vis-timeline/peer/esm/vis-timeline-graph2d.js

Create a fully customizable, interactive timeline with items and ranges.

/**
 * vis-timeline and vis-graph2d
 * https://visjs.github.io/vis-timeline/
 *
 * Create a fully customizable, interactive timeline with items and ranges.
 *
 * @version 7.4.9
 * @date    2021-06-05T17:20:46.148Z
 *
 * @copyright (c) 2011-2017 Almende B.V, http://almende.com
 * @copyright (c) 2017-2019 visjs contributors, https://github.com/visjs
 *
 * @license
 * vis.js is dual licensed under both
 *
 *   1. The Apache 2.0 License
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *   and
 *
 *   2. The MIT License
 *      http://opensource.org/licenses/MIT
 *
 * vis.js may be distributed under either license.
 */

import moment$3 from 'moment';
import { DataSet, createNewDataPipeFrom, isDataViewLike, DataView } from 'vis-data/peer/esm/vis-data.js';

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

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

var check = function (it) {
  return it && it.Math == Math && it;
}; // https://github.com/zloirock/core-js/issues/86#issuecomment-115759028


var global$1 = // eslint-disable-next-line es/no-global-this -- safe
check(typeof globalThis == 'object' && globalThis) || check(typeof window == 'object' && window) || // eslint-disable-next-line no-restricted-globals -- safe
check(typeof self == 'object' && self) || check(typeof commonjsGlobal == 'object' && commonjsGlobal) || // eslint-disable-next-line no-new-func -- fallback
function () {
  return this;
}() || Function('return this')();

var fails = function (exec) {
  try {
    return !!exec();
  } catch (error) {
    return true;
  }
};

var descriptors = !fails(function () {
  // eslint-disable-next-line es/no-object-defineproperty -- required for testing
  return Object.defineProperty({}, 1, {
    get: function () {
      return 7;
    }
  })[1] != 7;
});

var $propertyIsEnumerable$1 = {}.propertyIsEnumerable; // eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe

var getOwnPropertyDescriptor$3 = Object.getOwnPropertyDescriptor; // Nashorn ~ JDK8 bug

var NASHORN_BUG = getOwnPropertyDescriptor$3 && !$propertyIsEnumerable$1.call({
  1: 2
}, 1); // `Object.prototype.propertyIsEnumerable` method implementation
// https://tc39.es/ecma262/#sec-object.prototype.propertyisenumerable

var f$6 = NASHORN_BUG ? function propertyIsEnumerable(V) {
  var descriptor = getOwnPropertyDescriptor$3(this, V);
  return !!descriptor && descriptor.enumerable;
} : $propertyIsEnumerable$1;
var objectPropertyIsEnumerable = {
  f: f$6
};

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

var toString$1 = {}.toString;

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

var split = ''.split; // fallback for non-array-like ES3 and non-enumerable old V8 strings

var indexedObject = fails(function () {
  // throws an error in rhino, see https://github.com/mozilla/rhino/issues/346
  // eslint-disable-next-line no-prototype-builtins -- safe
  return !Object('z').propertyIsEnumerable(0);
}) ? function (it) {
  return classofRaw(it) == 'String' ? split.call(it, '') : Object(it);
} : Object;

// `RequireObjectCoercible` abstract operation
// https://tc39.es/ecma262/#sec-requireobjectcoercible
var requireObjectCoercible = function (it) {
  if (it == undefined) throw TypeError("Can't call method on " + it);
  return it;
};

var toIndexedObject = function (it) {
  return indexedObject(requireObjectCoercible(it));
};

var isObject$1 = function (it) {
  return typeof it === 'object' ? it !== null : typeof it === 'function';
};

// https://tc39.es/ecma262/#sec-toprimitive
// instead of the ES6 spec version, we didn't implement @@toPrimitive case
// and the second argument - flag - preferred type is a string

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

// https://tc39.es/ecma262/#sec-toobject

var toObject = function (argument) {
  return Object(requireObjectCoercible(argument));
};

var hasOwnProperty = {}.hasOwnProperty;

var has$1 = Object.hasOwn || function hasOwn(it, key) {
  return hasOwnProperty.call(toObject(it), key);
};

var document$1 = global$1.document; // typeof document.createElement is 'object' in old IE

var EXISTS = isObject$1(document$1) && isObject$1(document$1.createElement);

var documentCreateElement = function (it) {
  return EXISTS ? document$1.createElement(it) : {};
};

var ie8DomDefine = !descriptors && !fails(function () {
  // eslint-disable-next-line es/no-object-defineproperty -- requied for testing
  return Object.defineProperty(documentCreateElement('div'), 'a', {
    get: function () {
      return 7;
    }
  }).a != 7;
});

var $getOwnPropertyDescriptor$1 = Object.getOwnPropertyDescriptor; // `Object.getOwnPropertyDescriptor` method
// https://tc39.es/ecma262/#sec-object.getownpropertydescriptor

var f$5 = descriptors ? $getOwnPropertyDescriptor$1 : function getOwnPropertyDescriptor(O, P) {
  O = toIndexedObject(O);
  P = toPrimitive(P, true);
  if (ie8DomDefine) try {
    return $getOwnPropertyDescriptor$1(O, P);
  } catch (error) {
    /* empty */
  }
  if (has$1(O, P)) return createPropertyDescriptor(!objectPropertyIsEnumerable.f.call(O, P), O[P]);
};
var objectGetOwnPropertyDescriptor = {
  f: f$5
};

var replacement = /#|\.prototype\./;

var isForced = function (feature, detection) {
  var value = data[normalize(feature)];
  return value == POLYFILL ? true : value == NATIVE ? false : typeof detection == 'function' ? fails(detection) : !!detection;
};

var normalize = isForced.normalize = function (string) {
  return String(string).replace(replacement, '.').toLowerCase();
};

var data = isForced.data = {};
var NATIVE = isForced.NATIVE = 'N';
var POLYFILL = isForced.POLYFILL = 'P';
var isForced_1 = isForced;

var path = {};

var aFunction$1 = function (it) {
  if (typeof it != 'function') {
    throw TypeError(String(it) + ' is not a function');
  }

  return it;
};

var functionBindContext = function (fn, that, length) {
  aFunction$1(fn);
  if (that === undefined) return fn;

  switch (length) {
    case 0:
      return function () {
        return fn.call(that);
      };

    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 ()
  /* ...args */
  {
    return fn.apply(that, arguments);
  };
};

var anObject = function (it) {
  if (!isObject$1(it)) {
    throw TypeError(String(it) + ' is not an object');
  }

  return it;
};

var $defineProperty$1 = Object.defineProperty; // `Object.defineProperty` method
// https://tc39.es/ecma262/#sec-object.defineproperty

var f$4 = descriptors ? $defineProperty$1 : function defineProperty(O, P, Attributes) {
  anObject(O);
  P = toPrimitive(P, true);
  anObject(Attributes);
  if (ie8DomDefine) try {
    return $defineProperty$1(O, P, Attributes);
  } catch (error) {
    /* empty */
  }
  if ('get' in Attributes || 'set' in Attributes) throw TypeError('Accessors not supported');
  if ('value' in Attributes) O[P] = Attributes.value;
  return O;
};
var objectDefineProperty = {
  f: f$4
};

var createNonEnumerableProperty = descriptors ? function (object, key, value) {
  return objectDefineProperty.f(object, key, createPropertyDescriptor(1, value));
} : function (object, key, value) {
  object[key] = value;
  return object;
};

var getOwnPropertyDescriptor$2 = objectGetOwnPropertyDescriptor.f;

var wrapConstructor = function (NativeConstructor) {
  var Wrapper = function (a, b, c) {
    if (this instanceof NativeConstructor) {
      switch (arguments.length) {
        case 0:
          return new NativeConstructor();

        case 1:
          return new NativeConstructor(a);

        case 2:
          return new NativeConstructor(a, b);
      }

      return new NativeConstructor(a, b, c);
    }

    return NativeConstructor.apply(this, arguments);
  };

  Wrapper.prototype = NativeConstructor.prototype;
  return Wrapper;
};
/*
  options.target      - name of the target object
  options.global      - target is the global object
  options.stat        - export as static methods of target
  options.proto       - export as prototype methods of target
  options.real        - real prototype method for the `pure` version
  options.forced      - export even if the native feature is available
  options.bind        - bind methods to the target, required for the `pure` version
  options.wrap        - wrap constructors to preventing global pollution, required for the `pure` version
  options.unsafe      - use the simple assignment of property instead of delete + defineProperty
  options.sham        - add a flag to not completely full polyfills
  options.enumerable  - export as enumerable property
  options.noTargetGet - prevent calling a getter on target
*/


var _export = function (options, source) {
  var TARGET = options.target;
  var GLOBAL = options.global;
  var STATIC = options.stat;
  var PROTO = options.proto;
  var nativeSource = GLOBAL ? global$1 : STATIC ? global$1[TARGET] : (global$1[TARGET] || {}).prototype;
  var target = GLOBAL ? path : path[TARGET] || (path[TARGET] = {});
  var targetPrototype = target.prototype;
  var FORCED, USE_NATIVE, VIRTUAL_PROTOTYPE;
  var key, sourceProperty, targetProperty, nativeProperty, resultProperty, descriptor;

  for (key in source) {
    FORCED = isForced_1(GLOBAL ? key : TARGET + (STATIC ? '.' : '#') + key, options.forced); // contains in native

    USE_NATIVE = !FORCED && nativeSource && has$1(nativeSource, key);
    targetProperty = target[key];
    if (USE_NATIVE) if (options.noTargetGet) {
      descriptor = getOwnPropertyDescriptor$2(nativeSource, key);
      nativeProperty = descriptor && descriptor.value;
    } else nativeProperty = nativeSource[key]; // export native or implementation

    sourceProperty = USE_NATIVE && nativeProperty ? nativeProperty : source[key];
    if (USE_NATIVE && typeof targetProperty === typeof sourceProperty) continue; // bind timers to global for call from export context

    if (options.bind && USE_NATIVE) resultProperty = functionBindContext(sourceProperty, global$1); // wrap global constructors for prevent changs in this version
    else if (options.wrap && USE_NATIVE) resultProperty = wrapConstructor(sourceProperty); // make static versions for prototype methods
      else if (PROTO && typeof sourceProperty == 'function') resultProperty = functionBindContext(Function.call, sourceProperty); // default case
        else resultProperty = sourceProperty; // add a flag to not completely full polyfills

    if (options.sham || sourceProperty && sourceProperty.sham || targetProperty && targetProperty.sham) {
      createNonEnumerableProperty(resultProperty, 'sham', true);
    }

    target[key] = resultProperty;

    if (PROTO) {
      VIRTUAL_PROTOTYPE = TARGET + 'Prototype';

      if (!has$1(path, VIRTUAL_PROTOTYPE)) {
        createNonEnumerableProperty(path, VIRTUAL_PROTOTYPE, {});
      } // export virtual prototype methods


      path[VIRTUAL_PROTOTYPE][key] = sourceProperty; // export real prototype methods

      if (options.real && targetPrototype && !targetPrototype[key]) {
        createNonEnumerableProperty(targetPrototype, key, sourceProperty);
      }
    }
  }
};

var aFunction = function (variable) {
  return typeof variable == 'function' ? variable : undefined;
};

var getBuiltIn = function (namespace, method) {
  return arguments.length < 2 ? aFunction(path[namespace]) || aFunction(global$1[namespace]) : path[namespace] && path[namespace][method] || global$1[namespace] && global$1[namespace][method];
};

var ceil = Math.ceil;
var floor$1 = Math.floor; // `ToInteger` abstract operation
// https://tc39.es/ecma262/#sec-tointeger

var toInteger = function (argument) {
  return isNaN(argument = +argument) ? 0 : (argument > 0 ? floor$1 : ceil)(argument);
};

var min$2 = Math.min; // `ToLength` abstract operation
// https://tc39.es/ecma262/#sec-tolength

var toLength = function (argument) {
  return argument > 0 ? min$2(toInteger(argument), 0x1FFFFFFFFFFFFF) : 0; // 2 ** 53 - 1 == 9007199254740991
};

var max$2 = Math.max;
var min$1 = Math.min; // Helper for a popular repeating case of the spec:
// Let integer be ? ToInteger(index).
// If integer < 0, let result be max((length + integer), 0); else let result be min(integer, length).

var toAbsoluteIndex = function (index, length) {
  var integer = toInteger(index);
  return integer < 0 ? max$2(integer + length, 0) : min$1(integer, length);
};

var createMethod$5 = function (IS_INCLUDES) {
  return function ($this, el, fromIndex) {
    var O = toIndexedObject($this);
    var length = toLength(O.length);
    var index = toAbsoluteIndex(fromIndex, length);
    var value; // Array#includes uses SameValueZero equality algorithm
    // eslint-disable-next-line no-self-compare -- NaN check

    if (IS_INCLUDES && el != el) while (length > index) {
      value = O[index++]; // eslint-disable-next-line no-self-compare -- NaN check

      if (value != value) return true; // Array#indexOf ignores holes, Array#includes - not
    } else for (; length > index; index++) {
      if ((IS_INCLUDES || index in O) && O[index] === el) return IS_INCLUDES || index || 0;
    }
    return !IS_INCLUDES && -1;
  };
};

var arrayIncludes = {
  // `Array.prototype.includes` method
  // https://tc39.es/ecma262/#sec-array.prototype.includes
  includes: createMethod$5(true),
  // `Array.prototype.indexOf` method
  // https://tc39.es/ecma262/#sec-array.prototype.indexof
  indexOf: createMethod$5(false)
};

var hiddenKeys$1 = {};

var indexOf$3 = arrayIncludes.indexOf;

var objectKeysInternal = function (object, names) {
  var O = toIndexedObject(object);
  var i = 0;
  var result = [];
  var key;

  for (key in O) !has$1(hiddenKeys$1, key) && has$1(O, key) && result.push(key); // Don't enum bug & hidden keys


  while (names.length > i) if (has$1(O, key = names[i++])) {
    ~indexOf$3(result, key) || result.push(key);
  }

  return result;
};

// IE8- don't enum bug keys
var enumBugKeys = ['constructor', 'hasOwnProperty', 'isPrototypeOf', 'propertyIsEnumerable', 'toLocaleString', 'toString', 'valueOf'];

// https://tc39.es/ecma262/#sec-object.keys
// eslint-disable-next-line es/no-object-keys -- safe

var objectKeys = Object.keys || function keys(O) {
  return objectKeysInternal(O, enumBugKeys);
};

// https://tc39.es/ecma262/#sec-object.defineproperties
// eslint-disable-next-line es/no-object-defineproperties -- safe

var objectDefineProperties = descriptors ? Object.defineProperties : function defineProperties(O, Properties) {
  anObject(O);
  var keys = objectKeys(Properties);
  var length = keys.length;
  var index = 0;
  var key;

  while (length > index) objectDefineProperty.f(O, key = keys[index++], Properties[key]);

  return O;
};

var html = getBuiltIn('document', 'documentElement');

var setGlobal = function (key, value) {
  try {
    createNonEnumerableProperty(global$1, key, value);
  } catch (error) {
    global$1[key] = value;
  }

  return value;
};

var SHARED = '__core-js_shared__';
var store$1 = global$1[SHARED] || setGlobal(SHARED, {});
var sharedStore = store$1;

var shared = createCommonjsModule(function (module) {
  (module.exports = function (key, value) {
    return sharedStore[key] || (sharedStore[key] = value !== undefined ? value : {});
  })('versions', []).push({
    version: '3.14.0',
    mode: 'pure' ,
    copyright: '© 2021 Denis Pushkarev (zloirock.ru)'
  });
});

var id = 0;
var postfix = Math.random();

var uid = function (key) {
  return 'Symbol(' + String(key === undefined ? '' : key) + ')_' + (++id + postfix).toString(36);
};

var keys$3 = shared('keys');

var sharedKey = function (key) {
  return keys$3[key] || (keys$3[key] = uid(key));
};

var GT = '>';
var LT = '<';
var PROTOTYPE$1 = 'prototype';
var SCRIPT = 'script';
var IE_PROTO$1 = sharedKey('IE_PROTO');

var EmptyConstructor = function () {
  /* empty */
};

var scriptTag = function (content) {
  return LT + SCRIPT + GT + content + LT + '/' + SCRIPT + GT;
}; // Create object with fake `null` prototype: use ActiveX Object with cleared prototype


var NullProtoObjectViaActiveX = function (activeXDocument) {
  activeXDocument.write(scriptTag(''));
  activeXDocument.close();
  var temp = activeXDocument.parentWindow.Object;
  activeXDocument = null; // avoid memory leak

  return temp;
}; // Create object with fake `null` prototype: use iframe Object with cleared prototype


var NullProtoObjectViaIFrame = function () {
  // Thrash, waste and sodomy: IE GC bug
  var iframe = documentCreateElement('iframe');
  var JS = 'java' + SCRIPT + ':';
  var iframeDocument;
  iframe.style.display = 'none';
  html.appendChild(iframe); // https://github.com/zloirock/core-js/issues/475

  iframe.src = String(JS);
  iframeDocument = iframe.contentWindow.document;
  iframeDocument.open();
  iframeDocument.write(scriptTag('document.F=Object'));
  iframeDocument.close();
  return iframeDocument.F;
}; // Check for document.domain and active x support
// No need to use active x approach when document.domain is not set
// see https://github.com/es-shims/es5-shim/issues/150
// variation of https://github.com/kitcambridge/es5-shim/commit/4f738ac066346
// avoid IE GC bug


var activeXDocument;

var NullProtoObject = function () {
  try {
    /* global ActiveXObject -- old IE */
    activeXDocument = document.domain && new ActiveXObject('htmlfile');
  } catch (error) {
    /* ignore */
  }

  NullProtoObject = activeXDocument ? NullProtoObjectViaActiveX(activeXDocument) : NullProtoObjectViaIFrame();
  var length = enumBugKeys.length;

  while (length--) delete NullProtoObject[PROTOTYPE$1][enumBugKeys[length]];

  return NullProtoObject();
};

hiddenKeys$1[IE_PROTO$1] = true; // `Object.create` method
// https://tc39.es/ecma262/#sec-object.create

var objectCreate = Object.create || function create(O, Properties) {
  var result;

  if (O !== null) {
    EmptyConstructor[PROTOTYPE$1] = anObject(O);
    result = new EmptyConstructor();
    EmptyConstructor[PROTOTYPE$1] = null; // add "__proto__" for Object.getPrototypeOf polyfill

    result[IE_PROTO$1] = O;
  } else result = NullProtoObject();

  return Properties === undefined ? result : objectDefineProperties(result, Properties);
};

var slice$6 = [].slice;
var factories = {};

var construct$3 = function (C, argsLength, args) {
  if (!(argsLength in factories)) {
    for (var list = [], i = 0; i < argsLength; i++) list[i] = 'a[' + i + ']'; // eslint-disable-next-line no-new-func -- we have no proper alternatives, IE8- only


    factories[argsLength] = Function('C,a', 'return new C(' + list.join(',') + ')');
  }

  return factories[argsLength](C, args);
}; // `Function.prototype.bind` method implementation
// https://tc39.es/ecma262/#sec-function.prototype.bind


var functionBind = Function.bind || function bind(that
/* , ...args */
) {
  var fn = aFunction$1(this);
  var partArgs = slice$6.call(arguments, 1);

  var boundFunction = function bound()
  /* args... */
  {
    var args = partArgs.concat(slice$6.call(arguments));
    return this instanceof boundFunction ? construct$3(fn, args.length, args) : fn.apply(that, args);
  };

  if (isObject$1(fn.prototype)) boundFunction.prototype = fn.prototype;
  return boundFunction;
};

var nativeConstruct = getBuiltIn('Reflect', 'construct'); // `Reflect.construct` method
// https://tc39.es/ecma262/#sec-reflect.construct
// MS Edge supports only 2 arguments and argumentsList argument is optional
// FF Nightly sets third argument as `new.target`, but does not create `this` from it

var NEW_TARGET_BUG = fails(function () {
  function F() {
    /* empty */
  }

  return !(nativeConstruct(function () {
    /* empty */
  }, [], F) instanceof F);
});
var ARGS_BUG = !fails(function () {
  nativeConstruct(function () {
    /* empty */
  });
});
var FORCED$6 = NEW_TARGET_BUG || ARGS_BUG;
_export({
  target: 'Reflect',
  stat: true,
  forced: FORCED$6,
  sham: FORCED$6
}, {
  construct: function construct(Target, args
  /* , newTarget */
  ) {
    aFunction$1(Target);
    anObject(args);
    var newTarget = arguments.length < 3 ? Target : aFunction$1(arguments[2]);
    if (ARGS_BUG && !NEW_TARGET_BUG) return nativeConstruct(Target, args, newTarget);

    if (Target == newTarget) {
      // w/o altered newTarget, optimization for 0-4 arguments
      switch (args.length) {
        case 0:
          return new Target();

        case 1:
          return new Target(args[0]);

        case 2:
          return new Target(args[0], args[1]);

        case 3:
          return new Target(args[0], args[1], args[2]);

        case 4:
          return new Target(args[0], args[1], args[2], args[3]);
      } // w/o altered newTarget, lot of arguments case


      var $args = [null];
      $args.push.apply($args, args);
      return new (functionBind.apply(Target, $args))();
    } // with altered newTarget, not support built-in constructors


    var proto = newTarget.prototype;
    var instance = objectCreate(isObject$1(proto) ? proto : Object.prototype);
    var result = Function.apply.call(Target, instance, args);
    return isObject$1(result) ? result : instance;
  }
});

var construct$2 = path.Reflect.construct;

var construct$1 = construct$2;

var construct = construct$1;

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

// https://tc39.es/ecma262/#sec-object.defineproperty

_export({
  target: 'Object',
  stat: true,
  forced: !descriptors,
  sham: !descriptors
}, {
  defineProperty: objectDefineProperty.f
});

var defineProperty_1 = createCommonjsModule(function (module) {
  var Object = path.Object;

  var defineProperty = module.exports = function defineProperty(it, key, desc) {
    return Object.defineProperty(it, key, desc);
  };

  if (Object.defineProperty.sham) defineProperty.sham = true;
});

var defineProperty$8 = defineProperty_1;

var defineProperty$7 = defineProperty$8;

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;

    defineProperty$7(target, descriptor.key, descriptor);
  }
}

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

function _assertThisInitialized$1(self) {
  if (self === void 0) {
    throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
  }

  return self;
}

// https://tc39.es/ecma262/#sec-object.create

_export({
  target: 'Object',
  stat: true,
  sham: !descriptors
}, {
  create: objectCreate
});

var Object$1 = path.Object;

var create$4 = function create(P, D) {
  return Object$1.create(P, D);
};

var create$3 = create$4;

var create$2 = create$3;

var aPossiblePrototype = function (it) {
  if (!isObject$1(it) && it !== null) {
    throw TypeError("Can't set " + String(it) + ' as a prototype');
  }

  return it;
};

/* eslint-disable no-proto -- safe */
// https://tc39.es/ecma262/#sec-object.setprototypeof
// Works with __proto__ only. Old v8 can't work with null proto objects.
// eslint-disable-next-line es/no-object-setprototypeof -- safe

var objectSetPrototypeOf = Object.setPrototypeOf || ('__proto__' in {} ? function () {
  var CORRECT_SETTER = false;
  var test = {};
  var setter;

  try {
    // eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe
    setter = Object.getOwnPropertyDescriptor(Object.prototype, '__proto__').set;
    setter.call(test, []);
    CORRECT_SETTER = test instanceof Array;
  } catch (error) {
    /* empty */
  }

  return function setPrototypeOf(O, proto) {
    anObject(O);
    aPossiblePrototype(proto);
    if (CORRECT_SETTER) setter.call(O, proto);else O.__proto__ = proto;
    return O;
  };
}() : undefined);

// https://tc39.es/ecma262/#sec-object.setprototypeof

_export({
  target: 'Object',
  stat: true
}, {
  setPrototypeOf: objectSetPrototypeOf
});

var setPrototypeOf$2 = path.Object.setPrototypeOf;

var setPrototypeOf$1 = setPrototypeOf$2;

var setPrototypeOf = setPrototypeOf$1;

function _setPrototypeOf(o, p) {
  _setPrototypeOf = setPrototypeOf || function _setPrototypeOf(o, p) {
    o.__proto__ = p;
    return o;
  };

  return _setPrototypeOf(o, p);
}

function _inherits(subClass, superClass) {
  if (typeof superClass !== "function" && superClass !== null) {
    throw new TypeError("Super expression must either be null or a function");
  }

  subClass.prototype = create$2(superClass && superClass.prototype, {
    constructor: {
      value: subClass,
      writable: true,
      configurable: true
    }
  });
  if (superClass) _setPrototypeOf(subClass, superClass);
}

// https://tc39.es/ecma262/#sec-isarray
// eslint-disable-next-line es/no-array-isarray -- safe

var isArray$5 = Array.isArray || function isArray(arg) {
  return classofRaw(arg) == 'Array';
};

var createProperty = function (object, key, value) {
  var propertyKey = toPrimitive(key);
  if (propertyKey in object) objectDefineProperty.f(object, propertyKey, createPropertyDescriptor(0, value));else object[propertyKey] = value;
};

var engineUserAgent = getBuiltIn('navigator', 'userAgent') || '';

var process = global$1.process;
var versions = process && process.versions;
var v8 = versions && versions.v8;
var match, version;

if (v8) {
  match = v8.split('.');
  version = match[0] < 4 ? 1 : match[0] + match[1];
} else if (engineUserAgent) {
  match = engineUserAgent.match(/Edge\/(\d+)/);

  if (!match || match[1] >= 74) {
    match = engineUserAgent.match(/Chrome\/(\d+)/);
    if (match) version = match[1];
  }
}

var engineV8Version = version && +version;

/* eslint-disable es/no-symbol -- required for testing */

var nativeSymbol = !!Object.getOwnPropertySymbols && !fails(function () {
  var symbol = Symbol(); // Chrome 38 Symbol has incorrect toString conversion
  // `get-own-property-symbols` polyfill symbols converted to object are not Symbol instances

  return !String(symbol) || !(Object(symbol) instanceof Symbol) || // Chrome 38-40 symbols are not inherited from DOM collections prototypes to instances
  !Symbol.sham && engineV8Version && engineV8Version < 41;
});

/* eslint-disable es/no-symbol -- required for testing */
var useSymbolAsUid = nativeSymbol && !Symbol.sham && typeof Symbol.iterator == 'symbol';

var WellKnownSymbolsStore$1 = shared('wks');
var Symbol$1 = global$1.Symbol;
var createWellKnownSymbol = useSymbolAsUid ? Symbol$1 : Symbol$1 && Symbol$1.withoutSetter || uid;

var wellKnownSymbol = function (name) {
  if (!has$1(WellKnownSymbolsStore$1, name) || !(nativeSymbol || typeof WellKnownSymbolsStore$1[name] == 'string')) {
    if (nativeSymbol && has$1(Symbol$1, name)) {
      WellKnownSymbolsStore$1[name] = Symbol$1[name];
    } else {
      WellKnownSymbolsStore$1[name] = createWellKnownSymbol('Symbol.' + name);
    }
  }

  return WellKnownSymbolsStore$1[name];
};

var SPECIES$3 = wellKnownSymbol('species'); // `ArraySpeciesCreate` abstract operation
// https://tc39.es/ecma262/#sec-arrayspeciescreate

var arraySpeciesCreate = function (originalArray, length) {
  var C;

  if (isArray$5(originalArray)) {
    C = originalArray.constructor; // cross-realm fallback

    if (typeof C == 'function' && (C === Array || isArray$5(C.prototype))) C = undefined;else if (isObject$1(C)) {
      C = C[SPECIES$3];
      if (C === null) C = undefined;
    }
  }

  return new (C === undefined ? Array : C)(length === 0 ? 0 : length);
};

var SPECIES$2 = wellKnownSymbol('species');

var arrayMethodHasSpeciesSupport = function (METHOD_NAME) {
  // We can't use this feature detection in V8 since it causes
  // deoptimization and serious performance degradation
  // https://github.com/zloirock/core-js/issues/677
  return engineV8Version >= 51 || !fails(function () {
    var array = [];
    var constructor = array.constructor = {};

    constructor[SPECIES$2] = function () {
      return {
        foo: 1
      };
    };

    return array[METHOD_NAME](Boolean).foo !== 1;
  });
};

var IS_CONCAT_SPREADABLE = wellKnownSymbol('isConcatSpreadable');
var MAX_SAFE_INTEGER$1 = 0x1FFFFFFFFFFFFF;
var MAXIMUM_ALLOWED_INDEX_EXCEEDED = 'Maximum allowed index exceeded'; // We can't use this feature detection in V8 since it causes
// deoptimization and serious performance degradation
// https://github.com/zloirock/core-js/issues/679

var IS_CONCAT_SPREADABLE_SUPPORT = engineV8Version >= 51 || !fails(function () {
  var array = [];
  array[IS_CONCAT_SPREADABLE] = false;
  return array.concat()[0] !== array;
});
var SPECIES_SUPPORT = arrayMethodHasSpeciesSupport('concat');

var isConcatSpreadable = function (O) {
  if (!isObject$1(O)) return false;
  var spreadable = O[IS_CONCAT_SPREADABLE];
  return spreadable !== undefined ? !!spreadable : isArray$5(O);
};

var FORCED$5 = !IS_CONCAT_SPREADABLE_SUPPORT || !SPECIES_SUPPORT; // `Array.prototype.concat` method
// https://tc39.es/ecma262/#sec-array.prototype.concat
// with adding support of @@isConcatSpreadable and @@species

_export({
  target: 'Array',
  proto: true,
  forced: FORCED$5
}, {
  // eslint-disable-next-line no-unused-vars -- required for `.length`
  concat: function concat(arg) {
    var O = toObject(this);
    var A = arraySpeciesCreate(O, 0);
    var n = 0;
    var i, k, length, len, E;

    for (i = -1, length = arguments.length; i < length; i++) {
      E = i === -1 ? O : arguments[i];

      if (isConcatSpreadable(E)) {
        len = toLength(E.length);
        if (n + len > MAX_SAFE_INTEGER$1) throw TypeError(MAXIMUM_ALLOWED_INDEX_EXCEEDED);

        for (k = 0; k < len; k++, n++) if (k in E) createProperty(A, n, E[k]);
      } else {
        if (n >= MAX_SAFE_INTEGER$1) throw TypeError(MAXIMUM_ALLOWED_INDEX_EXCEEDED);
        createProperty(A, n++, E);
      }
    }

    A.length = n;
    return A;
  }
});

var hiddenKeys = enumBugKeys.concat('length', 'prototype'); // `Object.getOwnPropertyNames` method
// https://tc39.es/ecma262/#sec-object.getownpropertynames
// eslint-disable-next-line es/no-object-getownpropertynames -- safe

var f$3 = Object.getOwnPropertyNames || function getOwnPropertyNames(O) {
  return objectKeysInternal(O, hiddenKeys);
};

var objectGetOwnPropertyNames = {
  f: f$3
};

/* eslint-disable es/no-object-getownpropertynames -- safe */
var $getOwnPropertyNames$1 = objectGetOwnPropertyNames.f;
var toString = {}.toString;
var windowNames = typeof window == 'object' && window && Object.getOwnPropertyNames ? Object.getOwnPropertyNames(window) : [];

var getWindowNames = function (it) {
  try {
    return $getOwnPropertyNames$1(it);
  } catch (error) {
    return windowNames.slice();
  }
}; // fallback for IE11 buggy Object.getOwnPropertyNames with iframe and window


var f$2 = function getOwnPropertyNames(it) {
  return windowNames && toString.call(it) == '[object Window]' ? getWindowNames(it) : $getOwnPropertyNames$1(toIndexedObject(it));
};

var objectGetOwnPropertyNamesExternal = {
  f: f$2
};

// eslint-disable-next-line es/no-object-getownpropertysymbols -- safe
var f$1 = Object.getOwnPropertySymbols;
var objectGetOwnPropertySymbols = {
  f: f$1
};

var redefine = function (target, key, value, options) {
  if (options && options.enumerable) target[key] = value;else createNonEnumerableProperty(target, key, value);
};

var f = wellKnownSymbol;
var wellKnownSymbolWrapped = {
  f: f
};

var defineProperty$6 = objectDefineProperty.f;

var defineWellKnownSymbol = function (NAME) {
  var Symbol = path.Symbol || (path.Symbol = {});
  if (!has$1(Symbol, NAME)) defineProperty$6(Symbol, NAME, {
    value: wellKnownSymbolWrapped.f(NAME)
  });
};

var TO_STRING_TAG$3 = wellKnownSymbol('toStringTag');
var test$2 = {};
test$2[TO_STRING_TAG$3] = 'z';
var toStringTagSupport = String(test$2) === '[object z]';

var TO_STRING_TAG$2 = wellKnownSymbol('toStringTag'); // ES3 wrong here

var CORRECT_ARGUMENTS = classofRaw(function () {
  return arguments;
}()) == 'Arguments'; // fallback for IE11 Script Access Denied error

var tryGet = function (it, key) {
  try {
    return it[key];
  } catch (error) {
    /* empty */
  }
}; // getting tag from ES6+ `Object.prototype.toString`


var classof = toStringTagSupport ? classofRaw : function (it) {
  var O, tag, result;
  return it === undefined ? 'Undefined' : it === null ? 'Null' // @@toStringTag case
  : typeof (tag = tryGet(O = Object(it), TO_STRING_TAG$2)) == 'string' ? tag // builtinTag case
  : CORRECT_ARGUMENTS ? classofRaw(O) // ES3 arguments fallback
  : (result = classofRaw(O)) == 'Object' && typeof O.callee == 'function' ? 'Arguments' : result;
};

// https://tc39.es/ecma262/#sec-object.prototype.tostring


var objectToString = toStringTagSupport ? {}.toString : function toString() {
  return '[object ' + classof(this) + ']';
};

var defineProperty$5 = objectDefineProperty.f;
var TO_STRING_TAG$1 = wellKnownSymbol('toStringTag');

var setToStringTag = function (it, TAG, STATIC, SET_METHOD) {
  if (it) {
    var target = STATIC ? it : it.prototype;

    if (!has$1(target, TO_STRING_TAG$1)) {
      defineProperty$5(target, TO_STRING_TAG$1, {
        configurable: true,
        value: TAG
      });
    }

    if (SET_METHOD && !toStringTagSupport) {
      createNonEnumerableProperty(target, 'toString', objectToString);
    }
  }
};

var functionToString = Function.toString; // this helper broken in `core-js@3.4.1-3.4.4`, so we can't use `shared` helper

if (typeof sharedStore.inspectSource != 'function') {
  sharedStore.inspectSource = function (it) {
    return functionToString.call(it);
  };
}

var inspectSource = sharedStore.inspectSource;

var WeakMap$1 = global$1.WeakMap;
var nativeWeakMap = typeof WeakMap$1 === 'function' && /native code/.test(inspectSource(WeakMap$1));

var OBJECT_ALREADY_INITIALIZED = 'Object already initialized';
var WeakMap = global$1.WeakMap;
var set$3, get, has;

var enforce = function (it) {
  return has(it) ? get(it) : set$3(it, {});
};

var getterFor = function (TYPE) {
  return function (it) {
    var state;

    if (!isObject$1(it) || (state = get(it)).type !== TYPE) {
      throw TypeError('Incompatible receiver, ' + TYPE + ' required');
    }

    return state;
  };
};

if (nativeWeakMap || sharedStore.state) {
  var store = sharedStore.state || (sharedStore.state = new WeakMap());
  var wmget = store.get;
  var wmhas = store.has;
  var wmset = store.set;

  set$3 = function (it, metadata) {
    if (wmhas.call(store, it)) throw new TypeError(OBJECT_ALREADY_INITIALIZED);
    metadata.facade = it;
    wmset.call(store, it, metadata);
    return metadata;
  };

  get = function (it) {
    return wmget.call(store, it) || {};
  };

  has = function (it) {
    return wmhas.call(store, it);
  };
} else {
  var STATE = sharedKey('state');
  hiddenKeys$1[STATE] = true;

  set$3 = function (it, metadata) {
    if (has$1(it, STATE)) throw new TypeError(OBJECT_ALREADY_INITIALIZED);
    metadata.facade = it;
    createNonEnumerableProperty(it, STATE, metadata);
    return metadata;
  };

  get = function (it) {
    return has$1(it, STATE) ? it[STATE] : {};
  };

  has = function (it) {
    return has$1(it, STATE);
  };
}

var internalState = {
  set: set$3,
  get: get,
  has: has,
  enforce: enforce,
  getterFor: getterFor
};

var push = [].push; // `Array.prototype.{ forEach, map, filter, some, every, find, findIndex, filterOut }` methods implementation

var createMethod$4 = function (TYPE) {
  var IS_MAP = TYPE == 1;
  var IS_FILTER = TYPE == 2;
  var IS_SOME = TYPE == 3;
  var IS_EVERY = TYPE == 4;
  var IS_FIND_INDEX = TYPE == 6;
  var IS_FILTER_OUT = TYPE == 7;
  var NO_HOLES = TYPE == 5 || IS_FIND_INDEX;
  return function ($this, callbackfn, that, specificCreate) {
    var O = toObject($this);
    var self = indexedObject(O);
    var boundFunction = functionBindContext(callbackfn, that, 3);
    var length = toLength(self.length);
    var index = 0;
    var create = specificCreate || arraySpeciesCreate;
    var target = IS_MAP ? create($this, length) : IS_FILTER || IS_FILTER_OUT ? create($this, 0) : undefined;
    var value, result;

    for (; length > index; index++) if (NO_HOLES || index in self) {
      value = self[index];
      result = boundFunction(value, index, O);

      if (TYPE) {
        if (IS_MAP) target[index] = result; // map
        else if (result) switch (TYPE) {
            case 3:
              return true;
            // some

            case 5:
              return value;
            // find

            case 6:
              return index;
            // findIndex

            case 2:
              push.call(target, value);
            // filter
          } else switch (TYPE) {
            case 4:
              return false;
            // every

            case 7:
              push.call(target, value);
            // filterOut
          }
      }
    }

    return IS_FIND_INDEX ? -1 : IS_SOME || IS_EVERY ? IS_EVERY : target;
  };
};

var arrayIteration = {
  // `Array.prototype.forEach` method
  // https://tc39.es/ecma262/#sec-array.prototype.foreach
  forEach: createMethod$4(0),
  // `Array.prototype.map` method
  // https://tc39.es/ecma262/#sec-array.prototype.map
  map: createMethod$4(1),
  // `Array.prototype.filter` method
  // https://tc39.es/ecma262/#sec-array.prototype.filter
  filter: createMethod$4(2),
  // `Array.prototype.some` method
  // https://tc39.es/ecma262/#sec-array.prototype.some
  some: createMethod$4(3),
  // `Array.prototype.every` method
  // https://tc39.es/ecma262/#sec-array.prototype.every
  every: createMethod$4(4),
  // `Array.prototype.find` method
  // https://tc39.es/ecma262/#sec-array.prototype.find
  find: createMethod$4(5),
  // `Array.prototype.findIndex` method
  // https://tc39.es/ecma262/#sec-array.prototype.findIndex
  findIndex: createMethod$4(6),
  // `Array.prototype.filterOut` method
  // https://github.com/tc39/proposal-array-filtering
  filterOut: createMethod$4(7)
};

var $forEach$1 = arrayIteration.forEach;
var HIDDEN = sharedKey('hidden');
var SYMBOL = 'Symbol';
var PROTOTYPE = 'prototype';
var TO_PRIMITIVE = wellKnownSymbol('toPrimitive');
var setInternalState$4 = internalState.set;
var getInternalState$2 = internalState.getterFor(SYMBOL);
var ObjectPrototype$1 = Object[PROTOTYPE];
var $Symbol = global$1.Symbol;
var $stringify$1 = getBuiltIn('JSON', 'stringify');
var nativeGetOwnPropertyDescriptor$1 = objectGetOwnPropertyDescriptor.f;
var nativeDefineProperty = objectDefineProperty.f;
var nativeGetOwnPropertyNames = objectGetOwnPropertyNamesExternal.f;
var nativePropertyIsEnumerable = objectPropertyIsEnumerable.f;
var AllSymbols = shared('symbols');
var ObjectPrototypeSymbols = shared('op-symbols');
var StringToSymbolRegistry = shared('string-to-symbol-registry');
var SymbolToStringRegistry = shared('symbol-to-string-registry');
var WellKnownSymbolsStore = shared('wks');
var QObject = global$1.QObject; // Don't use setters in Qt Script, https://github.com/zloirock/core-js/issues/173

var USE_SETTER = !QObject || !QObject[PROTOTYPE] || !QObject[PROTOTYPE].findChild; // fallback for old Android, https://code.google.com/p/v8/issues/detail?id=687

var setSymbolDescriptor = descriptors && fails(function () {
  return objectCreate(nativeDefineProperty({}, 'a', {
    get: function () {
      return nativeDefineProperty(this, 'a', {
        value: 7
      }).a;
    }
  })).a != 7;
}) ? function (O, P, Attributes) {
  var ObjectPrototypeDescriptor = nativeGetOwnPropertyDescriptor$1(ObjectPrototype$1, P);
  if (ObjectPrototypeDescriptor) delete ObjectPrototype$1[P];
  nativeDefineProperty(O, P, Attributes);

  if (ObjectPrototypeDescriptor && O !== ObjectPrototype$1) {
    nativeDefineProperty(ObjectPrototype$1, P, ObjectPrototypeDescriptor);
  }
} : nativeDefineProperty;

var wrap$1 = function (tag, description) {
  var symbol = AllSymbols[tag] = objectCreate($Symbol[PROTOTYPE]);
  setInternalState$4(symbol, {
    type: SYMBOL,
    tag: tag,
    description: description
  });
  if (!descriptors) symbol.description = description;
  return symbol;
};

var isSymbol = useSymbolAsUid ? function (it) {
  return typeof it == 'symbol';
} : function (it) {
  return Object(it) instanceof $Symbol;
};

var $defineProperty = function defineProperty(O, P, Attributes) {
  if (O === ObjectPrototype$1) $defineProperty(ObjectPrototypeSymbols, P, Attributes);
  anObject(O);
  var key = toPrimitive(P, true);
  anObject(Attributes);

  if (has$1(AllSymbols, key)) {
    if (!Attributes.enumerable) {
      if (!has$1(O, HIDDEN)) nativeDefineProperty(O, HIDDEN, createPropertyDescriptor(1, {}));
      O[HIDDEN][key] = true;
    } else {
      if (has$1(O, HIDDEN) && O[HIDDEN][key]) O[HIDDEN][key] = false;
      Attributes = objectCreate(Attributes, {
        enumerable: createPropertyDescriptor(0, false)
      });
    }

    return setSymbolDescriptor(O, key, Attributes);
  }

  return nativeDefineProperty(O, key, Attributes);
};

var $defineProperties = function defineProperties(O, Properties) {
  anObject(O);
  var properties = toIndexedObject(Properties);
  var keys = objectKeys(properties).concat($getOwnPropertySymbols(properties));
  $forEach$1(keys, function (key) {
    if (!descriptors || $propertyIsEnumerable.call(properties, key)) $defineProperty(O, key, properties[key]);
  });
  return O;
};

var $create = function create(O, Properties) {
  return Properties === undefined ? objectCreate(O) : $defineProperties(objectCreate(O), Properties);
};

var $propertyIsEnumerable = function propertyIsEnumerable(V) {
  var P = toPrimitive(V, true);
  var enumerable = nativePropertyIsEnumerable.call(this, P);
  if (this === ObjectPrototype$1 && has$1(AllSymbols, P) && !has$1(ObjectPrototypeSymbols, P)) return false;
  return enumerable || !has$1(this, P) || !has$1(AllSymbols, P) || has$1(this, HIDDEN) && this[HIDDEN][P] ? enumerable : true;
};

var $getOwnPropertyDescriptor = function getOwnPropertyDescriptor(O, P) {
  var it = toIndexedObject(O);
  var key = toPrimitive(P, true);
  if (it === ObjectPrototype$1 && has$1(AllSymbols, key) && !has$1(ObjectPrototypeSymbols, key)) return;
  var descriptor = nativeGetOwnPropertyDescriptor$1(it, key);

  if (descriptor && has$1(AllSymbols, key) && !(has$1(it, HIDDEN) && it[HIDDEN][key])) {
    descriptor.enumerable = true;
  }

  return descriptor;
};

var $getOwnPropertyNames = function getOwnPropertyNames(O) {
  var names = nativeGetOwnPropertyNames(toIndexedObject(O));
  var result = [];
  $forEach$1(names, function (key) {
    if (!has$1(AllSymbols, key) && !has$1(hiddenKeys$1, key)) result.push(key);
  });
  return result;
};

var $getOwnPropertySymbols = function getOwnPropertySymbols(O) {
  var IS_OBJECT_PROTOTYPE = O === ObjectPrototype$1;
  var names = nativeGetOwnPropertyNames(IS_OBJECT_PROTOTYPE ? ObjectPrototypeSymbols : toIndexedObject(O));
  var result = [];
  $forEach$1(names, function (key) {
    if (has$1(AllSymbols, key) && (!IS_OBJECT_PROTOTYPE || has$1(ObjectPrototype$1, key))) {
      result.push(AllSymbols[key]);
    }
  });
  return result;
}; // `Symbol` constructor
// https://tc39.es/ecma262/#sec-symbol-constructor


if (!nativeSymbol) {
  $Symbol = function Symbol() {
    if (this instanceof $Symbol) throw TypeError('Symbol is not a constructor');
    var description = !arguments.length || arguments[0] === undefined ? undefined : String(arguments[0]);
    var tag = uid(description);

    var setter = function (value) {
      if (this === ObjectPrototype$1) setter.call(ObjectPrototypeSymbols, value);
      if (has$1(this, HIDDEN) && has$1(this[HIDDEN], tag)) this[HIDDEN][tag] = false;
      setSymbolDescriptor(this, tag, createPropertyDescriptor(1, value));
    };

    if (descriptors && USE_SETTER) setSymbolDescriptor(ObjectPrototype$1, tag, {
      configurable: true,
      set: setter
    });
    return wrap$1(tag, description);
  };

  redefine($Symbol[PROTOTYPE], 'toString', function toString() {
    return getInternalState$2(this).tag;
  });
  redefine($Symbol, 'withoutSetter', function (description) {
    return wrap$1(uid(description), description);
  });
  objectPropertyIsEnumerable.f = $propertyIsEnumerable;
  objectDefineProperty.f = $defineProperty;
  objectGetOwnPropertyDescriptor.f = $getOwnPropertyDescriptor;
  objectGetOwnPropertyNames.f = objectGetOwnPropertyNamesExternal.f = $getOwnPropertyNames;
  objectGetOwnPropertySymbols.f = $getOwnPropertySymbols;

  wellKnownSymbolWrapped.f = function (name) {
    return wrap$1(wellKnownSymbol(name), name);
  };

  if (descriptors) {
    // https://github.com/tc39/proposal-Symbol-description
    nativeDefineProperty($Symbol[PROTOTYPE], 'description', {
      configurable: true,
      get: function description() {
        return getInternalState$2(this).description;
      }
    });
  }
}

_export({
  global: true,
  wrap: true,
  forced: !nativeSymbol,
  sham: !nativeSymbol
}, {
  Symbol: $Symbol
});
$forEach$1(objectKeys(WellKnownSymbolsStore), function (name) {
  defineWellKnownSymbol(name);
});
_export({
  target: SYMBOL,
  stat: true,
  forced: !nativeSymbol
}, {
  // `Symbol.for` method
  // https://tc39.es/ecma262/#sec-symbol.for
  'for': function (key) {
    var string = String(key);
    if (has$1(StringToSymbolRegistry, string)) return StringToSymbolRegistry[string];
    var symbol = $Symbol(string);
    StringToSymbolRegistry[string] = symbol;
    SymbolToStringRegistry[symbol] = string;
    return symbol;
  },
  // `Symbol.keyFor` method
  // https://tc39.es/ecma262/#sec-symbol.keyfor
  keyFor: function keyFor(sym) {
    if (!isSymbol(sym)) throw TypeError(sym + ' is not a symbol');
    if (has$1(SymbolToStringRegistry, sym)) return SymbolToStringRegistry[sym];
  },
  useSetter: function () {
    USE_SETTER = true;
  },
  useSimple: function () {
    USE_SETTER = false;
  }
});
_export({
  target: 'Object',
  stat: true,
  forced: !nativeSymbol,
  sham: !descriptors
}, {
  // `Object.create` method
  // https://tc39.es/ecma262/#sec-object.create
  create: $create,
  // `Object.defineProperty` method
  // https://tc39.es/ecma262/#sec-object.defineproperty
  defineProperty: $defineProperty,
  // `Object.defineProperties` method
  // https://tc39.es/ecma262/#sec-object.defineproperties
  defineProperties: $defineProperties,
  // `Object.getOwnPropertyDescriptor` method
  // https://tc39.es/ecma262/#sec-object.getownpropertydescriptors
  getOwnPropertyDescriptor: $getOwnPropertyDescriptor
});
_export({
  target: 'Object',
  stat: true,
  forced: !nativeSymbol
}, {
  // `Object.getOwnPropertyNames` method
  // https://tc39.es/ecma262/#sec-object.getownpropertynames
  getOwnPropertyNames: $getOwnPropertyNames,
  // `Object.getOwnPropertySymbols` method
  // https://tc39.es/ecma262/#sec-object.getownpropertysymbols
  getOwnPropertySymbols: $getOwnPropertySymbols
}); // Chrome 38 and 39 `Object.getOwnPropertySymbols` fails on primitives
// https://bugs.chromium.org/p/v8/issues/detail?id=3443

_export({
  target: 'Object',
  stat: true,
  forced: fails(function () {
    objectGetOwnPropertySymbols.f(1);
  })
}, {
  getOwnPropertySymbols: function getOwnPropertySymbols(it) {
    return objectGetOwnPropertySymbols.f(toObject(it));
  }
}); // `JSON.stringify` method behavior with symbols
// https://tc39.es/ecma262/#sec-json.stringify

if ($stringify$1) {
  var FORCED_JSON_STRINGIFY = !nativeSymbol || fails(function () {
    var symbol = $Symbol(); // MS Edge converts symbol values to JSON as {}

    return $stringify$1([symbol]) != '[null]' // WebKit converts symbol values to JSON as null
    || $stringify$1({
      a: symbol
    }) != '{}' // V8 throws on boxed symbols
    || $stringify$1(Object(symbol)) != '{}';
  });
  _export({
    target: 'JSON',
    stat: true,
    forced: FORCED_JSON_STRINGIFY
  }, {
    // eslint-disable-next-line no-unused-vars -- required for `.length`
    stringify: function stringify(it, replacer, space) {
      var args = [it];
      var index = 1;
      var $replacer;

      while (arguments.length > index) args.push(arguments[index++]);

      $replacer = replacer;
      if (!isObject$1(replacer) && it === undefined || isSymbol(it)) return; // IE8 returns string on undefined

      if (!isArray$5(replacer)) replacer = function (key, value) {
        if (typeof $replacer == 'function') value = $replacer.call(this, key, value);
        if (!isSymbol(value)) return value;
      };
      args[1] = replacer;
      return $stringify$1.apply(null, args);
    }
  });
} // `Symbol.prototype[@@toPrimitive]` method
// https://tc39.es/ecma262/#sec-symbol.prototype-@@toprimitive


if (!$Symbol[PROTOTYPE][TO_PRIMITIVE]) {
  createNonEnumerableProperty($Symbol[PROTOTYPE], TO_PRIMITIVE, $Symbol[PROTOTYPE].valueOf);
} // `Symbol.prototype[@@toStringTag]` property
// https://tc39.es/ecma262/#sec-symbol.prototype-@@tostringtag


setToStringTag($Symbol, SYMBOL);
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