Merge branch 'dev' of https://github.com/redmatrix/hubzilla into xdev_merge

1 files changed, 0 insertions, 2269 deletions

diff --git a/library/popper/popper.js b/library/popper/popper.js
deleted file mode 100644
index ce29a6aec..000000000
--- a/library/popper/popper.js
+++ /dev/null
@@ -1,2269 +0,0 @@
-(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
-