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rOACCT/node_modules/core-js/modules/es.weak-map.constructor.js
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es.weak-map.constructor.js
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			'use strict';
			var FREEZING = require('../internals/freezing');
			var global = require('../internals/global');
			var uncurryThis = require('../internals/function-uncurry-this');
			var defineBuiltIns = require('../internals/define-built-ins');
			var InternalMetadataModule = require('../internals/internal-metadata');
			var collection = require('../internals/collection');
			var collectionWeak = require('../internals/collection-weak');
			var isObject = require('../internals/is-object');
			var enforceInternalState = require('../internals/internal-state').enforce;
			var fails = require('../internals/fails');
			var NATIVE_WEAK_MAP = require('../internals/weak-map-basic-detection');

			var $Object = Object;
			// eslint-disable-next-line es/no-array-isarray -- safe
			var isArray = Array.isArray;
			// eslint-disable-next-line es/no-object-isextensible -- safe
			var isExtensible = $Object.isExtensible;
			// eslint-disable-next-line es/no-object-isfrozen -- safe
			var isFrozen = $Object.isFrozen;
			// eslint-disable-next-line es/no-object-issealed -- safe
			var isSealed = $Object.isSealed;
			// eslint-disable-next-line es/no-object-freeze -- safe
			var freeze = $Object.freeze;
			// eslint-disable-next-line es/no-object-seal -- safe
			var seal = $Object.seal;

			var FROZEN = {};
			var SEALED = {};
			var IS_IE11 = !global.ActiveXObject && 'ActiveXObject' in global;
			var InternalWeakMap;

			var wrapper = function (init) {
			return function WeakMap() {
			return init(this, arguments.length ? arguments[0] : undefined);
			};
			};

			// `WeakMap` constructor
			// https://tc39.es/ecma262/#sec-weakmap-constructor
			var $WeakMap = collection('WeakMap', wrapper, collectionWeak);
			var WeakMapPrototype = $WeakMap.prototype;
			var nativeSet = uncurryThis(WeakMapPrototype.set);

			// Chakra Edge bug: adding frozen arrays to WeakMap unfreeze them
			var hasMSEdgeFreezingBug = function () {
			return FREEZING && fails(function () {
			var frozenArray = freeze([]);
			nativeSet(new $WeakMap(), frozenArray, 1);
			return !isFrozen(frozenArray);
			});
			};

			// IE11 WeakMap frozen keys fix
			// We can't use feature detection because it crash some old IE builds
			// https://github.com/zloirock/core-js/issues/485
			if (NATIVE_WEAK_MAP) if (IS_IE11) {
			InternalWeakMap = collectionWeak.getConstructor(wrapper, 'WeakMap', true);
			InternalMetadataModule.enable();
			var nativeDelete = uncurryThis(WeakMapPrototype['delete']);
			var nativeHas = uncurryThis(WeakMapPrototype.has);
			var nativeGet = uncurryThis(WeakMapPrototype.get);
			defineBuiltIns(WeakMapPrototype, {
			'delete': function (key) {
			if (isObject(key) && !isExtensible(key)) {
			var state = enforceInternalState(this);
			if (!state.frozen) state.frozen = new InternalWeakMap();
			return nativeDelete(this, key) \|\| state.frozen['delete'](key);
			} return nativeDelete(this, key);
			},
			has: function has(key) {
			if (isObject(key) && !isExtensible(key)) {
			var state = enforceInternalState(this);
			if (!state.frozen) state.frozen = new InternalWeakMap();
			return nativeHas(this, key) \|\| state.frozen.has(key);
			} return nativeHas(this, key);
			},
			get: function get(key) {
			if (isObject(key) && !isExtensible(key)) {
			var state = enforceInternalState(this);
			if (!state.frozen) state.frozen = new InternalWeakMap();
			return nativeHas(this, key) ? nativeGet(this, key) : state.frozen.get(key);
			} return nativeGet(this, key);
			},
			set: function set(key, value) {
			if (isObject(key) && !isExtensible(key)) {
			var state = enforceInternalState(this);
			if (!state.frozen) state.frozen = new InternalWeakMap();
			nativeHas(this, key) ? nativeSet(this, key, value) : state.frozen.set(key, value);
			} else nativeSet(this, key, value);
			return this;
			}
			});
			// Chakra Edge frozen keys fix
			} else if (hasMSEdgeFreezingBug()) {
			defineBuiltIns(WeakMapPrototype, {
			set: function set(key, value) {
			var arrayIntegrityLevel;
			if (isArray(key)) {
			if (isFrozen(key)) arrayIntegrityLevel = FROZEN;
			else if (isSealed(key)) arrayIntegrityLevel = SEALED;
			}
			nativeSet(this, key, value);
			if (arrayIntegrityLevel == FROZEN) freeze(key);
			if (arrayIntegrityLevel == SEALED) seal(key);
			return this;
			}
			});
			}