One Hat Cyber Team

View File Name : v-tooltip.umd.js

(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
  typeof define === 'function' && define.amd ? define(['exports'], factory) :
  (global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory(global['v-tooltip'] = {}));
}(this, (function (exports) { 'use strict';

  function _typeof(obj) {
    "@babel/helpers - typeof";

    if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") {
      _typeof = function _typeof(obj) {
        return typeof obj;
      };
    } else {
      _typeof = function _typeof(obj) {
        return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
      };
    }

    return _typeof(obj);
  }

  function _defineProperty$1(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;
  }

  function _classCallCheck(instance, Constructor) {
    if (!(instance instanceof Constructor)) {
      throw new TypeError("Cannot call a class as a 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);
    }
  }

  function _createClass(Constructor, protoProps, staticProps) {
    if (protoProps) _defineProperties(Constructor.prototype, protoProps);
    if (staticProps) _defineProperties(Constructor, staticProps);
    return Constructor;
  }

  /**!
   * @fileOverview Kickass library to create and place poppers near their reference elements.
   * @version 1.16.1
   * @license
   * Copyright (c) 2016 Federico Zivolo and contributors
   *
   * Permission is hereby granted, free of charge, to any person obtaining a copy
   * of this software and associated documentation files (the "Software"), to deal
   * in the Software without restriction, including without limitation the rights
   * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   * copies of the Software, and to permit persons to whom the Software is
   * furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in all
   * copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
   * SOFTWARE.
   */
  var isBrowser = typeof window !== 'undefined' && typeof document !== 'undefined' && typeof navigator !== 'undefined';

  var timeoutDuration = function () {
    var longerTimeoutBrowsers = ['Edge', 'Trident', 'Firefox'];
    for (var i = 0; i < longerTimeoutBrowsers.length; i += 1) {
      if (isBrowser && navigator.userAgent.indexOf(longerTimeoutBrowsers[i]) >= 0) {
        return 1;
      }
    }
    return 0;
  }();

  function microtaskDebounce(fn) {
    var called = false;
    return function () {
      if (called) {
        return;
      }
      called = true;
      window.Promise.resolve().then(function () {
        called = false;
        fn();
      });
    };
  }

  function taskDebounce(fn) {
    var scheduled = false;
    return function () {
      if (!scheduled) {
        scheduled = true;
        setTimeout(function () {
          scheduled = false;
          fn();
        }, timeoutDuration);
      }
    };
  }

  var supportsMicroTasks = isBrowser && window.Promise;

  /**
  * 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 = supportsMicroTasks ? microtaskDebounce : taskDebounce;

  /**
   * 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$1(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 window = element.ownerDocument.defaultView;
    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) {
      return document.body;
    }

    switch (element.nodeName) {
      case 'HTML':
      case 'BODY':
        return element.ownerDocument.body;
      case '#document':
        return element.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|overlay)/.test(overflow + overflowY + overflowX)) {
      return element;
    }

    return getScrollParent(getParentNode(element));
  }

  /**
   * Returns the reference node of the reference object, or the reference object itself.
   * @method
   * @memberof Popper.Utils
   * @param {Element|Object} reference - the reference element (the popper will be relative to this)
   * @returns {Element} parent
   */
  function getReferenceNode(reference) {
    return reference && reference.referenceNode ? reference.referenceNode : reference;
  }

  var isIE11 = isBrowser && !!(window.MSInputMethodContext && document.documentMode);
  var isIE10 = isBrowser && /MSIE 10/.test(navigator.userAgent);

  /**
   * Determines if the browser is Internet Explorer
   * @method
   * @memberof Popper.Utils
   * @param {Number} version to check
   * @returns {Boolean} isIE
   */
  function isIE$1(version) {
    if (version === 11) {
      return isIE11;
    }
    if (version === 10) {
      return isIE10;
    }
    return isIE11 || isIE10;
  }

  /**
   * Returns the offset parent of the given element
   * @method
   * @memberof Popper.Utils
   * @argument {Element} element
   * @returns {Element} offset parent
   */
  function getOffsetParent(element) {
    if (!element) {
      return document.documentElement;
    }

    var noOffsetParent = isIE$1(10) ? document.body : null;

    // NOTE: 1 DOM access here
    var offsetParent = element.offsetParent || null;
    // Skip hidden elements which don't have an offsetParent
    while (offsetParent === noOffsetParent && element.nextElementSibling) {
      offsetParent = (element = element.nextElementSibling).offsetParent;
    }

    var nodeName = offsetParent && offsetParent.nodeName;

    if (!nodeName || nodeName === 'BODY' || nodeName === 'HTML') {
      return element ? element.ownerDocument.documentElement : document.documentElement;
    }

    // .offsetParent will return the closest TH, TD or TABLE in case
    // no offsetParent is present, I hate this job...
    if (['TH', 'TD', 'TABLE'].indexOf(offsetParent.nodeName) !== -1 && getStyleComputedProperty(offsetParent, 'position') === 'static') {
      return getOffsetParent(offsetParent);
    }

    return offsetParent;
  }

  function isOffsetContainer(element) {
    var nodeName = element.nodeName;

    if (nodeName === 'BODY') {
      return false;
    }
    return nodeName === 'HTML' || getOffsetParent(element.firstElementChild) === 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;
  }

  /**
   * 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 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 = element.ownerDocument.documentElement;
      var scrollingElement = element.ownerDocument.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 parseFloat(styles['border' + sideA + 'Width']) + parseFloat(styles['border' + sideB + 'Width']);
  }

  function getSize(axis, body, html, computedStyle) {
    return Math.max(body['offset' + axis], body['scroll' + axis], html['client' + axis], html['offset' + axis], html['scroll' + axis], isIE$1(10) ? parseInt(html['offset' + axis]) + parseInt(computedStyle['margin' + (axis === 'Height' ? 'Top' : 'Left')]) + parseInt(computedStyle['margin' + (axis === 'Height' ? 'Bottom' : 'Right')]) : 0);
  }

  function getWindowSizes(document) {
    var body = document.body;
    var html = document.documentElement;
    var computedStyle = isIE$1(10) && 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$1 = 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
    try {
      if (isIE$1(10)) {
        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;
      } else {
        rect = element.getBoundingClientRect();
      }
    } catch (e) {}

    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(element.ownerDocument) : {};
    var width = sizes.width || element.clientWidth || result.width;
    var height = sizes.height || element.clientHeight || result.height;

    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 fixedPosition = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : false;

    var isIE10 = isIE$1(10);
    var isHTML = parent.nodeName === 'HTML';
    var childrenRect = getBoundingClientRect(children);
    var parentRect = getBoundingClientRect(parent);
    var scrollParent = getScrollParent(children);

    var styles = getStyleComputedProperty(parent);
    var borderTopWidth = parseFloat(styles.borderTopWidth);
    var borderLeftWidth = parseFloat(styles.borderLeftWidth);

    // In cases where the parent is fixed, we must ignore negative scroll in offset calc
    if (fixedPosition && isHTML) {
      parentRect.top = Math.max(parentRect.top, 0);
      parentRect.left = Math.max(parentRect.left, 0);
    }
    var offsets = getClientRect({
      top: childrenRect.top - parentRect.top - borderTopWidth,
      left: childrenRect.left - parentRect.left - borderLeftWidth,
      width: childrenRect.width,
      height: childrenRect.height
    });
    offsets.marginTop = 0;
    offsets.marginLeft = 0;

    // 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 (!isIE10 && isHTML) {
      var marginTop = parseFloat(styles.marginTop);
      var marginLeft = parseFloat(styles.marginLeft);

      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 && !fixedPosition ? parent.contains(scrollParent) : parent === scrollParent && scrollParent.nodeName !== 'BODY') {
      offsets = includeScroll(offsets, parent);
    }

    return offsets;
  }

  function getViewportOffsetRectRelativeToArtbitraryNode(element) {
    var excludeScroll = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;

    var html = element.ownerDocument.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 = !excludeScroll ? getScroll(html) : 0;
    var scrollLeft = !excludeScroll ? getScroll(html, 'left') : 0;

    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;
    }
    var parentNode = getParentNode(element);
    if (!parentNode) {
      return false;
    }
    return isFixed(parentNode);
  }

  /**
   * Finds the first parent of an element that has a transformed property defined
   * @method
   * @memberof Popper.Utils
   * @argument {Element} element
   * @returns {Element} first transformed parent or documentElement
   */

  function getFixedPositionOffsetParent(element) {
    // This check is needed to avoid errors in case one of the elements isn't defined for any reason
    if (!element || !element.parentElement || isIE$1()) {
      return document.documentElement;
    }
    var el = element.parentElement;
    while (el && getStyleComputedProperty(el, 'transform') === 'none') {
      el = el.parentElement;
    }
    return el || document.documentElement;
  }

  /**
   * 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
   * @param {Boolean} fixedPosition - Is in fixed position mode
   * @returns {Object} Coordinates of the boundaries
   */
  function getBoundaries(popper, reference, padding, boundariesElement) {
    var fixedPosition = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : false;

    // NOTE: 1 DOM access here

    var boundaries = { top: 0, left: 0 };
    var offsetParent = fixedPosition ? getFixedPositionOffsetParent(popper) : findCommonOffsetParent(popper, getReferenceNode(reference));

    // Handle viewport case
    if (boundariesElement === 'viewport') {
      boundaries = getViewportOffsetRectRelativeToArtbitraryNode(offsetParent, fixedPosition);
    } else {
      // Handle other cases based on DOM element used as boundaries
      var boundariesNode = void 0;
      if (boundariesElement === 'scrollParent') {
        boundariesNode = getScrollParent(getParentNode(reference));
        if (boundariesNode.nodeName === 'BODY') {
          boundariesNode = popper.ownerDocument.documentElement;
        }
      } else if (boundariesElement === 'window') {
        boundariesNode = popper.ownerDocument.documentElement;
      } else {
        boundariesNode = boundariesElement;
      }

      var offsets = getOffsetRectRelativeToArbitraryNode(boundariesNode, offsetParent, fixedPosition);

      // In case of HTML, we need a different computation
      if (boundariesNode.nodeName === 'HTML' && !isFixed(offsetParent)) {
        var _getWindowSizes = getWindowSizes(popper.ownerDocument),
            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
    padding = padding || 0;
    var isPaddingNumber = typeof padding === 'number';
    boundaries.left += isPaddingNumber ? padding : padding.left || 0;
    boundaries.top += isPaddingNumber ? padding : padding.top || 0;
    boundaries.right -= isPaddingNumber ? padding : padding.right || 0;
    boundaries.bottom -= isPaddingNumber ? padding : padding.bottom || 0;

    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)
   * @param {Element} fixedPosition - is in fixed position mode
   * @returns {Object} An object containing the offsets which will be applied to the popper
   */
  function getReferenceOffsets(state, popper, reference) {
    var fixedPosition = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : null;

    var commonOffsetParent = fixedPosition ? getFixedPositionOffsetParent(popper) : findCommonOffsetParent(popper, getReferenceNode(reference));
    return getOffsetRectRelativeToArbitraryNode(reference, commonOffsetParent, fixedPosition);
  }

  /**
   * 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 window = element.ownerDocument.defaultView;
    var styles = window.getComputedStyle(element);
    var x = parseFloat(styles.marginTop || 0) + parseFloat(styles.marginBottom || 0);
    var y = parseFloat(styles.marginLeft || 0) + parseFloat(styles.marginRight || 0);
    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']) {
        // eslint-disable-line dot-notation
        console.warn('`modifier.function` is deprecated, use `modifier.fn`!');
      }
      var fn = modifier['function'] || modifier.fn; // eslint-disable-line dot-notation
      if (modifier.enabled && isFunction$1(fn)) {
        // Add properties to offsets to make them a complete clientRect object
        // we do this before each modifier to make sure the previous one doesn't
        // mess with these values
        data.offsets.popper = getClientRect(data.offsets.popper);
        data.offsets.reference = getClientRect(data.offsets.reference);

        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: {},
      arrowStyles: {},
      attributes: {},
      flipped: false,
      offsets: {}
    };

    // compute reference element offsets
    data.offsets.reference = getReferenceOffsets(this.state, this.popper, this.reference, this.options.positionFixed);

    // 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;

    data.positionFixed = this.options.positionFixed;

    // compute the popper offsets
    data.offsets.popper = getPopperOffsets(this.popper, data.offsets.reference, data.placement);

    data.offsets.popper.position = this.options.positionFixed ? 'fixed' : '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 or PascalCase, depending on the vendor prefix)
   */
  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; i++) {
      var prefix = prefixes[i];
      var toCheck = prefix ? '' + prefix + upperProp : property;
      if (typeof document.body.style[toCheck] !== 'undefined') {
        return toCheck;
      }
    }
    return null;
  }

  /**
   * Destroys 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.position = '';
      this.popper.style.top = '';
      this.popper.style.left = '';
      this.popper.style.right = '';
      this.popper.style.bottom = '';
      this.popper.style.willChange = '';
      this.popper.style[getSupportedPropertyName('transform')] = '';
    }

    this.disableEventListeners();

    // remove the popper if user explicitly 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;
  }

  /**
   * Get the window associated with the element
   * @argument {Element} element
   * @returns {Window}
   */
  function getWindow(element) {
    var ownerDocument = element.ownerDocument;
    return ownerDocument ? ownerDocument.defaultView : window;
  }

  function attachToScrollParents(scrollParent, event, callback, scrollParents) {
    var isBody = scrollParent.nodeName === 'BODY';
    var target = isBody ? scrollParent.ownerDocument.defaultView : 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;
    getWindow(reference).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
    getWindow(reference).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) {
      cancelAnimationFrame(this.scheduleUpdate);
      this.state = removeEventListeners(this.reference, this.state);
    }
  }

  /**
   * 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;
    });
  }

  /**
   * 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) {
    // 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, 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, data.attributes);

    // if arrowElement is defined and arrowStyles has some properties
    if (data.arrowElement && Object.keys(data.arrowStyles).length) {
      setStyles(data.arrowElement, data.arrowStyles);
    }

    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, options.positionFixed);

    // 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);

    // Apply `position` to popper before anything else because
    // without the position applied we can't guarantee correct computations
    setStyles(popper, { position: options.positionFixed ? 'fixed' : 'absolute' });

    return options;
  }

  /**
   * @function
   * @memberof Popper.Utils
   * @argument {Object} data - The data object generated by `update` method
   * @argument {Boolean} shouldRound - If the offsets should be rounded at all
   * @returns {Object} The popper's position offsets rounded
   *
   * The tale of pixel-perfect positioning. It's still not 100% perfect, but as
   * good as it can be within reason.
   * Discussion here: https://github.com/FezVrasta/popper.js/pull/715
   *
   * Low DPI screens cause a popper to be blurry if not using full pixels (Safari
   * as well on High DPI screens).
   *
   * Firefox prefers no rounding for positioning and does not have blurriness on
   * high DPI screens.
   *
   * Only horizontal placement and left/right values need to be considered.
   */
  function getRoundedOffsets(data, shouldRound) {
    var _data$offsets = data.offsets,
        popper = _data$offsets.popper,
        reference = _data$offsets.reference;
    var round = Math.round,
        floor = Math.floor;

    var noRound = function noRound(v) {
      return v;
    };

    var referenceWidth = round(reference.width);
    var popperWidth = round(popper.width);

    var isVertical = ['left', 'right'].indexOf(data.placement) !== -1;
    var isVariation = data.placement.indexOf('-') !== -1;
    var sameWidthParity = referenceWidth % 2 === popperWidth % 2;
    var bothOddWidth = referenceWidth % 2 === 1 && popperWidth % 2 === 1;

    var horizontalToInteger = !shouldRound ? noRound : isVertical || isVariation || sameWidthParity ? round : floor;
    var verticalToInteger = !shouldRound ? noRound : round;

    return {
      left: horizontalToInteger(bothOddWidth && !isVariation && shouldRound ? popper.left - 1 : popper.left),
      top: verticalToInteger(popper.top),
      bottom: verticalToInteger(popper.bottom),
      right: horizontalToInteger(popper.right)
    };
  }

  var isFirefox = isBrowser && /Firefox/i.test(navigator.userAgent);

  /**
   * @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 computeStyle(data, options) {
    var x = options.x,
        y = options.y;
    var popper = data.offsets.popper;

    // Remove this legacy support in Popper.js v2

    var legacyGpuAccelerationOption = find(data.instance.modifiers, function (modifier) {
      return modifier.name === 'applyStyle';
    }).gpuAcceleration;
    if (legacyGpuAccelerationOption !== undefined) {
      console.warn('WARNING: `gpuAcceleration` option moved to `computeStyle` modifier and will not be supported in future versions of Popper.js!');
    }
    var gpuAcceleration = legacyGpuAccelerationOption !== undefined ? legacyGpuAccelerationOption : options.gpuAcceleration;

    var offsetParent = getOffsetParent(data.instance.popper);
    var offsetParentRect = getBoundingClientRect(offsetParent);

    // Styles
    var styles = {
      position: popper.position
    };

    var offsets = getRoundedOffsets(data, window.devicePixelRatio < 2 || !isFirefox);

    var sideA = x === 'bottom' ? 'top' : 'bottom';
    var sideB = y === 'right' ? 'left' : 'right';

    // 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');

    // now, let's make a step back and look at this code closely (wtf?)
    // If the content of the popper grows once it's been positioned, it
    // may happen that the popper gets misplaced because of the new content
    // overflowing its reference element
    // To avoid this problem, we provide two options (x and y), which allow
    // the consumer to define the offset origin.
    // If we position a popper on top of a reference element, we can set
    // `x` to `top` to make the popper grow towards its top instead of
    // its bottom.
    var left = void 0,
        top = void 0;
    if (sideA === 'bottom') {
      // when offsetParent is <html> the positioning is relative to the bottom of the screen (excluding the scrollbar)
      // and not the bottom of the html element
      if (offsetParent.nodeName === 'HTML') {
        top = -offsetParent.clientHeight + offsets.bottom;
      } else {
        top = -offsetParentRect.height + offsets.bottom;
      }
    } else {
      top = offsets.top;
    }
    if (sideB === 'right') {
      if (offsetParent.nodeName === 'HTML') {
        left = -offsetParent.clientWidth + offsets.right;
      } else {
        left = -offsetParentRect.width + offsets.right;
      }
    } else {
      left = offsets.left;
    }
    if (gpuAcceleration && prefixedProperty) {
      styles[prefixedProperty] = 'translate3d(' + left + 'px, ' + top + 'px, 0)';
      styles[sideA] = 0;
      styles[sideB] = 0;
      styles.willChange = 'transform';
    } else {
      // othwerise, we use the standard `top`, `left`, `bottom` and `right` properties
      var invertTop = sideA === 'bottom' ? -1 : 1;
      var invertLeft = sideB === 'right' ? -1 : 1;
      styles[sideA] = top * invertTop;
      styles[sideB] = left * invertLeft;
      styles.willChange = sideA + ', ' + sideB;
    }

    // Attributes
    var attributes = {
      'x-placement': data.placement
    };

    // Update `data` attributes, styles and arrowStyles
    data.attributes = _extends({}, attributes, data.attributes);
    data.styles = _extends({}, styles, data.styles);
    data.arrowStyles = _extends({}, data.offsets.arrow, data.arrowStyles);

    return data;
  }

  /**
   * 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) {
    var _data$offsets$arrow;

    // 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 _data$offsets = data.offsets,
        popper = _data$offsets.popper,
        reference = _data$offsets.reference;

    var isVertical = ['left', 'right'].indexOf(placement) !== -1;

    var len = isVertical ? 'height' : 'width';
    var sideCapitalized = isVertical ? 'Top' : 'Left';
    var side = sideCapitalized.toLowerCase();
    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 conjunction
    //

    // 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];
    }
    data.offsets.popper = getClientRect(data.offsets.popper);

    // compute center of the popper
    var center = reference[side] + reference[len] / 2 - arrowElementSize / 2;

    // Compute the sideValue using the updated popper offsets
    // take popper margin in account because we don't have this info available
    var css = getStyleComputedProperty(data.instance.popper);
    var popperMarginSide = parseFloat(css['margin' + sideCapitalized]);
    var popperBorderSide = parseFloat(css['border' + sideCapitalized + 'Width']);
    var sideValue = center - data.offsets.popper[side] - popperMarginSide - popperBorderSide;

    // 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 = {}, defineProperty$1(_data$offsets$arrow, side, Math.round(sideValue)), defineProperty$1(_data$offsets$arrow, altSide, ''), _data$offsets$arrow);

    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-end` (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, data.positionFixed);

    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 = 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;

      // flips variation if reference element overflows boundaries
      var flippedVariationByRef = !!options.flipVariations && (isVertical && variation === 'start' && overflowsLeft || isVertical && variation === 'end' && overflowsRight || !isVertical && variation === 'start' && overflowsTop || !isVertical && variation === 'end' && overflowsBottom);

      // flips variation if popper content overflows boundaries
      var flippedVariationByContent = !!options.flipVariationsByContent && (isVertical && variation === 'start' && overflowsRight || isVertical && variation === 'end' && overflowsLeft || !isVertical && variation === 'start' && overflowsBottom || !isVertical && variation === 'end' && overflowsTop);

      var flippedVariation = flippedVariationByRef || flippedVariationByContent;

      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 _data$offsets = data.offsets,
        popper = _data$offsets.popper,
        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);

    // If offsetParent is the reference element, we really want to
    // go one step up and use the next offsetParent as reference to
    // avoid to make this modifier completely useless and look like broken
    if (data.instance.reference === boundariesElement) {
      boundariesElement = getOffsetParent(boundariesElement);
    }

    // NOTE: DOM access here
    // resets the popper's position so that the document size can be calculated excluding
    // the size of the popper element itself
    var transformProp = getSupportedPropertyName('transform');
    var popperStyles = data.instance.popper.style; // assignment to help minification
    var top = popperStyles.top,
        left = popperStyles.left,
        transform = popperStyles[transformProp];

    popperStyles.top = '';
    popperStyles.left = '';
    popperStyles[transformProp] = '';

    var boundaries = getBoundaries(data.instance.popper, data.instance.reference, options.padding, boundariesElement, data.positionFixed);

    // NOTE: DOM access here
    // restores the original style properties after the offsets have been computed
    popperStyles.top = top;
    popperStyles.left = left;
    popperStyles[transformProp] = transform;

    options.boundaries = boundaries;

    var order = options.priority;
    var popper = 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$1({}, 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$1({}, 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 _data$offsets = data.offsets,
          reference = _data$offsets.reference,
          popper = _data$offsets.popper;

      var isVertical = ['bottom', 'top'].indexOf(basePlacement) !== -1;
      var side = isVertical ? 'left' : 'top';
      var measurement = isVertical ? 'width' : 'height';

      var shiftOffsets = {
        start: defineProperty$1({}, side, reference[side]),
        end: defineProperty$1({}, 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 _data$offsets = data.offsets,
        popper = _data$offsets.popper,
        reference = _data$offsets.reference;

    var isHoriz = ['left', 'right'].indexOf(basePlacement) !== -1;

    var subtractLength = ['top', 'left'].indexOf(basePlacement) === -1;

    popper[isHoriz ? 'left' : 'top'] = reference[basePlacement] - (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 unit-less, 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%'
     * ```
     * > **NB**: If you desire to apply offsets to your poppers in a way that may make them overlap
     * > with their reference element, unfortunately, you will have to disable the `flip` modifier.
     * > You can read more on this at this [issue](https://github.com/FezVrasta/popper.js/issues/373).
     *
     * @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.
     *
     * A 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 always has 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 each other
     * without leaving any gap between the two. Especially useful when the arrow is
     * enabled and you want to ensure that it points 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 conjunction 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',
      /**
       * @prop {Boolean} flipVariations=false
       * The popper will switch placement variation between `-start` and `-end` when
       * the reference element overlaps its boundaries.
       *
       * The original placement should have a set variation.
       */
      flipVariations: false,
      /**
       * @prop {Boolean} flipVariationsByContent=false
       * The popper will switch placement variation between `-start` and `-end` when
       * the popper element overlaps its reference boundaries.
       *
       * The original placement should have a set variation.
       */
      flipVariationsByContent: false
    },

    /**
     * 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
    },

    /**
     * Computes the style that will be applied to the popper element to gets
     * properly positioned.
     *
     * Note that this modifier will not touch the DOM, it just prepares the styles
     * so that `applyStyle` modifier can apply it. This separation is useful
     * in case you need to replace `applyStyle` with a custom implementation.
     *
     * This modifier has `850` as `order` value to maintain backward compatibility
     * with previous versions of Popper.js. Expect the modifiers ordering method
     * to change in future major versions of the library.
     *
     * @memberof modifiers
     * @inner
     */
    computeStyle: {
      /** @prop {number} order=850 - Index used to define the order of execution */
      order: 850,
      /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
      enabled: true,
      /** @prop {ModifierFn} */
      fn: computeStyle,
      /**
       * @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,
      /**
       * @prop {string} [x='bottom']
       * Where to anchor the X axis (`bottom` or `top`). AKA X offset origin.
       * Change this if your popper should grow in a direction different from `bottom`
       */
      x: 'bottom',
      /**
       * @prop {string} [x='left']
       * Where to anchor the Y axis (`left` or `right`). AKA Y offset origin.
       * Change this if your popper should grow in a direction different from `right`
       */
      y: 'right'
    },

    /**
     * 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.
     *
     * Note that if you disable this modifier, you must make sure the popper element
     * has its position set to `absolute` before Popper.js can do its work!
     *
     * Just disable this modifier and define your 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,
      /**
       * @deprecated since version 1.10.0, the property moved to `computeStyle` modifier
       * @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: undefined
    }
  };

  /**
   * The `dataObject` is an object containing all the information used by Popper.js.
   * This object is 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.arrowStyles Any CSS property defined here will be applied to the popper arrow. 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 overridden using the `options` argument of Popper.js.<br />
   * To override an option, simply pass an object with the same
   * structure of the `options` object, as the 3rd argument. For 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',

    /**
     * Set this to true if you want popper to position it self in 'fixed' mode
     * @prop {Boolean} positionFixed=false
     */
    positionFixed: false,

    /**
     * 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, it 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, it 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 () {
    /**
     * Creates a new Popper.js instance.
     * @class Popper
     * @param {Element|referenceObject} reference - The reference element used to position the popper
     * @param {Element} popper - The HTML / XML element used as the 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 && reference.jquery ? reference[0] : reference;
      this.popper = popper && popper.jquery ? popper[0] : popper;

      // 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$1(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);
      }

      /**
       * Schedules 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.
       * Due to the high instability of the methods contained in Utils, we can't
       * guarantee them to follow semver. Use them at your own risk!
       * @static
       * @private
       * @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;

  var SVGAnimatedString = function SVGAnimatedString() {};

  if (typeof window !== 'undefined') {
    SVGAnimatedString = window.SVGAnimatedString;
  }

  function convertToArray(value) {
    if (typeof value === 'string') {
      value = value.split(' ');
    }

    return value;
  }
  /**
   * Add classes to an element.
   * This method checks to ensure that the classes don't already exist before adding them.
   * It uses el.className rather than classList in order to be IE friendly.
   * @param {object} el - The element to add the classes to.
   * @param {classes} string - List of space separated classes to be added to the element.
   */

  function addClasses(el, classes) {
    var newClasses = convertToArray(classes);
    var classList;

    if (el.className instanceof SVGAnimatedString) {
      classList = convertToArray(el.className.baseVal);
    } else {
      classList = convertToArray(el.className);
    }

    newClasses.forEach(function (newClass) {
      if (classList.indexOf(newClass) === -1) {
        classList.push(newClass);
      }
    });

    if (el instanceof SVGElement) {
      el.setAttribute('class', classList.join(' '));
    } else {
      el.className = classList.join(' ');
    }
  }
  /**
   * Remove classes from an element.
   * It uses el.className rather than classList in order to be IE friendly.
   * @export
   * @param {any} el The element to remove the classes from.
   * @param {any} classes List of space separated classes to be removed from the element.
   */

  function removeClasses(el, classes) {
    var newClasses = convertToArray(classes);
    var classList;

    if (el.className instanceof SVGAnimatedString) {
      classList = convertToArray(el.className.baseVal);
    } else {
      classList = convertToArray(el.className);
    }

    newClasses.forEach(function (newClass) {
      var index = classList.indexOf(newClass);

      if (index !== -1) {
        classList.splice(index, 1);
      }
    });

    if (el instanceof SVGElement) {
      el.setAttribute('class', classList.join(' '));
    } else {
      el.className = classList.join(' ');
    }
  }
  var supportsPassive = false;

  if (typeof window !== 'undefined') {
    supportsPassive = false;

    try {
      var opts = Object.defineProperty({}, 'passive', {
        get: function get() {
          supportsPassive = true;
        }
      });
      window.addEventListener('test', null, opts);
    } catch (e) {}
  }

  /**
   * Removes all key-value entries from the list cache.
   *
   * @private
   * @name clear
   * @memberOf ListCache
   */
  function listCacheClear() {
    this.__data__ = [];
    this.size = 0;
  }

  var _listCacheClear = listCacheClear;

  /**
   * Performs a
   * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
   * comparison between two values to determine if they are equivalent.
   *
   * @static
   * @memberOf _
   * @since 4.0.0
   * @category Lang
   * @param {*} value The value to compare.
   * @param {*} other The other value to compare.
   * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
   * @example
   *
   * var object = { 'a': 1 };
   * var other = { 'a': 1 };
   *
   * _.eq(object, object);
   * // => true
   *
   * _.eq(object, other);
   * // => false
   *
   * _.eq('a', 'a');
   * // => true
   *
   * _.eq('a', Object('a'));
   * // => false
   *
   * _.eq(NaN, NaN);
   * // => true
   */
  function eq(value, other) {
    return value === other || (value !== value && other !== other);
  }

  var eq_1 = eq;

  /**
   * Gets the index at which the `key` is found in `array` of key-value pairs.
   *
   * @private
   * @param {Array} array The array to inspect.
   * @param {*} key The key to search for.
   * @returns {number} Returns the index of the matched value, else `-1`.
   */
  function assocIndexOf(array, key) {
    var length = array.length;
    while (length--) {
      if (eq_1(array[length][0], key)) {
        return length;
      }
    }
    return -1;
  }

  var _assocIndexOf = assocIndexOf;

  /** Used for built-in method references. */
  var arrayProto = Array.prototype;

  /** Built-in value references. */
  var splice = arrayProto.splice;

  /**
   * Removes `key` and its value from the list cache.
   *
   * @private
   * @name delete
   * @memberOf ListCache
   * @param {string} key The key of the value to remove.
   * @returns {boolean} Returns `true` if the entry was removed, else `false`.
   */
  function listCacheDelete(key) {
    var data = this.__data__,
        index = _assocIndexOf(data, key);

    if (index < 0) {
      return false;
    }
    var lastIndex = data.length - 1;
    if (index == lastIndex) {
      data.pop();
    } else {
      splice.call(data, index, 1);
    }
    --this.size;
    return true;
  }

  var _listCacheDelete = listCacheDelete;

  /**
   * Gets the list cache value for `key`.
   *
   * @private
   * @name get
   * @memberOf ListCache
   * @param {string} key The key of the value to get.
   * @returns {*} Returns the entry value.
   */
  function listCacheGet(key) {
    var data = this.__data__,
        index = _assocIndexOf(data, key);

    return index < 0 ? undefined : data[index][1];
  }

  var _listCacheGet = listCacheGet;

  /**
   * Checks if a list cache value for `key` exists.
   *
   * @private
   * @name has
   * @memberOf ListCache
   * @param {string} key The key of the entry to check.
   * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
   */
  function listCacheHas(key) {
    return _assocIndexOf(this.__data__, key) > -1;
  }

  var _listCacheHas = listCacheHas;

  /**
   * Sets the list cache `key` to `value`.
   *
   * @private
   * @name set
   * @memberOf ListCache
   * @param {string} key The key of the value to set.
   * @param {*} value The value to set.
   * @returns {Object} Returns the list cache instance.
   */
  function listCacheSet(key, value) {
    var data = this.__data__,
        index = _assocIndexOf(data, key);

    if (index < 0) {
      ++this.size;
      data.push([key, value]);
    } else {
      data[index][1] = value;
    }
    return this;
  }

  var _listCacheSet = listCacheSet;

  /**
   * Creates an list cache object.
   *
   * @private
   * @constructor
   * @param {Array} [entries] The key-value pairs to cache.
   */
  function ListCache(entries) {
    var index = -1,
        length = entries == null ? 0 : entries.length;

    this.clear();
    while (++index < length) {
      var entry = entries[index];
      this.set(entry[0], entry[1]);
    }
  }

  // Add methods to `ListCache`.
  ListCache.prototype.clear = _listCacheClear;
  ListCache.prototype['delete'] = _listCacheDelete;
  ListCache.prototype.get = _listCacheGet;
  ListCache.prototype.has = _listCacheHas;
  ListCache.prototype.set = _listCacheSet;

  var _ListCache = ListCache;

  /**
   * Removes all key-value entries from the stack.
   *
   * @private
   * @name clear
   * @memberOf Stack
   */
  function stackClear() {
    this.__data__ = new _ListCache;
    this.size = 0;
  }

  var _stackClear = stackClear;

  /**
   * Removes `key` and its value from the stack.
   *
   * @private
   * @name delete
   * @memberOf Stack
   * @param {string} key The key of the value to remove.
   * @returns {boolean} Returns `true` if the entry was removed, else `false`.
   */
  function stackDelete(key) {
    var data = this.__data__,
        result = data['delete'](key);

    this.size = data.size;
    return result;
  }

  var _stackDelete = stackDelete;

  /**
   * Gets the stack value for `key`.
   *
   * @private
   * @name get
   * @memberOf Stack
   * @param {string} key The key of the value to get.
   * @returns {*} Returns the entry value.
   */
  function stackGet(key) {
    return this.__data__.get(key);
  }

  var _stackGet = stackGet;

  /**
   * Checks if a stack value for `key` exists.
   *
   * @private
   * @name has
   * @memberOf Stack
   * @param {string} key The key of the entry to check.
   * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
   */
  function stackHas(key) {
    return this.__data__.has(key);
  }

  var _stackHas = stackHas;

  var commonjsGlobal = typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};

  function createCommonjsModule(fn, basedir, module) {
  	return module = {
  		path: basedir,
  		exports: {},
  		require: function (path, base) {
  			return commonjsRequire(path, (base === undefined || base === null) ? module.path : base);
  		}
  	}, fn(module, module.exports), module.exports;
  }

  function commonjsRequire () {
  	throw new Error('Dynamic requires are not currently supported by @rollup/plugin-commonjs');
  }

  /** Detect free variable `global` from Node.js. */
  var freeGlobal = typeof commonjsGlobal == 'object' && commonjsGlobal && commonjsGlobal.Object === Object && commonjsGlobal;

  var _freeGlobal = freeGlobal;

  /** Detect free variable `self`. */
  var freeSelf = typeof self == 'object' && self && self.Object === Object && self;

  /** Used as a reference to the global object. */
  var root = _freeGlobal || freeSelf || Function('return this')();

  var _root = root;

  /** Built-in value references. */
  var Symbol$1 = _root.Symbol;

  var _Symbol = Symbol$1;

  /** Used for built-in method references. */
  var objectProto$e = Object.prototype;

  /** Used to check objects for own properties. */
  var hasOwnProperty$b = objectProto$e.hasOwnProperty;

  /**
   * Used to resolve the
   * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
   * of values.
   */
  var nativeObjectToString$1 = objectProto$e.toString;

  /** Built-in value references. */
  var symToStringTag$1 = _Symbol ? _Symbol.toStringTag : undefined;

  /**
   * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.
   *
   * @private
   * @param {*} value The value to query.
   * @returns {string} Returns the raw `toStringTag`.
   */
  function getRawTag(value) {
    var isOwn = hasOwnProperty$b.call(value, symToStringTag$1),
        tag = value[symToStringTag$1];

    try {
      value[symToStringTag$1] = undefined;
      var unmasked = true;
    } catch (e) {}

    var result = nativeObjectToString$1.call(value);
    if (unmasked) {
      if (isOwn) {
        value[symToStringTag$1] = tag;
      } else {
        delete value[symToStringTag$1];
      }
    }
    return result;
  }

  var _getRawTag = getRawTag;

  /** Used for built-in method references. */
  var objectProto$d = Object.prototype;

  /**
   * Used to resolve the
   * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
   * of values.
   */
  var nativeObjectToString = objectProto$d.toString;

  /**
   * Converts `value` to a string using `Object.prototype.toString`.
   *
   * @private
   * @param {*} value The value to convert.
   * @returns {string} Returns the converted string.
   */
  function objectToString(value) {
    return nativeObjectToString.call(value);
  }

  var _objectToString = objectToString;

  /** `Object#toString` result references. */
  var nullTag = '[object Null]',
      undefinedTag = '[object Undefined]';

  /** Built-in value references. */
  var symToStringTag = _Symbol ? _Symbol.toStringTag : undefined;

  /**
   * The base implementation of `getTag` without fallbacks for buggy environments.
   *
   * @private
   * @param {*} value The value to query.
   * @returns {string} Returns the `toStringTag`.
   */
  function baseGetTag(value) {
    if (value == null) {
      return value === undefined ? undefinedTag : nullTag;
    }
    return (symToStringTag && symToStringTag in Object(value))
      ? _getRawTag(value)
      : _objectToString(value);
  }

  var _baseGetTag = baseGetTag;

  /**
   * Checks if `value` is the
   * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
   * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
   *
   * @static
   * @memberOf _
   * @since 0.1.0
   * @category Lang
   * @param {*} value The value to check.
   * @returns {boolean} Returns `true` if `value` is an object, else `false`.
   * @example
   *
   * _.isObject({});
   * // => true
   *
   * _.isObject([1, 2, 3]);
   * // => true
   *
   * _.isObject(_.noop);
   * // => true
   *
   * _.isObject(null);
   * // => false
   */
  function isObject(value) {
    var type = typeof value;
    return value != null && (type == 'object' || type == 'function');
  }

  var isObject_1 = isObject;

  /** `Object#toString` result references. */
  var asyncTag = '[object AsyncFunction]',
      funcTag$1 = '[object Function]',
      genTag = '[object GeneratorFunction]',
      proxyTag = '[object Proxy]';

  /**
   * Checks if `value` is classified as a `Function` object.
   *
   * @static
   * @memberOf _
   * @since 0.1.0
   * @category Lang
   * @param {*} value The value to check.
   * @returns {boolean} Returns `true` if `value` is a function, else `false`.
   * @example
   *
   * _.isFunction(_);
   * // => true
   *
   * _.isFunction(/abc/);
   * // => false
   */
  function isFunction(value) {
    if (!isObject_1(value)) {
      return false;
    }
    // The use of `Object#toString` avoids issues with the `typeof` operator
    // in Safari 9 which returns 'object' for typed arrays and other constructors.
    var tag = _baseGetTag(value);
    return tag == funcTag$1 || tag == genTag || tag == asyncTag || tag == proxyTag;
  }

  var isFunction_1 = isFunction;

  /** Used to detect overreaching core-js shims. */
  var coreJsData = _root['__core-js_shared__'];

  var _coreJsData = coreJsData;

  /** Used to detect methods masquerading as native. */
  var maskSrcKey = (function() {
    var uid = /[^.]+$/.exec(_coreJsData && _coreJsData.keys && _coreJsData.keys.IE_PROTO || '');
    return uid ? ('Symbol(src)_1.' + uid) : '';
  }());

  /**
   * Checks if `func` has its source masked.
   *
   * @private
   * @param {Function} func The function to check.
   * @returns {boolean} Returns `true` if `func` is masked, else `false`.
   */
  function isMasked(func) {
    return !!maskSrcKey && (maskSrcKey in func);
  }

  var _isMasked = isMasked;

  /** Used for built-in method references. */
  var funcProto$2 = Function.prototype;

  /** Used to resolve the decompiled source of functions. */
  var funcToString$2 = funcProto$2.toString;

  /**
   * Converts `func` to its source code.
   *
   * @private
   * @param {Function} func The function to convert.
   * @returns {string} Returns the source code.
   */
  function toSource(func) {
    if (func != null) {
      try {
        return funcToString$2.call(func);
      } catch (e) {}
      try {
        return (func + '');
      } catch (e) {}
    }
    return '';
  }

  var _toSource = toSource;

  /**
   * Used to match `RegExp`
   * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).
   */
  var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;

  /** Used to detect host constructors (Safari). */
  var reIsHostCtor = /^\[object .+?Constructor\]$/;

  /** Used for built-in method references. */
  var funcProto$1 = Function.prototype,
      objectProto$c = Object.prototype;

  /** Used to resolve the decompiled source of functions. */
  var funcToString$1 = funcProto$1.toString;

  /** Used to check objects for own properties. */
  var hasOwnProperty$a = objectProto$c.hasOwnProperty;

  /** Used to detect if a method is native. */
  var reIsNative = RegExp('^' +
    funcToString$1.call(hasOwnProperty$a).replace(reRegExpChar, '\\$&')
    .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
  );

  /**
   * The base implementation of `_.isNative` without bad shim checks.
   *
   * @private
   * @param {*} value The value to check.
   * @returns {boolean} Returns `true` if `value` is a native function,
   *  else `false`.
   */
  function baseIsNative(value) {
    if (!isObject_1(value) || _isMasked(value)) {
      return false;
    }
    var pattern = isFunction_1(value) ? reIsNative : reIsHostCtor;
    return pattern.test(_toSource(value));
  }

  var _baseIsNative = baseIsNative;

  /**
   * Gets the value at `key` of `object`.
   *
   * @private
   * @param {Object} [object] The object to query.
   * @param {string} key The key of the property to get.
   * @returns {*} Returns the property value.
   */
  function getValue(object, key) {
    return object == null ? undefined : object[key];
  }

  var _getValue = getValue;

  /**
   * Gets the native function at `key` of `object`.
   *
   * @private
   * @param {Object} object The object to query.
   * @param {string} key The key of the method to get.
   * @returns {*} Returns the function if it's native, else `undefined`.
   */
  function getNative(object, key) {
    var value = _getValue(object, key);
    return _baseIsNative(value) ? value : undefined;
  }

  var _getNative = getNative;

  /* Built-in method references that are verified to be native. */
  var Map = _getNative(_root, 'Map');

  var _Map = Map;

  /* Built-in method references that are verified to be native. */
  var nativeCreate = _getNative(Object, 'create');

  var _nativeCreate = nativeCreate;

  /**
   * Removes all key-value entries from the hash.
   *
   * @private
   * @name clear
   * @memberOf Hash
   */
  function hashClear() {
    this.__data__ = _nativeCreate ? _nativeCreate(null) : {};
    this.size = 0;
  }

  var _hashClear = hashClear;

  /**
   * Removes `key` and its value from the hash.
   *
   * @private
   * @name delete
   * @memberOf Hash
   * @param {Object} hash The hash to modify.
   * @param {string} key The key of the value to remove.
   * @returns {boolean} Returns `true` if the entry was removed, else `false`.
   */
  function hashDelete(key) {
    var result = this.has(key) && delete this.__data__[key];
    this.size -= result ? 1 : 0;
    return result;
  }

  var _hashDelete = hashDelete;

  /** Used to stand-in for `undefined` hash values. */
  var HASH_UNDEFINED$2 = '__lodash_hash_undefined__';

  /** Used for built-in method references. */
  var objectProto$b = Object.prototype;

  /** Used to check objects for own properties. */
  var hasOwnProperty$9 = objectProto$b.hasOwnProperty;

  /**
   * Gets the hash value for `key`.
   *
   * @private
   * @name get
   * @memberOf Hash
   * @param {string} key The key of the value to get.
   * @returns {*} Returns the entry value.
   */
  function hashGet(key) {
    var data = this.__data__;
    if (_nativeCreate) {
      var result = data[key];
      return result === HASH_UNDEFINED$2 ? undefined : result;
    }
    return hasOwnProperty$9.call(data, key) ? data[key] : undefined;
  }

  var _hashGet = hashGet;

  /** Used for built-in method references. */
  var objectProto$a = Object.prototype;

  /** Used to check objects for own properties. */
  var hasOwnProperty$8 = objectProto$a.hasOwnProperty;

  /**
   * Checks if a hash value for `key` exists.
   *
   * @private
   * @name has
   * @memberOf Hash
   * @param {string} key The key of the entry to check.
   * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
   */
  function hashHas(key) {
    var data = this.__data__;
    return _nativeCreate ? (data[key] !== undefined) : hasOwnProperty$8.call(data, key);
  }

  var _hashHas = hashHas;

  /** Used to stand-in for `undefined` hash values. */
  var HASH_UNDEFINED$1 = '__lodash_hash_undefined__';

  /**
   * Sets the hash `key` to `value`.
   *
   * @private
   * @name set
   * @memberOf Hash
   * @param {string} key The key of the value to set.
   * @param {*} value The value to set.
   * @returns {Object} Returns the hash instance.
   */
  function hashSet(key, value) {
    var data = this.__data__;
    this.size += this.has(key) ? 0 : 1;
    data[key] = (_nativeCreate && value === undefined) ? HASH_UNDEFINED$1 : value;
    return this;
  }

  var _hashSet = hashSet;

  /**
   * Creates a hash object.
   *
   * @private
   * @constructor
   * @param {Array} [entries] The key-value pairs to cache.
   */
  function Hash(entries) {
    var index = -1,
        length = entries == null ? 0 : entries.length;

    this.clear();
    while (++index < length) {
      var entry = entries[index];
      this.set(entry[0], entry[1]);
    }
  }

  // Add methods to `Hash`.
  Hash.prototype.clear = _hashClear;
  Hash.prototype['delete'] = _hashDelete;
  Hash.prototype.get = _hashGet;
  Hash.prototype.has = _hashHas;
  Hash.prototype.set = _hashSet;

  var _Hash = Hash;

  /**
   * Removes all key-value entries from the map.
   *
   * @private
   * @name clear
   * @memberOf MapCache
   */
  function mapCacheClear() {
    this.size = 0;
    this.__data__ = {
      'hash': new _Hash,
      'map': new (_Map || _ListCache),
      'string': new _Hash
    };
  }

  var _mapCacheClear = mapCacheClear;

  /**
   * Checks if `value` is suitable for use as unique object key.
   *
   * @private
   * @param {*} value The value to check.
   * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
   */
  function isKeyable(value) {
    var type = typeof value;
    return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
      ? (value !== '__proto__')
      : (value === null);
  }

  var _isKeyable = isKeyable;

  /**
   * Gets the data for `map`.
   *
   * @private
   * @param {Object} map The map to query.
   * @param {string} key The reference key.
   * @returns {*} Returns the map data.
   */
  function getMapData(map, key) {
    var data = map.__data__;
    return _isKeyable(key)
      ? data[typeof key == 'string' ? 'string' : 'hash']
      : data.map;
  }

  var _getMapData = getMapData;

  /**
   * Removes `key` and its value from the map.
   *
   * @private
   * @name delete
   * @memberOf MapCache
   * @param {string} key The key of the value to remove.
   * @returns {boolean} Returns `true` if the entry was removed, else `false`.
   */
  function mapCacheDelete(key) {
    var result = _getMapData(this, key)['delete'](key);
    this.size -= result ? 1 : 0;
    return result;
  }

  var _mapCacheDelete = mapCacheDelete;

  /**
   * Gets the map value for `key`.
   *
   * @private
   * @name get
   * @memberOf MapCache
   * @param {string} key The key of the value to get.
   * @returns {*} Returns the entry value.
   */
  function mapCacheGet(key) {
    return _getMapData(this, key).get(key);
  }

  var _mapCacheGet = mapCacheGet;

  /**
   * Checks if a map value for `key` exists.
   *
   * @private
   * @name has
   * @memberOf MapCache
   * @param {string} key The key of the entry to check.
   * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
   */
  function mapCacheHas(key) {
    return _getMapData(this, key).has(key);
  }

  var _mapCacheHas = mapCacheHas;

  /**
   * Sets the map `key` to `value`.
   *
   * @private
   * @name set
   * @memberOf MapCache
   * @param {string} key The key of the value to set.
   * @param {*} value The value to set.
   * @returns {Object} Returns the map cache instance.
   */
  function mapCacheSet(key, value) {
    var data = _getMapData(this, key),
        size = data.size;

    data.set(key, value);
    this.size += data.size == size ? 0 : 1;
    return this;
  }

  var _mapCacheSet = mapCacheSet;

  /**
   * Creates a map cache object to store key-value pairs.
   *
   * @private
   * @constructor
   * @param {Array} [entries] The key-value pairs to cache.
   */
  function MapCache(entries) {
    var index = -1,
        length = entries == null ? 0 : entries.length;

    this.clear();
    while (++index < length) {
      var entry = entries[index];
      this.set(entry[0], entry[1]);
    }
  }

  // Add methods to `MapCache`.
  MapCache.prototype.clear = _mapCacheClear;
  MapCache.prototype['delete'] = _mapCacheDelete;
  MapCache.prototype.get = _mapCacheGet;
  MapCache.prototype.has = _mapCacheHas;
  MapCache.prototype.set = _mapCacheSet;

  var _MapCache = MapCache;

  /** Used as the size to enable large array optimizations. */
  var LARGE_ARRAY_SIZE = 200;

  /**
   * Sets the stack `key` to `value`.
   *
   * @private
   * @name set
   * @memberOf Stack
   * @param {string} key The key of the value to set.
   * @param {*} value The value to set.
   * @returns {Object} Returns the stack cache instance.
   */
  function stackSet(key, value) {
    var data = this.__data__;
    if (data instanceof _ListCache) {
      var pairs = data.__data__;
      if (!_Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
        pairs.push([key, value]);
        this.size = ++data.size;
        return this;
      }
      data = this.__data__ = new _MapCache(pairs);
    }
    data.set(key, value);
    this.size = data.size;
    return this;
  }

  var _stackSet = stackSet;

  /**
   * Creates a stack cache object to store key-value pairs.
   *
   * @private
   * @constructor
   * @param {Array} [entries] The key-value pairs to cache.
   */
  function Stack(entries) {
    var data = this.__data__ = new _ListCache(entries);
    this.size = data.size;
  }

  // Add methods to `Stack`.
  Stack.prototype.clear = _stackClear;
  Stack.prototype['delete'] = _stackDelete;
  Stack.prototype.get = _stackGet;
  Stack.prototype.has = _stackHas;
  Stack.prototype.set = _stackSet;

  var _Stack = Stack;

  /** Used to stand-in for `undefined` hash values. */
  var HASH_UNDEFINED = '__lodash_hash_undefined__';

  /**
   * Adds `value` to the array cache.
   *
   * @private
   * @name add
   * @memberOf SetCache
   * @alias push
   * @param {*} value The value to cache.
   * @returns {Object} Returns the cache instance.
   */
  function setCacheAdd(value) {
    this.__data__.set(value, HASH_UNDEFINED);
    return this;
  }

  var _setCacheAdd = setCacheAdd;

  /**
   * Checks if `value` is in the array cache.
   *
   * @private
   * @name has
   * @memberOf SetCache
   * @param {*} value The value to search for.
   * @returns {number} Returns `true` if `value` is found, else `false`.
   */
  function setCacheHas(value) {
    return this.__data__.has(value);
  }

  var _setCacheHas = setCacheHas;

  /**
   *
   * Creates an array cache object to store unique values.
   *
   * @private
   * @constructor
   * @param {Array} [values] The values to cache.
   */
  function SetCache(values) {
    var index = -1,
        length = values == null ? 0 : values.length;

    this.__data__ = new _MapCache;
    while (++index < length) {
      this.add(values[index]);
    }
  }

  // Add methods to `SetCache`.
  SetCache.prototype.add = SetCache.prototype.push = _setCacheAdd;
  SetCache.prototype.has = _setCacheHas;

  var _SetCache = SetCache;

  /**
   * A specialized version of `_.some` for arrays without support for iteratee
   * shorthands.
   *
   * @private
   * @param {Array} [array] The array to iterate over.
   * @param {Function} predicate The function invoked per iteration.
   * @returns {boolean} Returns `true` if any element passes the predicate check,
   *  else `false`.
   */
  function arraySome(array, predicate) {
    var index = -1,
        length = array == null ? 0 : array.length;

    while (++index < length) {
      if (predicate(array[index], index, array)) {
        return true;
      }
    }
    return false;
  }

  var _arraySome = arraySome;

  /**
   * Checks if a `cache` value for `key` exists.
   *
   * @private
   * @param {Object} cache The cache to query.
   * @param {string} key The key of the entry to check.
   * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
   */
  function cacheHas(cache, key) {
    return cache.has(key);
  }

  var _cacheHas = cacheHas;

  /** Used to compose bitmasks for value comparisons. */
  var COMPARE_PARTIAL_FLAG$3 = 1,
      COMPARE_UNORDERED_FLAG$1 = 2;

  /**
   * A specialized version of `baseIsEqualDeep` for arrays with support for
   * partial deep comparisons.
   *
   * @private
   * @param {Array} array The array to compare.
   * @param {Array} other The other array to compare.
   * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
   * @param {Function} customizer The function to customize comparisons.
   * @param {Function} equalFunc The function to determine equivalents of values.
   * @param {Object} stack Tracks traversed `array` and `other` objects.
   * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
   */
  function equalArrays(array, other, bitmask, customizer, equalFunc, stack) {
    var isPartial = bitmask & COMPARE_PARTIAL_FLAG$3,
        arrLength = array.length,
        othLength = other.length;

    if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
      return false;
    }
    // Check that cyclic values are equal.
    var arrStacked = stack.get(array);
    var othStacked = stack.get(other);
    if (arrStacked && othStacked) {
      return arrStacked == other && othStacked == array;
    }
    var index = -1,
        result = true,
        seen = (bitmask & COMPARE_UNORDERED_FLAG$1) ? new _SetCache : undefined;

    stack.set(array, other);
    stack.set(other, array);

    // Ignore non-index properties.
    while (++index < arrLength) {
      var arrValue = array[index],
          othValue = other[index];

      if (customizer) {
        var compared = isPartial
          ? customizer(othValue, arrValue, index, other, array, stack)
          : customizer(arrValue, othValue, index, array, other, stack);
      }
      if (compared !== undefined) {
        if (compared) {
          continue;
        }
        result = false;
        break;
      }
      // Recursively compare arrays (susceptible to call stack limits).
      if (seen) {
        if (!_arraySome(other, function(othValue, othIndex) {
              if (!_cacheHas(seen, othIndex) &&
                  (arrValue === othValue || equalFunc(arrValue, othValue, bitmask, customizer, stack))) {
                return seen.push(othIndex);
              }
            })) {
          result = false;
          break;
        }
      } else if (!(
            arrValue === othValue ||
              equalFunc(arrValue, othValue, bitmask, customizer, stack)
          )) {
        result = false;
        break;
      }
    }
    stack['delete'](array);
    stack['delete'](other);
    return result;
  }

  var _equalArrays = equalArrays;

  /** Built-in value references. */
  var Uint8Array = _root.Uint8Array;

  var _Uint8Array = Uint8Array;

  /**
   * Converts `map` to its key-value pairs.
   *
   * @private
   * @param {Object} map The map to convert.
   * @returns {Array} Returns the key-value pairs.
   */
  function mapToArray(map) {
    var index = -1,
        result = Array(map.size);

    map.forEach(function(value, key) {
      result[++index] = [key, value];
    });
    return result;
  }

  var _mapToArray = mapToArray;

  /**
   * Converts `set` to an array of its values.
   *
   * @private
   * @param {Object} set The set to convert.
   * @returns {Array} Returns the values.
   */
  function setToArray(set) {
    var index = -1,
        result = Array(set.size);

    set.forEach(function(value) {
      result[++index] = value;
    });
    return result;
  }

  var _setToArray = setToArray;

  /** Used to compose bitmasks for value comparisons. */
  var COMPARE_PARTIAL_FLAG$2 = 1,
      COMPARE_UNORDERED_FLAG = 2;

  /** `Object#toString` result references. */
  var boolTag$1 = '[object Boolean]',
      dateTag$1 = '[object Date]',
      errorTag$1 = '[object Error]',
      mapTag$2 = '[object Map]',
      numberTag$1 = '[object Number]',
      regexpTag$1 = '[object RegExp]',
      setTag$2 = '[object Set]',
      stringTag$1 = '[object String]',
      symbolTag = '[object Symbol]';

  var arrayBufferTag$1 = '[object ArrayBuffer]',
      dataViewTag$2 = '[object DataView]';

  /** Used to convert symbols to primitives and strings. */
  var symbolProto = _Symbol ? _Symbol.prototype : undefined,
      symbolValueOf = symbolProto ? symbolProto.valueOf : undefined;

  /**
   * A specialized version of `baseIsEqualDeep` for comparing objects of
   * the same `toStringTag`.
   *
   * **Note:** This function only supports comparing values with tags of
   * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
   *
   * @private
   * @param {Object} object The object to compare.
   * @param {Object} other The other object to compare.
   * @param {string} tag The `toStringTag` of the objects to compare.
   * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
   * @param {Function} customizer The function to customize comparisons.
   * @param {Function} equalFunc The function to determine equivalents of values.
   * @param {Object} stack Tracks traversed `object` and `other` objects.
   * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
   */
  function equalByTag(object, other, tag, bitmask, customizer, equalFunc, stack) {
    switch (tag) {
      case dataViewTag$2:
        if ((object.byteLength != other.byteLength) ||
            (object.byteOffset != other.byteOffset)) {
          return false;
        }
        object = object.buffer;
        other = other.buffer;

      case arrayBufferTag$1:
        if ((object.byteLength != other.byteLength) ||
            !equalFunc(new _Uint8Array(object), new _Uint8Array(other))) {
          return false;
        }
        return true;

      case boolTag$1:
      case dateTag$1:
      case numberTag$1:
        // Coerce booleans to `1` or `0` and dates to milliseconds.
        // Invalid dates are coerced to `NaN`.
        return eq_1(+object, +other);

      case errorTag$1:
        return object.name == other.name && object.message == other.message;

      case regexpTag$1:
      case stringTag$1:
        // Coerce regexes to strings and treat strings, primitives and objects,
        // as equal. See http://www.ecma-international.org/ecma-262/7.0/#sec-regexp.prototype.tostring
        // for more details.
        return object == (other + '');

      case mapTag$2:
        var convert = _mapToArray;

      case setTag$2:
        var isPartial = bitmask & COMPARE_PARTIAL_FLAG$2;
        convert || (convert = _setToArray);

        if (object.size != other.size && !isPartial) {
          return false;
        }
        // Assume cyclic values are equal.
        var stacked = stack.get(object);
        if (stacked) {
          return stacked == other;
        }
        bitmask |= COMPARE_UNORDERED_FLAG;

        // Recursively compare objects (susceptible to call stack limits).
        stack.set(object, other);
        var result = _equalArrays(convert(object), convert(other), bitmask, customizer, equalFunc, stack);
        stack['delete'](object);
        return result;

      case symbolTag:
        if (symbolValueOf) {
          return symbolValueOf.call(object) == symbolValueOf.call(other);
        }
    }
    return false;
  }

  var _equalByTag = equalByTag;

  /**
   * Appends the elements of `values` to `array`.
   *
   * @private
   * @param {Array} array The array to modify.
   * @param {Array} values The values to append.
   * @returns {Array} Returns `array`.
   */
  function arrayPush(array, values) {
    var index = -1,
        length = values.length,
        offset = array.length;

    while (++index < length) {
      array[offset + index] = values[index];
    }
    return array;
  }

  var _arrayPush = arrayPush;

  /**
   * Checks if `value` is classified as an `Array` object.
   *
   * @static
   * @memberOf _
   * @since 0.1.0
   * @category Lang
   * @param {*} value The value to check.
   * @returns {boolean} Returns `true` if `value` is an array, else `false`.
   * @example
   *
   * _.isArray([1, 2, 3]);
   * // => true
   *
   * _.isArray(document.body.children);
   * // => false
   *
   * _.isArray('abc');
   * // => false
   *
   * _.isArray(_.noop);
   * // => false
   */
  var isArray = Array.isArray;

  var isArray_1 = isArray;

  /**
   * The base implementation of `getAllKeys` and `getAllKeysIn` which uses
   * `keysFunc` and `symbolsFunc` to get the enumerable property names and
   * symbols of `object`.
   *
   * @private
   * @param {Object} object The object to query.
   * @param {Function} keysFunc The function to get the keys of `object`.
   * @param {Function} symbolsFunc The function to get the symbols of `object`.
   * @returns {Array} Returns the array of property names and symbols.
   */
  function baseGetAllKeys(object, keysFunc, symbolsFunc) {
    var result = keysFunc(object);
    return isArray_1(object) ? result : _arrayPush(result, symbolsFunc(object));
  }

  var _baseGetAllKeys = baseGetAllKeys;

  /**
   * A specialized version of `_.filter` for arrays without support for
   * iteratee shorthands.
   *
   * @private
   * @param {Array} [array] The array to iterate over.
   * @param {Function} predicate The function invoked per iteration.
   * @returns {Array} Returns the new filtered array.
   */
  function arrayFilter(array, predicate) {
    var index = -1,
        length = array == null ? 0 : array.length,
        resIndex = 0,
        result = [];

    while (++index < length) {
      var value = array[index];
      if (predicate(value, index, array)) {
        result[resIndex++] = value;
      }
    }
    return result;
  }

  var _arrayFilter = arrayFilter;

  /**
   * This method returns a new empty array.
   *
   * @static
   * @memberOf _
   * @since 4.13.0
   * @category Util
   * @returns {Array} Returns the new empty array.
   * @example
   *
   * var arrays = _.times(2, _.stubArray);
   *
   * console.log(arrays);
   * // => [[], []]
   *
   * console.log(arrays[0] === arrays[1]);
   * // => false
   */
  function stubArray() {
    return [];
  }

  var stubArray_1 = stubArray;

  /** Used for built-in method references. */
  var objectProto$9 = Object.prototype;

  /** Built-in value references. */
  var propertyIsEnumerable$1 = objectProto$9.propertyIsEnumerable;

  /* Built-in method references for those with the same name as other `lodash` methods. */
  var nativeGetSymbols = Object.getOwnPropertySymbols;

  /**
   * Creates an array of the own enumerable symbols of `object`.
   *
   * @private
   * @param {Object} object The object to query.
   * @returns {Array} Returns the array of symbols.
   */
  var getSymbols = !nativeGetSymbols ? stubArray_1 : function(object) {
    if (object == null) {
      return [];
    }
    object = Object(object);
    return _arrayFilter(nativeGetSymbols(object), function(symbol) {
      return propertyIsEnumerable$1.call(object, symbol);
    });
  };

  var _getSymbols = getSymbols;

  /**
   * The base implementation of `_.times` without support for iteratee shorthands
   * or max array length checks.
   *
   * @private
   * @param {number} n The number of times to invoke `iteratee`.
   * @param {Function} iteratee The function invoked per iteration.
   * @returns {Array} Returns the array of results.
   */
  function baseTimes(n, iteratee) {
    var index = -1,
        result = Array(n);

    while (++index < n) {
      result[index] = iteratee(index);
    }
    return result;
  }

  var _baseTimes = baseTimes;

  /**
   * Checks if `value` is object-like. A value is object-like if it's not `null`
   * and has a `typeof` result of "object".
   *
   * @static
   * @memberOf _
   * @since 4.0.0
   * @category Lang
   * @param {*} value The value to check.
   * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
   * @example
   *
   * _.isObjectLike({});
   * // => true
   *
   * _.isObjectLike([1, 2, 3]);
   * // => true
   *
   * _.isObjectLike(_.noop);
   * // => false
   *
   * _.isObjectLike(null);
   * // => false
   */
  function isObjectLike(value) {
    return value != null && typeof value == 'object';
  }

  var isObjectLike_1 = isObjectLike;

  /** `Object#toString` result references. */
  var argsTag$2 = '[object Arguments]';

  /**
   * The base implementation of `_.isArguments`.
   *
   * @private
   * @param {*} value The value to check.
   * @returns {boolean} Returns `true` if `value` is an `arguments` object,
   */
  function baseIsArguments(value) {
    return isObjectLike_1(value) && _baseGetTag(value) == argsTag$2;
  }

  var _baseIsArguments = baseIsArguments;

  /** Used for built-in method references. */
  var objectProto$8 = Object.prototype;

  /** Used to check objects for own properties. */
  var hasOwnProperty$7 = objectProto$8.hasOwnProperty;

  /** Built-in value references. */
  var propertyIsEnumerable = objectProto$8.propertyIsEnumerable;

  /**
   * Checks if `value` is likely an `arguments` object.
   *
   * @static
   * @memberOf _
   * @since 0.1.0
   * @category Lang
   * @param {*} value The value to check.
   * @returns {boolean} Returns `true` if `value` is an `arguments` object,
   *  else `false`.
   * @example
   *
   * _.isArguments(function() { return arguments; }());
   * // => true
   *
   * _.isArguments([1, 2, 3]);
   * // => false
   */
  var isArguments = _baseIsArguments(function() { return arguments; }()) ? _baseIsArguments : function(value) {
    return isObjectLike_1(value) && hasOwnProperty$7.call(value, 'callee') &&
      !propertyIsEnumerable.call(value, 'callee');
  };

  var isArguments_1 = isArguments;

  /**
   * This method returns `false`.
   *
   * @static
   * @memberOf _
   * @since 4.13.0
   * @category Util
   * @returns {boolean} Returns `false`.
   * @example
   *
   * _.times(2, _.stubFalse);
   * // => [false, false]
   */
  function stubFalse() {
    return false;
  }

  var stubFalse_1 = stubFalse;

  var isBuffer_1 = createCommonjsModule(function (module, exports) {
  /** Detect free variable `exports`. */
  var freeExports = exports && !exports.nodeType && exports;

  /** Detect free variable `module`. */
  var freeModule = freeExports && 'object' == 'object' && module && !module.nodeType && module;

  /** Detect the popular CommonJS extension `module.exports`. */
  var moduleExports = freeModule && freeModule.exports === freeExports;

  /** Built-in value references. */
  var Buffer = moduleExports ? _root.Buffer : undefined;

  /* Built-in method references for those with the same name as other `lodash` methods. */
  var nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined;

  /**
   * Checks if `value` is a buffer.
   *
   * @static
   * @memberOf _
   * @since 4.3.0
   * @category Lang
   * @param {*} value The value to check.
   * @returns {boolean} Returns `true` if `value` is a buffer, else `false`.
   * @example
   *
   * _.isBuffer(new Buffer(2));
   * // => true
   *
   * _.isBuffer(new Uint8Array(2));
   * // => false
   */
  var isBuffer = nativeIsBuffer || stubFalse_1;

  module.exports = isBuffer;
  });

  /** Used as references for various `Number` constants. */
  var MAX_SAFE_INTEGER$1 = 9007199254740991;

  /** Used to detect unsigned integer values. */
  var reIsUint = /^(?:0|[1-9]\d*)$/;

  /**
   * Checks if `value` is a valid array-like index.
   *
   * @private
   * @param {*} value The value to check.
   * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
   * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
   */
  function isIndex(value, length) {
    var type = typeof value;
    length = length == null ? MAX_SAFE_INTEGER$1 : length;

    return !!length &&
      (type == 'number' ||
        (type != 'symbol' && reIsUint.test(value))) &&
          (value > -1 && value % 1 == 0 && value < length);
  }

  var _isIndex = isIndex;

  /** Used as references for various `Number` constants. */
  var MAX_SAFE_INTEGER = 9007199254740991;

  /**
   * Checks if `value` is a valid array-like length.
   *
   * **Note:** This method is loosely based on
   * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
   *
   * @static
   * @memberOf _
   * @since 4.0.0
   * @category Lang
   * @param {*} value The value to check.
   * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
   * @example
   *
   * _.isLength(3);
   * // => true
   *
   * _.isLength(Number.MIN_VALUE);
   * // => false
   *
   * _.isLength(Infinity);
   * // => false
   *
   * _.isLength('3');
   * // => false
   */
  function isLength(value) {
    return typeof value == 'number' &&
      value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
  }

  var isLength_1 = isLength;

  /** `Object#toString` result references. */
  var argsTag$1 = '[object Arguments]',
      arrayTag$1 = '[object Array]',
      boolTag = '[object Boolean]',
      dateTag = '[object Date]',
      errorTag = '[object Error]',
      funcTag = '[object Function]',
      mapTag$1 = '[object Map]',
      numberTag = '[object Number]',
      objectTag$3 = '[object Object]',
      regexpTag = '[object RegExp]',
      setTag$1 = '[object Set]',
      stringTag = '[object String]',
      weakMapTag$1 = '[object WeakMap]';

  var arrayBufferTag = '[object ArrayBuffer]',
      dataViewTag$1 = '[object DataView]',
      float32Tag = '[object Float32Array]',
      float64Tag = '[object Float64Array]',
      int8Tag = '[object Int8Array]',
      int16Tag = '[object Int16Array]',
      int32Tag = '[object Int32Array]',
      uint8Tag = '[object Uint8Array]',
      uint8ClampedTag = '[object Uint8ClampedArray]',
      uint16Tag = '[object Uint16Array]',
      uint32Tag = '[object Uint32Array]';

  /** Used to identify `toStringTag` values of typed arrays. */
  var typedArrayTags = {};
  typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
  typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
  typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
  typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
  typedArrayTags[uint32Tag] = true;
  typedArrayTags[argsTag$1] = typedArrayTags[arrayTag$1] =
  typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
  typedArrayTags[dataViewTag$1] = typedArrayTags[dateTag] =
  typedArrayTags[errorTag] = typedArrayTags[funcTag] =
  typedArrayTags[mapTag$1] = typedArrayTags[numberTag] =
  typedArrayTags[objectTag$3] = typedArrayTags[regexpTag] =
  typedArrayTags[setTag$1] = typedArrayTags[stringTag] =
  typedArrayTags[weakMapTag$1] = false;

  /**
   * The base implementation of `_.isTypedArray` without Node.js optimizations.
   *
   * @private
   * @param {*} value The value to check.
   * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
   */
  function baseIsTypedArray(value) {
    return isObjectLike_1(value) &&
      isLength_1(value.length) && !!typedArrayTags[_baseGetTag(value)];
  }

  var _baseIsTypedArray = baseIsTypedArray;

  /**
   * The base implementation of `_.unary` without support for storing metadata.
   *
   * @private
   * @param {Function} func The function to cap arguments for.
   * @returns {Function} Returns the new capped function.
   */
  function baseUnary(func) {
    return function(value) {
      return func(value);
    };
  }

  var _baseUnary = baseUnary;

  var _nodeUtil = createCommonjsModule(function (module, exports) {
  /** Detect free variable `exports`. */
  var freeExports = exports && !exports.nodeType && exports;

  /** Detect free variable `module`. */
  var freeModule = freeExports && 'object' == 'object' && module && !module.nodeType && module;

  /** Detect the popular CommonJS extension `module.exports`. */
  var moduleExports = freeModule && freeModule.exports === freeExports;

  /** Detect free variable `process` from Node.js. */
  var freeProcess = moduleExports && _freeGlobal.process;

  /** Used to access faster Node.js helpers. */
  var nodeUtil = (function() {
    try {
      // Use `util.types` for Node.js 10+.
      var types = freeModule && freeModule.require && freeModule.require('util').types;

      if (types) {
        return types;
      }

      // Legacy `process.binding('util')` for Node.js < 10.
      return freeProcess && freeProcess.binding && freeProcess.binding('util');
    } catch (e) {}
  }());

  module.exports = nodeUtil;
  });

  /* Node.js helper references. */
  var nodeIsTypedArray = _nodeUtil && _nodeUtil.isTypedArray;

  /**
   * Checks if `value` is classified as a typed array.
   *
   * @static
   * @memberOf _
   * @since 3.0.0
   * @category Lang
   * @param {*} value The value to check.
   * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
   * @example
   *
   * _.isTypedArray(new Uint8Array);
   * // => true
   *
   * _.isTypedArray([]);
   * // => false
   */
  var isTypedArray = nodeIsTypedArray ? _baseUnary(nodeIsTypedArray) : _baseIsTypedArray;

  var isTypedArray_1 = isTypedArray;

  /** Used for built-in method references. */
  var objectProto$7 = Object.prototype;

  /** Used to check objects for own properties. */
  var hasOwnProperty$6 = objectProto$7.hasOwnProperty;

  /**
   * Creates an array of the enumerable property names of the array-like `value`.
   *
   * @private
   * @param {*} value The value to query.
   * @param {boolean} inherited Specify returning inherited property names.
   * @returns {Array} Returns the array of property names.
   */
  function arrayLikeKeys(value, inherited) {
    var isArr = isArray_1(value),
        isArg = !isArr && isArguments_1(value),
        isBuff = !isArr && !isArg && isBuffer_1(value),
        isType = !isArr && !isArg && !isBuff && isTypedArray_1(value),
        skipIndexes = isArr || isArg || isBuff || isType,
        result = skipIndexes ? _baseTimes(value.length, String) : [],
        length = result.length;

    for (var key in value) {
      if ((inherited || hasOwnProperty$6.call(value, key)) &&
          !(skipIndexes && (
             // Safari 9 has enumerable `arguments.length` in strict mode.
             key == 'length' ||
             // Node.js 0.10 has enumerable non-index properties on buffers.
             (isBuff && (key == 'offset' || key == 'parent')) ||
             // PhantomJS 2 has enumerable non-index properties on typed arrays.
             (isType && (key == 'buffer' || key == 'byteLength' || key == 'byteOffset')) ||
             // Skip index properties.
             _isIndex(key, length)
          ))) {
        result.push(key);
      }
    }
    return result;
  }

  var _arrayLikeKeys = arrayLikeKeys;

  /** Used for built-in method references. */
  var objectProto$6 = Object.prototype;

  /**
   * Checks if `value` is likely a prototype object.
   *
   * @private
   * @param {*} value The value to check.
   * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
   */
  function isPrototype(value) {
    var Ctor = value && value.constructor,
        proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto$6;

    return value === proto;
  }

  var _isPrototype = isPrototype;

  /**
   * Creates a unary function that invokes `func` with its argument transformed.
   *
   * @private
   * @param {Function} func The function to wrap.
   * @param {Function} transform The argument transform.
   * @returns {Function} Returns the new function.
   */
  function overArg(func, transform) {
    return function(arg) {
      return func(transform(arg));
    };
  }

  var _overArg = overArg;

  /* Built-in method references for those with the same name as other `lodash` methods. */
  var nativeKeys = _overArg(Object.keys, Object);

  var _nativeKeys = nativeKeys;

  /** Used for built-in method references. */
  var objectProto$5 = Object.prototype;

  /** Used to check objects for own properties. */
  var hasOwnProperty$5 = objectProto$5.hasOwnProperty;

  /**
   * The base implementation of `_.keys` which doesn't treat sparse arrays as dense.
   *
   * @private
   * @param {Object} object The object to query.
   * @returns {Array} Returns the array of property names.
   */
  function baseKeys(object) {
    if (!_isPrototype(object)) {
      return _nativeKeys(object);
    }
    var result = [];
    for (var key in Object(object)) {
      if (hasOwnProperty$5.call(object, key) && key != 'constructor') {
        result.push(key);
      }
    }
    return result;
  }

  var _baseKeys = baseKeys;

  /**
   * Checks if `value` is array-like. A value is considered array-like if it's
   * not a function and has a `value.length` that's an integer greater than or
   * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
   *
   * @static
   * @memberOf _
   * @since 4.0.0
   * @category Lang
   * @param {*} value The value to check.
   * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
   * @example
   *
   * _.isArrayLike([1, 2, 3]);
   * // => true
   *
   * _.isArrayLike(document.body.children);
   * // => true
   *
   * _.isArrayLike('abc');
   * // => true
   *
   * _.isArrayLike(_.noop);
   * // => false
   */
  function isArrayLike(value) {
    return value != null && isLength_1(value.length) && !isFunction_1(value);
  }

  var isArrayLike_1 = isArrayLike;

  /**
   * Creates an array of the own enumerable property names of `object`.
   *
   * **Note:** Non-object values are coerced to objects. See the
   * [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
   * for more details.
   *
   * @static
   * @since 0.1.0
   * @memberOf _
   * @category Object
   * @param {Object} object The object to query.
   * @returns {Array} Returns the array of property names.
   * @example
   *
   * function Foo() {
   *   this.a = 1;
   *   this.b = 2;
   * }
   *
   * Foo.prototype.c = 3;
   *
   * _.keys(new Foo);
   * // => ['a', 'b'] (iteration order is not guaranteed)
   *
   * _.keys('hi');
   * // => ['0', '1']
   */
  function keys(object) {
    return isArrayLike_1(object) ? _arrayLikeKeys(object) : _baseKeys(object);
  }

  var keys_1 = keys;

  /**
   * Creates an array of own enumerable property names and symbols of `object`.
   *
   * @private
   * @param {Object} object The object to query.
   * @returns {Array} Returns the array of property names and symbols.
   */
  function getAllKeys(object) {
    return _baseGetAllKeys(object, keys_1, _getSymbols);
  }

  var _getAllKeys = getAllKeys;

  /** Used to compose bitmasks for value comparisons. */
  var COMPARE_PARTIAL_FLAG$1 = 1;

  /** Used for built-in method references. */
  var objectProto$4 = Object.prototype;

  /** Used to check objects for own properties. */
  var hasOwnProperty$4 = objectProto$4.hasOwnProperty;

  /**
   * A specialized version of `baseIsEqualDeep` for objects with support for
   * partial deep comparisons.
   *
   * @private
   * @param {Object} object The object to compare.
   * @param {Object} other The other object to compare.
   * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
   * @param {Function} customizer The function to customize comparisons.
   * @param {Function} equalFunc The function to determine equivalents of values.
   * @param {Object} stack Tracks traversed `object` and `other` objects.
   * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
   */
  function equalObjects(object, other, bitmask, customizer, equalFunc, stack) {
    var isPartial = bitmask & COMPARE_PARTIAL_FLAG$1,
        objProps = _getAllKeys(object),
        objLength = objProps.length,
        othProps = _getAllKeys(other),
        othLength = othProps.length;

    if (objLength != othLength && !isPartial) {
      return false;
    }
    var index = objLength;
    while (index--) {
      var key = objProps[index];
      if (!(isPartial ? key in other : hasOwnProperty$4.call(other, key))) {
        return false;
      }
    }
    // Check that cyclic values are equal.
    var objStacked = stack.get(object);
    var othStacked = stack.get(other);
    if (objStacked && othStacked) {
      return objStacked == other && othStacked == object;
    }
    var result = true;
    stack.set(object, other);
    stack.set(other, object);

    var skipCtor = isPartial;
    while (++index < objLength) {
      key = objProps[index];
      var objValue = object[key],
          othValue = other[key];

      if (customizer) {
        var compared = isPartial
          ? customizer(othValue, objValue, key, other, object, stack)
          : customizer(objValue, othValue, key, object, other, stack);
      }
      // Recursively compare objects (susceptible to call stack limits).
      if (!(compared === undefined
            ? (objValue === othValue || equalFunc(objValue, othValue, bitmask, customizer, stack))
            : compared
          )) {
        result = false;
        break;
      }
      skipCtor || (skipCtor = key == 'constructor');
    }
    if (result && !skipCtor) {
      var objCtor = object.constructor,
          othCtor = other.constructor;

      // Non `Object` object instances with different constructors are not equal.
      if (objCtor != othCtor &&
          ('constructor' in object && 'constructor' in other) &&
          !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
            typeof othCtor == 'function' && othCtor instanceof othCtor)) {
        result = false;
      }
    }
    stack['delete'](object);
    stack['delete'](other);
    return result;
  }

  var _equalObjects = equalObjects;

  /* Built-in method references that are verified to be native. */
  var DataView = _getNative(_root, 'DataView');

  var _DataView = DataView;

  /* Built-in method references that are verified to be native. */
  var Promise$1 = _getNative(_root, 'Promise');

  var _Promise = Promise$1;

  /* Built-in method references that are verified to be native. */
  var Set = _getNative(_root, 'Set');

  var _Set = Set;

  /* Built-in method references that are verified to be native. */
  var WeakMap = _getNative(_root, 'WeakMap');

  var _WeakMap = WeakMap;

  /** `Object#toString` result references. */
  var mapTag = '[object Map]',
      objectTag$2 = '[object Object]',
      promiseTag = '[object Promise]',
      setTag = '[object Set]',
      weakMapTag = '[object WeakMap]';

  var dataViewTag = '[object DataView]';

  /** Used to detect maps, sets, and weakmaps. */
  var dataViewCtorString = _toSource(_DataView),
      mapCtorString = _toSource(_Map),
      promiseCtorString = _toSource(_Promise),
      setCtorString = _toSource(_Set),
      weakMapCtorString = _toSource(_WeakMap);

  /**
   * Gets the `toStringTag` of `value`.
   *
   * @private
   * @param {*} value The value to query.
   * @returns {string} Returns the `toStringTag`.
   */
  var getTag = _baseGetTag;

  // Fallback for data views, maps, sets, and weak maps in IE 11 and promises in Node.js < 6.
  if ((_DataView && getTag(new _DataView(new ArrayBuffer(1))) != dataViewTag) ||
      (_Map && getTag(new _Map) != mapTag) ||
      (_Promise && getTag(_Promise.resolve()) != promiseTag) ||
      (_Set && getTag(new _Set) != setTag) ||
      (_WeakMap && getTag(new _WeakMap) != weakMapTag)) {
    getTag = function(value) {
      var result = _baseGetTag(value),
          Ctor = result == objectTag$2 ? value.constructor : undefined,
          ctorString = Ctor ? _toSource(Ctor) : '';

      if (ctorString) {
        switch (ctorString) {
          case dataViewCtorString: return dataViewTag;
          case mapCtorString: return mapTag;
          case promiseCtorString: return promiseTag;
          case setCtorString: return setTag;
          case weakMapCtorString: return weakMapTag;
        }
      }
      return result;
    };
  }

  var _getTag = getTag;

  /** Used to compose bitmasks for value comparisons. */
  var COMPARE_PARTIAL_FLAG = 1;

  /** `Object#toString` result references. */
  var argsTag = '[object Arguments]',
      arrayTag = '[object Array]',
      objectTag$1 = '[object Object]';

  /** Used for built-in method references. */
  var objectProto$3 = Object.prototype;

  /** Used to check objects for own properties. */
  var hasOwnProperty$3 = objectProto$3.hasOwnProperty;

  /**
   * A specialized version of `baseIsEqual` for arrays and objects which performs
   * deep comparisons and tracks traversed objects enabling objects with circular
   * references to be compared.
   *
   * @private
   * @param {Object} object The object to compare.
   * @param {Object} other The other object to compare.
   * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
   * @param {Function} customizer The function to customize comparisons.
   * @param {Function} equalFunc The function to determine equivalents of values.
   * @param {Object} [stack] Tracks traversed `object` and `other` objects.
   * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
   */
  function baseIsEqualDeep(object, other, bitmask, customizer, equalFunc, stack) {
    var objIsArr = isArray_1(object),
        othIsArr = isArray_1(other),
        objTag = objIsArr ? arrayTag : _getTag(object),
        othTag = othIsArr ? arrayTag : _getTag(other);

    objTag = objTag == argsTag ? objectTag$1 : objTag;
    othTag = othTag == argsTag ? objectTag$1 : othTag;

    var objIsObj = objTag == objectTag$1,
        othIsObj = othTag == objectTag$1,
        isSameTag = objTag == othTag;

    if (isSameTag && isBuffer_1(object)) {
      if (!isBuffer_1(other)) {
        return false;
      }
      objIsArr = true;
      objIsObj = false;
    }
    if (isSameTag && !objIsObj) {
      stack || (stack = new _Stack);
      return (objIsArr || isTypedArray_1(object))
        ? _equalArrays(object, other, bitmask, customizer, equalFunc, stack)
        : _equalByTag(object, other, objTag, bitmask, customizer, equalFunc, stack);
    }
    if (!(bitmask & COMPARE_PARTIAL_FLAG)) {
      var objIsWrapped = objIsObj && hasOwnProperty$3.call(object, '__wrapped__'),
          othIsWrapped = othIsObj && hasOwnProperty$3.call(other, '__wrapped__');

      if (objIsWrapped || othIsWrapped) {
        var objUnwrapped = objIsWrapped ? object.value() : object,
            othUnwrapped = othIsWrapped ? other.value() : other;

        stack || (stack = new _Stack);
        return equalFunc(objUnwrapped, othUnwrapped, bitmask, customizer, stack);
      }
    }
    if (!isSameTag) {
      return false;
    }
    stack || (stack = new _Stack);
    return _equalObjects(object, other, bitmask, customizer, equalFunc, stack);
  }

  var _baseIsEqualDeep = baseIsEqualDeep;

  /**
   * The base implementation of `_.isEqual` which supports partial comparisons
   * and tracks traversed objects.
   *
   * @private
   * @param {*} value The value to compare.
   * @param {*} other The other value to compare.
   * @param {boolean} bitmask The bitmask flags.
   *  1 - Unordered comparison
   *  2 - Partial comparison
   * @param {Function} [customizer] The function to customize comparisons.
   * @param {Object} [stack] Tracks traversed `value` and `other` objects.
   * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
   */
  function baseIsEqual(value, other, bitmask, customizer, stack) {
    if (value === other) {
      return true;
    }
    if (value == null || other == null || (!isObjectLike_1(value) && !isObjectLike_1(other))) {
      return value !== value && other !== other;
    }
    return _baseIsEqualDeep(value, other, bitmask, customizer, baseIsEqual, stack);
  }

  var _baseIsEqual = baseIsEqual;

  /**
   * Performs a deep comparison between two values to determine if they are
   * equivalent.
   *
   * **Note:** This method supports comparing arrays, array buffers, booleans,
   * date objects, error objects, maps, numbers, `Object` objects, regexes,
   * sets, strings, symbols, and typed arrays. `Object` objects are compared
   * by their own, not inherited, enumerable properties. Functions and DOM
   * nodes are compared by strict equality, i.e. `===`.
   *
   * @static
   * @memberOf _
   * @since 0.1.0
   * @category Lang
   * @param {*} value The value to compare.
   * @param {*} other The other value to compare.
   * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
   * @example
   *
   * var object = { 'a': 1 };
   * var other = { 'a': 1 };
   *
   * _.isEqual(object, other);
   * // => true
   *
   * object === other;
   * // => false
   */
  function isEqual(value, other) {
    return _baseIsEqual(value, other);
  }

  var isEqual_1 = isEqual;

  function ownKeys$2(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); if (enumerableOnly) symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; }); keys.push.apply(keys, symbols); } return keys; }

  function _objectSpread$2(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; if (i % 2) { ownKeys$2(Object(source), true).forEach(function (key) { _defineProperty$1(target, key, source[key]); }); } else if (Object.getOwnPropertyDescriptors) { Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)); } else { ownKeys$2(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } } return target; }
  var DEFAULT_OPTIONS = {
    container: false,
    delay: 0,
    html: false,
    placement: 'top',
    title: '',
    template: '<div class="tooltip" role="tooltip"><div class="tooltip-arrow"></div><div class="tooltip-inner"></div></div>',
    trigger: 'hover focus',
    offset: 0
  };
  var openTooltips = [];

  var Tooltip = /*#__PURE__*/function () {
    /**
     * Create a new Tooltip.js instance
     * @class Tooltip
     * @param {HTMLElement} reference - The DOM node used as reference of the tooltip (it can be a jQuery element).
     * @param {Object} options
     * @param {String} options.placement=bottom
     *      Placement of the popper accepted values: `top(-start, -end), right(-start, -end), bottom(-start, -end),
     *      left(-start, -end)`
     * @param {HTMLElement|String|false} options.container=false - Append the tooltip to a specific element.
     * @param {Number|Object} options.delay=0
     *      Delay showing and hiding the tooltip (ms) - does not apply to manual trigger type.
     *      If a number is supplied, delay is applied to both hide/show.
     *      Object structure is: `{ show: 500, hide: 100 }`
     * @param {Boolean} options.html=false - Insert HTML into the tooltip. If false, the content will inserted with `innerText`.
     * @param {String|PlacementFunction} options.placement='top' - One of the allowed placements, or a function returning one of them.
     * @param {String} [options.template='<div class="tooltip" role="tooltip"><div class="tooltip-arrow"></div><div class="tooltip-inner"></div></div>']
     *      Base HTML to used when creating the tooltip.
     *      The tooltip's `title` will be injected into the `.tooltip-inner` or `.tooltip__inner`.
     *      `.tooltip-arrow` or `.tooltip__arrow` will become the tooltip's arrow.
     *      The outermost wrapper element should have the `.tooltip` class.
     * @param {String|HTMLElement|TitleFunction} options.title='' - Default title value if `title` attribute isn't present.
     * @param {String} [options.trigger='hover focus']
     *      How tooltip is triggered - click, hover, focus, manual.
     *      You may pass multiple triggers; separate them with a space. `manual` cannot be combined with any other trigger.
     * @param {HTMLElement} options.boundariesElement
     *      The element used as boundaries for the tooltip. For more information refer to Popper.js'
     *      [boundariesElement docs](https://popper.js.org/popper-documentation.html)
     * @param {Number|String} options.offset=0 - Offset of the tooltip relative to its reference. For more information refer to Popper.js'
     *      [offset docs](https://popper.js.org/popper-documentation.html)
     * @param {Object} options.popperOptions={} - Popper options, will be passed directly to popper instance. For more information refer to Popper.js'
     *      [options docs](https://popper.js.org/popper-documentation.html)
     * @param {string} [options.ariaId] Id used for accessibility
     * @return {Object} instance - The generated tooltip instance
     */
    function Tooltip(_reference, _options) {
      var _this = this;

      _classCallCheck(this, Tooltip);

      _defineProperty$1(this, "_events", []);

      _defineProperty$1(this, "_setTooltipNodeEvent", function (evt, reference, delay, options) {
        var relatedreference = evt.relatedreference || evt.toElement || evt.relatedTarget;

        var callback = function callback(evt2) {
          var relatedreference2 = evt2.relatedreference || evt2.toElement || evt2.relatedTarget; // Remove event listener after call

          _this._tooltipNode.removeEventListener(evt.type, callback); // If the new reference is not the reference element


          if (!reference.contains(relatedreference2)) {
            // Schedule to hide tooltip
            _this._scheduleHide(reference, options.delay, options, evt2);
          }
        };

        if (_this._tooltipNode.contains(relatedreference)) {
          // listen to mouseleave on the tooltip element to be able to hide the tooltip
          _this._tooltipNode.addEventListener(evt.type, callback);

          return true;
        }

        return false;
      });

      // apply user options over default ones
      _options = _objectSpread$2(_objectSpread$2({}, DEFAULT_OPTIONS), _options);
      _reference.jquery && (_reference = _reference[0]);
      this.show = this.show.bind(this);
      this.hide = this.hide.bind(this); // cache reference and options

      this.reference = _reference;
      this.options = _options; // set initial state

      this._isOpen = false;

      this._init();
    } //
    // Public methods
    //

    /**
     * Reveals an element's tooltip. This is considered a "manual" triggering of the tooltip.
     * Tooltips with zero-length titles are never displayed.
     * @method Tooltip#show
     * @memberof Tooltip
     */


    _createClass(Tooltip, [{
      key: "show",
      value: function show() {
        this._show(this.reference, this.options);
      }
      /**
       * Hides an element’s tooltip. This is considered a “manual” triggering of the tooltip.
       * @method Tooltip#hide
       * @memberof Tooltip
       */

    }, {
      key: "hide",
      value: function hide() {
        this._hide();
      }
      /**
       * Hides and destroys an element’s tooltip.
       * @method Tooltip#dispose
       * @memberof Tooltip
       */

    }, {
      key: "dispose",
      value: function dispose() {
        this._dispose();
      }
      /**
       * Toggles an element’s tooltip. This is considered a “manual” triggering of the tooltip.
       * @method Tooltip#toggle
       * @memberof Tooltip
       */

    }, {
      key: "toggle",
      value: function toggle() {
        if (this._isOpen) {
          return this.hide();
        } else {
          return this.show();
        }
      }
    }, {
      key: "setClasses",
      value: function setClasses(classes) {
        this._classes = classes;
      }
    }, {
      key: "setContent",
      value: function setContent(content) {
        this.options.title = content;

        if (this._tooltipNode) {
          this._setContent(content, this.options);
        }
      }
    }, {
      key: "setOptions",
      value: function setOptions(options) {
        var classesUpdated = false;
        var classes = options && options.classes || directive.options.defaultClass;

        if (!isEqual_1(this._classes, classes)) {
          this.setClasses(classes);
          classesUpdated = true;
        }

        options = getOptions(options);
        var needPopperUpdate = false;
        var needRestart = false;

        if (this.options.offset !== options.offset || this.options.placement !== options.placement) {
          needPopperUpdate = true;
        }

        if (this.options.template !== options.template || this.options.trigger !== options.trigger || this.options.container !== options.container || classesUpdated) {
          needRestart = true;
        }

        for (var key in options) {
          this.options[key] = options[key];
        }

        if (this._tooltipNode) {
          if (needRestart) {
            var isOpen = this._isOpen;
            this.dispose();

            this._init();

            if (isOpen) {
              this.show();
            }
          } else if (needPopperUpdate) {
            this.popperInstance.update();
          }
        }
      } //
      // Private methods
      //

    }, {
      key: "_init",
      value: function _init() {
        // get events list
        var events = typeof this.options.trigger === 'string' ? this.options.trigger.split(' ') : [];
        this._isDisposed = false;
        this._enableDocumentTouch = events.indexOf('manual') === -1;
        events = events.filter(function (trigger) {
          return ['click', 'hover', 'focus'].indexOf(trigger) !== -1;
        }); // set event listeners

        this._setEventListeners(this.reference, events, this.options); // title attribute


        this.$_originalTitle = this.reference.getAttribute('title');
        this.reference.removeAttribute('title');
        this.reference.setAttribute('data-original-title', this.$_originalTitle);
      }
      /**
       * Creates a new tooltip node
       * @memberof Tooltip
       * @private
       * @param {HTMLElement} reference
       * @param {String} template
       * @param {String|HTMLElement|TitleFunction} title
       * @param {Boolean} allowHtml
       * @return {HTMLelement} tooltipNode
       */

    }, {
      key: "_create",
      value: function _create(reference, template) {
        var _this2 = this;

        // create tooltip element
        var tooltipGenerator = window.document.createElement('div');
        tooltipGenerator.innerHTML = template.trim();
        var tooltipNode = tooltipGenerator.childNodes[0]; // add unique ID to our tooltip (needed for accessibility reasons)

        tooltipNode.id = this.options.ariaId || "tooltip_".concat(Math.random().toString(36).substr(2, 10)); // Initially hide the tooltip
        // The attribute will be switched in a next frame so
        // CSS transitions can play

        tooltipNode.setAttribute('aria-hidden', 'true');

        if (this.options.autoHide && this.options.trigger.indexOf('hover') !== -1) {
          tooltipNode.addEventListener('mouseenter', function (evt) {
            return _this2._scheduleHide(reference, _this2.options.delay, _this2.options, evt);
          });
          tooltipNode.addEventListener('click', function (evt) {
            return _this2._scheduleHide(reference, _this2.options.delay, _this2.options, evt);
          });
        } // return the generated tooltip node


        return tooltipNode;
      }
    }, {
      key: "_setContent",
      value: function _setContent(content, options) {
        var _this3 = this;

        this.asyncContent = false;

        this._applyContent(content, options).then(function () {
          if (!_this3.popperInstance) return;

          _this3.popperInstance.update();
        });
      }
    }, {
      key: "_applyContent",
      value: function _applyContent(title, options) {
        var _this4 = this;

        return new Promise(function (resolve, reject) {
          var allowHtml = options.html;
          var rootNode = _this4._tooltipNode;
          if (!rootNode) return;
          var titleNode = rootNode.querySelector(_this4.options.innerSelector);

          if (title.nodeType === 1) {
            // if title is a node, append it only if allowHtml is true
            if (allowHtml) {
              while (titleNode.firstChild) {
                titleNode.removeChild(titleNode.firstChild);
              }

              titleNode.appendChild(title);
            }
          } else if (typeof title === 'function') {
            // if title is a function, call it and set innerText or innerHtml depending by `allowHtml` value
            var result = title();

            if (result && typeof result.then === 'function') {
              _this4.asyncContent = true;
              options.loadingClass && addClasses(rootNode, options.loadingClass);

              if (options.loadingContent) {
                _this4._applyContent(options.loadingContent, options);
              }

              result.then(function (asyncResult) {
                options.loadingClass && removeClasses(rootNode, options.loadingClass);
                return _this4._applyContent(asyncResult, options);
              }).then(resolve).catch(reject);
            } else {
              _this4._applyContent(result, options).then(resolve).catch(reject);
            }

            return;
          } else {
            // if it's just a simple text, set innerText or innerHtml depending by `allowHtml` value
            allowHtml ? titleNode.innerHTML = title : titleNode.innerText = title;
          }

          resolve();
        });
      }
    }, {
      key: "_show",
      value: function _show(reference, options) {
        if (options && typeof options.container === 'string') {
          var container = document.querySelector(options.container);
          if (!container) return;
        }

        clearTimeout(this._disposeTimer);
        options = Object.assign({}, options);
        delete options.offset;
        var updateClasses = true;

        if (this._tooltipNode) {
          addClasses(this._tooltipNode, this._classes);
          updateClasses = false;
        }

        var result = this._ensureShown(reference, options);

        if (updateClasses && this._tooltipNode) {
          addClasses(this._tooltipNode, this._classes);
        }

        addClasses(reference, ['v-tooltip-open']);
        return result;
      }
    }, {
      key: "_ensureShown",
      value: function _ensureShown(reference, options) {
        var _this5 = this;

        // don't show if it's already visible
        if (this._isOpen) {
          return this;
        }

        this._isOpen = true;
        openTooltips.push(this); // if the tooltipNode already exists, just show it

        if (this._tooltipNode) {
          this._tooltipNode.style.display = '';

          this._tooltipNode.setAttribute('aria-hidden', 'false');

          this.popperInstance.enableEventListeners();
          this.popperInstance.update();

          if (this.asyncContent) {
            this._setContent(options.title, options);
          }

          return this;
        } // get title


        var title = reference.getAttribute('title') || options.title; // don't show tooltip if no title is defined

        if (!title) {
          return this;
        } // create tooltip node


        var tooltipNode = this._create(reference, options.template);

        this._tooltipNode = tooltipNode; // Add `aria-describedby` to our reference element for accessibility reasons

        reference.setAttribute('aria-describedby', tooltipNode.id); // append tooltip to container

        var container = this._findContainer(options.container, reference);

        this._append(tooltipNode, container);

        var popperOptions = _objectSpread$2(_objectSpread$2({}, options.popperOptions), {}, {
          placement: options.placement
        });

        popperOptions.modifiers = _objectSpread$2(_objectSpread$2({}, popperOptions.modifiers), {}, {
          arrow: {
            element: this.options.arrowSelector
          }
        });

        if (options.boundariesElement) {
          popperOptions.modifiers.preventOverflow = {
            boundariesElement: options.boundariesElement
          };
        }

        this.popperInstance = new Popper(reference, tooltipNode, popperOptions);

        this._setContent(title, options); // Fix position


        requestAnimationFrame(function () {
          if (!_this5._isDisposed && _this5.popperInstance) {
            _this5.popperInstance.update(); // Show the tooltip


            requestAnimationFrame(function () {
              if (!_this5._isDisposed) {
                _this5._isOpen && tooltipNode.setAttribute('aria-hidden', 'false');
              } else {
                _this5.dispose();
              }
            });
          } else {
            _this5.dispose();
          }
        });
        return this;
      }
    }, {
      key: "_noLongerOpen",
      value: function _noLongerOpen() {
        var index = openTooltips.indexOf(this);

        if (index !== -1) {
          openTooltips.splice(index, 1);
        }
      }
    }, {
      key: "_hide",
      value: function _hide()
      /* reference, options */
      {
        var _this6 = this;

        // don't hide if it's already hidden
        if (!this._isOpen) {
          return this;
        }

        this._isOpen = false;

        this._noLongerOpen(); // hide tooltipNode


        this._tooltipNode.style.display = 'none';

        this._tooltipNode.setAttribute('aria-hidden', 'true');

        if (this.popperInstance) {
          this.popperInstance.disableEventListeners();
        }

        clearTimeout(this._disposeTimer);
        var disposeTime = directive.options.disposeTimeout;

        if (disposeTime !== null) {
          this._disposeTimer = setTimeout(function () {
            if (_this6._tooltipNode) {
              _this6._tooltipNode.removeEventListener('mouseenter', _this6.hide);

              _this6._tooltipNode.removeEventListener('click', _this6.hide); // Don't remove popper instance, just the HTML element


              _this6._removeTooltipNode();
            }
          }, disposeTime);
        }

        removeClasses(this.reference, ['v-tooltip-open']);
        return this;
      }
    }, {
      key: "_removeTooltipNode",
      value: function _removeTooltipNode() {
        if (!this._tooltipNode) return;
        var parentNode = this._tooltipNode.parentNode;

        if (parentNode) {
          parentNode.removeChild(this._tooltipNode);
          this.reference.removeAttribute('aria-describedby');
        }

        this._tooltipNode = null;
      }
    }, {
      key: "_dispose",
      value: function _dispose() {
        var _this7 = this;

        this._isDisposed = true;
        this.reference.removeAttribute('data-original-title');

        if (this.$_originalTitle) {
          this.reference.setAttribute('title', this.$_originalTitle);
        } // remove event listeners first to prevent any unexpected behaviour


        this._events.forEach(function (_ref) {
          var func = _ref.func,
              event = _ref.event;

          _this7.reference.removeEventListener(event, func);
        });

        this._events = [];

        if (this._tooltipNode) {
          this._hide();

          this._tooltipNode.removeEventListener('mouseenter', this.hide);

          this._tooltipNode.removeEventListener('click', this.hide); // destroy instance


          this.popperInstance.destroy(); // destroy tooltipNode if removeOnDestroy is not set, as popperInstance.destroy() already removes the element

          if (!this.popperInstance.options.removeOnDestroy) {
            this._removeTooltipNode();
          }
        } else {
          this._noLongerOpen();
        }

        return this;
      }
    }, {
      key: "_findContainer",
      value: function _findContainer(container, reference) {
        // if container is a query, get the relative element
        if (typeof container === 'string') {
          container = window.document.querySelector(container);
        } else if (container === false) {
          // if container is `false`, set it to reference parent
          container = reference.parentNode;
        }

        return container;
      }
      /**
       * Append tooltip to container
       * @memberof Tooltip
       * @private
       * @param {HTMLElement} tooltip
       * @param {HTMLElement|String|false} container
       */

    }, {
      key: "_append",
      value: function _append(tooltipNode, container) {
        container.appendChild(tooltipNode);
      }
    }, {
      key: "_setEventListeners",
      value: function _setEventListeners(reference, events, options) {
        var _this8 = this;

        var directEvents = [];
        var oppositeEvents = [];
        events.forEach(function (event) {
          switch (event) {
            case 'hover':
              directEvents.push('mouseenter');
              oppositeEvents.push('mouseleave');
              if (_this8.options.hideOnTargetClick) oppositeEvents.push('click');
              break;

            case 'focus':
              directEvents.push('focus');
              oppositeEvents.push('blur');
              if (_this8.options.hideOnTargetClick) oppositeEvents.push('click');
              break;

            case 'click':
              directEvents.push('click');
              oppositeEvents.push('click');
              break;
          }
        }); // schedule show tooltip

        directEvents.forEach(function (event) {
          var func = function func(evt) {
            if (_this8._isOpen === true) {
              return;
            }

            evt.usedByTooltip = true;

            _this8._scheduleShow(reference, options.delay, options, evt);
          };

          _this8._events.push({
            event: event,
            func: func
          });

          reference.addEventListener(event, func);
        }); // schedule hide tooltip

        oppositeEvents.forEach(function (event) {
          var func = function func(evt) {
            if (evt.usedByTooltip === true) {
              return;
            }

            _this8._scheduleHide(reference, options.delay, options, evt);
          };

          _this8._events.push({
            event: event,
            func: func
          });

          reference.addEventListener(event, func);
        });
      }
    }, {
      key: "_onDocumentTouch",
      value: function _onDocumentTouch(event) {
        if (this._enableDocumentTouch) {
          this._scheduleHide(this.reference, this.options.delay, this.options, event);
        }
      }
    }, {
      key: "_scheduleShow",
      value: function _scheduleShow(reference, delay, options
      /*, evt */
      ) {
        var _this9 = this;

        // defaults to 0
        var computedDelay = delay && delay.show || delay || 0;
        clearTimeout(this._scheduleTimer);
        this._scheduleTimer = window.setTimeout(function () {
          return _this9._show(reference, options);
        }, computedDelay);
      }
    }, {
      key: "_scheduleHide",
      value: function _scheduleHide(reference, delay, options, evt) {
        var _this10 = this;

        // defaults to 0
        var computedDelay = delay && delay.hide || delay || 0;
        clearTimeout(this._scheduleTimer);
        this._scheduleTimer = window.setTimeout(function () {
          if (_this10._isOpen === false) {
            return;
          }

          if (!_this10._tooltipNode.ownerDocument.body.contains(_this10._tooltipNode)) {
            return;
          } // if we are hiding because of a mouseleave, we must check that the new
          // reference isn't the tooltip, because in this case we don't want to hide it


          if (evt.type === 'mouseleave') {
            var isSet = _this10._setTooltipNodeEvent(evt, reference, delay, options); // if we set the new event, don't hide the tooltip yet
            // the new event will take care to hide it if necessary


            if (isSet) {
              return;
            }
          }

          _this10._hide(reference, options);
        }, computedDelay);
      }
    }]);

    return Tooltip;
  }(); // Hide tooltips on touch devices

  if (typeof document !== 'undefined') {
    document.addEventListener('touchstart', function (event) {
      for (var i = 0; i < openTooltips.length; i++) {
        openTooltips[i]._onDocumentTouch(event);
      }
    }, supportsPassive ? {
      passive: true,
      capture: true
    } : true);
  }
  /**
   * Placement function, its context is the Tooltip instance.
   * @memberof Tooltip
   * @callback PlacementFunction
   * @param {HTMLElement} tooltip - tooltip DOM node.
   * @param {HTMLElement} reference - reference DOM node.
   * @return {String} placement - One of the allowed placement options.
   */

  /**
   * Title function, its context is the Tooltip instance.
   * @memberof Tooltip
   * @callback TitleFunction
   * @return {String} placement - The desired title.
   */

  function ownKeys$1(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); if (enumerableOnly) symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; }); keys.push.apply(keys, symbols); } return keys; }

  function _objectSpread$1(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; if (i % 2) { ownKeys$1(Object(source), true).forEach(function (key) { _defineProperty$1(target, key, source[key]); }); } else if (Object.getOwnPropertyDescriptors) { Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)); } else { ownKeys$1(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } } return target; }
  var state = {
    enabled: true
  };
  var positions = ['top', 'top-start', 'top-end', 'right', 'right-start', 'right-end', 'bottom', 'bottom-start', 'bottom-end', 'left', 'left-start', 'left-end'];
  var defaultOptions = {
    // Default tooltip placement relative to target element
    defaultPlacement: 'top',
    // Default CSS classes applied to the tooltip element
    defaultClass: 'vue-tooltip-theme',
    // Default CSS classes applied to the target element of the tooltip
    defaultTargetClass: 'has-tooltip',
    // Is the content HTML by default?
    defaultHtml: true,
    // Default HTML template of the tooltip element
    // It must include `tooltip-arrow` & `tooltip-inner` CSS classes (can be configured, see below)
    // Change if the classes conflict with other libraries (for example bootstrap)
    defaultTemplate: '<div class="tooltip" role="tooltip"><div class="tooltip-arrow"></div><div class="tooltip-inner"></div></div>',
    // Selector used to get the arrow element in the tooltip template
    defaultArrowSelector: '.tooltip-arrow, .tooltip__arrow',
    // Selector used to get the inner content element in the tooltip template
    defaultInnerSelector: '.tooltip-inner, .tooltip__inner',
    // Delay (ms)
    defaultDelay: 0,
    // Default events that trigger the tooltip
    defaultTrigger: 'hover focus',
    // Default position offset (px)
    defaultOffset: 0,
    // Default container where the tooltip will be appended
    defaultContainer: 'body',
    defaultBoundariesElement: undefined,
    defaultPopperOptions: {},
    // Class added when content is loading
    defaultLoadingClass: 'tooltip-loading',
    // Displayed when tooltip content is loading
    defaultLoadingContent: '...',
    // Hide on mouseover tooltip
    autoHide: true,
    // Close tooltip on click on tooltip target?
    defaultHideOnTargetClick: true,
    // Auto destroy tooltip DOM nodes (ms)
    disposeTimeout: 5000,
    // Options for popover
    popover: {
      defaultPlacement: 'bottom',
      // Use the `popoverClass` prop for theming
      defaultClass: 'vue-popover-theme',
      // Base class (change if conflicts with other libraries)
      defaultBaseClass: 'tooltip popover',
      // Wrapper class (contains arrow and inner)
      defaultWrapperClass: 'wrapper',
      // Inner content class
      defaultInnerClass: 'tooltip-inner popover-inner',
      // Arrow class
      defaultArrowClass: 'tooltip-arrow popover-arrow',
      // Class added when popover is open
      defaultOpenClass: 'open',
      defaultDelay: 0,
      defaultTrigger: 'click',
      defaultOffset: 0,
      defaultContainer: 'body',
      defaultBoundariesElement: undefined,
      defaultPopperOptions: {},
      // Hides if clicked outside of popover
      defaultAutoHide: true,
      // Update popper on content resize
      defaultHandleResize: true
    }
  };
  function getOptions(options) {
    var result = {
      placement: typeof options.placement !== 'undefined' ? options.placement : directive.options.defaultPlacement,
      delay: typeof options.delay !== 'undefined' ? options.delay : directive.options.defaultDelay,
      html: typeof options.html !== 'undefined' ? options.html : directive.options.defaultHtml,
      template: typeof options.template !== 'undefined' ? options.template : directive.options.defaultTemplate,
      arrowSelector: typeof options.arrowSelector !== 'undefined' ? options.arrowSelector : directive.options.defaultArrowSelector,
      innerSelector: typeof options.innerSelector !== 'undefined' ? options.innerSelector : directive.options.defaultInnerSelector,
      trigger: typeof options.trigger !== 'undefined' ? options.trigger : directive.options.defaultTrigger,
      offset: typeof options.offset !== 'undefined' ? options.offset : directive.options.defaultOffset,
      container: typeof options.container !== 'undefined' ? options.container : directive.options.defaultContainer,
      boundariesElement: typeof options.boundariesElement !== 'undefined' ? options.boundariesElement : directive.options.defaultBoundariesElement,
      autoHide: typeof options.autoHide !== 'undefined' ? options.autoHide : directive.options.autoHide,
      hideOnTargetClick: typeof options.hideOnTargetClick !== 'undefined' ? options.hideOnTargetClick : directive.options.defaultHideOnTargetClick,
      loadingClass: typeof options.loadingClass !== 'undefined' ? options.loadingClass : directive.options.defaultLoadingClass,
      loadingContent: typeof options.loadingContent !== 'undefined' ? options.loadingContent : directive.options.defaultLoadingContent,
      popperOptions: _objectSpread$1({}, typeof options.popperOptions !== 'undefined' ? options.popperOptions : directive.options.defaultPopperOptions)
    };

    if (result.offset) {
      var typeofOffset = _typeof(result.offset);

      var offset = result.offset; // One value -> switch

      if (typeofOffset === 'number' || typeofOffset === 'string' && offset.indexOf(',') === -1) {
        offset = "0, ".concat(offset);
      }

      if (!result.popperOptions.modifiers) {
        result.popperOptions.modifiers = {};
      }

      result.popperOptions.modifiers.offset = {
        offset: offset
      };
    }

    if (result.trigger && result.trigger.indexOf('click') !== -1) {
      result.hideOnTargetClick = false;
    }

    return result;
  }
  function getPlacement(value, modifiers) {
    var placement = value.placement;

    for (var i = 0; i < positions.length; i++) {
      var pos = positions[i];

      if (modifiers[pos]) {
        placement = pos;
      }
    }

    return placement;
  }
  function getContent(value) {
    var type = _typeof(value);

    if (type === 'string') {
      return value;
    } else if (value && type === 'object') {
      return value.content;
    } else {
      return false;
    }
  }
  function createTooltip(el, value) {
    var modifiers = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};
    var content = getContent(value);
    var classes = typeof value.classes !== 'undefined' ? value.classes : directive.options.defaultClass;

    var opts = _objectSpread$1({
      title: content
    }, getOptions(_objectSpread$1(_objectSpread$1({}, _typeof(value) === 'object' ? value : {}), {}, {
      placement: getPlacement(value, modifiers)
    })));

    var tooltip = el._tooltip = new Tooltip(el, opts);
    tooltip.setClasses(classes);
    tooltip._vueEl = el; // Class on target

    var targetClasses = typeof value.targetClasses !== 'undefined' ? value.targetClasses : directive.options.defaultTargetClass;
    el._tooltipTargetClasses = targetClasses;
    addClasses(el, targetClasses);
    return tooltip;
  }
  function destroyTooltip(el) {
    if (el._tooltip) {
      el._tooltip.dispose();

      delete el._tooltip;
      delete el._tooltipOldShow;
    }

    if (el._tooltipTargetClasses) {
      removeClasses(el, el._tooltipTargetClasses);
      delete el._tooltipTargetClasses;
    }
  }
  function bind(el, _ref) {
    var value = _ref.value;
        _ref.oldValue;
        var modifiers = _ref.modifiers;
    var content = getContent(value);

    if (!content || !state.enabled) {
      destroyTooltip(el);
    } else {
      var tooltip;

      if (el._tooltip) {
        tooltip = el._tooltip; // Content

        tooltip.setContent(content); // Options

        tooltip.setOptions(_objectSpread$1(_objectSpread$1({}, value), {}, {
          placement: getPlacement(value, modifiers)
        }));
      } else {
        tooltip = createTooltip(el, value, modifiers);
      } // Manual show


      if (typeof value.show !== 'undefined' && value.show !== el._tooltipOldShow) {
        el._tooltipOldShow = value.show;
        value.show ? tooltip.show() : tooltip.hide();
      }
    }
  }
  var directive = {
    options: defaultOptions,
    bind: bind,
    update: bind,
    unbind: function unbind(el) {
      destroyTooltip(el);
    }
  };

  function addListeners(el) {
    el.addEventListener('click', onClick);
    el.addEventListener('touchstart', onTouchStart, supportsPassive ? {
      passive: true
    } : false);
  }

  function removeListeners(el) {
    el.removeEventListener('click', onClick);
    el.removeEventListener('touchstart', onTouchStart);
    el.removeEventListener('touchend', onTouchEnd);
    el.removeEventListener('touchcancel', onTouchCancel);
  }

  function onClick(event) {
    var el = event.currentTarget;
    event.closePopover = !el.$_vclosepopover_touch;
    event.closeAllPopover = el.$_closePopoverModifiers && !!el.$_closePopoverModifiers.all;
  }

  function onTouchStart(event) {
    if (event.changedTouches.length === 1) {
      var el = event.currentTarget;
      el.$_vclosepopover_touch = true;
      var touch = event.changedTouches[0];
      el.$_vclosepopover_touchPoint = touch;
      el.addEventListener('touchend', onTouchEnd);
      el.addEventListener('touchcancel', onTouchCancel);
    }
  }

  function onTouchEnd(event) {
    var el = event.currentTarget;
    el.$_vclosepopover_touch = false;

    if (event.changedTouches.length === 1) {
      var touch = event.changedTouches[0];
      var firstTouch = el.$_vclosepopover_touchPoint;
      event.closePopover = Math.abs(touch.screenY - firstTouch.screenY) < 20 && Math.abs(touch.screenX - firstTouch.screenX) < 20;
      event.closeAllPopover = el.$_closePopoverModifiers && !!el.$_closePopoverModifiers.all;
    }
  }

  function onTouchCancel(event) {
    var el = event.currentTarget;
    el.$_vclosepopover_touch = false;
  }

  var vclosepopover = {
    bind: function bind(el, _ref) {
      var value = _ref.value,
          modifiers = _ref.modifiers;
      el.$_closePopoverModifiers = modifiers;

      if (typeof value === 'undefined' || value) {
        addListeners(el);
      }
    },
    update: function update(el, _ref2) {
      var value = _ref2.value,
          oldValue = _ref2.oldValue,
          modifiers = _ref2.modifiers;
      el.$_closePopoverModifiers = modifiers;

      if (value !== oldValue) {
        if (typeof value === 'undefined' || value) {
          addListeners(el);
        } else {
          removeListeners(el);
        }
      }
    },
    unbind: function unbind(el) {
      removeListeners(el);
    }
  };

  function getInternetExplorerVersion() {
    var ua = window.navigator.userAgent;
    var msie = ua.indexOf('MSIE ');

    if (msie > 0) {
      // IE 10 or older => return version number
      return parseInt(ua.substring(msie + 5, ua.indexOf('.', msie)), 10);
    }

    var trident = ua.indexOf('Trident/');

    if (trident > 0) {
      // IE 11 => return version number
      var rv = ua.indexOf('rv:');
      return parseInt(ua.substring(rv + 3, ua.indexOf('.', rv)), 10);
    }

    var edge = ua.indexOf('Edge/');

    if (edge > 0) {
      // Edge (IE 12+) => return version number
      return parseInt(ua.substring(edge + 5, ua.indexOf('.', edge)), 10);
    } // other browser


    return -1;
  }

  //
  var isIE;

  function initCompat() {
    if (!initCompat.init) {
      initCompat.init = true;
      isIE = getInternetExplorerVersion() !== -1;
    }
  }

  var script$1 = {
    name: 'ResizeObserver',
    props: {
      emitOnMount: {
        type: Boolean,
        default: false
      },
      ignoreWidth: {
        type: Boolean,
        default: false
      },
      ignoreHeight: {
        type: Boolean,
        default: false
      }
    },
    mounted: function mounted() {
      var _this = this;

      initCompat();
      this.$nextTick(function () {
        _this._w = _this.$el.offsetWidth;
        _this._h = _this.$el.offsetHeight;

        if (_this.emitOnMount) {
          _this.emitSize();
        }
      });
      var object = document.createElement('object');
      this._resizeObject = object;
      object.setAttribute('aria-hidden', 'true');
      object.setAttribute('tabindex', -1);
      object.onload = this.addResizeHandlers;
      object.type = 'text/html';

      if (isIE) {
        this.$el.appendChild(object);
      }

      object.data = 'about:blank';

      if (!isIE) {
        this.$el.appendChild(object);
      }
    },
    beforeDestroy: function beforeDestroy() {
      this.removeResizeHandlers();
    },
    methods: {
      compareAndNotify: function compareAndNotify() {
        if (!this.ignoreWidth && this._w !== this.$el.offsetWidth || !this.ignoreHeight && this._h !== this.$el.offsetHeight) {
          this._w = this.$el.offsetWidth;
          this._h = this.$el.offsetHeight;
          this.emitSize();
        }
      },
      emitSize: function emitSize() {
        this.$emit('notify', {
          width: this._w,
          height: this._h
        });
      },
      addResizeHandlers: function addResizeHandlers() {
        this._resizeObject.contentDocument.defaultView.addEventListener('resize', this.compareAndNotify);

        this.compareAndNotify();
      },
      removeResizeHandlers: function removeResizeHandlers() {
        if (this._resizeObject && this._resizeObject.onload) {
          if (!isIE && this._resizeObject.contentDocument) {
            this._resizeObject.contentDocument.defaultView.removeEventListener('resize', this.compareAndNotify);
          }

          this.$el.removeChild(this._resizeObject);
          this._resizeObject.onload = null;
          this._resizeObject = null;
        }
      }
    }
  };

  function normalizeComponent$1(template, style, script, scopeId, isFunctionalTemplate, moduleIdentifier
  /* server only */
  , shadowMode, createInjector, createInjectorSSR, createInjectorShadow) {
    if (typeof shadowMode !== 'boolean') {
      createInjectorSSR = createInjector;
      createInjector = shadowMode;
      shadowMode = false;
    } // Vue.extend constructor export interop.


    var options = typeof script === 'function' ? script.options : script; // render functions

    if (template && template.render) {
      options.render = template.render;
      options.staticRenderFns = template.staticRenderFns;
      options._compiled = true; // functional template

      if (isFunctionalTemplate) {
        options.functional = true;
      }
    } // scopedId


    if (scopeId) {
      options._scopeId = scopeId;
    }

    var hook;

    if (moduleIdentifier) {
      // server build
      hook = function hook(context) {
        // 2.3 injection
        context = context || // cached call
        this.$vnode && this.$vnode.ssrContext || // stateful
        this.parent && this.parent.$vnode && this.parent.$vnode.ssrContext; // functional
        // 2.2 with runInNewContext: true

        if (!context && typeof __VUE_SSR_CONTEXT__ !== 'undefined') {
          context = __VUE_SSR_CONTEXT__;
        } // inject component styles


        if (style) {
          style.call(this, createInjectorSSR(context));
        } // register component module identifier for async chunk inference


        if (context && context._registeredComponents) {
          context._registeredComponents.add(moduleIdentifier);
        }
      }; // used by ssr in case component is cached and beforeCreate
      // never gets called


      options._ssrRegister = hook;
    } else if (style) {
      hook = shadowMode ? function (context) {
        style.call(this, createInjectorShadow(context, this.$root.$options.shadowRoot));
      } : function (context) {
        style.call(this, createInjector(context));
      };
    }

    if (hook) {
      if (options.functional) {
        // register for functional component in vue file
        var originalRender = options.render;

        options.render = function renderWithStyleInjection(h, context) {
          hook.call(context);
          return originalRender(h, context);
        };
      } else {
        // inject component registration as beforeCreate hook
        var existing = options.beforeCreate;
        options.beforeCreate = existing ? [].concat(existing, hook) : [hook];
      }
    }

    return script;
  }

  /* script */
  var __vue_script__$1 = script$1;
  /* template */

  var __vue_render__$1 = function __vue_render__() {
    var _vm = this;

    var _h = _vm.$createElement;

    var _c = _vm._self._c || _h;

    return _c("div", {
      staticClass: "resize-observer",
      attrs: {
        tabindex: "-1"
      }
    });
  };

  var __vue_staticRenderFns__$1 = [];
  __vue_render__$1._withStripped = true;
  /* style */

  var __vue_inject_styles__$1 = undefined;
  /* scoped */

  var __vue_scope_id__$1 = "data-v-8859cc6c";
  /* module identifier */

  var __vue_module_identifier__$1 = undefined;
  /* functional template */

  var __vue_is_functional_template__$1 = false;
  /* style inject */

  /* style inject SSR */

  /* style inject shadow dom */

  var __vue_component__$1 = /*#__PURE__*/normalizeComponent$1({
    render: __vue_render__$1,
    staticRenderFns: __vue_staticRenderFns__$1
  }, __vue_inject_styles__$1, __vue_script__$1, __vue_scope_id__$1, __vue_is_functional_template__$1, __vue_module_identifier__$1, false, undefined, undefined, undefined);

  function install$1(Vue) {
    // eslint-disable-next-line vue/component-definition-name-casing
    Vue.component('resize-observer', __vue_component__$1);
    Vue.component('ResizeObserver', __vue_component__$1);
  }

  var plugin$1 = {
    // eslint-disable-next-line no-undef
    version: "1.0.1",
    install: install$1
  };

  var GlobalVue$1 = null;

  if (typeof window !== 'undefined') {
    GlobalVue$1 = window.Vue;
  } else if (typeof global !== 'undefined') {
    GlobalVue$1 = global.Vue;
  }

  if (GlobalVue$1) {
    GlobalVue$1.use(plugin$1);
  }

  function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); if (enumerableOnly) symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; }); keys.push.apply(keys, symbols); } return keys; }

  function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; if (i % 2) { ownKeys(Object(source), true).forEach(function (key) { _defineProperty$1(target, key, source[key]); }); } else if (Object.getOwnPropertyDescriptors) { Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)); } else { ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } } return target; }

  function getDefault(key) {
    var value = directive.options.popover[key];

    if (typeof value === 'undefined') {
      return directive.options[key];
    }

    return value;
  }

  var isIOS = false;

  if (typeof window !== 'undefined' && typeof navigator !== 'undefined') {
    isIOS = /iPad|iPhone|iPod/.test(navigator.userAgent) && !window.MSStream;
  }

  var openPopovers = [];

  var Element = function Element() {};

  if (typeof window !== 'undefined') {
    Element = window.Element;
  }

  var script = {
    name: 'VPopover',
    components: {
      ResizeObserver: __vue_component__$1
    },
    props: {
      open: {
        type: Boolean,
        default: false
      },
      disabled: {
        type: Boolean,
        default: false
      },
      placement: {
        type: String,
        default: function _default() {
          return getDefault('defaultPlacement');
        }
      },
      delay: {
        type: [String, Number, Object],
        default: function _default() {
          return getDefault('defaultDelay');
        }
      },
      offset: {
        type: [String, Number],
        default: function _default() {
          return getDefault('defaultOffset');
        }
      },
      trigger: {
        type: String,
        default: function _default() {
          return getDefault('defaultTrigger');
        }
      },
      container: {
        type: [String, Object, Element, Boolean],
        default: function _default() {
          return getDefault('defaultContainer');
        }
      },
      boundariesElement: {
        type: [String, Element],
        default: function _default() {
          return getDefault('defaultBoundariesElement');
        }
      },
      popperOptions: {
        type: Object,
        default: function _default() {
          return getDefault('defaultPopperOptions');
        }
      },
      popoverClass: {
        type: [String, Array],
        default: function _default() {
          return getDefault('defaultClass');
        }
      },
      popoverBaseClass: {
        type: [String, Array],
        default: function _default() {
          return directive.options.popover.defaultBaseClass;
        }
      },
      popoverInnerClass: {
        type: [String, Array],
        default: function _default() {
          return directive.options.popover.defaultInnerClass;
        }
      },
      popoverWrapperClass: {
        type: [String, Array],
        default: function _default() {
          return directive.options.popover.defaultWrapperClass;
        }
      },
      popoverArrowClass: {
        type: [String, Array],
        default: function _default() {
          return directive.options.popover.defaultArrowClass;
        }
      },
      autoHide: {
        type: Boolean,
        default: function _default() {
          return directive.options.popover.defaultAutoHide;
        }
      },
      handleResize: {
        type: Boolean,
        default: function _default() {
          return directive.options.popover.defaultHandleResize;
        }
      },
      openGroup: {
        type: String,
        default: null
      },
      openClass: {
        type: [String, Array],
        default: function _default() {
          return directive.options.popover.defaultOpenClass;
        }
      },
      ariaId: {
        default: null
      }
    },
    data: function data() {
      return {
        isOpen: false,
        id: Math.random().toString(36).substr(2, 10)
      };
    },
    computed: {
      cssClass: function cssClass() {
        return _defineProperty$1({}, this.openClass, this.isOpen);
      },
      popoverId: function popoverId() {
        return "popover_".concat(this.ariaId != null ? this.ariaId : this.id);
      }
    },
    watch: {
      open: function open(val) {
        if (val) {
          this.show();
        } else {
          this.hide();
        }
      },
      disabled: function disabled(val, oldVal) {
        if (val !== oldVal) {
          if (val) {
            this.hide();
          } else if (this.open) {
            this.show();
          }
        }
      },
      container: function container(val) {
        if (this.isOpen && this.popperInstance) {
          var popoverNode = this.$refs.popover;
          var reference = this.$refs.trigger;
          var container = this.$_findContainer(this.container, reference);

          if (!container) {
            console.warn('No container for popover', this);
            return;
          }

          container.appendChild(popoverNode);
          this.popperInstance.scheduleUpdate();
        }
      },
      trigger: function trigger(val) {
        this.$_removeEventListeners();
        this.$_addEventListeners();
      },
      placement: function placement(val) {
        var _this = this;

        this.$_updatePopper(function () {
          _this.popperInstance.options.placement = val;
        });
      },
      offset: '$_restartPopper',
      boundariesElement: '$_restartPopper',
      popperOptions: {
        handler: '$_restartPopper',
        deep: true
      }
    },
    created: function created() {
      this.$_isDisposed = false;
      this.$_mounted = false;
      this.$_events = [];
      this.$_preventOpen = false;
    },
    mounted: function mounted() {
      var popoverNode = this.$refs.popover;
      popoverNode.parentNode && popoverNode.parentNode.removeChild(popoverNode);
      this.$_init();

      if (this.open) {
        this.show();
      }
    },
    deactivated: function deactivated() {
      this.hide();
    },
    beforeDestroy: function beforeDestroy() {
      this.dispose();
    },
    methods: {
      show: function show() {
        var _this2 = this;

        var _ref2 = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {},
            event = _ref2.event;
            _ref2.skipDelay;
            var _ref2$force = _ref2.force,
            force = _ref2$force === void 0 ? false : _ref2$force;

        if (force || !this.disabled) {
          this.$_scheduleShow(event);
          this.$emit('show');
        }

        this.$emit('update:open', true);
        this.$_beingShowed = true;
        requestAnimationFrame(function () {
          _this2.$_beingShowed = false;
        });
      },
      hide: function hide() {
        var _ref3 = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {},
            event = _ref3.event;
            _ref3.skipDelay;

        this.$_scheduleHide(event);
        this.$emit('hide');
        this.$emit('update:open', false);
      },
      dispose: function dispose() {
        this.$_isDisposed = true;
        this.$_removeEventListeners();
        this.hide({
          skipDelay: true
        });

        if (this.popperInstance) {
          this.popperInstance.destroy(); // destroy tooltipNode if removeOnDestroy is not set, as popperInstance.destroy() already removes the element

          if (!this.popperInstance.options.removeOnDestroy) {
            var popoverNode = this.$refs.popover;
            popoverNode.parentNode && popoverNode.parentNode.removeChild(popoverNode);
          }
        }

        this.$_mounted = false;
        this.popperInstance = null;
        this.isOpen = false;
        this.$emit('dispose');
      },
      $_init: function $_init() {
        if (this.trigger.indexOf('manual') === -1) {
          this.$_addEventListeners();
        }
      },
      $_show: function $_show() {
        var _this3 = this;

        var reference = this.$refs.trigger;
        var popoverNode = this.$refs.popover;
        clearTimeout(this.$_disposeTimer); // Already open

        if (this.isOpen) {
          return;
        } // Popper is already initialized


        if (this.popperInstance) {
          this.isOpen = true;
          this.popperInstance.enableEventListeners();
          this.popperInstance.scheduleUpdate();
        }

        if (!this.$_mounted) {
          var container = this.$_findContainer(this.container, reference);

          if (!container) {
            console.warn('No container for popover', this);
            return;
          }

          container.appendChild(popoverNode);
          this.$_mounted = true;
          this.isOpen = false;

          if (this.popperInstance) {
            requestAnimationFrame(function () {
              if (!_this3.hidden) {
                _this3.isOpen = true;
              }
            });
          }
        }

        if (!this.popperInstance) {
          var popperOptions = _objectSpread(_objectSpread({}, this.popperOptions), {}, {
            placement: this.placement
          });

          popperOptions.modifiers = _objectSpread(_objectSpread({}, popperOptions.modifiers), {}, {
            arrow: _objectSpread(_objectSpread({}, popperOptions.modifiers && popperOptions.modifiers.arrow), {}, {
              element: this.$refs.arrow
            })
          });

          if (this.offset) {
            var offset = this.$_getOffset();
            popperOptions.modifiers.offset = _objectSpread(_objectSpread({}, popperOptions.modifiers && popperOptions.modifiers.offset), {}, {
              offset: offset
            });
          }

          if (this.boundariesElement) {
            popperOptions.modifiers.preventOverflow = _objectSpread(_objectSpread({}, popperOptions.modifiers && popperOptions.modifiers.preventOverflow), {}, {
              boundariesElement: this.boundariesElement
            });
          }

          this.popperInstance = new Popper(reference, popoverNode, popperOptions); // Fix position

          requestAnimationFrame(function () {
            if (_this3.hidden) {
              _this3.hidden = false;

              _this3.$_hide();

              return;
            }

            if (!_this3.$_isDisposed && _this3.popperInstance) {
              _this3.popperInstance.scheduleUpdate(); // Show the tooltip


              requestAnimationFrame(function () {
                if (_this3.hidden) {
                  _this3.hidden = false;

                  _this3.$_hide();

                  return;
                }

                if (!_this3.$_isDisposed) {
                  _this3.isOpen = true;
                } else {
                  _this3.dispose();
                }
              });
            } else {
              _this3.dispose();
            }
          });
        }

        var openGroup = this.openGroup;

        if (openGroup) {
          var popover;

          for (var i = 0; i < openPopovers.length; i++) {
            popover = openPopovers[i];

            if (popover.openGroup !== openGroup) {
              popover.hide();
              popover.$emit('close-group');
            }
          }
        }

        openPopovers.push(this);
        this.$emit('apply-show');
      },
      $_hide: function $_hide() {
        var _this4 = this;

        // Already hidden
        if (!this.isOpen) {
          return;
        }

        var index = openPopovers.indexOf(this);

        if (index !== -1) {
          openPopovers.splice(index, 1);
        }

        this.isOpen = false;

        if (this.popperInstance) {
          this.popperInstance.disableEventListeners();
        }

        clearTimeout(this.$_disposeTimer);
        var disposeTime = directive.options.popover.disposeTimeout || directive.options.disposeTimeout;

        if (disposeTime !== null) {
          this.$_disposeTimer = setTimeout(function () {
            var popoverNode = _this4.$refs.popover;

            if (popoverNode) {
              // Don't remove popper instance, just the HTML element
              popoverNode.parentNode && popoverNode.parentNode.removeChild(popoverNode);
              _this4.$_mounted = false;
            }
          }, disposeTime);
        }

        this.$emit('apply-hide');
      },
      $_findContainer: function $_findContainer(container, reference) {
        // if container is a query, get the relative element
        if (typeof container === 'string') {
          container = window.document.querySelector(container);
        } else if (container === false) {
          // if container is `false`, set it to reference parent
          container = reference.parentNode;
        }

        return container;
      },
      $_getOffset: function $_getOffset() {
        var typeofOffset = _typeof(this.offset);

        var offset = this.offset; // One value -> switch

        if (typeofOffset === 'number' || typeofOffset === 'string' && offset.indexOf(',') === -1) {
          offset = "0, ".concat(offset);
        }

        return offset;
      },
      $_addEventListeners: function $_addEventListeners() {
        var _this5 = this;

        var reference = this.$refs.trigger;
        var directEvents = [];
        var oppositeEvents = [];
        var events = typeof this.trigger === 'string' ? this.trigger.split(' ').filter(function (trigger) {
          return ['click', 'hover', 'focus'].indexOf(trigger) !== -1;
        }) : [];
        events.forEach(function (event) {
          switch (event) {
            case 'hover':
              directEvents.push('mouseenter');
              oppositeEvents.push('mouseleave');
              break;

            case 'focus':
              directEvents.push('focus');
              oppositeEvents.push('blur');
              break;

            case 'click':
              directEvents.push('click');
              oppositeEvents.push('click');
              break;
          }
        }); // schedule show tooltip

        directEvents.forEach(function (event) {
          var func = function func(event) {
            if (_this5.isOpen) {
              return;
            }

            event.usedByTooltip = true;
            !_this5.$_preventOpen && _this5.show({
              event: event
            });
            _this5.hidden = false;
          };

          _this5.$_events.push({
            event: event,
            func: func
          });

          reference.addEventListener(event, func);
        }); // schedule hide tooltip

        oppositeEvents.forEach(function (event) {
          var func = function func(event) {
            if (event.usedByTooltip) {
              return;
            }

            _this5.hide({
              event: event
            });

            _this5.hidden = true;
          };

          _this5.$_events.push({
            event: event,
            func: func
          });

          reference.addEventListener(event, func);
        });
      },
      $_scheduleShow: function $_scheduleShow() {
        var skipDelay = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;
        clearTimeout(this.$_scheduleTimer);

        if (skipDelay) {
          this.$_show();
        } else {
          // defaults to 0
          var computedDelay = parseInt(this.delay && this.delay.show || this.delay || 0);
          this.$_scheduleTimer = setTimeout(this.$_show.bind(this), computedDelay);
        }
      },
      $_scheduleHide: function $_scheduleHide() {
        var _this6 = this;

        var event = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : null;
        var skipDelay = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;
        clearTimeout(this.$_scheduleTimer);

        if (skipDelay) {
          this.$_hide();
        } else {
          // defaults to 0
          var computedDelay = parseInt(this.delay && this.delay.hide || this.delay || 0);
          this.$_scheduleTimer = setTimeout(function () {
            if (!_this6.isOpen) {
              return;
            } // if we are hiding because of a mouseleave, we must check that the new
            // reference isn't the tooltip, because in this case we don't want to hide it


            if (event && event.type === 'mouseleave') {
              var isSet = _this6.$_setTooltipNodeEvent(event); // if we set the new event, don't hide the tooltip yet
              // the new event will take care to hide it if necessary


              if (isSet) {
                return;
              }
            }

            _this6.$_hide();
          }, computedDelay);
        }
      },
      $_setTooltipNodeEvent: function $_setTooltipNodeEvent(event) {
        var _this7 = this;

        var reference = this.$refs.trigger;
        var popoverNode = this.$refs.popover;
        var relatedreference = event.relatedreference || event.toElement || event.relatedTarget;

        var callback = function callback(event2) {
          var relatedreference2 = event2.relatedreference || event2.toElement || event2.relatedTarget; // Remove event listener after call

          popoverNode.removeEventListener(event.type, callback); // If the new reference is not the reference element

          if (!reference.contains(relatedreference2)) {
            // Schedule to hide tooltip
            _this7.hide({
              event: event2
            });
          }
        };

        if (popoverNode.contains(relatedreference)) {
          // listen to mouseleave on the tooltip element to be able to hide the tooltip
          popoverNode.addEventListener(event.type, callback);
          return true;
        }

        return false;
      },
      $_removeEventListeners: function $_removeEventListeners() {
        var reference = this.$refs.trigger;
        this.$_events.forEach(function (_ref4) {
          var func = _ref4.func,
              event = _ref4.event;
          reference.removeEventListener(event, func);
        });
        this.$_events = [];
      },
      $_updatePopper: function $_updatePopper(cb) {
        if (this.popperInstance) {
          cb();
          if (this.isOpen) this.popperInstance.scheduleUpdate();
        }
      },
      $_restartPopper: function $_restartPopper() {
        if (this.popperInstance) {
          var isOpen = this.isOpen;
          this.dispose();
          this.$_isDisposed = false;
          this.$_init();

          if (isOpen) {
            this.show({
              skipDelay: true,
              force: true
            });
          }
        }
      },
      $_handleGlobalClose: function $_handleGlobalClose(event) {
        var _this8 = this;

        var touch = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;
        if (this.$_beingShowed) return;
        this.hide({
          event: event
        });

        if (event.closePopover) {
          this.$emit('close-directive');
        } else {
          this.$emit('auto-hide');
        }

        if (touch) {
          this.$_preventOpen = true;
          setTimeout(function () {
            _this8.$_preventOpen = false;
          }, 300);
        }
      },
      $_handleResize: function $_handleResize() {
        if (this.isOpen && this.popperInstance) {
          this.popperInstance.scheduleUpdate();
          this.$emit('resize');
        }
      }
    }
  };

  if (typeof document !== 'undefined' && typeof window !== 'undefined') {
    if (isIOS) {
      document.addEventListener('touchend', handleGlobalTouchend, supportsPassive ? {
        passive: true,
        capture: true
      } : true);
    } else {
      window.addEventListener('click', handleGlobalClick, true);
    }
  }

  function handleGlobalClick(event) {
    handleGlobalClose(event);
  }

  function handleGlobalTouchend(event) {
    handleGlobalClose(event, true);
  }

  function handleGlobalClose(event) {
    var touch = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;

    var _loop = function _loop(i) {
      var popover = openPopovers[i];

      if (popover.$refs.popover) {
        var contains = popover.$refs.popover.contains(event.target);
        requestAnimationFrame(function () {
          if (event.closeAllPopover || event.closePopover && contains || popover.autoHide && !contains) {
            popover.$_handleGlobalClose(event, touch);
          }
        });
      }
    };

    // Delay so that close directive has time to set values
    for (var i = 0; i < openPopovers.length; i++) {
      _loop(i);
    }
  }

  function normalizeComponent(template, style, script, scopeId, isFunctionalTemplate, moduleIdentifier /* server only */, shadowMode, createInjector, createInjectorSSR, createInjectorShadow) {
      if (typeof shadowMode !== 'boolean') {
          createInjectorSSR = createInjector;
          createInjector = shadowMode;
          shadowMode = false;
      }
      // Vue.extend constructor export interop.
      const options = typeof script === 'function' ? script.options : script;
      // render functions
      if (template && template.render) {
          options.render = template.render;
          options.staticRenderFns = template.staticRenderFns;
          options._compiled = true;
          // functional template
          if (isFunctionalTemplate) {
              options.functional = true;
          }
      }
      // scopedId
      if (scopeId) {
          options._scopeId = scopeId;
      }
      let hook;
      if (moduleIdentifier) {
          // server build
          hook = function (context) {
              // 2.3 injection
              context =
                  context || // cached call
                      (this.$vnode && this.$vnode.ssrContext) || // stateful
                      (this.parent && this.parent.$vnode && this.parent.$vnode.ssrContext); // functional
              // 2.2 with runInNewContext: true
              if (!context && typeof __VUE_SSR_CONTEXT__ !== 'undefined') {
                  context = __VUE_SSR_CONTEXT__;
              }
              // inject component styles
              if (style) {
                  style.call(this, createInjectorSSR(context));
              }
              // register component module identifier for async chunk inference
              if (context && context._registeredComponents) {
                  context._registeredComponents.add(moduleIdentifier);
              }
          };
          // used by ssr in case component is cached and beforeCreate
          // never gets called
          options._ssrRegister = hook;
      }
      else if (style) {
          hook = shadowMode
              ? function (context) {
                  style.call(this, createInjectorShadow(context, this.$root.$options.shadowRoot));
              }
              : function (context) {
                  style.call(this, createInjector(context));
              };
      }
      if (hook) {
          if (options.functional) {
              // register for functional component in vue file
              const originalRender = options.render;
              options.render = function renderWithStyleInjection(h, context) {
                  hook.call(context);
                  return originalRender(h, context);
              };
          }
          else {
              // inject component registration as beforeCreate hook
              const existing = options.beforeCreate;
              options.beforeCreate = existing ? [].concat(existing, hook) : [hook];
          }
      }
      return script;
  }

  /* script */
  var __vue_script__ = script;
  /* template */

  var __vue_render__ = function __vue_render__() {
    var _vm = this;

    var _h = _vm.$createElement;

    var _c = _vm._self._c || _h;

    return _c("div", {
      staticClass: "v-popover",
      class: _vm.cssClass
    }, [_c("div", {
      ref: "trigger",
      staticClass: "trigger",
      staticStyle: {
        display: "inline-block"
      },
      attrs: {
        "aria-describedby": _vm.isOpen ? _vm.popoverId : undefined,
        tabindex: _vm.trigger.indexOf("focus") !== -1 ? 0 : undefined
      }
    }, [_vm._t("default")], 2), _vm._v(" "), _c("div", {
      ref: "popover",
      class: [_vm.popoverBaseClass, _vm.popoverClass, _vm.cssClass],
      style: {
        visibility: _vm.isOpen ? "visible" : "hidden"
      },
      attrs: {
        id: _vm.popoverId,
        "aria-hidden": _vm.isOpen ? "false" : "true",
        tabindex: _vm.autoHide ? 0 : undefined
      },
      on: {
        keyup: function keyup($event) {
          if (!$event.type.indexOf("key") && _vm._k($event.keyCode, "esc", 27, $event.key, ["Esc", "Escape"])) {
            return null;
          }

          _vm.autoHide && _vm.hide();
        }
      }
    }, [_c("div", {
      class: _vm.popoverWrapperClass
    }, [_c("div", {
      ref: "inner",
      class: _vm.popoverInnerClass,
      staticStyle: {
        position: "relative"
      }
    }, [_c("div", [_vm._t("popover", null, {
      isOpen: _vm.isOpen
    })], 2), _vm._v(" "), _vm.handleResize ? _c("ResizeObserver", {
      on: {
        notify: _vm.$_handleResize
      }
    }) : _vm._e()], 1), _vm._v(" "), _c("div", {
      ref: "arrow",
      class: _vm.popoverArrowClass
    })])])]);
  };

  var __vue_staticRenderFns__ = [];
  __vue_render__._withStripped = true;
  /* style */

  var __vue_inject_styles__ = undefined;
  /* scoped */

  var __vue_scope_id__ = undefined;
  /* module identifier */

  var __vue_module_identifier__ = undefined;
  /* functional template */

  var __vue_is_functional_template__ = false;
  /* style inject */

  /* style inject SSR */

  /* style inject shadow dom */

  var __vue_component__ = /*#__PURE__*/normalizeComponent({
    render: __vue_render__,
    staticRenderFns: __vue_staticRenderFns__
  }, __vue_inject_styles__, __vue_script__, __vue_scope_id__, __vue_is_functional_template__, __vue_module_identifier__, false, undefined, undefined, undefined);

  var defineProperty = (function() {
    try {
      var func = _getNative(Object, 'defineProperty');
      func({}, '', {});
      return func;
    } catch (e) {}
  }());

  var _defineProperty = defineProperty;

  /**
   * The base implementation of `assignValue` and `assignMergeValue` without
   * value checks.
   *
   * @private
   * @param {Object} object The object to modify.
   * @param {string} key The key of the property to assign.
   * @param {*} value The value to assign.
   */
  function baseAssignValue(object, key, value) {
    if (key == '__proto__' && _defineProperty) {
      _defineProperty(object, key, {
        'configurable': true,
        'enumerable': true,
        'value': value,
        'writable': true
      });
    } else {
      object[key] = value;
    }
  }

  var _baseAssignValue = baseAssignValue;

  /**
   * This function is like `assignValue` except that it doesn't assign
   * `undefined` values.
   *
   * @private
   * @param {Object} object The object to modify.
   * @param {string} key The key of the property to assign.
   * @param {*} value The value to assign.
   */
  function assignMergeValue(object, key, value) {
    if ((value !== undefined && !eq_1(object[key], value)) ||
        (value === undefined && !(key in object))) {
      _baseAssignValue(object, key, value);
    }
  }

  var _assignMergeValue = assignMergeValue;

  /**
   * Creates a base function for methods like `_.forIn` and `_.forOwn`.
   *
   * @private
   * @param {boolean} [fromRight] Specify iterating from right to left.
   * @returns {Function} Returns the new base function.
   */
  function createBaseFor(fromRight) {
    return function(object, iteratee, keysFunc) {
      var index = -1,
          iterable = Object(object),
          props = keysFunc(object),
          length = props.length;

      while (length--) {
        var key = props[fromRight ? length : ++index];
        if (iteratee(iterable[key], key, iterable) === false) {
          break;
        }
      }
      return object;
    };
  }

  var _createBaseFor = createBaseFor;

  /**
   * The base implementation of `baseForOwn` which iterates over `object`
   * properties returned by `keysFunc` and invokes `iteratee` for each property.
   * Iteratee functions may exit iteration early by explicitly returning `false`.
   *
   * @private
   * @param {Object} object The object to iterate over.
   * @param {Function} iteratee The function invoked per iteration.
   * @param {Function} keysFunc The function to get the keys of `object`.
   * @returns {Object} Returns `object`.
   */
  var baseFor = _createBaseFor();

  var _baseFor = baseFor;

  var _cloneBuffer = createCommonjsModule(function (module, exports) {
  /** Detect free variable `exports`. */
  var freeExports = exports && !exports.nodeType && exports;

  /** Detect free variable `module`. */
  var freeModule = freeExports && 'object' == 'object' && module && !module.nodeType && module;

  /** Detect the popular CommonJS extension `module.exports`. */
  var moduleExports = freeModule && freeModule.exports === freeExports;

  /** Built-in value references. */
  var Buffer = moduleExports ? _root.Buffer : undefined,
      allocUnsafe = Buffer ? Buffer.allocUnsafe : undefined;

  /**
   * Creates a clone of  `buffer`.
   *
   * @private
   * @param {Buffer} buffer The buffer to clone.
   * @param {boolean} [isDeep] Specify a deep clone.
   * @returns {Buffer} Returns the cloned buffer.
   */
  function cloneBuffer(buffer, isDeep) {
    if (isDeep) {
      return buffer.slice();
    }
    var length = buffer.length,
        result = allocUnsafe ? allocUnsafe(length) : new buffer.constructor(length);

    buffer.copy(result);
    return result;
  }

  module.exports = cloneBuffer;
  });

  /**
   * Creates a clone of `arrayBuffer`.
   *
   * @private
   * @param {ArrayBuffer} arrayBuffer The array buffer to clone.
   * @returns {ArrayBuffer} Returns the cloned array buffer.
   */
  function cloneArrayBuffer(arrayBuffer) {
    var result = new arrayBuffer.constructor(arrayBuffer.byteLength);
    new _Uint8Array(result).set(new _Uint8Array(arrayBuffer));
    return result;
  }

  var _cloneArrayBuffer = cloneArrayBuffer;

  /**
   * Creates a clone of `typedArray`.
   *
   * @private
   * @param {Object} typedArray The typed array to clone.
   * @param {boolean} [isDeep] Specify a deep clone.
   * @returns {Object} Returns the cloned typed array.
   */
  function cloneTypedArray(typedArray, isDeep) {
    var buffer = isDeep ? _cloneArrayBuffer(typedArray.buffer) : typedArray.buffer;
    return new typedArray.constructor(buffer, typedArray.byteOffset, typedArray.length);
  }

  var _cloneTypedArray = cloneTypedArray;

  /**
   * Copies the values of `source` to `array`.
   *
   * @private
   * @param {Array} source The array to copy values from.
   * @param {Array} [array=[]] The array to copy values to.
   * @returns {Array} Returns `array`.
   */
  function copyArray(source, array) {
    var index = -1,
        length = source.length;

    array || (array = Array(length));
    while (++index < length) {
      array[index] = source[index];
    }
    return array;
  }

  var _copyArray = copyArray;

  /** Built-in value references. */
  var objectCreate = Object.create;

  /**
   * The base implementation of `_.create` without support for assigning
   * properties to the created object.
   *
   * @private
   * @param {Object} proto The object to inherit from.
   * @returns {Object} Returns the new object.
   */
  var baseCreate = (function() {
    function object() {}
    return function(proto) {
      if (!isObject_1(proto)) {
        return {};
      }
      if (objectCreate) {
        return objectCreate(proto);
      }
      object.prototype = proto;
      var result = new object;
      object.prototype = undefined;
      return result;
    };
  }());

  var _baseCreate = baseCreate;

  /** Built-in value references. */
  var getPrototype = _overArg(Object.getPrototypeOf, Object);

  var _getPrototype = getPrototype;

  /**
   * Initializes an object clone.
   *
   * @private
   * @param {Object} object The object to clone.
   * @returns {Object} Returns the initialized clone.
   */
  function initCloneObject(object) {
    return (typeof object.constructor == 'function' && !_isPrototype(object))
      ? _baseCreate(_getPrototype(object))
      : {};
  }

  var _initCloneObject = initCloneObject;

  /**
   * This method is like `_.isArrayLike` except that it also checks if `value`
   * is an object.
   *
   * @static
   * @memberOf _
   * @since 4.0.0
   * @category Lang
   * @param {*} value The value to check.
   * @returns {boolean} Returns `true` if `value` is an array-like object,
   *  else `false`.
   * @example
   *
   * _.isArrayLikeObject([1, 2, 3]);
   * // => true
   *
   * _.isArrayLikeObject(document.body.children);
   * // => true
   *
   * _.isArrayLikeObject('abc');
   * // => false
   *
   * _.isArrayLikeObject(_.noop);
   * // => false
   */
  function isArrayLikeObject(value) {
    return isObjectLike_1(value) && isArrayLike_1(value);
  }

  var isArrayLikeObject_1 = isArrayLikeObject;

  /** `Object#toString` result references. */
  var objectTag = '[object Object]';

  /** Used for built-in method references. */
  var funcProto = Function.prototype,
      objectProto$2 = Object.prototype;

  /** Used to resolve the decompiled source of functions. */
  var funcToString = funcProto.toString;

  /** Used to check objects for own properties. */
  var hasOwnProperty$2 = objectProto$2.hasOwnProperty;

  /** Used to infer the `Object` constructor. */
  var objectCtorString = funcToString.call(Object);

  /**
   * Checks if `value` is a plain object, that is, an object created by the
   * `Object` constructor or one with a `[[Prototype]]` of `null`.
   *
   * @static
   * @memberOf _
   * @since 0.8.0
   * @category Lang
   * @param {*} value The value to check.
   * @returns {boolean} Returns `true` if `value` is a plain object, else `false`.
   * @example
   *
   * function Foo() {
   *   this.a = 1;
   * }
   *
   * _.isPlainObject(new Foo);
   * // => false
   *
   * _.isPlainObject([1, 2, 3]);
   * // => false
   *
   * _.isPlainObject({ 'x': 0, 'y': 0 });
   * // => true
   *
   * _.isPlainObject(Object.create(null));
   * // => true
   */
  function isPlainObject(value) {
    if (!isObjectLike_1(value) || _baseGetTag(value) != objectTag) {
      return false;
    }
    var proto = _getPrototype(value);
    if (proto === null) {
      return true;
    }
    var Ctor = hasOwnProperty$2.call(proto, 'constructor') && proto.constructor;
    return typeof Ctor == 'function' && Ctor instanceof Ctor &&
      funcToString.call(Ctor) == objectCtorString;
  }

  var isPlainObject_1 = isPlainObject;

  /**
   * Gets the value at `key`, unless `key` is "__proto__" or "constructor".
   *
   * @private
   * @param {Object} object The object to query.
   * @param {string} key The key of the property to get.
   * @returns {*} Returns the property value.
   */
  function safeGet(object, key) {
    if (key === 'constructor' && typeof object[key] === 'function') {
      return;
    }

    if (key == '__proto__') {
      return;
    }

    return object[key];
  }

  var _safeGet = safeGet;

  /** Used for built-in method references. */
  var objectProto$1 = Object.prototype;

  /** Used to check objects for own properties. */
  var hasOwnProperty$1 = objectProto$1.hasOwnProperty;

  /**
   * Assigns `value` to `key` of `object` if the existing value is not equivalent
   * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
   * for equality comparisons.
   *
   * @private
   * @param {Object} object The object to modify.
   * @param {string} key The key of the property to assign.
   * @param {*} value The value to assign.
   */
  function assignValue(object, key, value) {
    var objValue = object[key];
    if (!(hasOwnProperty$1.call(object, key) && eq_1(objValue, value)) ||
        (value === undefined && !(key in object))) {
      _baseAssignValue(object, key, value);
    }
  }

  var _assignValue = assignValue;

  /**
   * Copies properties of `source` to `object`.
   *
   * @private
   * @param {Object} source The object to copy properties from.
   * @param {Array} props The property identifiers to copy.
   * @param {Object} [object={}] The object to copy properties to.
   * @param {Function} [customizer] The function to customize copied values.
   * @returns {Object} Returns `object`.
   */
  function copyObject(source, props, object, customizer) {
    var isNew = !object;
    object || (object = {});

    var index = -1,
        length = props.length;

    while (++index < length) {
      var key = props[index];

      var newValue = customizer
        ? customizer(object[key], source[key], key, object, source)
        : undefined;

      if (newValue === undefined) {
        newValue = source[key];
      }
      if (isNew) {
        _baseAssignValue(object, key, newValue);
      } else {
        _assignValue(object, key, newValue);
      }
    }
    return object;
  }

  var _copyObject = copyObject;

  /**
   * This function is like
   * [`Object.keys`](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
   * except that it includes inherited enumerable properties.
   *
   * @private
   * @param {Object} object The object to query.
   * @returns {Array} Returns the array of property names.
   */
  function nativeKeysIn(object) {
    var result = [];
    if (object != null) {
      for (var key in Object(object)) {
        result.push(key);
      }
    }
    return result;
  }

  var _nativeKeysIn = nativeKeysIn;

  /** Used for built-in method references. */
  var objectProto = Object.prototype;

  /** Used to check objects for own properties. */
  var hasOwnProperty = objectProto.hasOwnProperty;

  /**
   * The base implementation of `_.keysIn` which doesn't treat sparse arrays as dense.
   *
   * @private
   * @param {Object} object The object to query.
   * @returns {Array} Returns the array of property names.
   */
  function baseKeysIn(object) {
    if (!isObject_1(object)) {
      return _nativeKeysIn(object);
    }
    var isProto = _isPrototype(object),
        result = [];

    for (var key in object) {
      if (!(key == 'constructor' && (isProto || !hasOwnProperty.call(object, key)))) {
        result.push(key);
      }
    }
    return result;
  }

  var _baseKeysIn = baseKeysIn;

  /**
   * Creates an array of the own and inherited enumerable property names of `object`.
   *
   * **Note:** Non-object values are coerced to objects.
   *
   * @static
   * @memberOf _
   * @since 3.0.0
   * @category Object
   * @param {Object} object The object to query.
   * @returns {Array} Returns the array of property names.
   * @example
   *
   * function Foo() {
   *   this.a = 1;
   *   this.b = 2;
   * }
   *
   * Foo.prototype.c = 3;
   *
   * _.keysIn(new Foo);
   * // => ['a', 'b', 'c'] (iteration order is not guaranteed)
   */
  function keysIn(object) {
    return isArrayLike_1(object) ? _arrayLikeKeys(object, true) : _baseKeysIn(object);
  }

  var keysIn_1 = keysIn;

  /**
   * Converts `value` to a plain object flattening inherited enumerable string
   * keyed properties of `value` to own properties of the plain object.
   *
   * @static
   * @memberOf _
   * @since 3.0.0
   * @category Lang
   * @param {*} value The value to convert.
   * @returns {Object} Returns the converted plain object.
   * @example
   *
   * function Foo() {
   *   this.b = 2;
   * }
   *
   * Foo.prototype.c = 3;
   *
   * _.assign({ 'a': 1 }, new Foo);
   * // => { 'a': 1, 'b': 2 }
   *
   * _.assign({ 'a': 1 }, _.toPlainObject(new Foo));
   * // => { 'a': 1, 'b': 2, 'c': 3 }
   */
  function toPlainObject(value) {
    return _copyObject(value, keysIn_1(value));
  }

  var toPlainObject_1 = toPlainObject;

  /**
   * A specialized version of `baseMerge` for arrays and objects which performs
   * deep merges and tracks traversed objects enabling objects with circular
   * references to be merged.
   *
   * @private
   * @param {Object} object The destination object.
   * @param {Object} source The source object.
   * @param {string} key The key of the value to merge.
   * @param {number} srcIndex The index of `source`.
   * @param {Function} mergeFunc The function to merge values.
   * @param {Function} [customizer] The function to customize assigned values.
   * @param {Object} [stack] Tracks traversed source values and their merged
   *  counterparts.
   */
  function baseMergeDeep(object, source, key, srcIndex, mergeFunc, customizer, stack) {
    var objValue = _safeGet(object, key),
        srcValue = _safeGet(source, key),
        stacked = stack.get(srcValue);

    if (stacked) {
      _assignMergeValue(object, key, stacked);
      return;
    }
    var newValue = customizer
      ? customizer(objValue, srcValue, (key + ''), object, source, stack)
      : undefined;

    var isCommon = newValue === undefined;

    if (isCommon) {
      var isArr = isArray_1(srcValue),
          isBuff = !isArr && isBuffer_1(srcValue),
          isTyped = !isArr && !isBuff && isTypedArray_1(srcValue);

      newValue = srcValue;
      if (isArr || isBuff || isTyped) {
        if (isArray_1(objValue)) {
          newValue = objValue;
        }
        else if (isArrayLikeObject_1(objValue)) {
          newValue = _copyArray(objValue);
        }
        else if (isBuff) {
          isCommon = false;
          newValue = _cloneBuffer(srcValue, true);
        }
        else if (isTyped) {
          isCommon = false;
          newValue = _cloneTypedArray(srcValue, true);
        }
        else {
          newValue = [];
        }
      }
      else if (isPlainObject_1(srcValue) || isArguments_1(srcValue)) {
        newValue = objValue;
        if (isArguments_1(objValue)) {
          newValue = toPlainObject_1(objValue);
        }
        else if (!isObject_1(objValue) || isFunction_1(objValue)) {
          newValue = _initCloneObject(srcValue);
        }
      }
      else {
        isCommon = false;
      }
    }
    if (isCommon) {
      // Recursively merge objects and arrays (susceptible to call stack limits).
      stack.set(srcValue, newValue);
      mergeFunc(newValue, srcValue, srcIndex, customizer, stack);
      stack['delete'](srcValue);
    }
    _assignMergeValue(object, key, newValue);
  }

  var _baseMergeDeep = baseMergeDeep;

  /**
   * The base implementation of `_.merge` without support for multiple sources.
   *
   * @private
   * @param {Object} object The destination object.
   * @param {Object} source The source object.
   * @param {number} srcIndex The index of `source`.
   * @param {Function} [customizer] The function to customize merged values.
   * @param {Object} [stack] Tracks traversed source values and their merged
   *  counterparts.
   */
  function baseMerge(object, source, srcIndex, customizer, stack) {
    if (object === source) {
      return;
    }
    _baseFor(source, function(srcValue, key) {
      stack || (stack = new _Stack);
      if (isObject_1(srcValue)) {
        _baseMergeDeep(object, source, key, srcIndex, baseMerge, customizer, stack);
      }
      else {
        var newValue = customizer
          ? customizer(_safeGet(object, key), srcValue, (key + ''), object, source, stack)
          : undefined;

        if (newValue === undefined) {
          newValue = srcValue;
        }
        _assignMergeValue(object, key, newValue);
      }
    }, keysIn_1);
  }

  var _baseMerge = baseMerge;

  /**
   * This method returns the first argument it receives.
   *
   * @static
   * @since 0.1.0
   * @memberOf _
   * @category Util
   * @param {*} value Any value.
   * @returns {*} Returns `value`.
   * @example
   *
   * var object = { 'a': 1 };
   *
   * console.log(_.identity(object) === object);
   * // => true
   */
  function identity(value) {
    return value;
  }

  var identity_1 = identity;

  /**
   * A faster alternative to `Function#apply`, this function invokes `func`
   * with the `this` binding of `thisArg` and the arguments of `args`.
   *
   * @private
   * @param {Function} func The function to invoke.
   * @param {*} thisArg The `this` binding of `func`.
   * @param {Array} args The arguments to invoke `func` with.
   * @returns {*} Returns the result of `func`.
   */
  function apply(func, thisArg, args) {
    switch (args.length) {
      case 0: return func.call(thisArg);
      case 1: return func.call(thisArg, args[0]);
      case 2: return func.call(thisArg, args[0], args[1]);
      case 3: return func.call(thisArg, args[0], args[1], args[2]);
    }
    return func.apply(thisArg, args);
  }

  var _apply = apply;

  /* Built-in method references for those with the same name as other `lodash` methods. */
  var nativeMax = Math.max;

  /**
   * A specialized version of `baseRest` which transforms the rest array.
   *
   * @private
   * @param {Function} func The function to apply a rest parameter to.
   * @param {number} [start=func.length-1] The start position of the rest parameter.
   * @param {Function} transform The rest array transform.
   * @returns {Function} Returns the new function.
   */
  function overRest(func, start, transform) {
    start = nativeMax(start === undefined ? (func.length - 1) : start, 0);
    return function() {
      var args = arguments,
          index = -1,
          length = nativeMax(args.length - start, 0),
          array = Array(length);

      while (++index < length) {
        array[index] = args[start + index];
      }
      index = -1;
      var otherArgs = Array(start + 1);
      while (++index < start) {
        otherArgs[index] = args[index];
      }
      otherArgs[start] = transform(array);
      return _apply(func, this, otherArgs);
    };
  }

  var _overRest = overRest;

  /**
   * Creates a function that returns `value`.
   *
   * @static
   * @memberOf _
   * @since 2.4.0
   * @category Util
   * @param {*} value The value to return from the new function.
   * @returns {Function} Returns the new constant function.
   * @example
   *
   * var objects = _.times(2, _.constant({ 'a': 1 }));
   *
   * console.log(objects);
   * // => [{ 'a': 1 }, { 'a': 1 }]
   *
   * console.log(objects[0] === objects[1]);
   * // => true
   */
  function constant(value) {
    return function() {
      return value;
    };
  }

  var constant_1 = constant;

  /**
   * The base implementation of `setToString` without support for hot loop shorting.
   *
   * @private
   * @param {Function} func The function to modify.
   * @param {Function} string The `toString` result.
   * @returns {Function} Returns `func`.
   */
  var baseSetToString = !_defineProperty ? identity_1 : function(func, string) {
    return _defineProperty(func, 'toString', {
      'configurable': true,
      'enumerable': false,
      'value': constant_1(string),
      'writable': true
    });
  };

  var _baseSetToString = baseSetToString;

  /** Used to detect hot functions by number of calls within a span of milliseconds. */
  var HOT_COUNT = 800,
      HOT_SPAN = 16;

  /* Built-in method references for those with the same name as other `lodash` methods. */
  var nativeNow = Date.now;

  /**
   * Creates a function that'll short out and invoke `identity` instead
   * of `func` when it's called `HOT_COUNT` or more times in `HOT_SPAN`
   * milliseconds.
   *
   * @private
   * @param {Function} func The function to restrict.
   * @returns {Function} Returns the new shortable function.
   */
  function shortOut(func) {
    var count = 0,
        lastCalled = 0;

    return function() {
      var stamp = nativeNow(),
          remaining = HOT_SPAN - (stamp - lastCalled);

      lastCalled = stamp;
      if (remaining > 0) {
        if (++count >= HOT_COUNT) {
          return arguments[0];
        }
      } else {
        count = 0;
      }
      return func.apply(undefined, arguments);
    };
  }

  var _shortOut = shortOut;

  /**
   * Sets the `toString` method of `func` to return `string`.
   *
   * @private
   * @param {Function} func The function to modify.
   * @param {Function} string The `toString` result.
   * @returns {Function} Returns `func`.
   */
  var setToString = _shortOut(_baseSetToString);

  var _setToString = setToString;

  /**
   * The base implementation of `_.rest` which doesn't validate or coerce arguments.
   *
   * @private
   * @param {Function} func The function to apply a rest parameter to.
   * @param {number} [start=func.length-1] The start position of the rest parameter.
   * @returns {Function} Returns the new function.
   */
  function baseRest(func, start) {
    return _setToString(_overRest(func, start, identity_1), func + '');
  }

  var _baseRest = baseRest;

  /**
   * Checks if the given arguments are from an iteratee call.
   *
   * @private
   * @param {*} value The potential iteratee value argument.
   * @param {*} index The potential iteratee index or key argument.
   * @param {*} object The potential iteratee object argument.
   * @returns {boolean} Returns `true` if the arguments are from an iteratee call,
   *  else `false`.
   */
  function isIterateeCall(value, index, object) {
    if (!isObject_1(object)) {
      return false;
    }
    var type = typeof index;
    if (type == 'number'
          ? (isArrayLike_1(object) && _isIndex(index, object.length))
          : (type == 'string' && index in object)
        ) {
      return eq_1(object[index], value);
    }
    return false;
  }

  var _isIterateeCall = isIterateeCall;

  /**
   * Creates a function like `_.assign`.
   *
   * @private
   * @param {Function} assigner The function to assign values.
   * @returns {Function} Returns the new assigner function.
   */
  function createAssigner(assigner) {
    return _baseRest(function(object, sources) {
      var index = -1,
          length = sources.length,
          customizer = length > 1 ? sources[length - 1] : undefined,
          guard = length > 2 ? sources[2] : undefined;

      customizer = (assigner.length > 3 && typeof customizer == 'function')
        ? (length--, customizer)
        : undefined;

      if (guard && _isIterateeCall(sources[0], sources[1], guard)) {
        customizer = length < 3 ? undefined : customizer;
        length = 1;
      }
      object = Object(object);
      while (++index < length) {
        var source = sources[index];
        if (source) {
          assigner(object, source, index, customizer);
        }
      }
      return object;
    });
  }

  var _createAssigner = createAssigner;

  /**
   * This method is like `_.assign` except that it recursively merges own and
   * inherited enumerable string keyed properties of source objects into the
   * destination object. Source properties that resolve to `undefined` are
   * skipped if a destination value exists. Array and plain object properties
   * are merged recursively. Other objects and value types are overridden by
   * assignment. Source objects are applied from left to right. Subsequent
   * sources overwrite property assignments of previous sources.
   *
   * **Note:** This method mutates `object`.
   *
   * @static
   * @memberOf _
   * @since 0.5.0
   * @category Object
   * @param {Object} object The destination object.
   * @param {...Object} [sources] The source objects.
   * @returns {Object} Returns `object`.
   * @example
   *
   * var object = {
   *   'a': [{ 'b': 2 }, { 'd': 4 }]
   * };
   *
   * var other = {
   *   'a': [{ 'c': 3 }, { 'e': 5 }]
   * };
   *
   * _.merge(object, other);
   * // => { 'a': [{ 'b': 2, 'c': 3 }, { 'd': 4, 'e': 5 }] }
   */
  var merge = _createAssigner(function(object, source, srcIndex) {
    _baseMerge(object, source, srcIndex);
  });

  var merge_1 = merge;

  function styleInject(css, ref) {
    if ( ref === void 0 ) ref = {};
    var insertAt = ref.insertAt;

    if (!css || typeof document === 'undefined') { return; }

    var head = document.head || document.getElementsByTagName('head')[0];
    var style = document.createElement('style');
    style.type = 'text/css';

    if (insertAt === 'top') {
      if (head.firstChild) {
        head.insertBefore(style, head.firstChild);
      } else {
        head.appendChild(style);
      }
    } else {
      head.appendChild(style);
    }

    if (style.styleSheet) {
      style.styleSheet.cssText = css;
    } else {
      style.appendChild(document.createTextNode(css));
    }
  }

  var css_248z = ".resize-observer[data-v-8859cc6c]{position:absolute;top:0;left:0;z-index:-1;width:100%;height:100%;border:none;background-color:transparent;pointer-events:none;display:block;overflow:hidden;opacity:0}.resize-observer[data-v-8859cc6c] object{display:block;position:absolute;top:0;left:0;height:100%;width:100%;overflow:hidden;pointer-events:none;z-index:-1}";
  styleInject(css_248z);

  function install(Vue) {
    var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
    if (install.installed) return;
    install.installed = true;
    var finalOptions = {};
    merge_1(finalOptions, defaultOptions, options);
    plugin.options = finalOptions;
    directive.options = finalOptions;
    Vue.directive('tooltip', directive);
    Vue.directive('close-popover', vclosepopover);
    Vue.component('VPopover', __vue_component__);
  }
  var VTooltip = directive;
  var VClosePopover = vclosepopover;
  var VPopover = __vue_component__;
  var plugin = {
    install: install,

    get enabled() {
      return state.enabled;
    },

    set enabled(value) {
      state.enabled = value;
    }

  }; // Auto-install

  var GlobalVue = null;

  if (typeof window !== 'undefined') {
    GlobalVue = window.Vue;
  } else if (typeof global !== 'undefined') {
    GlobalVue = global.Vue;
  }

  if (GlobalVue) {
    GlobalVue.use(plugin);
  }

  exports.VClosePopover = VClosePopover;
  exports.VPopover = VPopover;
  exports.VTooltip = VTooltip;
  exports.createTooltip = createTooltip;
  exports.default = plugin;
  exports.destroyTooltip = destroyTooltip;
  exports.install = install;

  Object.defineProperty(exports, '__esModule', { value: true });

})));