bk-magic-vue/lib/directives/tooltips.js

基于蓝鲸 Magicbox 和 Vue 的前端组件库

(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('vue')) :
  typeof define === 'function' && define.amd ? define(['exports', 'vue'], factory) :
  (global = global || self, factory(global.library = {}, global.Vue));
}(this, function (exports, Vue) { 'use strict';

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

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

    return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (obj) {
      return typeof obj;
    } : function (obj) {
      return obj && "function" == typeof Symbol && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
    }, _typeof(obj);
  }
  function _classCallCheck(instance, Constructor) {
    if (!(instance instanceof Constructor)) {
      throw new TypeError("Cannot call a class as a function");
    }
  }
  function _defineProperties(target, props) {
    for (var i = 0; i < props.length; i++) {
      var descriptor = props[i];
      descriptor.enumerable = descriptor.enumerable || false;
      descriptor.configurable = true;
      if ("value" in descriptor) descriptor.writable = true;
      Object.defineProperty(target, _toPropertyKey(descriptor.key), descriptor);
    }
  }
  function _createClass(Constructor, protoProps, staticProps) {
    if (protoProps) _defineProperties(Constructor.prototype, protoProps);
    if (staticProps) _defineProperties(Constructor, staticProps);
    Object.defineProperty(Constructor, "prototype", {
      writable: false
    });
    return Constructor;
  }
  function _defineProperty(obj, key, value) {
    key = _toPropertyKey(key);
    if (key in obj) {
      Object.defineProperty(obj, key, {
        value: value,
        enumerable: true,
        configurable: true,
        writable: true
      });
    } else {
      obj[key] = value;
    }
    return obj;
  }
  function _extends() {
    _extends = Object.assign ? Object.assign.bind() : 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 _objectSpread(target) {
    for (var i = 1; i < arguments.length; i++) {
      var source = arguments[i] != null ? Object(arguments[i]) : {};
      var ownKeys = Object.keys(source);
      if (typeof Object.getOwnPropertySymbols === 'function') {
        ownKeys.push.apply(ownKeys, Object.getOwnPropertySymbols(source).filter(function (sym) {
          return Object.getOwnPropertyDescriptor(source, sym).enumerable;
        }));
      }
      ownKeys.forEach(function (key) {
        _defineProperty(target, key, source[key]);
      });
    }
    return target;
  }
  function _toPrimitive(input, hint) {
    if (typeof input !== "object" || input === null) return input;
    var prim = input[Symbol.toPrimitive];
    if (prim !== undefined) {
      var res = prim.call(input, hint || "default");
      if (typeof res !== "object") return res;
      throw new TypeError("@@toPrimitive must return a primitive value.");
    }
    return (hint === "string" ? String : Number)(input);
  }
  function _toPropertyKey(arg) {
    var key = _toPrimitive(arg, "string");
    return typeof key === "symbol" ? key : String(key);
  }

  function createCommonjsModule(fn, module) {
  	return module = { exports: {} }, fn(module, module.exports), module.exports;
  }

  var _global = createCommonjsModule(function (module) {
  var global = module.exports = typeof window != 'undefined' && window.Math == Math
    ? window : typeof self != 'undefined' && self.Math == Math ? self
    : Function('return this')();
  if (typeof __g == 'number') __g = global;
  });

  var _core = createCommonjsModule(function (module) {
  var core = module.exports = { version: '2.6.12' };
  if (typeof __e == 'number') __e = core;
  });
  var _core_1 = _core.version;

  var _aFunction = function (it) {
    if (typeof it != 'function') throw TypeError(it + ' is not a function!');
    return it;
  };

  var _ctx = function (fn, that, length) {
    _aFunction(fn);
    if (that === undefined) return fn;
    switch (length) {
      case 1: return function (a) {
        return fn.call(that, a);
      };
      case 2: return function (a, b) {
        return fn.call(that, a, b);
      };
      case 3: return function (a, b, c) {
        return fn.call(that, a, b, c);
      };
    }
    return function () {
      return fn.apply(that, arguments);
    };
  };

  var _isObject = function (it) {
    return typeof it === 'object' ? it !== null : typeof it === 'function';
  };

  var _anObject = function (it) {
    if (!_isObject(it)) throw TypeError(it + ' is not an object!');
    return it;
  };

  var _fails = function (exec) {
    try {
      return !!exec();
    } catch (e) {
      return true;
    }
  };

  var _descriptors = !_fails(function () {
    return Object.defineProperty({}, 'a', { get: function () { return 7; } }).a != 7;
  });

  var document$1 = _global.document;
  var is = _isObject(document$1) && _isObject(document$1.createElement);
  var _domCreate = function (it) {
    return is ? document$1.createElement(it) : {};
  };

  var _ie8DomDefine = !_descriptors && !_fails(function () {
    return Object.defineProperty(_domCreate('div'), 'a', { get: function () { return 7; } }).a != 7;
  });

  var _toPrimitive$1 = function (it, S) {
    if (!_isObject(it)) return it;
    var fn, val;
    if (S && typeof (fn = it.toString) == 'function' && !_isObject(val = fn.call(it))) return val;
    if (typeof (fn = it.valueOf) == 'function' && !_isObject(val = fn.call(it))) return val;
    if (!S && typeof (fn = it.toString) == 'function' && !_isObject(val = fn.call(it))) return val;
    throw TypeError("Can't convert object to primitive value");
  };

  var dP = Object.defineProperty;
  var f = _descriptors ? Object.defineProperty : function defineProperty(O, P, Attributes) {
    _anObject(O);
    P = _toPrimitive$1(P, true);
    _anObject(Attributes);
    if (_ie8DomDefine) try {
      return dP(O, P, Attributes);
    } catch (e) {  }
    if ('get' in Attributes || 'set' in Attributes) throw TypeError('Accessors not supported!');
    if ('value' in Attributes) O[P] = Attributes.value;
    return O;
  };
  var _objectDp = {
  	f: f
  };

  var _propertyDesc = function (bitmap, value) {
    return {
      enumerable: !(bitmap & 1),
      configurable: !(bitmap & 2),
      writable: !(bitmap & 4),
      value: value
    };
  };

  var _hide = _descriptors ? function (object, key, value) {
    return _objectDp.f(object, key, _propertyDesc(1, value));
  } : function (object, key, value) {
    object[key] = value;
    return object;
  };

  var hasOwnProperty = {}.hasOwnProperty;
  var _has = function (it, key) {
    return hasOwnProperty.call(it, key);
  };

  var PROTOTYPE = 'prototype';
  var $export = function (type, name, source) {
    var IS_FORCED = type & $export.F;
    var IS_GLOBAL = type & $export.G;
    var IS_STATIC = type & $export.S;
    var IS_PROTO = type & $export.P;
    var IS_BIND = type & $export.B;
    var IS_WRAP = type & $export.W;
    var exports = IS_GLOBAL ? _core : _core[name] || (_core[name] = {});
    var expProto = exports[PROTOTYPE];
    var target = IS_GLOBAL ? _global : IS_STATIC ? _global[name] : (_global[name] || {})[PROTOTYPE];
    var key, own, out;
    if (IS_GLOBAL) source = name;
    for (key in source) {
      own = !IS_FORCED && target && target[key] !== undefined;
      if (own && _has(exports, key)) continue;
      out = own ? target[key] : source[key];
      exports[key] = IS_GLOBAL && typeof target[key] != 'function' ? source[key]
      : IS_BIND && own ? _ctx(out, _global)
      : IS_WRAP && target[key] == out ? (function (C) {
        var F = function (a, b, c) {
          if (this instanceof C) {
            switch (arguments.length) {
              case 0: return new C();
              case 1: return new C(a);
              case 2: return new C(a, b);
            } return new C(a, b, c);
          } return C.apply(this, arguments);
        };
        F[PROTOTYPE] = C[PROTOTYPE];
        return F;
      })(out) : IS_PROTO && typeof out == 'function' ? _ctx(Function.call, out) : out;
      if (IS_PROTO) {
        (exports.virtual || (exports.virtual = {}))[key] = out;
        if (type & $export.R && expProto && !expProto[key]) _hide(expProto, key, out);
      }
    }
  };
  $export.F = 1;
  $export.G = 2;
  $export.S = 4;
  $export.P = 8;
  $export.B = 16;
  $export.W = 32;
  $export.U = 64;
  $export.R = 128;
  var _export = $export;

  var _defined = function (it) {
    if (it == undefined) throw TypeError("Can't call method on  " + it);
    return it;
  };

  var _stringWs = '\x09\x0A\x0B\x0C\x0D\x20\xA0\u1680\u180E\u2000\u2001\u2002\u2003' +
    '\u2004\u2005\u2006\u2007\u2008\u2009\u200A\u202F\u205F\u3000\u2028\u2029\uFEFF';

  var space = '[' + _stringWs + ']';
  var non = '\u200b\u0085';
  var ltrim = RegExp('^' + space + space + '*');
  var rtrim = RegExp(space + space + '*$');
  var exporter = function (KEY, exec, ALIAS) {
    var exp = {};
    var FORCE = _fails(function () {
      return !!_stringWs[KEY]() || non[KEY]() != non;
    });
    var fn = exp[KEY] = FORCE ? exec(trim) : _stringWs[KEY];
    if (ALIAS) exp[ALIAS] = fn;
    _export(_export.P + _export.F * FORCE, 'String', exp);
  };
  var trim = exporter.trim = function (string, TYPE) {
    string = String(_defined(string));
    if (TYPE & 1) string = string.replace(ltrim, '');
    if (TYPE & 2) string = string.replace(rtrim, '');
    return string;
  };
  var _stringTrim = exporter;

  var $parseInt = _global.parseInt;
  var $trim = _stringTrim.trim;
  var hex = /^[-+]?0[xX]/;
  var _parseInt = $parseInt(_stringWs + '08') !== 8 || $parseInt(_stringWs + '0x16') !== 22 ? function parseInt(str, radix) {
    var string = $trim(String(str), 3);
    return $parseInt(string, (radix >>> 0) || (hex.test(string) ? 16 : 10));
  } : $parseInt;

  _export(_export.G + _export.F * (parseInt != _parseInt), { parseInt: _parseInt });

  var _parseInt$1 = _core.parseInt;

  var _parseInt$2 = _parseInt$1;

  var toString = {}.toString;
  var _cof = function (it) {
    return toString.call(it).slice(8, -1);
  };

  var _isArray = Array.isArray || function isArray(arg) {
    return _cof(arg) == 'Array';
  };

  _export(_export.S, 'Array', { isArray: _isArray });

  var isArray = _core.Array.isArray;

  var isArray$1 = isArray;

  var _toObject = function (it) {
    return Object(_defined(it));
  };

  var _iobject = Object('z').propertyIsEnumerable(0) ? Object : function (it) {
    return _cof(it) == 'String' ? it.split('') : Object(it);
  };

  var _toIobject = function (it) {
    return _iobject(_defined(it));
  };

  var ceil = Math.ceil;
  var floor = Math.floor;
  var _toInteger = function (it) {
    return isNaN(it = +it) ? 0 : (it > 0 ? floor : ceil)(it);
  };

  var min = Math.min;
  var _toLength = function (it) {
    return it > 0 ? min(_toInteger(it), 0x1fffffffffffff) : 0;
  };

  var max = Math.max;
  var min$1 = Math.min;
  var _toAbsoluteIndex = function (index, length) {
    index = _toInteger(index);
    return index < 0 ? max(index + length, 0) : min$1(index, length);
  };

  var _arrayIncludes = function (IS_INCLUDES) {
    return function ($this, el, fromIndex) {
      var O = _toIobject($this);
      var length = _toLength(O.length);
      var index = _toAbsoluteIndex(fromIndex, length);
      var value;
      if (IS_INCLUDES && el != el) while (length > index) {
        value = O[index++];
        if (value != value) return true;
      } else for (;length > index; index++) if (IS_INCLUDES || index in O) {
        if (O[index] === el) return IS_INCLUDES || index || 0;
      } return !IS_INCLUDES && -1;
    };
  };

  var _shared = createCommonjsModule(function (module) {
  var SHARED = '__core-js_shared__';
  var store = _global[SHARED] || (_global[SHARED] = {});
  (module.exports = function (key, value) {
    return store[key] || (store[key] = value !== undefined ? value : {});
  })('versions', []).push({
    version: _core.version,
    mode:  'pure' ,
    copyright: '© 2020 Denis Pushkarev (zloirock.ru)'
  });
  });

  var id = 0;
  var px = Math.random();
  var _uid = function (key) {
    return 'Symbol('.concat(key === undefined ? '' : key, ')_', (++id + px).toString(36));
  };

  var shared = _shared('keys');
  var _sharedKey = function (key) {
    return shared[key] || (shared[key] = _uid(key));
  };

  var arrayIndexOf = _arrayIncludes(false);
  var IE_PROTO = _sharedKey('IE_PROTO');
  var _objectKeysInternal = function (object, names) {
    var O = _toIobject(object);
    var i = 0;
    var result = [];
    var key;
    for (key in O) if (key != IE_PROTO) _has(O, key) && result.push(key);
    while (names.length > i) if (_has(O, key = names[i++])) {
      ~arrayIndexOf(result, key) || result.push(key);
    }
    return result;
  };

  var _enumBugKeys = (
    'constructor,hasOwnProperty,isPrototypeOf,propertyIsEnumerable,toLocaleString,toString,valueOf'
  ).split(',');

  var _objectKeys = Object.keys || function keys(O) {
    return _objectKeysInternal(O, _enumBugKeys);
  };

  var _objectSap = function (KEY, exec) {
    var fn = (_core.Object || {})[KEY] || Object[KEY];
    var exp = {};
    exp[KEY] = exec(fn);
    _export(_export.S + _export.F * _fails(function () { fn(1); }), 'Object', exp);
  };

  _objectSap('keys', function () {
    return function keys(it) {
      return _objectKeys(_toObject(it));
    };
  });

  var keys = _core.Object.keys;

  var keys$1 = keys;

  var f$1 = Object.getOwnPropertySymbols;
  var _objectGops = {
  	f: f$1
  };

  var f$2 = {}.propertyIsEnumerable;
  var _objectPie = {
  	f: f$2
  };

  var $assign = Object.assign;
  var _objectAssign = !$assign || _fails(function () {
    var A = {};
    var B = {};
    var S = Symbol();
    var K = 'abcdefghijklmnopqrst';
    A[S] = 7;
    K.split('').forEach(function (k) { B[k] = k; });
    return $assign({}, A)[S] != 7 || Object.keys($assign({}, B)).join('') != K;
  }) ? function assign(target, source) {
    var T = _toObject(target);
    var aLen = arguments.length;
    var index = 1;
    var getSymbols = _objectGops.f;
    var isEnum = _objectPie.f;
    while (aLen > index) {
      var S = _iobject(arguments[index++]);
      var keys = getSymbols ? _objectKeys(S).concat(getSymbols(S)) : _objectKeys(S);
      var length = keys.length;
      var j = 0;
      var key;
      while (length > j) {
        key = keys[j++];
        if (!_descriptors || isEnum.call(S, key)) T[key] = S[key];
      }
    } return T;
  } : $assign;

  _export(_export.S + _export.F, 'Object', { assign: _objectAssign });

  var assign = _core.Object.assign;

  var assign$1 = assign;

  var $parseFloat = _global.parseFloat;
  var $trim$1 = _stringTrim.trim;
  var _parseFloat = 1 / $parseFloat(_stringWs + '-0') !== -Infinity ? function parseFloat(str) {
    var string = $trim$1(String(str), 3);
    var result = $parseFloat(string);
    return result === 0 && string.charAt(0) == '-' ? -0 : result;
  } : $parseFloat;

  _export(_export.G + _export.F * (parseFloat != _parseFloat), { parseFloat: _parseFloat });

  var _parseFloat$1 = _core.parseFloat;

  var _parseFloat$2 = _parseFloat$1;

  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;
  var debounce = supportsMicroTasks ? microtaskDebounce : taskDebounce;
  function isFunction(functionToCheck) {
    var getType = {};
    return functionToCheck && getType.toString.call(functionToCheck) === '[object Function]';
  }
  function getStyleComputedProperty(element, property) {
    if (element.nodeType !== 1) {
      return [];
    }
    var window = element.ownerDocument.defaultView;
    var css = window.getComputedStyle(element, null);
    return property ? css[property] : css;
  }
  function getParentNode(element) {
    if (element.nodeName === 'HTML') {
      return element;
    }
    return element.parentNode || element.host;
  }
  function getScrollParent(element) {
    if (!element) {
      return document.body;
    }
    switch (element.nodeName) {
      case 'HTML':
      case 'BODY':
        return element.ownerDocument.body;
      case '#document':
        return element.body;
    }
    var _getStyleComputedProp = getStyleComputedProperty(element),
      overflow = _getStyleComputedProp.overflow,
      overflowX = _getStyleComputedProp.overflowX,
      overflowY = _getStyleComputedProp.overflowY;
    if (/(auto|scroll|overlay)/.test(overflow + overflowY + overflowX)) {
      return element;
    }
    return getScrollParent(getParentNode(element));
  }
  var isIE11 = isBrowser && !!(window.MSInputMethodContext && document.documentMode);
  var isIE10 = isBrowser && /MSIE 10/.test(navigator.userAgent);
  function isIE(version) {
    if (version === 11) {
      return isIE11;
    }
    if (version === 10) {
      return isIE10;
    }
    return isIE11 || isIE10;
  }
  function getOffsetParent(element) {
    if (!element) {
      return document.documentElement;
    }
    var noOffsetParent = isIE(10) ? document.body : null;
    var offsetParent = element.offsetParent || null;
    while (offsetParent === noOffsetParent && element.nextElementSibling) {
      offsetParent = (element = element.nextElementSibling).offsetParent;
    }
    var nodeName = offsetParent && offsetParent.nodeName;
    if (!nodeName || nodeName === 'BODY' || nodeName === 'HTML') {
      return element ? element.ownerDocument.documentElement : document.documentElement;
    }
    if (['TH', 'TD', 'TABLE'].indexOf(offsetParent.nodeName) !== -1 && getStyleComputedProperty(offsetParent, 'position') === 'static') {
      return getOffsetParent(offsetParent);
    }
    return offsetParent;
  }
  function isOffsetContainer(element) {
    var nodeName = element.nodeName;
    if (nodeName === 'BODY') {
      return false;
    }
    return nodeName === 'HTML' || getOffsetParent(element.firstElementChild) === element;
  }
  function getRoot(node) {
    if (node.parentNode !== null) {
      return getRoot(node.parentNode);
    }
    return node;
  }
  function findCommonOffsetParent(element1, element2) {
    if (!element1 || !element1.nodeType || !element2 || !element2.nodeType) {
      return document.documentElement;
    }
    var order = element1.compareDocumentPosition(element2) & Node.DOCUMENT_POSITION_FOLLOWING;
    var start = order ? element1 : element2;
    var end = order ? element2 : element1;
    var range = document.createRange();
    range.setStart(start, 0);
    range.setEnd(end, 0);
    var commonAncestorContainer = range.commonAncestorContainer;
    if (element1 !== commonAncestorContainer && element2 !== commonAncestorContainer || start.contains(end)) {
      if (isOffsetContainer(commonAncestorContainer)) {
        return commonAncestorContainer;
      }
      return getOffsetParent(commonAncestorContainer);
    }
    var element1root = getRoot(element1);
    if (element1root.host) {
      return findCommonOffsetParent(element1root.host, element2);
    } else {
      return findCommonOffsetParent(element1, getRoot(element2).host);
    }
  }
  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];
  }
  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;
  }
  function getBordersSize(styles, axis) {
    var sideA = axis === 'x' ? 'Left' : 'Top';
    var sideB = sideA === 'Left' ? 'Right' : 'Bottom';
    return _parseFloat$2(styles["border".concat(sideA, "Width")], 10) + _parseFloat$2(styles["border".concat(sideB, "Width")], 10);
  }
  function getSize(axis, body, html, computedStyle) {
    return Math.max(body["offset".concat(axis)], body["scroll".concat(axis)], html["client".concat(axis)], html["offset".concat(axis)], html["scroll".concat(axis)], isIE(10) ? _parseInt$2(html["offset".concat(axis)]) + _parseInt$2(computedStyle["margin".concat(axis === 'Height' ? 'Top' : 'Left')]) + _parseInt$2(computedStyle["margin".concat(axis === 'Height' ? 'Bottom' : 'Right')]) : 0);
  }
  function getWindowSizes(document) {
    var body = document.body;
    var html = document.documentElement;
    var computedStyle = isIE(10) && getComputedStyle(html);
    return {
      height: getSize('Height', body, html, computedStyle),
      width: getSize('Width', body, html, computedStyle)
    };
  }
  var _extends$1 = assign$1 || 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;
  };
  function getClientRect(offsets) {
    return _extends$1({}, offsets, {
      right: offsets.left + offsets.width,
      bottom: offsets.top + offsets.height
    });
  }
  function getBoundingClientRect(element) {
    var rect = {};
    try {
      if (isIE(10)) {
        rect = element.getBoundingClientRect();
        var scrollTop = getScroll(element, 'top');
        var scrollLeft = getScroll(element, 'left');
        rect.top += scrollTop;
        rect.left += scrollLeft;
        rect.bottom += scrollTop;
        rect.right += scrollLeft;
      } else {
        rect = element.getBoundingClientRect();
      }
    } catch (e) {}
    var result = {
      left: rect.left,
      top: rect.top,
      width: rect.right - rect.left,
      height: rect.bottom - rect.top
    };
    var sizes = element.nodeName === 'HTML' ? getWindowSizes(element.ownerDocument) : {};
    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 (horizScrollbar || vertScrollbar) {
      var styles = getStyleComputedProperty(element);
      horizScrollbar -= getBordersSize(styles, 'x');
      vertScrollbar -= getBordersSize(styles, 'y');
      result.width -= horizScrollbar;
      result.height -= vertScrollbar;
    }
    return getClientRect(result);
  }
  function getOffsetRectRelativeToArbitraryNode(children, parent) {
    var fixedPosition = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : false;
    var isIE10 = isIE(10);
    var isHTML = parent.nodeName === 'HTML';
    var childrenRect = getBoundingClientRect(children);
    var parentRect = getBoundingClientRect(parent);
    var scrollParent = getScrollParent(children);
    var styles = getStyleComputedProperty(parent);
    var borderTopWidth = _parseFloat$2(styles.borderTopWidth, 10);
    var borderLeftWidth = _parseFloat$2(styles.borderLeftWidth, 10);
    if (fixedPosition && isHTML) {
      parentRect.top = Math.max(parentRect.top, 0);
      parentRect.left = Math.max(parentRect.left, 0);
    }
    var offsets = getClientRect({
      top: childrenRect.top - parentRect.top - borderTopWidth,
      left: childrenRect.left - parentRect.left - borderLeftWidth,
      width: childrenRect.width,
      height: childrenRect.height
    });
    offsets.marginTop = 0;
    offsets.marginLeft = 0;
    if (!isIE10 && isHTML) {
      var marginTop = _parseFloat$2(styles.marginTop, 10);
      var marginLeft = _parseFloat$2(styles.marginLeft, 10);
      offsets.top -= borderTopWidth - marginTop;
      offsets.bottom -= borderTopWidth - marginTop;
      offsets.left -= borderLeftWidth - marginLeft;
      offsets.right -= borderLeftWidth - marginLeft;
      offsets.marginTop = marginTop;
      offsets.marginLeft = marginLeft;
    }
    if (isIE10 && !fixedPosition ? parent.contains(scrollParent) : parent === scrollParent && scrollParent.nodeName !== 'BODY') {
      offsets = includeScroll(offsets, parent);
    }
    return offsets;
  }
  function getViewportOffsetRectRelativeToArtbitraryNode(element) {
    var excludeScroll = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;
    var html = element.ownerDocument.documentElement;
    var relativeOffset = getOffsetRectRelativeToArbitraryNode(element, html);
    var width = Math.max(html.clientWidth, window.innerWidth || 0);
    var height = Math.max(html.clientHeight, window.innerHeight || 0);
    var scrollTop = !excludeScroll ? getScroll(html) : 0;
    var scrollLeft = !excludeScroll ? getScroll(html, 'left') : 0;
    var offset = {
      top: scrollTop - relativeOffset.top + relativeOffset.marginTop,
      left: scrollLeft - relativeOffset.left + relativeOffset.marginLeft,
      width: width,
      height: height
    };
    return getClientRect(offset);
  }
  function isFixed(element) {
    var nodeName = element.nodeName;
    if (nodeName === 'BODY' || nodeName === 'HTML') {
      return false;
    }
    if (getStyleComputedProperty(element, 'position') === 'fixed') {
      return true;
    }
    var parentNode = getParentNode(element);
    if (!parentNode) {
      return false;
    }
    return isFixed(parentNode);
  }
  function getFixedPositionOffsetParent(element) {
    if (!element || !element.parentElement || isIE()) {
      return document.documentElement;
    }
    var el = element.parentElement;
    while (el && getStyleComputedProperty(el, 'transform') === 'none') {
      el = el.parentElement;
    }
    return el || document.documentElement;
  }
  function getBoundaries(popper, reference, padding, boundariesElement) {
    var fixedPosition = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : false;
    var boundaries = {
      top: 0,
      left: 0
    };
    var offsetParent = fixedPosition ? getFixedPositionOffsetParent(popper) : findCommonOffsetParent(popper, reference);
    if (boundariesElement === 'viewport') {
      boundaries = getViewportOffsetRectRelativeToArtbitraryNode(offsetParent, fixedPosition);
    } else {
      var boundariesNode;
      if (boundariesElement === 'scrollParent') {
        boundariesNode = getScrollParent(getParentNode(reference));
        if (boundariesNode.nodeName === 'BODY') {
          boundariesNode = popper.ownerDocument.documentElement;
        }
      } else if (boundariesElement === 'window') {
        boundariesNode = popper.ownerDocument.documentElement;
      } else {
        boundariesNode = boundariesElement;
      }
      var offsets = getOffsetRectRelativeToArbitraryNode(boundariesNode, offsetParent, fixedPosition);
      if (boundariesNode.nodeName === 'HTML' && !isFixed(offsetParent)) {
        var _getWindowSizes = getWindowSizes(popper.ownerDocument),
          height = _getWindowSizes.height,
          width = _getWindowSizes.width;
        boundaries.top += offsets.top - offsets.marginTop;
        boundaries.bottom = height + offsets.top;
        boundaries.left += offsets.left - offsets.marginLeft;
        boundaries.right = width + offsets.left;
      } else {
        boundaries = offsets;
      }
    }
    padding = padding || 0;
    var isPaddingNumber = typeof padding === 'number';
    boundaries.left += isPaddingNumber ? padding : padding.left || 0;
    boundaries.top += isPaddingNumber ? padding : padding.top || 0;
    boundaries.right -= isPaddingNumber ? padding : padding.right || 0;
    boundaries.bottom -= isPaddingNumber ? padding : padding.bottom || 0;
    return boundaries;
  }
  function getArea(_ref) {
    var width = _ref.width,
      height = _ref.height;
    return width * height;
  }
  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 = keys$1(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 ? "-".concat(variation) : '');
  }
  function getReferenceOffsets(state, popper, reference) {
    var fixedPosition = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : null;
    var commonOffsetParent = fixedPosition ? getFixedPositionOffsetParent(popper) : findCommonOffsetParent(popper, reference);
    return getOffsetRectRelativeToArbitraryNode(reference, commonOffsetParent, fixedPosition);
  }
  function getOuterSizes(element) {
    var window = element.ownerDocument.defaultView;
    var styles = window.getComputedStyle(element);
    var x = _parseFloat$2(styles.marginTop || 0) + _parseFloat$2(styles.marginBottom || 0);
    var y = _parseFloat$2(styles.marginLeft || 0) + _parseFloat$2(styles.marginRight || 0);
    var result = {
      width: element.offsetWidth + y,
      height: element.offsetHeight + x
    };
    return result;
  }
  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];
    });
  }
  function getPopperOffsets(popper, referenceOffsets, placement) {
    placement = placement.split('-')[0];
    var popperRect = getOuterSizes(popper);
    var popperOffsets = {
      width: popperRect.width,
      height: popperRect.height
    };
    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;
  }
  function find(arr, check) {
    if (Array.prototype.find) {
      return arr.find(check);
    }
    return arr.filter(check)[0];
  }
  function findIndex(arr, prop, value) {
    if (Array.prototype.findIndex) {
      return arr.findIndex(function (cur) {
        return cur[prop] === value;
      });
    }
    var match = find(arr, function (obj) {
      return obj[prop] === value;
    });
    return arr.indexOf(match);
  }
  function runModifiers(modifiers, data, ends) {
    var modifiersToRun = ends === undefined ? modifiers : modifiers.slice(0, findIndex(modifiers, 'name', ends));
    modifiersToRun.forEach(function (modifier) {
      if (modifier['function']) {
        console.warn('`modifier.function` is deprecated, use `modifier.fn`!');
      }
      var fn = modifier['function'] || modifier.fn;
      if (modifier.enabled && isFunction(fn)) {
        data.offsets.popper = getClientRect(data.offsets.popper);
        data.offsets.reference = getClientRect(data.offsets.reference);
        data = fn(data, modifier);
      }
    });
    return data;
  }
  function _update() {
    if (this.state.isDestroyed) {
      return;
    }
    var data = {
      instance: this,
      styles: {},
      arrowStyles: {},
      attributes: {},
      flipped: false,
      offsets: {}
    };
    data.offsets.reference = getReferenceOffsets(this.state, this.popper, this.reference, this.options.positionFixed);
    data.placement = computeAutoPlacement(this.options.placement, data.offsets.reference, this.popper, this.reference, this.options.modifiers.flip.boundariesElement, this.options.modifiers.flip.padding);
    data.originalPlacement = data.placement;
    data.positionFixed = this.options.positionFixed;
    data.offsets.popper = getPopperOffsets(this.popper, data.offsets.reference, data.placement);
    data.offsets.popper.position = this.options.positionFixed ? 'fixed' : 'absolute';
    data = runModifiers(this.modifiers, data);
    if (!this.state.isCreated) {
      this.state.isCreated = true;
      this.options.onCreate(data);
    } else {
      this.options.onUpdate(data);
    }
  }
  function isModifierEnabled(modifiers, modifierName) {
    return modifiers.some(function (_ref3) {
      var name = _ref3.name,
        enabled = _ref3.enabled;
      return enabled && name === modifierName;
    });
  }
  function getSupportedPropertyName(property) {
    var prefixes = [false, 'ms', 'Webkit', 'Moz', 'O'];
    var upperProp = property.charAt(0).toUpperCase() + property.slice(1);
    for (var _i = 0; _i < prefixes.length; _i++) {
      var prefix = prefixes[_i];
      var toCheck = prefix ? "".concat(prefix).concat(upperProp) : property;
      if (typeof document.body.style[toCheck] !== 'undefined') {
        return toCheck;
      }
    }
    return null;
  }
  function _destroy() {
    this.state.isDestroyed = true;
    if (isModifierEnabled(this.modifiers, 'applyStyle')) {
      this.popper.removeAttribute('x-placement');
      this.popper.style.position = '';
      this.popper.style.top = '';
      this.popper.style.left = '';
      this.popper.style.right = '';
      this.popper.style.bottom = '';
      this.popper.style.willChange = '';
      this.popper.style[getSupportedPropertyName('transform')] = '';
    }
    this.disableEventListeners();
    if (this.options.removeOnDestroy) {
      this.popper.parentNode.removeChild(this.popper);
    }
    return this;
  }
  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);
  }
  function setupEventListeners(reference, options, state, updateBound) {
    state.updateBound = updateBound;
    getWindow(reference).addEventListener('resize', state.updateBound, {
      passive: true
    });
    var scrollElement = getScrollParent(reference);
    attachToScrollParents(scrollElement, 'scroll', state.updateBound, state.scrollParents);
    state.scrollElement = scrollElement;
    state.eventsEnabled = true;
    return state;
  }
  function _enableEventListeners() {
    if (!this.state.eventsEnabled) {
      this.state = setupEventListeners(this.reference, this.options, this.state, this.scheduleUpdate);
    }
  }
  function removeEventListeners(reference, state) {
    getWindow(reference).removeEventListener('resize', state.updateBound);
    state.scrollParents.forEach(function (target) {
      target.removeEventListener('scroll', state.updateBound);
    });
    state.updateBound = null;
    state.scrollParents = [];
    state.scrollElement = null;
    state.eventsEnabled = false;
    return state;
  }
  function _disableEventListeners() {
    if (this.state.eventsEnabled) {
      cancelAnimationFrame(this.scheduleUpdate);
      this.state = removeEventListeners(this.reference, this.state);
    }
  }
  function isNumeric(n) {
    return n !== '' && !isNaN(_parseFloat$2(n)) && isFinite(n);
  }
  function setStyles(element, styles) {
    keys$1(styles).forEach(function (prop) {
      var unit = '';
      if (['width', 'height', 'top', 'right', 'bottom', 'left'].indexOf(prop) !== -1 && isNumeric(styles[prop])) {
        unit = 'px';
      }
      element.style[prop] = styles[prop] + unit;
    });
  }
  function setAttributes(element, attributes) {
    keys$1(attributes).forEach(function (prop) {
      var value = attributes[prop];
      if (value !== false) {
        element.setAttribute(prop, attributes[prop]);
      } else {
        element.removeAttribute(prop);
      }
    });
  }
  function applyStyle(data) {
    setStyles(data.instance.popper, data.styles);
    setAttributes(data.instance.popper, data.attributes);
    if (data.arrowElement && keys$1(data.arrowStyles).length) {
      setStyles(data.arrowElement, data.arrowStyles);
    }
    return data;
  }
  function applyStyleOnLoad(reference, popper, options, modifierOptions, state) {
    var referenceOffsets = getReferenceOffsets(state, popper, reference, options.positionFixed);
    var placement = computeAutoPlacement(options.placement, referenceOffsets, popper, reference, options.modifiers.flip.boundariesElement, options.modifiers.flip.padding);
    popper.setAttribute('x-placement', placement);
    setStyles(popper, {
      position: options.positionFixed ? 'fixed' : 'absolute'
    });
    return options;
  }
  function getRoundedOffsets(data, shouldRound) {
    var _data$offsets = data.offsets,
      popper = _data$offsets.popper,
      reference = _data$offsets.reference;
    var round = Math.round,
      floor = Math.floor;
    var noRound = function noRound(v) {
      return v;
    };
    var referenceWidth = round(reference.width);
    var popperWidth = round(popper.width);
    var isVertical = ['left', 'right'].indexOf(data.placement) !== -1;
    var isVariation = data.placement.indexOf('-') !== -1;
    var sameWidthParity = referenceWidth % 2 === popperWidth % 2;
    var bothOddWidth = referenceWidth % 2 === 1 && popperWidth % 2 === 1;
    var horizontalToInteger = !shouldRound ? noRound : isVertical || isVariation || sameWidthParity ? round : floor;
    var verticalToInteger = !shouldRound ? noRound : round;
    return {
      left: horizontalToInteger(bothOddWidth && !isVariation && shouldRound ? popper.left - 1 : popper.left),
      top: verticalToInteger(popper.top),
      bottom: verticalToInteger(popper.bottom),
      right: horizontalToInteger(popper.right)
    };
  }
  var isFirefox = isBrowser && /Firefox/i.test(navigator.userAgent);
  function computeStyle(data, options) {
    var x = options.x,
      y = options.y;
    var popper = data.offsets.popper;
    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);
    var styles = {
      position: popper.position
    };
    var offsets = getRoundedOffsets(data, window.devicePixelRatio < 2 || !isFirefox);
    var sideA = x === 'bottom' ? 'top' : 'bottom';
    var sideB = y === 'right' ? 'left' : 'right';
    var prefixedProperty = getSupportedPropertyName('transform');
    var left, top;
    if (sideA === 'bottom') {
      if (offsetParent.nodeName === 'HTML') {
        top = -offsetParent.clientHeight + offsets.bottom;
      } else {
        top = -offsetParentRect.height + offsets.bottom;
      }
    } else {
      top = offsets.top;
    }
    if (sideB === 'right') {
      if (offsetParent.nodeName === 'HTML') {
        left = -offsetParent.clientWidth + offsets.right;
      } else {
        left = -offsetParentRect.width + offsets.right;
      }
    } else {
      left = offsets.left;
    }
    if (gpuAcceleration && prefixedProperty) {
      styles[prefixedProperty] = "translate3d(".concat(left, "px, ").concat(top, "px, 0)");
      styles[sideA] = 0;
      styles[sideB] = 0;
    } else {
      var invertTop = sideA === 'bottom' ? -1 : 1;
      var invertLeft = sideB === 'right' ? -1 : 1;
      styles[sideA] = top * invertTop;
      styles[sideB] = left * invertLeft;
    }
    var attributes = {
      'x-placement': data.placement
    };
    data.attributes = _extends$1({}, attributes, data.attributes);
    data.styles = _extends$1({}, styles, data.styles);
    data.arrowStyles = _extends$1({}, data.offsets.arrow, data.arrowStyles);
    return data;
  }
  function isModifierRequired(modifiers, requestingName, requestedName) {
    var requesting = find(modifiers, function (_ref4) {
      var name = _ref4.name;
      return name === requestingName;
    });
    var isRequired = !!requesting && modifiers.some(function (modifier) {
      return modifier.name === requestedName && modifier.enabled && modifier.order < requesting.order;
    });
    if (!isRequired) {
      var _requesting = "`".concat(requestingName, "`");
      var requested = "`".concat(requestedName, "`");
      console.warn("".concat(requested, " modifier is required by ").concat(_requesting, " modifier in order to work, be sure to include it before ").concat(_requesting, "!"));
    }
    return isRequired;
  }
  function arrow(data, options) {
    var _data$offsets$arrow;
    if (!isModifierRequired(data.instance.modifiers, 'arrow', 'keepTogether')) {
      return data;
    }
    var arrowElement = options.element;
    if (typeof arrowElement === 'string') {
      arrowElement = data.instance.popper.querySelector(arrowElement);
      if (!arrowElement) {
        return data;
      }
    } else {
      if (!data.instance.popper.contains(arrowElement)) {
        console.warn('WARNING: `arrow.element` must be child of its popper element!');
        return data;
      }
    }
    var placement = data.placement.split('-')[0];
    var _data$offsets2 = data.offsets,
      popper = _data$offsets2.popper,
      reference = _data$offsets2.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];
    if (reference[opSide] - arrowElementSize < popper[side]) {
      data.offsets.popper[side] -= popper[side] - (reference[opSide] - arrowElementSize);
    }
    if (reference[side] + arrowElementSize > popper[opSide]) {
      data.offsets.popper[side] += reference[side] + arrowElementSize - popper[opSide];
    }
    data.offsets.popper = getClientRect(data.offsets.popper);
    var center = reference[side] + reference[len] / 2 - arrowElementSize / 2;
    var css = getStyleComputedProperty(data.instance.popper);
    var popperMarginSide = _parseFloat$2(css["margin".concat(sideCapitalized)], 10);
    var popperBorderSide = _parseFloat$2(css["border".concat(sideCapitalized, "Width")], 10);
    var sideValue = center - data.offsets.popper[side] - popperMarginSide - popperBorderSide;
    sideValue = Math.max(Math.min(popper[len] - arrowElementSize, sideValue), 0);
    data.arrowElement = arrowElement;
    data.offsets.arrow = (_data$offsets$arrow = {}, _defineProperty(_data$offsets$arrow, side, Math.round(sideValue)), _defineProperty(_data$offsets$arrow, altSide, ''), _data$offsets$arrow);
    return data;
  }
  function getOppositeVariation(variation) {
    if (variation === 'end') {
      return 'start';
    } else if (variation === 'start') {
      return 'end';
    }
    return variation;
  }
  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'];
  var validPlacements = placements.slice(3);
  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 flip(data, options) {
    if (isModifierEnabled(data.instance.modifiers, 'inner')) {
      return data;
    }
    if (data.flipped && data.placement === data.originalPlacement) {
      return data;
    }
    var boundaries = getBoundaries(data.instance.popper, data.instance.reference, options.padding, options.boundariesElement, data.positionFixed);
    var placement = data.placement.split('-')[0];
    var placementOpposite = getOppositePlacement(placement);
    var variation = data.placement.split('-')[1] || '';
    var flipOrder = [];
    switch (options.behavior) {
      case BEHAVIORS.FLIP:
        flipOrder = [placement, placementOpposite];
        break;
      case BEHAVIORS.CLOCKWISE:
        flipOrder = clockwise(placement);
        break;
      case BEHAVIORS.COUNTERCLOCKWISE:
        flipOrder = clockwise(placement, true);
        break;
      default:
        flipOrder = options.behavior;
    }
    flipOrder.forEach(function (step, index) {
      if (placement !== step || flipOrder.length === index + 1) {
        return data;
      }
      placement = data.placement.split('-')[0];
      placementOpposite = getOppositePlacement(placement);
      var popperOffsets = data.offsets.popper;
      var refOffsets = data.offsets.reference;
      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;
      var isVertical = ['top', 'bottom'].indexOf(placement) !== -1;
      var flippedVariationByRef = !!options.flipVariations && (isVertical && variation === 'start' && overflowsLeft || isVertical && variation === 'end' && overflowsRight || !isVertical && variation === 'start' && overflowsTop || !isVertical && variation === 'end' && overflowsBottom);
      var flippedVariationByContent = !!options.flipVariationsByContent && (isVertical && variation === 'start' && overflowsRight || isVertical && variation === 'end' && overflowsLeft || !isVertical && variation === 'start' && overflowsBottom || !isVertical && variation === 'end' && overflowsTop);
      var flippedVariation = flippedVariationByRef || flippedVariationByContent;
      if (overlapsRef || overflowsBoundaries || flippedVariation) {
        data.flipped = true;
        if (overlapsRef || overflowsBoundaries) {
          placement = flipOrder[index + 1];
        }
        if (flippedVariation) {
          variation = getOppositeVariation(variation);
        }
        data.placement = pla