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/*!
 * Bootstrap v4.0.0 (https://getbootstrap.com)
 * Copyright 2011-2018 The Bootstrap Authors (https://github.com/twbs/bootstrap/graphs/contributors)
 * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
 */
(function(global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('jquery')) :
      typeof define === 'function' && define.amd ? define([
            'exports',
            'jquery'
          ], factory) :
          (factory((global.bootstrap = {}), global.jQuery));
}(this, (function(exports, $) {
  'use strict';

  $ = $ && $.hasOwnProperty('default') ? $['default'] : $;

  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;
  }

  function _extends() {
    _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;
    };

    return _extends.apply(this, arguments);
  }

  function _inheritsLoose(subClass, superClass) {
    subClass.prototype = Object.create(superClass.prototype);
    subClass.prototype.constructor = subClass;
    subClass.__proto__ = superClass;
  }

  /**
   * --------------------------------------------------------------------------
   * Bootstrap (v4.0.0): util.js
   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
   * --------------------------------------------------------------------------
   */

  var Util = function($$$1) {
    /**
     * ------------------------------------------------------------------------
     * Private TransitionEnd Helpers
     * ------------------------------------------------------------------------
     */
    var transition = false;
    var MAX_UID = 1000000; // Shoutout AngusCroll (https://goo.gl/pxwQGp)

    function toType(obj) {
      return {}.toString.call(obj).match(/\s([a-zA-Z]+)/)[1].toLowerCase();
    }

    function getSpecialTransitionEndEvent() {
      return {
        bindType    : transition.end,
        delegateType: transition.end,
        handle      : function handle(event) {
          if ($$$1(event.target).is(this)) {
            return event.handleObj.handler.apply(this, arguments); // eslint-disable-line prefer-rest-params
          }

          return undefined; // eslint-disable-line no-undefined
        }
      };
    }

    function transitionEndTest() {
      if (typeof window !== 'undefined' && window.QUnit) {
        return false;
      }

      return {
        end: 'transitionend'
      };
    }

    function transitionEndEmulator(duration) {
      var _this = this;

      var called = false;
      $$$1(this).one(Util.TRANSITION_END, function() {
        called = true;
      });
      setTimeout(function() {
        if (!called) {
          Util.triggerTransitionEnd(_this);
        }
      }, duration);
      return this;
    }

    function setTransitionEndSupport() {
      transition = transitionEndTest();
      $$$1.fn.emulateTransitionEnd = transitionEndEmulator;

      if (Util.supportsTransitionEnd()) {
        $$$1.event.special[Util.TRANSITION_END] = getSpecialTransitionEndEvent();
      }
    }

    function escapeId(selector) {
      // We escape IDs in case of special selectors (selector = '#myId:something')
      // $.escapeSelector does not exist in jQuery < 3
      selector = typeof $$$1.escapeSelector === 'function' ? $$$1.escapeSelector(selector).substr(1) : selector.replace(/(:|\.|\[|\]|,|=|@)/g, '\\$1');
      return selector;
    }

    /**
     * --------------------------------------------------------------------------
     * Public Util Api
     * --------------------------------------------------------------------------
     */


    var Util = {
      TRANSITION_END        : 'bsTransitionEnd',
      getUID                : function getUID(prefix) {
        do {
          // eslint-disable-next-line no-bitwise
          prefix += ~~(Math.random() * MAX_UID); // "~~" acts like a faster Math.floor() here
        } while (document.getElementById(prefix));

        return prefix;
      },
      getSelectorFromElement: function getSelectorFromElement(element) {
        var selector = element.getAttribute('data-target');

        if (!selector || selector === '#') {
          selector = element.getAttribute('href') || '';
        } // If it's an ID

        if (selector.charAt(0) === '#') {
          selector = escapeId(selector);
        }

        try {
          var $selector = $$$1(document).find(selector);
          return $selector.length > 0 ? selector : null;
        }
        catch (err) {
          return null;
        }
      },
      reflow                : function reflow(element) {
        return element.offsetHeight;
      },
      triggerTransitionEnd  : function triggerTransitionEnd(element) {
        $$$1(element).trigger(transition.end);
      },
      supportsTransitionEnd : function supportsTransitionEnd() {
        return Boolean(transition);
      },
      isElement             : function isElement(obj) {
        return (obj[0] || obj).nodeType;
      },
      typeCheckConfig       : function typeCheckConfig(componentName, config, configTypes) {
        for (var property in configTypes) {
          if (Object.prototype.hasOwnProperty.call(configTypes, property)) {
            var expectedTypes = configTypes[property];
            var value = config[property];
            var valueType = value && Util.isElement(value) ? 'element' : toType(value);

            if (!new RegExp(expectedTypes).test(valueType)) {
              throw new Error(componentName.toUpperCase() + ': ' + ('Option "' + property + '" provided type "' + valueType + '" ') + ('but expected type "' + expectedTypes + '".'));
            }
          }
        }
      }
    };
    setTransitionEndSupport();
    return Util;
  }($);

  /**!
   * @fileOverview Kickass library to create and place poppers near their reference elements.
   * @version 1.12.9
   * @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';
  var longerTimeoutBrowsers = [
    'Edge',
    'Trident',
    'Firefox'
  ];
  var timeoutDuration = 0;
  for (var i = 0; i < longerTimeoutBrowsers.length; i += 1) {
    if (isBrowser && navigator.userAgent.indexOf(longerTimeoutBrowsers[i]) >= 0) {
      timeoutDuration = 1;
      break;
    }
  }

  function microtaskDebounce(fn) {
    var 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(functionToCheck) {
    var getType = {};
    return functionToCheck && getType.toString.call(functionToCheck) === '[object Function]';
  }

  /**
   * Get CSS computed property of the given element
   * @method
   * @memberof Popper.Utils
   * @argument {Eement} element
   * @argument {String} property
   */
  function getStyleComputedProperty(element, property) {
    if (element.nodeType !== 1) {
      return [];
    }
    // NOTE: 1 DOM access here
    var css = 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)/.test(overflow + overflowY + overflowX)) {
      return element;
    }

    return getScrollParent(getParentNode(element));
  }

  /**
   * Returns the offset parent of the given element
   * @method
   * @memberof Popper.Utils
   * @argument {Element} element
   * @returns {Element} offset parent
   */
  function getOffsetParent(element) {
    // NOTE: 1 DOM access here
    var offsetParent = element && element.offsetParent;
    var nodeName = offsetParent && offsetParent.nodeName;

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

      return document.documentElement;
    }

    // .offsetParent will return the closest TD or TABLE in case
    // no offsetParent is present, I hate this job...
    if ([
      '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'], 10) + parseFloat(styles['border' + sideB + 'Width'], 10);
  }

  /**
   * Tells if you are running Internet Explorer 10
   * @method
   * @memberof Popper.Utils
   * @returns {Boolean} isIE10
   */
  var isIE10 = undefined;

  var isIE10$1 = function() {
    if (isIE10 === undefined) {
      isIE10 = navigator.appVersion.indexOf('MSIE 10') !== -1;
    }
    return isIE10;
  };

  function getSize(axis, body, html, computedStyle) {
    return Math.max(body['offset' + axis], body['scroll' + axis], html['client' + axis], html['offset' + axis], html['scroll' + axis], isIE10$1() ? html['offset' + axis] + computedStyle['margin' + (axis === 'Height' ? 'Top' : 'Left')] + computedStyle['margin' + (axis === 'Height' ? 'Bottom' : 'Right')] : 0);
  }

  function getWindowSizes() {
    var body = document.body;
    var html = document.documentElement;
    var computedStyle = isIE10$1() && getComputedStyle(html);

    return {
      height: getSize('Height', body, html, computedStyle),
      width : getSize('Width', body, html, computedStyle)
    };
  }

  var classCallCheck = function(instance, Constructor) {
    if (!(instance instanceof Constructor)) {
      throw new TypeError('Cannot call a class as a function');
    }
  };

  var createClass = function() {
    function defineProperties(target, props) {
      for (var i = 0; i < props.length; i++) {
        var descriptor = props[i];
        descriptor.enumerable = descriptor.enumerable || false;
        descriptor.configurable = true;
        if ('value' in descriptor) {
          descriptor.writable = true;
        }
        Object.defineProperty(target, descriptor.key, descriptor);
      }
    }

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

  var defineProperty = function(obj, key, value) {
    if (key in obj) {
      Object.defineProperty(obj, key, {
        value       : value,
        enumerable  : true,
        configurable: true,
        writable    : true
      });
    } else {
      obj[key] = value;
    }

    return obj;
  };

  var _extends$1 = 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$1({}, offsets, {
      right : offsets.left + offsets.width,
      bottom: offsets.top + offsets.height
    });
  }

  /**
   * Get bounding client rect of given element
   * @method
   * @memberof Popper.Utils
   * @param {HTMLElement} element
   * @return {Object} client rect
   */
  function getBoundingClientRect(element) {
    var rect = {};

    // IE10 10 FIX: Please, don't ask, the element isn't
    // considered in DOM in some circumstances...
    // This isn't reproducible in IE10 compatibility mode of IE11
    if (isIE10$1()) {
      try {
        rect = element.getBoundingClientRect();
        var scrollTop = getScroll(element, 'top');
        var scrollLeft = getScroll(element, 'left');
        rect.top += scrollTop;
        rect.left += scrollLeft;
        rect.bottom += scrollTop;
        rect.right += scrollLeft;
      }
      catch (err) {
      }
    } else {
      rect = element.getBoundingClientRect();
    }

    var result = {
      left  : rect.left,
      top   : rect.top,
      width : rect.right - rect.left,
      height: rect.bottom - rect.top
    };

    // subtract scrollbar size from sizes
    var sizes = element.nodeName === 'HTML' ? getWindowSizes() : {};
    var width = sizes.width || element.clientWidth || result.right - result.left;
    var height = sizes.height || element.clientHeight || result.bottom - result.top;

    var horizScrollbar = element.offsetWidth - width;
    var vertScrollbar = element.offsetHeight - height;

    // if an hypothetical scrollbar is detected, we must be sure it's not a `border`
    // we make this check conditional for performance reasons
    if (horizScrollbar || vertScrollbar) {
      var styles = getStyleComputedProperty(element);
      horizScrollbar -= getBordersSize(styles, 'x');
      vertScrollbar -= getBordersSize(styles, 'y');

      result.width -= horizScrollbar;
      result.height -= vertScrollbar;
    }

    return getClientRect(result);
  }

  function getOffsetRectRelativeToArbitraryNode(children, parent) {
    var isIE10 = isIE10$1();
    var isHTML = parent.nodeName === 'HTML';
    var childrenRect = getBoundingClientRect(children);
    var parentRect = getBoundingClientRect(parent);
    var scrollParent = getScrollParent(children);

    var styles = getStyleComputedProperty(parent);
    var borderTopWidth = parseFloat(styles.borderTopWidth, 10);
    var borderLeftWidth = parseFloat(styles.borderLeftWidth, 10);

    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, 10);
      var marginLeft = parseFloat(styles.marginLeft, 10);

      offsets.top -= borderTopWidth - marginTop;
      offsets.bottom -= borderTopWidth - marginTop;
      offsets.left -= borderLeftWidth - marginLeft;
      offsets.right -= borderLeftWidth - marginLeft;

      // Attach marginTop and marginLeft because in some circumstances we may need them
      offsets.marginTop = marginTop;
      offsets.marginLeft = marginLeft;
    }

    if (isIE10 ? parent.contains(scrollParent) : parent === scrollParent && scrollParent.nodeName !== 'BODY') {
      offsets = includeScroll(offsets, parent);
    }

    return offsets;
  }

  function getViewportOffsetRectRelativeToArtbitraryNode(element) {
    var html = 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 = getScroll(html);
    var scrollLeft = getScroll(html, 'left');

    var offset = {
      top   : scrollTop - relativeOffset.top + relativeOffset.marginTop,
      left  : scrollLeft - relativeOffset.left + relativeOffset.marginLeft,
      width : width,
      height: height
    };

    return getClientRect(offset);
  }

  /**
   * Check if the given element is fixed or is inside a fixed parent
   * @method
   * @memberof Popper.Utils
   * @argument {Element} element
   * @argument {Element} customContainer
   * @returns {Boolean} answer to "isFixed?"
   */
  function isFixed(element) {
    var nodeName = element.nodeName;
    if (nodeName === 'BODY' || nodeName === 'HTML') {
      return false;
    }
    if (getStyleComputedProperty(element, 'position') === 'fixed') {
      return true;
    }
    return isFixed(getParentNode(element));
  }

  /**
   * Computed the boundaries limits and return them
   * @method
   * @memberof Popper.Utils
   * @param {HTMLElement} popper
   * @param {HTMLElement} reference
   * @param {number} padding
   * @param {HTMLElement} boundariesElement - Element used to define the boundaries
   * @returns {Object} Coordinates of the boundaries
   */
  function getBoundaries(popper, reference, padding, boundariesElement) {
    // NOTE: 1 DOM access here
    var boundaries = {
      top : 0,
      left: 0
    };
    var offsetParent = findCommonOffsetParent(popper, reference);

    // Handle viewport case
    if (boundariesElement === 'viewport') {
      boundaries = getViewportOffsetRectRelativeToArtbitraryNode(offsetParent);
    } else {
      // Handle other cases based on DOM element used as boundaries
      var boundariesNode = void 0;
      if (boundariesElement === 'scrollParent') {
        boundariesNode = getScrollParent(getParentNode(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);

      // In case of HTML, we need a different computation
      if (boundariesNode.nodeName === 'HTML' && !isFixed(offsetParent)) {
        var _getWindowSizes = getWindowSizes(),
            height          = _getWindowSizes.height,
            width           = _getWindowSizes.width;

        boundaries.top += offsets.top - offsets.marginTop;
        boundaries.bottom = height + offsets.top;
        boundaries.left += offsets.left - offsets.marginLeft;
        boundaries.right = width + offsets.left;
      } else {
        // for all the other DOM elements, this one is good
        boundaries = offsets;
      }
    }

    // Add paddings
    boundaries.left += padding;
    boundaries.top += padding;
    boundaries.right -= padding;
    boundaries.bottom -= padding;

    return boundaries;
  }

  function getArea(_ref) {
    var width  = _ref.width,
        height = _ref.height;

    return width * height;
  }

  /**
   * Utility used to transform the `auto` placement to the placement with more
   * available space.
   * @method
   * @memberof Popper.Utils
   * @argument {Object} data - The data object generated by update method
   * @argument {Object} options - Modifiers configuration and options
   * @returns {Object} The data object, properly modified
   */
  function computeAutoPlacement(placement, refRect, popper, reference, boundariesElement) {
    var padding = arguments.length > 5 && arguments[5] !== undefined ? arguments[5] : 0;

    if (placement.indexOf('auto') === -1) {
      return placement;
    }

    var boundaries = getBoundaries(popper, reference, padding, boundariesElement);

    var rects = {
      top   : {
        width : boundaries.width,
        height: refRect.top - boundaries.top
      },
      right : {
        width : boundaries.right - refRect.right,
        height: boundaries.height
      },
      bottom: {
        width : boundaries.width,
        height: boundaries.bottom - refRect.bottom
      },
      left  : {
        width : refRect.left - boundaries.left,
        height: boundaries.height
      }
    };

    var sortedAreas = Object.keys(rects).map(function(key) {
      return _extends$1({
        key: key
      }, rects[key], {
        area: getArea(rects[key])
      });
    }).sort(function(a, b) {
      return b.area - a.area;
    });

    var filteredAreas = sortedAreas.filter(function(_ref2) {
      var width  = _ref2.width,
          height = _ref2.height;
      return width >= popper.clientWidth && height >= popper.clientHeight;
    });

    var computedPlacement = filteredAreas.length > 0 ? filteredAreas[0].key : sortedAreas[0].key;

    var variation = placement.split('-')[1];

    return computedPlacement + (variation ? '-' + variation : '');
  }

  /**
   * Get offsets to the reference element
   * @method
   * @memberof Popper.Utils
   * @param {Object} state
   * @param {Element} popper - the popper element
   * @param {Element} reference - the reference element (the popper will be relative to this)
   * @returns {Object} An object containing the offsets which will be applied to the popper
   */
  function getReferenceOffsets(state, popper, reference) {
    var commonOffsetParent = findCommonOffsetParent(popper, reference);
    return getOffsetRectRelativeToArbitraryNode(reference, commonOffsetParent);
  }

  /**
   * Get the outer sizes of the given element (offset size + margins)
   * @method
   * @memberof Popper.Utils
   * @argument {Element} element
   * @returns {Object} object containing width and height properties
   */
  function getOuterSizes(element) {
    var styles = getComputedStyle(element);
    var x = parseFloat(styles.marginTop) + parseFloat(styles.marginBottom);
    var y = parseFloat(styles.marginLeft) + parseFloat(styles.marginRight);
    var result = {
      width : element.offsetWidth + y,
      height: element.offsetHeight + x
    };
    return result;
  }

  /**
   * Get the opposite placement of the given one
   * @method
   * @memberof Popper.Utils
   * @argument {String} placement
   * @returns {String} flipped placement
   */
  function getOppositePlacement(placement) {
    var hash = {
      left  : 'right',
      right : 'left',
      bottom: 'top',
      top   : 'bottom'
    };
    return placement.replace(/left|right|bottom|top/g, function(matched) {
      return hash[matched];
    });
  }

  /**
   * Get offsets to the popper
   * @method
   * @memberof Popper.Utils
   * @param {Object} position - CSS position the Popper will get applied
   * @param {HTMLElement} popper - the popper element
   * @param {Object} referenceOffsets - the reference offsets (the popper will be relative to this)
   * @param {String} placement - one of the valid placement options
   * @returns {Object} popperOffsets - An object containing the offsets which will be applied to the popper
   */
  function getPopperOffsets(popper, referenceOffsets, placement) {
    placement = placement.split('-')[0];

    // Get popper node sizes
    var popperRect = getOuterSizes(popper);

    // Add position, width and height to our offsets object
    var popperOffsets = {
      width : popperRect.width,
      height: popperRect.height
    };

    // depending by the popper placement we have to compute its offsets slightly differently
    var isHoriz = [
      'right',
      'left'
    ].indexOf(placement) !== -1;
    var mainSide = isHoriz ? 'top' : 'left';
    var secondarySide = isHoriz ? 'left' : 'top';
    var measurement = isHoriz ? 'height' : 'width';
    var secondaryMeasurement = !isHoriz ? 'height' : 'width';

    popperOffsets[mainSide] = referenceOffsets[mainSide] + referenceOffsets[measurement] / 2 - popperRect[measurement] / 2;
    if (placement === secondarySide) {
      popperOffsets[secondarySide] = referenceOffsets[secondarySide] - popperRect[secondaryMeasurement];
    } else {
      popperOffsets[secondarySide] = referenceOffsets[getOppositePlacement(secondarySide)];
    }

    return popperOffsets;
  }

  /**
   * Mimics the `find` method of Array
   * @method
   * @memberof Popper.Utils
   * @argument {Array} arr
   * @argument prop
   * @argument value
   * @returns index or -1
   */
  function find(arr, check) {
    // use native find if supported
    if (Array.prototype.find) {
      return arr.find(check);
    }

    // use `filter` to obtain the same behavior of `find`
    return arr.filter(check)[0];
  }

  /**
   * Return the index of the matching object
   * @method
   * @memberof Popper.Utils
   * @argument {Array} arr
   * @argument prop
   * @argument value
   * @returns index or -1
   */
  function findIndex(arr, prop, value) {
    // use native findIndex if supported
    if (Array.prototype.findIndex) {
      return arr.findIndex(function(cur) {
        return cur[prop] === value;
      });
    }

    // use `find` + `indexOf` if `findIndex` isn't supported
    var match = find(arr, function(obj) {
      return obj[prop] === value;
    });
    return arr.indexOf(match);
  }

  /**
   * Loop trough the list of modifiers and run them in order,
   * each of them will then edit the data object.
   * @method
   * @memberof Popper.Utils
   * @param {dataObject} data
   * @param {Array} modifiers
   * @param {String} ends - Optional modifier name used as stopper
   * @returns {dataObject}
   */
  function runModifiers(modifiers, data, ends) {
    var modifiersToRun = ends === undefined ? modifiers : modifiers.slice(0, findIndex(modifiers, 'name', ends));

    modifiersToRun.forEach(function(modifier) {
      if (modifier['function']) {
        // 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(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);

    // compute auto placement, store placement inside the data object,
    // modifiers will be able to edit `placement` if needed
    // and refer to originalPlacement to know the original value
    data.placement = computeAutoPlacement(this.options.placement, data.offsets.reference, this.popper, this.reference, this.options.modifiers.flip.boundariesElement, this.options.modifiers.flip.padding);

    // store the computed placement inside `originalPlacement`
    data.originalPlacement = data.placement;

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

    // run the modifiers
    data = runModifiers(this.modifiers, data);

    // the first `update` will call `onCreate` callback
    // the other ones will call `onUpdate` callback
    if (!this.state.isCreated) {
      this.state.isCreated = true;
      this.options.onCreate(data);
    } else {
      this.options.onUpdate(data);
    }
  }

  /**
   * Helper used to know if the given modifier is enabled.
   * @method
   * @memberof Popper.Utils
   * @returns {Boolean}
   */
  function isModifierEnabled(modifiers, modifierName) {
    return modifiers.some(function(_ref) {
      var name    = _ref.name,
          enabled = _ref.enabled;
      return enabled && name === modifierName;
    });
  }

  /**
   * Get the prefixed supported property name
   * @method
   * @memberof Popper.Utils
   * @argument {String} property (camelCase)
   * @returns {String} prefixed property (camelCase 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 - 1; i++) {
      var prefix = prefixes[i];
      var toCheck = prefix ? '' + prefix + upperProp : property;
      if (typeof document.body.style[toCheck] !== 'undefined') {
        return toCheck;
      }
    }
    return null;
  }

  /**
   * Destroy the popper
   * @method
   * @memberof Popper
   */
  function destroy() {
    this.state.isDestroyed = true;

    // touch DOM only if `applyStyle` modifier is enabled
    if (isModifierEnabled(this.modifiers, 'applyStyle')) {
      this.popper.removeAttribute('x-placement');
      this.popper.style.left = '';
      this.popper.style.position = '';
      this.popper.style.top = '';
      this.popper.style[getSupportedPropertyName('transform')] = '';
    }

    this.disableEventListeners();

    // remove the popper if user explicity asked for the deletion on destroy
    // do not use `remove` because IE11 doesn't support it
    if (this.options.removeOnDestroy) {
      this.popper.parentNode.removeChild(this.popper);
    }
    return this;
  }

  /**
   * 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);

    // 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: 'absolute'});

    return options;
  }

  /**
   * @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
    };

    // floor sides to avoid blurry text
    var offsets = {
      left  : Math.floor(popper.left),
      top   : Math.floor(popper.top),
      bottom: Math.floor(popper.bottom),
      right : Math.floor(popper.right)
    };

    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') {
      top = -offsetParentRect.height + offsets.bottom;
    } else {
      top = offsets.top;
    }
    if (sideB === 'right') {
      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$1({}, attributes, data.attributes);
    data.styles = _extends$1({}, styles, data.styles);
    data.arrowStyles = _extends$1({}, 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 conjuction
    //

    // top/left side
    if (reference[opSide] - arrowElementSize < popper[side]) {
      data.offsets.popper[side] -= popper[side] - (reference[opSide] - arrowElementSize);
    }
    // bottom/right side
    if (reference[side] + arrowElementSize > popper[opSide]) {
      data.offsets.popper[side] += reference[side] + arrowElementSize - popper[opSide];
    }
    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], 10);
    var popperBorderSide = parseFloat(css['border' + sideCapitalized + 'Width'], 10);
    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(_data$offsets$arrow, side, Math.round(sideValue)), defineProperty(_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-right` (on the side with more space available, alignment depends by placement)
   *
   * @static
   * @type {Array}
   * @enum {String}
   * @readonly
   * @method placements
   * @memberof Popper
   */
  var placements = [
    'auto-start',
    'auto',
    'auto-end',
    'top-start',
    'top',
    'top-end',
    'right-start',
    'right',
    'right-end',
    'bottom-end',
    'bottom',
    'bottom-start',
    'left-end',
    'left',
    'left-start'
  ];

  // Get rid of `auto` `auto-start` and `auto-end`
  var validPlacements = placements.slice(3);

  /**
   * Given an initial placement, returns all the subsequent placements
   * clockwise (or counter-clockwise).
   *
   * @method
   * @memberof Popper.Utils
   * @argument {String} placement - A valid placement (it accepts variations)
   * @argument {Boolean} counter - Set to true to walk the placements counterclockwise
   * @returns {Array} placements including their variations
   */
  function clockwise(placement) {
    var counter = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;

    var index = validPlacements.indexOf(placement);
    var arr = validPlacements.slice(index + 1).concat(validPlacements.slice(0, index));
    return counter ? arr.reverse() : arr;
  }

  var BEHAVIORS = {
    FLIP            : 'flip',
    CLOCKWISE       : 'clockwise',
    COUNTERCLOCKWISE: 'counterclockwise'
  };

  /**
   * @function
   * @memberof Modifiers
   * @argument {Object} data - The data object generated by update method
   * @argument {Object} options - Modifiers configuration and options
   * @returns {Object} The data object, properly modified
   */
  function flip(data, options) {
    // if `inner` modifier is enabled, we can't use the `flip` modifier
    if (isModifierEnabled(data.instance.modifiers, 'inner')) {
      return data;
    }

    if (data.flipped && data.placement === data.originalPlacement) {
      // seems like flip is trying to loop, probably there's not enough space on any of the flippable sides
      return data;
    }

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

    var placement = data.placement.split('-')[0];
    var placementOpposite = getOppositePlacement(placement);
    var variation = data.placement.split('-')[1] || '';

    var flipOrder = [];

    switch (options.behavior) {
      case BEHAVIORS.FLIP:
        flipOrder = [
          placement,
          placementOpposite
        ];
        break;
      case BEHAVIORS.CLOCKWISE:
        flipOrder = clockwise(placement);
        break;
      case BEHAVIORS.COUNTERCLOCKWISE:
        flipOrder = clockwise(placement, true);
        break;
      default:
        flipOrder = options.behavior;
    }

    flipOrder.forEach(function(step, index) {
      if (placement !== step || flipOrder.length === index + 1) {
        return data;
      }

      placement = data.placement.split('-')[0];
      placementOpposite = getOppositePlacement(placement);

      var popperOffsets = data.offsets.popper;
      var refOffsets = data.offsets.reference;

      // using floor because the reference offsets may contain decimals we are not going to consider here
      var floor = Math.floor;
      var overlapsRef = placement === 'left' && floor(popperOffsets.right) > floor(refOffsets.left) || placement === 'right' && floor(popperOffsets.left) < floor(refOffsets.right) || placement === 'top' && floor(popperOffsets.bottom) > floor(refOffsets.top) || placement === 'bottom' && floor(popperOffsets.top) < floor(refOffsets.bottom);

      var overflowsLeft = floor(popperOffsets.left) < floor(boundaries.left);
      var overflowsRight = floor(popperOffsets.right) > floor(boundaries.right);
      var overflowsTop = floor(popperOffsets.top) < floor(boundaries.top);
      var overflowsBottom = floor(popperOffsets.bottom) > floor(boundaries.bottom);

      var overflowsBoundaries = placement === 'left' && overflowsLeft || placement === 'right' && overflowsRight || placement === 'top' && overflowsTop || placement === 'bottom' && overflowsBottom;

      // flip the variation if required
      var isVertical = [
        'top',
        'bottom'
      ].indexOf(placement) !== -1;
      var flippedVariation = !!options.flipVariations && (isVertical && variation === 'start' && overflowsLeft || isVertical && variation === 'end' && overflowsRight || !isVertical && variation === 'start' && overflowsTop || !isVertical && variation === 'end' && overflowsBottom);

      if (overlapsRef || overflowsBoundaries || flippedVariation) {
        // this boolean to detect any flip loop
        data.flipped = true;

        if (overlapsRef || overflowsBoundaries) {
          placement = flipOrder[index + 1];
        }

        if (flippedVariation) {
          variation = getOppositeVariation(variation);
        }

        data.placement = placement + (variation ? '-' + variation : '');

        // this object contains `position`, we want to preserve it along with
        // any additional property we may add in the future
        data.offsets.popper = _extends$1({}, 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);
    }

    var boundaries = getBoundaries(data.instance.popper, data.instance.reference, options.padding, boundariesElement);
    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({}, placement, value);
      },
      secondary: function secondary(placement) {
        var mainSide = placement === 'right' ? 'left' : 'top';
        var value = popper[mainSide];
        if (popper[placement] > boundaries[placement] && !options.escapeWithReference) {
          value = Math.min(popper[mainSide], boundaries[placement] - (placement === 'right' ? popper.width : popper.height));
        }
        return defineProperty({}, mainSide, value);
      }
    };

    order.forEach(function(placement) {
      var side = [
        'left',
        'top'
      ].indexOf(placement) !== -1 ? 'primary' : 'secondary';
      popper = _extends$1({}, 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({}, side, reference[side]),
        end  : defineProperty({}, side, reference[side] + reference[measurement] - popper[measurement])
      };

      data.offsets.popper = _extends$1({}, 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 unitless, interpreted as pixels
     * - `%` or `%r`, percentage relative to the length of the reference element
     * - `%p`, percentage relative to the length of the popper element
     * - `vw`, CSS viewport width unit
     * - `vh`, CSS viewport height unit
     *
     * For length is intended the main axis relative to the placement of the popper.<br />
     * This means that if the placement is `top` or `bottom`, the length will be the
     * `width`. In case of `left` or `right`, it will be the height.
     *
     * You can provide a single value (as `Number` or `String`), or a pair of values
     * as `String` divided by a comma or one (or more) white spaces.<br />
     * The latter is a deprecated method because it leads to confusion and will be
     * removed in v2.<br />
     * Additionally, it accepts additions and subtractions between different units.
     * Note that multiplications and divisions aren't supported.
     *
     * Valid examples are:
     * ```
     * 10
     * '10%'
     * '10, 10'
     * '10%, 10'
     * '10 + 10%'
     * '10 - 5vh + 3%'
     * '-10px + 5vh, 5px - 6%'
     * ```
     * > **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.
     * > More on this [reading 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.
     *
     * An scenario exists where the reference itself is not within the boundaries.<br />
     * We can say it has "escaped the boundaries" — or just "escaped".<br />
     * In this case we need to decide whether the popper should either:
     *
     * - detach from the reference and remain "trapped" in the boundaries, or
     * - if it should ignore the boundary and "escape with its reference"
     *
     * When `escapeWithReference` is set to`true` and reference is completely
     * outside its boundaries, the popper will overflow (or completely leave)
     * the boundaries in order to remain attached to the edge of the reference.
     *
     * @memberof modifiers
     * @inner
     */
    preventOverflow: {
      /** @prop {number} order=300 - Index used to define the order of execution */
      order            : 300,
      /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
      enabled          : true,
      /** @prop {ModifierFn} */
      fn               : preventOverflow,
      /**
       * @prop {Array} [priority=['left','right','top','bottom']]
       * Popper will try to prevent overflow following these priorities by default,
       * then, it could overflow on the left and on top of the `boundariesElement`
       */
      priority         : [
        'left',
        'right',
        'top',
        'bottom'
      ],
      /**
       * @prop {number} padding=5
       * Amount of pixel used to define a minimum distance between the boundaries
       * and the popper this makes sure the popper has always a little padding
       * between the edges of its container
       */
      padding          : 5,
      /**
       * @prop {String|HTMLElement} boundariesElement='scrollParent'
       * Boundaries used by the modifier, can be `scrollParent`, `window`,
       * `viewport` or any DOM element.
       */
      boundariesElement: 'scrollParent'
    },

    /**
     * Modifier used to make sure the reference and its popper stay near eachothers
     * without leaving any gap between the two. Expecially useful when the arrow is
     * enabled and you want to assure it to point to its reference element.
     * It cares only about the first axis, you can still have poppers with margin
     * between the popper and its reference element.
     * @memberof modifiers
     * @inner
     */
    keepTogether: {
      /** @prop {number} order=400 - Index used to define the order of execution */
      order  : 400,
      /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
      enabled: true,
      /** @prop {ModifierFn} */
      fn     : keepTogether
    },

    /**
     * This modifier is used to move the `arrowElement` of the popper to make
     * sure it is positioned between the reference element and its popper element.
     * It will read the outer size of the `arrowElement` node to detect how many
     * pixels of conjuction are needed.
     *
     * It has no effect if no `arrowElement` is provided.
     * @memberof modifiers
     * @inner
     */
    arrow: {
      /** @prop {number} order=500 - Index used to define the order of execution */
      order  : 500,
      /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
      enabled: true,
      /** @prop {ModifierFn} */
      fn     : arrow,
      /** @prop {String|HTMLElement} element='[x-arrow]' - Selector or node used as arrow */
      element: '[x-arrow]'
    },

    /**
     * Modifier used to flip the popper's placement when it starts to overlap its
     * reference element.
     *
     * Requires the `preventOverflow` modifier before it in order to work.
     *
     * **NOTE:** this modifier will interrupt the current update cycle and will
     * restart it if it detects the need to flip the placement.
     * @memberof modifiers
     * @inner
     */
    flip: {
      /** @prop {number} order=600 - Index used to define the order of execution */
      order            : 600,
      /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
      enabled          : true,
      /** @prop {ModifierFn} */
      fn               : flip,
      /**
       * @prop {String|Array} behavior='flip'
       * The behavior used to change the popper's placement. It can be one of
       * `flip`, `clockwise`, `counterclockwise` or an array with a list of valid
       * placements (with optional variations).
       */
      behavior         : 'flip',
      /**
       * @prop {number} padding=5
       * The popper will flip if it hits the edges of the `boundariesElement`
       */
      padding          : 5,
      /**
       * @prop {String|HTMLElement} boundariesElement='viewport'
       * The element which will define the boundaries of the popper position,
       * the popper will never be placed outside of the defined boundaries
       * (except if keepTogether is enabled)
       */
      boundariesElement: 'viewport'
    },

    /**
     * Modifier used to make the popper flow toward the inner of the reference element.
     * By default, when this modifier is disabled, the popper will be placed outside
     * the reference element.
     * @memberof modifiers
     * @inner
     */
    inner: {
      /** @prop {number} order=700 - Index used to define the order of execution */
      order  : 700,
      /** @prop {Boolean} enabled=false - Whether the modifier is enabled or not */
      enabled: false,
      /** @prop {ModifierFn} */
      fn     : inner
    },

    /**
     * Modifier used to hide the popper when its reference element is outside of the
     * popper boundaries. It will set a `x-out-of-boundaries` attribute which can
     * be used to hide with a CSS selector the popper when its reference is
     * out of boundaries.
     *
     * Requires the `preventOverflow` modifier before it in order to work.
     * @memberof modifiers
     * @inner
     */
    hide: {
      /** @prop {number} order=800 - Index used to define the order of execution */
      order  : 800,
      /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
      enabled: true,
      /** @prop {ModifierFn} */
      fn     : hide
    },

    /**
     * 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 you own to achieve the desired effect.
     *
     * @memberof modifiers
     * @inner
     */
    applyStyle: {
      /** @prop {number} order=900 - Index used to define the order of execution */
      order          : 900,
      /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
      enabled        : true,
      /** @prop {ModifierFn} */
      fn             : applyStyle,
      /** @prop {Function} */
      onLoad         : applyStyleOnLoad,
      /**
       * @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 informations used by Popper.js
   * this object get passed to modifiers and to the `onCreate` and `onUpdate` callbacks.
   * @name dataObject
   * @property {Object} data.instance The Popper.js instance
   * @property {String} data.placement Placement applied to popper
   * @property {String} data.originalPlacement Placement originally defined on init
   * @property {Boolean} data.flipped True if popper has been flipped by flip modifier
   * @property {Boolean} data.hide True if the reference element is out of boundaries, useful to know when to hide the popper.
   * @property {HTMLElement} data.arrowElement Node used as arrow by arrow modifier
   * @property {Object} data.styles Any CSS property defined here will be applied to the popper, it expects the JavaScript nomenclature (eg. `marginBottom`)
   * @property {Object} data.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 overriden using the `options` argument of Popper.js.<br />
   * To override an option, simply pass as 3rd argument an object with the same
   * structure of this object, example:
   * ```
   * new Popper(ref, pop, {
   *   modifiers: {
   *     preventOverflow: { enabled: false }
   *   }
   * })
   * ```
   * @type {Object}
   * @static
   * @memberof Popper
   */
  var Defaults = {
    /**
     * Popper's placement
     * @prop {Popper.placements} placement='bottom'
     */
    placement: 'bottom',

    /**
     * Whether events (resize, scroll) are initially enabled
     * @prop {Boolean} eventsEnabled=true
     */
    eventsEnabled: true,

    /**
     * Set to true if you want to automatically remove the popper when
     * you call the `destroy` method.
     * @prop {Boolean} removeOnDestroy=false
     */
    removeOnDestroy: false,

    /**
     * Callback called when the popper is created.<br />
     * By default, is set to no-op.<br />
     * Access Popper.js instance with `data.instance`.
     * @prop {onCreate}
     */
    onCreate: function onCreate() {},

    /**
     * Callback called when the popper is updated, this callback is not called
     * on the initialization/creation of the popper, but only on subsequent
     * updates.<br />
     * By default, is set to no-op.<br />
     * Access Popper.js instance with `data.instance`.
     * @prop {onUpdate}
     */
    onUpdate: function onUpdate() {},

    /**
     * List of modifiers used to modify the offsets before they are applied to the popper.
     * They provide most of the functionalities of Popper.js
     * @prop {modifiers}
     */
    modifiers: modifiers
  };

  /**
   * @callback onCreate
   * @param {dataObject} data
   */

  /**
   * @callback onUpdate
   * @param {dataObject} data
   */

      // Utils
      // Methods
  var Popper = function() {
        /**
         * Create a new Popper.js instance
         * @class Popper
         * @param {HTMLElement|referenceObject} reference - The reference element used to position the popper
         * @param {HTMLElement} popper - The HTML element used as popper.
         * @param {Object} options - Your custom options to override the ones defined in [Defaults](#defaults)
         * @return {Object} instance - The generated Popper.js instance
         */
        function Popper(reference, popper) {
          var _this = this;

          var options = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};
          classCallCheck(this, Popper);

          this.scheduleUpdate = function() {
            return requestAnimationFrame(_this.update);
          };

          // make update() debounced, so that it only runs at most once-per-tick
          this.update = debounce(this.update.bind(this));

          // with {} we create a new object with the options inside it
          this.options = _extends$1({}, 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$1({}, Popper.Defaults.modifiers, options.modifiers)).forEach(function(name) {
            _this.options.modifiers[name] = _extends$1({}, 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$1({
                  name: name
                }, _this.options.modifiers[name]);
              })
              // sort the modifiers by order
              .sort(function(a, b) {
                return a.order - b.order;
              });

          // modifiers have the ability to execute arbitrary code when Popper.js get inited
          // such code is executed in the same order of its modifier
          // they could add new properties to their options configuration
          // BE AWARE: don't add options to `options.modifiers.name` but to `modifierOptions`!
          this.modifiers.forEach(function(modifierOptions) {
            if (modifierOptions.enabled && isFunction(modifierOptions.onLoad)) {
              modifierOptions.onLoad(_this.reference, _this.popper, _this.options, modifierOptions, _this.state);
            }
          });

          // fire the first update to position the popper in the right place
          this.update();

          var eventsEnabled = this.options.eventsEnabled;
          if (eventsEnabled) {
            // setup event listeners, they will take care of update the position in specific situations
            this.enableEventListeners();
          }

          this.state.eventsEnabled = eventsEnabled;
        }

        // We can't use class properties because they don't get listed in the
        // class prototype and break stuff like Sinon stubs

        createClass(Popper, [
          {
            key  : 'update',
            value: function update$$1() {
              return update.call(this);
            }
          },
          {
            key  : 'destroy',
            value: function destroy$$1() {
              return destroy.call(this);
            }
          },
          {
            key  : 'enableEventListeners',
            value: function enableEventListeners$$1() {
              return enableEventListeners.call(this);
            }
          },
          {
            key  : 'disableEventListeners',
            value: function disableEventListeners$$1() {
              return disableEventListeners.call(this);
            }

            /**
             * Schedule an update, it will run on the next UI update available
             * @method scheduleUpdate
             * @memberof Popper
             */


            /**
             * Collection of utilities useful when writing custom modifiers.
             * Starting from version 1.7, this method is available only if you
             * include `popper-utils.js` before `popper.js`.
             *
             * **DEPRECATION**: This way to access PopperUtils is deprecated
             * and will be removed in v2! Use the PopperUtils module directly instead.
             * 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;

  /**
   * --------------------------------------------------------------------------
   * Bootstrap (v4.0.0): tooltip.js
   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
   * --------------------------------------------------------------------------
   */

  var Tooltip = function($$$1) {
    /**
     * ------------------------------------------------------------------------
     * Constants
     * ------------------------------------------------------------------------
     */
    var NAME = 'tooltip';
    var VERSION = '4.0.0';
    var DATA_KEY = 'bs.tooltip';
    var EVENT_KEY = '.' + DATA_KEY;
    var JQUERY_NO_CONFLICT = $$$1.fn[NAME];
    var TRANSITION_DURATION = 150;
    var CLASS_PREFIX = 'bs-tooltip';
    var BSCLS_PREFIX_REGEX = new RegExp('(^|\\s)' + CLASS_PREFIX + '\\S+', 'g');
    var DefaultType = {
      animation        : 'boolean',
      template         : 'string',
      title            : '(string|element|function)',
      trigger          : 'string',
      delay            : '(number|object)',
      html             : 'boolean',
      selector         : '(string|boolean)',
      placement        : '(string|function)',
      offset           : '(number|string)',
      container        : '(string|element|boolean)',
      fallbackPlacement: '(string|array)',
      boundary         : '(string|element)'
    };
    var AttachmentMap = {
      AUTO  : 'auto',
      TOP   : 'top',
      RIGHT : 'right',
      BOTTOM: 'bottom',
      LEFT  : 'left'
    };
    var Default = {
      animation        : true,
      template         : '<div class="tooltip" role="tooltip">' + '<div class="arrow"></div>' + '<div class="tooltip-inner"></div></div>',
      trigger          : 'hover focus',
      title            : '',
      delay            : 0,
      html             : false,
      selector         : false,
      placement        : 'top',
      offset           : 0,
      container        : false,
      fallbackPlacement: 'flip',
      boundary         : 'scrollParent'
    };
    var HoverState = {
      SHOW: 'show',
      OUT : 'out'
    };
    var Event = {
      HIDE      : 'hide' + EVENT_KEY,
      HIDDEN    : 'hidden' + EVENT_KEY,
      SHOW      : 'show' + EVENT_KEY,
      SHOWN     : 'shown' + EVENT_KEY,
      INSERTED  : 'inserted' + EVENT_KEY,
      CLICK     : 'click' + EVENT_KEY,
      FOCUSIN   : 'focusin' + EVENT_KEY,
      FOCUSOUT  : 'focusout' + EVENT_KEY,
      MOUSEENTER: 'mouseenter' + EVENT_KEY,
      MOUSELEAVE: 'mouseleave' + EVENT_KEY
    };
    var ClassName = {
      FADE: 'fade',
      SHOW: 'show'
    };
    var Selector = {
      TOOLTIP      : '.tooltip',
      TOOLTIP_INNER: '.tooltip-inner',
      ARROW        : '.arrow'
    };
    var Trigger = {
      HOVER : 'hover',
      FOCUS : 'focus',
      CLICK : 'click',
      MANUAL: 'manual'
      /**
       * ------------------------------------------------------------------------
       * Class Definition
       * ------------------------------------------------------------------------
       */

    };

    var Tooltip =
            /*#__PURE__*/
            function() {
              function Tooltip(element, config) {
                /**
                 * Check for Popper dependency
                 * Popper - https://popper.js.org
                 */
                if (typeof Popper === 'undefined') {
                  throw new TypeError('Bootstrap tooltips require Popper.js (https://popper.js.org)');
                } // private

                this._isEnabled = true;
                this._timeout = 0;
                this._hoverState = '';
                this._activeTrigger = {};
                this._popper = null; // Protected

                this.element = element;
                this.config = this._getConfig(config);
                this.tip = null;

                this._setListeners();
              } // Getters

              var _proto = Tooltip.prototype;

              // Public
              _proto.enable = function enable() {
                this._isEnabled = true;
              };

              _proto.disable = function disable() {
                this._isEnabled = false;
              };

              _proto.toggleEnabled = function toggleEnabled() {
                this._isEnabled = !this._isEnabled;
              };

              _proto.toggle = function toggle(event) {
                if (!this._isEnabled) {
                  return;
                }

                if (event) {
                  var dataKey = this.constructor.DATA_KEY;
                  var context = $$$1(event.currentTarget).data(dataKey);

                  if (!context) {
                    context = new this.constructor(event.currentTarget, this._getDelegateConfig());
                    $$$1(event.currentTarget).data(dataKey, context);
                  }

                  context._activeTrigger.click = !context._activeTrigger.click;

                  if (context._isWithActiveTrigger()) {
                    context._enter(null, context);
                  } else {
                    context._leave(null, context);
                  }
                } else {
                  if ($$$1(this.getTipElement()).hasClass(ClassName.SHOW)) {
                    this._leave(null, this);

                    return;
                  }

                  this._enter(null, this);
                }
              };

              _proto.dispose = function dispose() {
                clearTimeout(this._timeout);
                $$$1.removeData(this.element, this.constructor.DATA_KEY);
                $$$1(this.element).off(this.constructor.EVENT_KEY);
                $$$1(this.element).closest('.modal').off('hide.bs.modal');

                if (this.tip) {
                  $$$1(this.tip).remove();
                }

                this._isEnabled = null;
                this._timeout = null;
                this._hoverState = null;
                this._activeTrigger = null;

                if (this._popper !== null) {
                  this._popper.destroy();
                }

                this._popper = null;
                this.element = null;
                this.config = null;
                this.tip = null;
              };

              _proto.show = function show() {
                var _this = this;

                if ($$$1(this.element).css('display') === 'none') {
                  throw new Error('Please use show on visible elements');
                }

                var showEvent = $$$1.Event(this.constructor.Event.SHOW);

                if (this.isWithContent() && this._isEnabled) {
                  $$$1(this.element).trigger(showEvent);
                  var isInTheDom = $$$1.contains(this.element.ownerDocument.documentElement, this.element);

                  if (showEvent.isDefaultPrevented() || !isInTheDom) {
                    return;
                  }

                  var tip = this.getTipElement();
                  var tipId = Util.getUID(this.constructor.NAME);
                  tip.setAttribute('id', tipId);
                  this.element.setAttribute('aria-describedby', tipId);
                  this.setContent();

                  if (this.config.animation) {
                    $$$1(tip).addClass(ClassName.FADE);
                  }

                  var placement = typeof this.config.placement === 'function' ? this.config.placement.call(this, tip, this.element) : this.config.placement;

                  var attachment = this._getAttachment(placement);

                  this.addAttachmentClass(attachment);
                  var container = this.config.container === false ? document.body : $$$1(this.config.container);
                  $$$1(tip).data(this.constructor.DATA_KEY, this);

                  if (!$$$1.contains(this.element.ownerDocument.documentElement, this.tip)) {
                    $$$1(tip).appendTo(container);
                  }

                  $$$1(this.element).trigger(this.constructor.Event.INSERTED);
                  this._popper = new Popper(this.element, tip, {
                    placement: attachment,
                    modifiers: {
                      offset         : {
                        offset: this.config.offset
                      },
                      flip           : {
                        behavior: this.config.fallbackPlacement
                      },
                      arrow          : {
                        element: Selector.ARROW
                      },
                      preventOverflow: {
                        boundariesElement: this.config.boundary
                      }
                    },
                    onCreate : function onCreate(data) {
                      if (data.originalPlacement !== data.placement) {
                        _this._handlePopperPlacementChange(data);
                      }
                    },
                    onUpdate : function onUpdate(data) {
                      _this._handlePopperPlacementChange(data);
                    }
                  });
                  $$$1(tip).addClass(ClassName.SHOW); // If this is a touch-enabled device we add extra
                  // empty mouseover listeners to the body's immediate children;
                  // only needed because of broken event delegation on iOS
                  // https://www.quirksmode.org/blog/archives/2014/02/mouse_event_bub.html

                  if ('ontouchstart' in document.documentElement) {
                    $$$1('body').children().on('mouseover', null, $$$1.noop);
                  }

                  var complete = function complete() {
                    if (_this.config.animation) {
                      _this._fixTransition();
                    }

                    var prevHoverState = _this._hoverState;
                    _this._hoverState = null;
                    $$$1(_this.element).trigger(_this.constructor.Event.SHOWN);

                    if (prevHoverState === HoverState.OUT) {
                      _this._leave(null, _this);
                    }
                  };

                  if (Util.supportsTransitionEnd() && $$$1(this.tip).hasClass(ClassName.FADE)) {
                    $$$1(this.tip).one(Util.TRANSITION_END, complete).emulateTransitionEnd(Tooltip._TRANSITION_DURATION);
                  } else {
                    complete();
                  }
                }
              };

              _proto.hide = function hide(callback) {
                var _this2 = this;

                var tip = this.getTipElement();
                var hideEvent = $$$1.Event(this.constructor.Event.HIDE);

                var complete = function complete() {
                  if (_this2._hoverState !== HoverState.SHOW && tip.parentNode) {
                    tip.parentNode.removeChild(tip);
                  }

                  _this2._cleanTipClass();

                  _this2.element.removeAttribute('aria-describedby');

                  $$$1(_this2.element).trigger(_this2.constructor.Event.HIDDEN);

                  if (_this2._popper !== null) {
                    _this2._popper.destroy();
                  }

                  if (callback) {
                    callback();
                  }
                };

                $$$1(this.element).trigger(hideEvent);

                if (hideEvent.isDefaultPrevented()) {
                  return;
                }

                $$$1(tip).removeClass(ClassName.SHOW); // If this is a touch-enabled device we remove the extra
                // empty mouseover listeners we added for iOS support

                if ('ontouchstart' in document.documentElement) {
                  $$$1('body').children().off('mouseover', null, $$$1.noop);
                }

                this._activeTrigger[Trigger.CLICK] = false;
                this._activeTrigger[Trigger.FOCUS] = false;
                this._activeTrigger[Trigger.HOVER] = false;

                if (Util.supportsTransitionEnd() && $$$1(this.tip).hasClass(ClassName.FADE)) {
                  $$$1(tip).one(Util.TRANSITION_END, complete).emulateTransitionEnd(TRANSITION_DURATION);
                } else {
                  complete();
                }

                this._hoverState = '';
              };

              _proto.update = function update() {
                if (this._popper !== null) {
                  this._popper.scheduleUpdate();
                }
              }; // Protected

              _proto.isWithContent = function isWithContent() {
                return Boolean(this.getTitle());
              };

              _proto.addAttachmentClass = function addAttachmentClass(attachment) {
                $$$1(this.getTipElement()).addClass(CLASS_PREFIX + '-' + attachment);
              };

              _proto.getTipElement = function getTipElement() {
                this.tip = this.tip || $$$1(this.config.template)[0];
                return this.tip;
              };

              _proto.setContent = function setContent() {
                var $tip = $$$1(this.getTipElement());
                this.setElementContent($tip.find(Selector.TOOLTIP_INNER), this.getTitle());
                $tip.removeClass(ClassName.FADE + ' ' + ClassName.SHOW);
              };

              _proto.setElementContent = function setElementContent($element, content) {
                var html = this.config.html;

                if (typeof content === 'object' && (content.nodeType || content.jquery)) {
                  // Content is a DOM node or a jQuery
                  if (html) {
                    if (!$$$1(content).parent().is($element)) {
                      $element.empty().append(content);
                    }
                  } else {
                    $element.text($$$1(content).text());
                  }
                } else {
                  $element[html ? 'html' : 'text'](content);
                }
              };

              _proto.getTitle = function getTitle() {
                var title = this.element.getAttribute('data-original-title');

                if (!title) {
                  title = typeof this.config.title === 'function' ? this.config.title.call(this.element) : this.config.title;
                }

                return title;
              }; // Private

              _proto._getAttachment = function _getAttachment(placement) {
                return AttachmentMap[placement.toUpperCase()];
              };

              _proto._setListeners = function _setListeners() {
                var _this3 = this;

                var triggers = this.config.trigger.split(' ');
                triggers.forEach(function(trigger) {
                  if (trigger === 'click') {
                    $$$1(_this3.element).on(_this3.constructor.Event.CLICK, _this3.config.selector, function(event) {
                      return _this3.toggle(event);
                    });
                  } else if (trigger !== Trigger.MANUAL) {
                    var eventIn = trigger === Trigger.HOVER ? _this3.constructor.Event.MOUSEENTER : _this3.constructor.Event.FOCUSIN;
                    var eventOut = trigger === Trigger.HOVER ? _this3.constructor.Event.MOUSELEAVE : _this3.constructor.Event.FOCUSOUT;
                    $$$1(_this3.element).on(eventIn, _this3.config.selector, function(event) {
                      return _this3._enter(event);
                    }).on(eventOut, _this3.config.selector, function(event) {
                      return _this3._leave(event);
                    });
                  }

                  $$$1(_this3.element).closest('.modal').on('hide.bs.modal', function() {
                    return _this3.hide();
                  });
                });

                if (this.config.selector) {
                  this.config = _extends({}, this.config, {
                    trigger : 'manual',
                    selector: ''
                  });
                } else {
                  this._fixTitle();
                }
              };

              _proto._fixTitle = function _fixTitle() {
                var titleType = typeof this.element.getAttribute('data-original-title');

                if (this.element.getAttribute('title') || titleType !== 'string') {
                  this.element.setAttribute('data-original-title', this.element.getAttribute('title') || '');
                  this.element.setAttribute('title', '');
                }
              };

              _proto._enter = function _enter(event, context) {
                var dataKey = this.constructor.DATA_KEY;
                context = context || $$$1(event.currentTarget).data(dataKey);

                if (!context) {
                  context = new this.constructor(event.currentTarget, this._getDelegateConfig());
                  $$$1(event.currentTarget).data(dataKey, context);
                }

                if (event) {
                  context._activeTrigger[event.type === 'focusin' ? Trigger.FOCUS : Trigger.HOVER] = true;
                }

                if ($$$1(context.getTipElement()).hasClass(ClassName.SHOW) || context._hoverState === HoverState.SHOW) {
                  context._hoverState = HoverState.SHOW;
                  return;
                }

                clearTimeout(context._timeout);
                context._hoverState = HoverState.SHOW;

                if (!context.config.delay || !context.config.delay.show) {
                  context.show();
                  return;
                }

                context._timeout = setTimeout(function() {
                  if (context._hoverState === HoverState.SHOW) {
                    context.show();
                  }
                }, context.config.delay.show);
              };

              _proto._leave = function _leave(event, context) {
                var dataKey = this.constructor.DATA_KEY;
                context = context || $$$1(event.currentTarget).data(dataKey);

                if (!context) {
                  context = new this.constructor(event.currentTarget, this._getDelegateConfig());
                  $$$1(event.currentTarget).data(dataKey, context);
                }

                if (event) {
                  context._activeTrigger[event.type === 'focusout' ? Trigger.FOCUS : Trigger.HOVER] = false;
                }

                if (context._isWithActiveTrigger()) {
                  return;
                }

                clearTimeout(context._timeout);
                context._hoverState = HoverState.OUT;

                if (!context.config.delay || !context.config.delay.hide) {
                  context.hide();
                  return;
                }

                context._timeout = setTimeout(function() {
                  if (context._hoverState === HoverState.OUT) {
                    context.hide();
                  }
                }, context.config.delay.hide);
              };

              _proto._isWithActiveTrigger = function _isWithActiveTrigger() {
                for (var trigger in this._activeTrigger) {
                  if (this._activeTrigger[trigger]) {
                    return true;
                  }
                }

                return false;
              };

              _proto._getConfig = function _getConfig(config) {
                config = _extends({}, this.constructor.Default, $$$1(this.element).data(), config);

                if (typeof config.delay === 'number') {
                  config.delay = {
                    show: config.delay,
                    hide: config.delay
                  };
                }

                if (typeof config.title === 'number') {
                  config.title = config.title.toString();
                }

                if (typeof config.content === 'number') {
                  config.content = config.content.toString();
                }

                Util.typeCheckConfig(NAME, config, this.constructor.DefaultType);
                return config;
              };

              _proto._getDelegateConfig = function _getDelegateConfig() {
                var config = {};

                if (this.config) {
                  for (var key in this.config) {
                    if (this.constructor.Default[key] !== this.config[key]) {
                      config[key] = this.config[key];
                    }
                  }
                }

                return config;
              };

              _proto._cleanTipClass = function _cleanTipClass() {
                var $tip = $$$1(this.getTipElement());
                var tabClass = $tip.attr('class').match(BSCLS_PREFIX_REGEX);

                if (tabClass !== null && tabClass.length > 0) {
                  $tip.removeClass(tabClass.join(''));
                }
              };

              _proto._handlePopperPlacementChange = function _handlePopperPlacementChange(data) {
                this._cleanTipClass();

                this.addAttachmentClass(this._getAttachment(data.placement));
              };

              _proto._fixTransition = function _fixTransition() {
                var tip = this.getTipElement();
                var initConfigAnimation = this.config.animation;

                if (tip.getAttribute('x-placement') !== null) {
                  return;
                }

                $$$1(tip).removeClass(ClassName.FADE);
                this.config.animation = false;
                this.hide();
                this.show();
                this.config.animation = initConfigAnimation;
              }; // Static

              Tooltip._jQueryInterface = function _jQueryInterface(config) {
                return this.each(function() {
                  var data = $$$1(this).data(DATA_KEY);

                  var _config = typeof config === 'object' && config;

                  if (!data && /dispose|hide/.test(config)) {
                    return;
                  }

                  if (!data) {
                    data = new Tooltip(this, _config);
                    $$$1(this).data(DATA_KEY, data);
                  }

                  if (typeof config === 'string') {
                    if (typeof data[config] === 'undefined') {
                      throw new TypeError('No method named "' + config + '"');
                    }

                    data[config]();
                  }
                });
              };

              _createClass(Tooltip, null, [
                {
                  key: 'VERSION',
                  get: function get() {
                    return VERSION;
                  }
                },
                {
                  key: 'Default',
                  get: function get() {
                    return Default;
                  }
                },
                {
                  key: 'NAME',
                  get: function get() {
                    return NAME;
                  }
                },
                {
                  key: 'DATA_KEY',
                  get: function get() {
                    return DATA_KEY;
                  }
                },
                {
                  key: 'Event',
                  get: function get() {
                    return Event;
                  }
                },
                {
                  key: 'EVENT_KEY',
                  get: function get() {
                    return EVENT_KEY;
                  }
                },
                {
                  key: 'DefaultType',
                  get: function get() {
                    return DefaultType;
                  }
                }
              ]);
              return Tooltip;
            }();
    /**
     * ------------------------------------------------------------------------
     * jQuery
     * ------------------------------------------------------------------------
     */

    $$$1.fn[NAME] = Tooltip._jQueryInterface;
    $$$1.fn[NAME].Constructor = Tooltip;

    $$$1.fn[NAME].noConflict = function() {
      $$$1.fn[NAME] = JQUERY_NO_CONFLICT;
      return Tooltip._jQueryInterface;
    };

    return Tooltip;
  }($, Popper);

  /**
   * --------------------------------------------------------------------------
   * Bootstrap (v4.0.0-alpha.6): index.js
   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
   * --------------------------------------------------------------------------
   */

  (function($$$1) {
    if (typeof $$$1 === 'undefined') {
      throw new TypeError('Bootstrap\'s JavaScript requires jQuery. jQuery must be included before Bootstrap\'s JavaScript.');
    }

    var version = $$$1.fn.jquery.split(' ')[0].split('.');
    var minMajor = 1;
    var ltMajor = 2;
    var minMinor = 9;
    var minPatch = 1;
    var maxMajor = 4;

    if (version[0] < ltMajor && version[1] < minMinor || version[0] === minMajor && version[1] === minMinor && version[2] < minPatch || version[0] >= maxMajor) {
      throw new Error('Bootstrap\'s JavaScript requires at least jQuery v1.9.1 but less than v4.0.0');
    }
  })($);

  exports.Util = Util;
  exports.Tooltip = Tooltip;

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

})));