.instance.popper.querySelector(arrowElement);
+
+ // if arrowElement is not found, don't run the modifier
+ if (!arrowElement) {
+ return data;
+ }
+ } else {
+ // if the arrowElement isn't a query selector we must check that the
+ // provided DOM node is child of its popper node
+ if (!data.instance.popper.contains(arrowElement)) {
+ console.warn('WARNING: `arrow.element` must be child of its popper element!');
+ return data;
+ }
+ }
+
+ var placement = data.placement.split('-')[0];
+ var popper = getClientRect(data.offsets.popper);
+ var reference = data.offsets.reference;
+ var isVertical = ['left', 'right'].indexOf(placement) !== -1;
+
+ var len = isVertical ? 'height' : 'width';
+ var side = isVertical ? 'top' : 'left';
+ var altSide = isVertical ? 'left' : 'top';
+ var opSide = isVertical ? 'bottom' : 'right';
+ var arrowElementSize = getOuterSizes(arrowElement)[len];
+
+ //
+ // extends keepTogether behavior making sure the popper and its reference have enough pixels in conjuction
+ //
+
+ // top/left side
+ if (reference[opSide] - arrowElementSize < popper[side]) {
+ data.offsets.popper[side] -= popper[side] - (reference[opSide] - arrowElementSize);
+ }
+ // bottom/right side
+ if (reference[side] + arrowElementSize > popper[opSide]) {
+ data.offsets.popper[side] += reference[side] + arrowElementSize - popper[opSide];
+ }
+
+ // compute center of the popper
+ var center = reference[side] + reference[len] / 2 - arrowElementSize / 2;
+
+ // Compute the sideValue using the updated popper offsets
+ var sideValue = center - getClientRect(data.offsets.popper)[side];
+
+ // prevent arrowElement from being placed not contiguously to its popper
+ sideValue = Math.max(Math.min(popper[len] - arrowElementSize, sideValue), 0);
+
+ data.arrowElement = arrowElement;
+ data.offsets.arrow = {};
+ data.offsets.arrow[side] = Math.floor(sideValue);
+ data.offsets.arrow[altSide] = ''; // make sure to unset any eventual altSide value from the DOM node
+
+ return data;
+}
+
+/**
+ * Get the opposite placement variation of the given one
+ * @method
+ * @memberof Popper.Utils
+ * @argument {String} placement variation
+ * @returns {String} flipped placement variation
+ */
+function getOppositeVariation(variation) {
+ if (variation === 'end') {
+ return 'start';
+ } else if (variation === 'start') {
+ return 'end';
+ }
+ return variation;
+}
+
+/**
+ * List of accepted placements to use as values of the `placement` option.<br />
+ * Valid placements are:
+ * - `auto`
+ * - `top`
+ * - `right`
+ * - `bottom`
+ * - `left`
+ *
+ * Each placement can have a variation from this list:
+ * - `-start`
+ * - `-end`
+ *
+ * Variations are interpreted easily if you think of them as the left to right
+ * written languages. Horizontally (`top` and `bottom`), `start` is left and `end`
+ * is right.<br />
+ * Vertically (`left` and `right`), `start` is top and `end` is bottom.
+ *
+ * Some valid examples are:
+ * - `top-end` (on top of reference, right aligned)
+ * - `right-start` (on right of reference, top aligned)
+ * - `bottom` (on bottom, centered)
+ * - `auto-right` (on the side with more space available, alignment depends by placement)
+ *
+ * @static
+ * @type {Array}
+ * @enum {String}
+ * @readonly
+ * @method placements
+ * @memberof Popper
+ */
+var 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'];
+
+// Get rid of `auto` `auto-start` and `auto-end`
+var validPlacements = placements.slice(3);
+
+/**
+ * Given an initial placement, returns all the subsequent placements
+ * clockwise (or counter-clockwise).
+ *
+ * @method
+ * @memberof Popper.Utils
+ * @argument {String} placement - A valid placement (it accepts variations)
+ * @argument {Boolean} counter - Set to true to walk the placements counterclockwise
+ * @returns {Array} placements including their variations
+ */
+function clockwise(placement) {
+ var counter = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;
+
+ var index = validPlacements.indexOf(placement);
+ var arr = validPlacements.slice(index + 1).concat(validPlacements.slice(0, index));
+ return counter ? arr.reverse() : arr;
+}
+
+var BEHAVIORS = {
+ FLIP: 'flip',
+ CLOCKWISE: 'clockwise',
+ COUNTERCLOCKWISE: 'counterclockwise'
+};
+
+/**
+ * @function
+ * @memberof Modifiers
+ * @argument {Object} data - The data object generated by update method
+ * @argument {Object} options - Modifiers configuration and options
+ * @returns {Object} The data object, properly modified
+ */
+function flip(data, options) {
+ // if `inner` modifier is enabled, we can't use the `flip` modifier
+ if (isModifierEnabled(data.instance.modifiers, 'inner')) {
+ return data;
+ }
+
+ if (data.flipped && data.placement === data.originalPlacement) {
+ // seems like flip is trying to loop, probably there's not enough space on any of the flippable sides
+ return data;
+ }
+
+ var boundaries = getBoundaries(data.instance.popper, data.instance.reference, options.padding, options.boundariesElement);
+
+ var placement = data.placement.split('-')[0];
+ var placementOpposite = getOppositePlacement(placement);
+ var variation = data.placement.split('-')[1] || '';
+
+ var flipOrder = [];
+
+ switch (options.behavior) {
+ case BEHAVIORS.FLIP:
+ flipOrder = [placement, placementOpposite];
+ break;
+ case BEHAVIORS.CLOCKWISE:
+ flipOrder = clockwise(placement);
+ break;
+ case BEHAVIORS.COUNTERCLOCKWISE:
+ flipOrder = clockwise(placement, true);
+ break;
+ default:
+ flipOrder = options.behavior;
+ }
+
+ flipOrder.forEach(function (step, index) {
+ if (placement !== step || flipOrder.length === index + 1) {
+ return data;
+ }
+
+ placement = data.placement.split('-')[0];
+ placementOpposite = getOppositePlacement(placement);
+
+ var popperOffsets = getClientRect(data.offsets.popper);
+ var refOffsets = data.offsets.reference;
+
+ // using floor because the reference offsets may contain decimals we are not going to consider here
+ var floor = Math.floor;
+ 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);
+
+ var overflowsLeft = floor(popperOffsets.left) < floor(boundaries.left);
+ var overflowsRight = floor(popperOffsets.right) > floor(boundaries.right);
+ var overflowsTop = floor(popperOffsets.top) < floor(boundaries.top);
+ var overflowsBottom = floor(popperOffsets.bottom) > floor(boundaries.bottom);
+
+ var overflowsBoundaries = placement === 'left' && overflowsLeft || placement === 'right' && overflowsRight || placement === 'top' && overflowsTop || placement === 'bottom' && overflowsBottom;
+
+ // flip the variation if required
+ var isVertical = ['top', 'bottom'].indexOf(placement) !== -1;
+ var flippedVariation = !!options.flipVariations && (isVertical && variation === 'start' && overflowsLeft || isVertical && variation === 'end' && overflowsRight || !isVertical && variation === 'start' && overflowsTop || !isVertical && variation === 'end' && overflowsBottom);
+
+ if (overlapsRef || overflowsBoundaries || flippedVariation) {
+ // this boolean to detect any flip loop
+ data.flipped = true;
+
+ if (overlapsRef || overflowsBoundaries) {
+ placement = flipOrder[index + 1];
+ }
+
+ if (flippedVariation) {
+ variation = getOppositeVariation(variation);
+ }
+
+ data.placement = placement + (variation ? '-' + variation : '');
+
+ // this object contains `position`, we want to preserve it along with
+ // any additional property we may add in the future
+ data.offsets.popper = _extends({}, data.offsets.popper, getPopperOffsets(data.instance.popper, data.offsets.reference, data.placement));
+
+ data = runModifiers(data.instance.modifiers, data, 'flip');
+ }
+ });
+ return data;
+}
+
+/**
+ * @function
+ * @memberof Modifiers
+ * @argument {Object} data - The data object generated by update method
+ * @argument {Object} options - Modifiers configuration and options
+ * @returns {Object} The data object, properly modified
+ */
+function keepTogether(data) {
+ var popper = getClientRect(data.offsets.popper);
+ var reference = data.offsets.reference;
+ var placement = data.placement.split('-')[0];
+ var floor = Math.floor;
+ var isVertical = ['top', 'bottom'].indexOf(placement) !== -1;
+ var side = isVertical ? 'right' : 'bottom';
+ var opSide = isVertical ? 'left' : 'top';
+ var measurement = isVertical ? 'width' : 'height';
+
+ if (popper[side] < floor(reference[opSide])) {
+ data.offsets.popper[opSide] = floor(reference[opSide]) - popper[measurement];
+ }
+ if (popper[opSide] > floor(reference[side])) {
+ data.offsets.popper[opSide] = floor(reference[side]);
+ }
+
+ return data;
+}
+
+/**
+ * Converts a string containing value + unit into a px value number
+ * @function
+ * @memberof {modifiers~offset}
+ * @private
+ * @argument {String} str - Value + unit string
+ * @argument {String} measurement - `height` or `width`
+ * @argument {Object} popperOffsets
+ * @argument {Object} referenceOffsets
+ * @returns {Number|String}
+ * Value in pixels, or original string if no values were extracted
+ */
+function toValue(str, measurement, popperOffsets, referenceOffsets) {
+ // separate value from unit
+ var split = str.match(/((?:\-|\+)?\d*\.?\d*)(.*)/);
+ var value = +split[1];
+ var unit = split[2];
+
+ // If it's not a number it's an operator, I guess
+ if (!value) {
+ return str;
+ }
+
+ if (unit.indexOf('%') === 0) {
+ var element = void 0;
+ switch (unit) {
+ case '%p':
+ element = popperOffsets;
+ break;
+ case '%':
+ case '%r':
+ default:
+ element = referenceOffsets;
+ }
+
+ var rect = getClientRect(element);
+ return rect[measurement] / 100 * value;
+ } else if (unit === 'vh' || unit === 'vw') {
+ // if is a vh or vw, we calculate the size based on the viewport
+ var size = void 0;
+ if (unit === 'vh') {
+ size = Math.max(document.documentElement.clientHeight, window.innerHeight || 0);
+ } else {
+ size = Math.max(document.documentElement.clientWidth, window.innerWidth || 0);
+ }
+ return size / 100 * value;
+ } else {
+ // if is an explicit pixel unit, we get rid of the unit and keep the value
+ // if is an implicit unit, it's px, and we return just the value
+ return value;
+ }
+}
+
+/**
+ * Parse an `offset` string to extrapolate `x` and `y` numeric offsets.
+ * @function
+ * @memberof {modifiers~offset}
+ * @private
+ * @argument {String} offset
+ * @argument {Object} popperOffsets
+ * @argument {Object} referenceOffsets
+ * @argument {String} basePlacement
+ * @returns {Array} a two cells array with x and y offsets in numbers
+ */
+function parseOffset(offset, popperOffsets, referenceOffsets, basePlacement) {
+ var offsets = [0, 0];
+
+ // Use height if placement is left or right and index is 0 otherwise use width
+ // in this way the first offset will use an axis and the second one
+ // will use the other one
+ var useHeight = ['right', 'left'].indexOf(basePlacement) !== -1;
+
+ // Split the offset string to obtain a list of values and operands
+ // The regex addresses values with the plus or minus sign in front (+10, -20, etc)
+ var fragments = offset.split(/(\+|\-)/).map(function (frag) {
+ return frag.trim();
+ });
+
+ // Detect if the offset string contains a pair of values or a single one
+ // they could be separated by comma or space
+ var divider = fragments.indexOf(find(fragments, function (frag) {
+ return frag.search(/,|\s/) !== -1;
+ }));
+
+ if (fragments[divider] && fragments[divider].indexOf(',') === -1) {
+ console.warn('Offsets separated by white space(s) are deprecated, use a comma (,) instead.');
+ }
+
+ // If divider is found, we divide the list of values and operands to divide
+ // them by ofset X and Y.
+ var splitRegex = /\s*,\s*|\s+/;
+ 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];
+
+ // Convert the values with units to absolute pixels to allow our computations
+ ops = ops.map(function (op, index) {
+ // Most of the units rely on the orientation of the popper
+ var measurement = (index === 1 ? !useHeight : useHeight) ? 'height' : 'width';
+ var mergeWithPrevious = false;
+ return op
+ // This aggregates any `+` or `-` sign that aren't considered operators
+ // e.g.: 10 + +5 => [10, +, +5]
+ .reduce(function (a, b) {
+ if (a[a.length - 1] === '' && ['+', '-'].indexOf(b) !== -1) {
+ a[a.length - 1] = b;
+ mergeWithPrevious = true;
+ return a;
+ } else if (mergeWithPrevious) {
+ a[a.length - 1] += b;
+ mergeWithPrevious = false;
+ return a;
+ } else {
+ return a.concat(b);
+ }
+ }, [])
+ // Here we convert the string values into number values (in px)
+ .map(function (str) {
+ return toValue(str, measurement, popperOffsets, referenceOffsets);
+ });
+ });
+
+ // Loop trough the offsets arrays and execute the operations
+ ops.forEach(function (op, index) {
+ op.forEach(function (frag, index2) {
+ if (isNumeric(frag)) {
+ offsets[index] += frag * (op[index2 - 1] === '-' ? -1 : 1);
+ }
+ });
+ });
+ return offsets;
+}
+
+/**
+ * @function
+ * @memberof Modifiers
+ * @argument {Object} data - The data object generated by update method
+ * @argument {Object} options - Modifiers configuration and options
+ * @argument {Number|String} options.offset=0
+ * The offset value as described in the modifier description
+ * @returns {Object} The data object, properly modified
+ */
+function offset(data, _ref) {
+ var offset = _ref.offset;
+ var placement = data.placement,
+ _data$offsets = data.offsets,
+ popper = _data$offsets.popper,
+ reference = _data$offsets.reference;
+
+ var basePlacement = placement.split('-')[0];
+
+ var offsets = void 0;
+ if (isNumeric(+offset)) {
+ offsets = [+offset, 0];
+ } else {
+ offsets = parseOffset(offset, popper, reference, basePlacement);
+ }
+
+ if (basePlacement === 'left') {
+ popper.top += offsets[0];
+ popper.left -= offsets[1];
+ } else if (basePlacement === 'right') {
+ popper.top += offsets[0];
+ popper.left += offsets[1];
+ } else if (basePlacement === 'top') {
+ popper.left += offsets[0];
+ popper.top -= offsets[1];
+ } else if (basePlacement === 'bottom') {
+ popper.left += offsets[0];
+ popper.top += offsets[1];
+ }
+
+ data.popper = popper;
+ return data;
+}
+
+/**
+ * @function
+ * @memberof Modifiers
+ * @argument {Object} data - The data object generated by `update` method
+ * @argument {Object} options - Modifiers configuration and options
+ * @returns {Object} The data object, properly modified
+ */
+function preventOverflow(data, options) {
+ var boundariesElement = options.boundariesElement || getOffsetParent(data.instance.popper);
+ var boundaries = getBoundaries(data.instance.popper, data.instance.reference, options.padding, boundariesElement);
+ options.boundaries = boundaries;
+
+ var order = options.priority;
+ var popper = getClientRect(data.offsets.popper);
+
+ var check = {
+ primary: function primary(placement) {
+ var value = popper[placement];
+ if (popper[placement] < boundaries[placement] && !options.escapeWithReference) {
+ value = Math.max(popper[placement], boundaries[placement]);
+ }
+ return defineProperty({}, placement, value);
+ },
+ secondary: function secondary(placement) {
+ var mainSide = placement === 'right' ? 'left' : 'top';
+ var value = popper[mainSide];
+ if (popper[placement] > boundaries[placement] && !options.escapeWithReference) {
+ value = Math.min(popper[mainSide], boundaries[placement] - (placement === 'right' ? popper.width : popper.height));
+ }
+ return defineProperty({}, mainSide, value);
+ }
+ };
+
+ order.forEach(function (placement) {
+ var side = ['left', 'top'].indexOf(placement) !== -1 ? 'primary' : 'secondary';
+ popper = _extends({}, popper, check[side](placement));
+ });
+
+ data.offsets.popper = popper;
+
+ return data;
+}
+
+/**
+ * @function
+ * @memberof Modifiers
+ * @argument {Object} data - The data object generated by `update` method
+ * @argument {Object} options - Modifiers configuration and options
+ * @returns {Object} The data object, properly modified
+ */
+function shift(data) {
+ var placement = data.placement;
+ var basePlacement = placement.split('-')[0];
+ var shiftvariation = placement.split('-')[1];
+
+ // if shift shiftvariation is specified, run the modifier
+ if (shiftvariation) {
+ var reference = data.offsets.reference;
+ var popper = getClientRect(data.offsets.popper);
+ var isVertical = ['bottom', 'top'].indexOf(basePlacement) !== -1;
+ var side = isVertical ? 'left' : 'top';
+ var measurement = isVertical ? 'width' : 'height';
+
+ var shiftOffsets = {
+ start: defineProperty({}, side, reference[side]),
+ end: defineProperty({}, side, reference[side] + reference[measurement] - popper[measurement])
+ };
+
+ data.offsets.popper = _extends({}, popper, shiftOffsets[shiftvariation]);
+ }
+
+ return data;
+}
+
+/**
+ * @function
+ * @memberof Modifiers
+ * @argument {Object} data - The data object generated by update method
+ * @argument {Object} options - Modifiers configuration and options
+ * @returns {Object} The data object, properly modified
+ */
+function hide(data) {
+ if (!isModifierRequired(data.instance.modifiers, 'hide', 'preventOverflow')) {
+ return data;
+ }
+
+ var refRect = data.offsets.reference;
+ var bound = find(data.instance.modifiers, function (modifier) {
+ return modifier.name === 'preventOverflow';
+ }).boundaries;
+
+ if (refRect.bottom < bound.top || refRect.left > bound.right || refRect.top > bound.bottom || refRect.right < bound.left) {
+ // Avoid unnecessary DOM access if visibility hasn't changed
+ if (data.hide === true) {
+ return data;
+ }
+
+ data.hide = true;
+ data.attributes['x-out-of-boundaries'] = '';
+ } else {
+ // Avoid unnecessary DOM access if visibility hasn't changed
+ if (data.hide === false) {
+ return data;
+ }
+
+ data.hide = false;
+ data.attributes['x-out-of-boundaries'] = false;
+ }
+
+ return data;
+}
+
+/**
+ * @function
+ * @memberof Modifiers
+ * @argument {Object} data - The data object generated by `update` method
+ * @argument {Object} options - Modifiers configuration and options
+ * @returns {Object} The data object, properly modified
+ */
+function inner(data) {
+ var placement = data.placement;
+ var basePlacement = placement.split('-')[0];
+ var popper = getClientRect(data.offsets.popper);
+ var reference = getClientRect(data.offsets.reference);
+ var isHoriz = ['left', 'right'].indexOf(basePlacement) !== -1;
+
+ var subtractLength = ['top', 'left'].indexOf(basePlacement) === -1;
+
+ popper[isHoriz ? 'left' : 'top'] = reference[placement] - (subtractLength ? popper[isHoriz ? 'width' : 'height'] : 0);
+
+ data.placement = getOppositePlacement(placement);
+ data.offsets.popper = getClientRect(popper);
+
+ return data;
+}
+
+/**
+ * Modifier function, each modifier can have a function of this type assigned
+ * to its `fn` property.<br />
+ * These functions will be called on each update, this means that you must
+ * make sure they are performant enough to avoid performance bottlenecks.
+ *
+ * @function ModifierFn
+ * @argument {dataObject} data - The data object generated by `update` method
+ * @argument {Object} options - Modifiers configuration and options
+ * @returns {dataObject} The data object, properly modified
+ */
+
+/**
+ * Modifiers are plugins used to alter the behavior of your poppers.<br />
+ * Popper.js uses a set of 9 modifiers to provide all the basic functionalities
+ * needed by the library.
+ *
+ * Usually you don't want to override the `order`, `fn` and `onLoad` props.
+ * All the other properties are configurations that could be tweaked.
+ * @namespace modifiers
+ */
+var modifiers = {
+ /**
+ * Modifier used to shift the popper on the start or end of its reference
+ * element.<br />
+ * It will read the variation of the `placement` property.<br />
+ * It can be one either `-end` or `-start`.
+ * @memberof modifiers
+ * @inner
+ */
+ shift: {
+ /** @prop {number} order=100 - Index used to define the order of execution */
+ order: 100,
+ /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
+ enabled: true,
+ /** @prop {ModifierFn} */
+ fn: shift
+ },
+
+ /**
+ * The `offset` modifier can shift your popper on both its axis.
+ *
+ * It accepts the following units:
+ * - `px` or unitless, interpreted as pixels
+ * - `%` or `%r`, percentage relative to the length of the reference element
+ * - `%p`, percentage relative to the length of the popper element
+ * - `vw`, CSS viewport width unit
+ * - `vh`, CSS viewport height unit
+ *
+ * For length is intended the main axis relative to the placement of the popper.<br />
+ * This means that if the placement is `top` or `bottom`, the length will be the
+ * `width`. In case of `left` or `right`, it will be the height.
+ *
+ * You can provide a single value (as `Number` or `String`), or a pair of values
+ * as `String` divided by a comma or one (or more) white spaces.<br />
+ * The latter is a deprecated method because it leads to confusion and will be
+ * removed in v2.<br />
+ * Additionally, it accepts additions and subtractions between different units.
+ * Note that multiplications and divisions aren't supported.
+ *
+ * Valid examples are:
+ * ```
+ * 10
+ * '10%'
+ * '10, 10'
+ * '10%, 10'
+ * '10 + 10%'
+ * '10 - 5vh + 3%'
+ * '-10px + 5vh, 5px - 6%'
+ * ```
+ *
+ * @memberof modifiers
+ * @inner
+ */
+ offset: {
+ /** @prop {number} order=200 - Index used to define the order of execution */
+ order: 200,
+ /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
+ enabled: true,
+ /** @prop {ModifierFn} */
+ fn: offset,
+ /** @prop {Number|String} offset=0
+ * The offset value as described in the modifier description
+ */
+ offset: 0
+ },
+
+ /**
+ * Modifier used to prevent the popper from being positioned outside the boundary.
+ *
+ * An scenario exists where the reference itself is not within the boundaries.<br />
+ * We can say it has "escaped the boundaries" — or just "escaped".<br />
+ * In this case we need to decide whether the popper should either:
+ *
+ * - detach from the reference and remain "trapped" in the boundaries, or
+ * - if it should ignore the boundary and "escape with its reference"
+ *
+ * When `escapeWithReference` is set to`true` and reference is completely
+ * outside its boundaries, the popper will overflow (or completely leave)
+ * the boundaries in order to remain attached to the edge of the reference.
+ *
+ * @memberof modifiers
+ * @inner
+ */
+ preventOverflow: {
+ /** @prop {number} order=300 - Index used to define the order of execution */
+ order: 300,
+ /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
+ enabled: true,
+ /** @prop {ModifierFn} */
+ fn: preventOverflow,
+ /**
+ * @prop {Array} priority=['left', 'right', 'top', 'bottom']
+ * Popper will try to prevent overflow following these priorities by default,
+ * then, it could overflow on the left and on top of the `boundariesElement`
+ */
+ priority: ['left', 'right', 'top', 'bottom'],
+ /**
+ * @prop {number} padding=5
+ * Amount of pixel used to define a minimum distance between the boundaries
+ * and the popper this makes sure the popper has always a little padding
+ * between the edges of its container
+ */
+ padding: 5,
+ /**
+ * @prop {String|HTMLElement} boundariesElement='scrollParent'
+ * Boundaries used by the modifier, can be `scrollParent`, `window`,
+ * `viewport` or any DOM element.
+ */
+ boundariesElement: 'scrollParent'
+ },
+
+ /**
+ * Modifier used to make sure the reference and its popper stay near eachothers
+ * without leaving any gap between the two. Expecially useful when the arrow is
+ * enabled and you want to assure it to point to its reference element.
+ * It cares only about the first axis, you can still have poppers with margin
+ * between the popper and its reference element.
+ * @memberof modifiers
+ * @inner
+ */
+ keepTogether: {
+ /** @prop {number} order=400 - Index used to define the order of execution */
+ order: 400,
+ /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
+ enabled: true,
+ /** @prop {ModifierFn} */
+ fn: keepTogether
+ },
+
+ /**
+ * This modifier is used to move the `arrowElement` of the popper to make
+ * sure it is positioned between the reference element and its popper element.
+ * It will read the outer size of the `arrowElement` node to detect how many
+ * pixels of conjuction are needed.
+ *
+ * It has no effect if no `arrowElement` is provided.
+ * @memberof modifiers
+ * @inner
+ */
+ arrow: {
+ /** @prop {number} order=500 - Index used to define the order of execution */
+ order: 500,
+ /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
+ enabled: true,
+ /** @prop {ModifierFn} */
+ fn: arrow,
+ /** @prop {String|HTMLElement} element='[x-arrow]' - Selector or node used as arrow */
+ element: '[x-arrow]'
+ },
+
+ /**
+ * Modifier used to flip the popper's placement when it starts to overlap its
+ * reference element.
+ *
+ * Requires the `preventOverflow` modifier before it in order to work.
+ *
+ * **NOTE:** this modifier will interrupt the current update cycle and will
+ * restart it if it detects the need to flip the placement.
+ * @memberof modifiers
+ * @inner
+ */
+ flip: {
+ /** @prop {number} order=600 - Index used to define the order of execution */
+ order: 600,
+ /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
+ enabled: true,
+ /** @prop {ModifierFn} */
+ fn: flip,
+ /**
+ * @prop {String|Array} behavior='flip'
+ * The behavior used to change the popper's placement. It can be one of
+ * `flip`, `clockwise`, `counterclockwise` or an array with a list of valid
+ * placements (with optional variations).
+ */
+ behavior: 'flip',
+ /**
+ * @prop {number} padding=5
+ * The popper will flip if it hits the edges of the `boundariesElement`
+ */
+ padding: 5,
+ /**
+ * @prop {String|HTMLElement} boundariesElement='viewport'
+ * The element which will define the boundaries of the popper position,
+ * the popper will never be placed outside of the defined boundaries
+ * (except if keepTogether is enabled)
+ */
+ boundariesElement: 'viewport'
+ },
+
+ /**
+ * Modifier used to make the popper flow toward the inner of the reference element.
+ * By default, when this modifier is disabled, the popper will be placed outside
+ * the reference element.
+ * @memberof modifiers
+ * @inner
+ */
+ inner: {
+ /** @prop {number} order=700 - Index used to define the order of execution */
+ order: 700,
+ /** @prop {Boolean} enabled=false - Whether the modifier is enabled or not */
+ enabled: false,
+ /** @prop {ModifierFn} */
+ fn: inner
+ },
+
+ /**
+ * Modifier used to hide the popper when its reference element is outside of the
+ * popper boundaries. It will set a `x-out-of-boundaries` attribute which can
+ * be used to hide with a CSS selector the popper when its reference is
+ * out of boundaries.
+ *
+ * Requires the `preventOverflow` modifier before it in order to work.
+ * @memberof modifiers
+ * @inner
+ */
+ hide: {
+ /** @prop {number} order=800 - Index used to define the order of execution */
+ order: 800,
+ /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
+ enabled: true,
+ /** @prop {ModifierFn} */
+ fn: hide
+ },
+
+ /**
+ * Applies the computed styles to the popper element.
+ *
+ * All the DOM manipulations are limited to this modifier. This is useful in case
+ * you want to integrate Popper.js inside a framework or view library and you
+ * want to delegate all the DOM manipulations to it.
+ *
+ * Just disable this modifier and define you own to achieve the desired effect.
+ *
+ * @memberof modifiers
+ * @inner
+ */
+ applyStyle: {
+ /** @prop {number} order=900 - Index used to define the order of execution */
+ order: 900,
+ /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
+ enabled: true,
+ /** @prop {ModifierFn} */
+ fn: applyStyle,
+ /** @prop {Function} */
+ onLoad: applyStyleOnLoad,
+ /**
+ * @prop {Boolean} gpuAcceleration=true
+ * If true, it uses the CSS 3d transformation to position the popper.
+ * Otherwise, it will use the `top` and `left` properties.
+ */
+ gpuAcceleration: true
+ }
+};
+
+/**
+ * The `dataObject` is an object containing all the informations used by Popper.js
+ * this object get passed to modifiers and to the `onCreate` and `onUpdate` callbacks.
+ * @name dataObject
+ * @property {Object} data.instance The Popper.js instance
+ * @property {String} data.placement Placement applied to popper
+ * @property {String} data.originalPlacement Placement originally defined on init
+ * @property {Boolean} data.flipped True if popper has been flipped by flip modifier
+ * @property {Boolean} data.hide True if the reference element is out of boundaries, useful to know when to hide the popper.
+ * @property {HTMLElement} data.arrowElement Node used as arrow by arrow modifier
+ * @property {Object} data.styles Any CSS property defined here will be applied to the popper, it expects the JavaScript nomenclature (eg. `marginBottom`)
+ * @property {Object} data.boundaries Offsets of the popper boundaries
+ * @property {Object} data.offsets The measurements of popper, reference and arrow elements.
+ * @property {Object} data.offsets.popper `top`, `left`, `width`, `height` values
+ * @property {Object} data.offsets.reference `top`, `left`, `width`, `height` values
+ * @property {Object} data.offsets.arrow] `top` and `left` offsets, only one of them will be different from 0
+ */
+
+/**
+ * Default options provided to Popper.js constructor.<br />
+ * These can be overriden using the `options` argument of Popper.js.<br />
+ * To override an option, simply pass as 3rd argument an object with the same
+ * structure of this object, example:
+ * ```
+ * new Popper(ref, pop, {
+ * modifiers: {
+ * preventOverflow: { enabled: false }
+ * }
+ * })
+ * ```
+ * @type {Object}
+ * @static
+ * @memberof Popper
+ */
+var DEFAULTS = {
+ /**
+ * Popper's placement
+ * @prop {Popper.placements} placement='bottom'
+ */
+ placement: 'bottom',
+
+ /**
+ * Whether events (resize, scroll) are initially enabled
+ * @prop {Boolean} eventsEnabled=true
+ */
+ eventsEnabled: true,
+
+ /**
+ * Set to true if you want to automatically remove the popper when
+ * you call the `destroy` method.
+ * @prop {Boolean} removeOnDestroy=false
+ */
+ removeOnDestroy: false,
+
+ /**
+ * Callback called when the popper is created.<br />
+ * By default, is set to no-op.<br />
+ * Access Popper.js instance with `data.instance`.
+ * @prop {onCreate}
+ */
+ onCreate: function onCreate() {},
+
+ /**
+ * Callback called when the popper is updated, this callback is not called
+ * on the initialization/creation of the popper, but only on subsequent
+ * updates.<br />
+ * By default, is set to no-op.<br />
+ * Access Popper.js instance with `data.instance`.
+ * @prop {onUpdate}
+ */
+ onUpdate: function onUpdate() {},
+
+ /**
+ * List of modifiers used to modify the offsets before they are applied to the popper.
+ * They provide most of the functionalities of Popper.js
+ * @prop {modifiers}
+ */
+ modifiers: modifiers
+};
+
+/**
+ * @callback onCreate
+ * @param {dataObject} data
+ */
+
+/**
+ * @callback onUpdate
+ * @param {dataObject} data
+ */
+
+// Utils
+// Methods
+var Popper = function () {
+ /**
+ * Create a new Popper.js instance
+ * @class Popper
+ * @param {HTMLElement|referenceObject} reference - The reference element used to position the popper
+ * @param {HTMLElement} popper - The HTML element used as popper.
+ * @param {Object} options - Your custom options to override the ones defined in [DEFAULTS](#defaults)
+ * @return {Object} instance - The generated Popper.js instance
+ */
+ function Popper(reference, popper) {
+ var _this = this;
+
+ var options = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};
+ classCallCheck(this, Popper);
+
+ this.scheduleUpdate = function () {
+ return requestAnimationFrame(_this.update);
+ };
+
+ // make update() debounced, so that it only runs at most once-per-tick
+ this.update = debounce(this.update.bind(this));
+
+ // with {} we create a new object with the options inside it
+ this.options = _extends({}, Popper.Defaults, options);
+
+ // init state
+ this.state = {
+ isDestroyed: false,
+ isCreated: false,
+ scrollParents: []
+ };
+
+ // get reference and popper elements (allow jQuery wrappers)
+ this.reference = reference.jquery ? reference[0] : reference;
+ this.popper = popper.jquery ? popper[0] : popper;
+
+ // make sure to apply the popper position before any computation
+ setStyles(this.popper, { position: 'absolute' });
+
+ // Deep merge modifiers options
+ this.options.modifiers = {};
+ Object.keys(_extends({}, Popper.Defaults.modifiers, options.modifiers)).forEach(function (name) {
+ _this.options.modifiers[name] = _extends({}, Popper.Defaults.modifiers[name] || {}, options.modifiers ? options.modifiers[name] : {});
+ });
+
+ // Refactoring modifiers' list (Object => Array)
+ this.modifiers = Object.keys(this.options.modifiers).map(function (name) {
+ return _extends({
+ name: name
+ }, _this.options.modifiers[name]);
+ })
+ // sort the modifiers by order
+ .sort(function (a, b) {
+ return a.order - b.order;
+ });
+
+ // modifiers have the ability to execute arbitrary code when Popper.js get inited
+ // such code is executed in the same order of its modifier
+ // they could add new properties to their options configuration
+ // BE AWARE: don't add options to `options.modifiers.name` but to `modifierOptions`!
+ this.modifiers.forEach(function (modifierOptions) {
+ if (modifierOptions.enabled && isFunction(modifierOptions.onLoad)) {
+ modifierOptions.onLoad(_this.reference, _this.popper, _this.options, modifierOptions, _this.state);
+ }
+ });
+
+ // fire the first update to position the popper in the right place
+ this.update();
+
+ var eventsEnabled = this.options.eventsEnabled;
+ if (eventsEnabled) {
+ // setup event listeners, they will take care of update the position in specific situations
+ this.enableEventListeners();
+ }
+
+ this.state.eventsEnabled = eventsEnabled;
+ }
+
+ // We can't use class properties because they don't get listed in the
+ // class prototype and break stuff like Sinon stubs
+
+
+ createClass(Popper, [{
+ key: 'update',
+ value: function update$$1() {
+ return update.call(this);
+ }
+ }, {
+ key: 'destroy',
+ value: function destroy$$1() {
+ return destroy.call(this);
+ }
+ }, {
+ key: 'enableEventListeners',
+ value: function enableEventListeners$$1() {
+ return enableEventListeners.call(this);
+ }
+ }, {
+ key: 'disableEventListeners',
+ value: function disableEventListeners$$1() {
+ return disableEventListeners.call(this);
+ }
+
+ /**
+ * Schedule an update, it will run on the next UI update available
+ * @method scheduleUpdate
+ * @memberof Popper
+ */
+
+
+ /**
+ * Collection of utilities useful when writing custom modifiers.
+ * Starting from version 1.7, this method is available only if you
+ * include `popper-utils.js` before `popper.js`.
+ *
+ * **DEPRECATION**: This way to access PopperUtils is deprecated
+ * and will be removed in v2! Use the PopperUtils module directly instead.
+ * @static
+ * @type {Object}
+ * @deprecated since version 1.8
+ * @member Utils
+ * @memberof Popper
+ */
+
+ }]);
+ return Popper;
+}();
+
+/**
+ * The `referenceObject` is an object that provides an interface compatible with Popper.js
+ * and lets you use it as replacement of a real DOM node.<br />
+ * You can use this method to position a popper relatively to a set of coordinates
+ * in case you don't have a DOM node to use as reference.
+ *
+ * ```
+ * new Popper(referenceObject, popperNode);
+ * ```
+ *
+ * NB: This feature isn't supported in Internet Explorer 10
+ * @name referenceObject
+ * @property {Function} data.getBoundingClientRect
+ * A function that returns a set of coordinates compatible with the native `getBoundingClientRect` method.
+ * @property {number} data.clientWidth
+ * An ES6 getter that will return the width of the virtual reference element.
+ * @property {number} data.clientHeight
+ * An ES6 getter that will return the height of the virtual reference element.
+ */
+
+
+Popper.Utils = (typeof window !== 'undefined' ? window : global).PopperUtils;
+Popper.placements = placements;
+Popper.Defaults = DEFAULTS;
+
+return Popper;
+
+})));
+//# sourceMappingURL=popper.js.map
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-11 11:31:39 +0000