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node_modules/core-js/internals/internal-state.js

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+'use strict';
+var NATIVE_WEAK_MAP = require('../internals/weak-map-basic-detection');
+var global = require('../internals/global');
+var isObject = require('../internals/is-object');
+var createNonEnumerableProperty = require('../internals/create-non-enumerable-property');
+var hasOwn = require('../internals/has-own-property');
+var shared = require('../internals/shared-store');
+var sharedKey = require('../internals/shared-key');
+var hiddenKeys = require('../internals/hidden-keys');
+
+var OBJECT_ALREADY_INITIALIZED = 'Object already initialized';
+var TypeError = global.TypeError;
+var WeakMap = global.WeakMap;
+var set, get, has;
+
+var enforce = function (it) {
+  return has(it) ? get(it) : set(it, {});
+};
+
+var getterFor = function (TYPE) {
+  return function (it) {
+    var state;
+    if (!isObject(it) || (state = get(it)).type !== TYPE) {
+      throw TypeError('Incompatible receiver, ' + TYPE + ' required');
+    } return state;
+  };
+};
+
+if (NATIVE_WEAK_MAP || shared.state) {
+  var store = shared.state || (shared.state = new WeakMap());
+  /* eslint-disable no-self-assign -- prototype methods protection */
+  store.get = store.get;
+  store.has = store.has;
+  store.set = store.set;
+  /* eslint-enable no-self-assign -- prototype methods protection */
+  set = function (it, metadata) {
+    if (store.has(it)) throw TypeError(OBJECT_ALREADY_INITIALIZED);
+    metadata.facade = it;
+    store.set(it, metadata);
+    return metadata;
+  };
+  get = function (it) {
+    return store.get(it) || {};
+  };
+  has = function (it) {
+    return store.has(it);
+  };
+} else {
+  var STATE = sharedKey('state');
+  hiddenKeys[STATE] = true;
+  set = function (it, metadata) {
+    if (hasOwn(it, STATE)) throw TypeError(OBJECT_ALREADY_INITIALIZED);
+    metadata.facade = it;
+    createNonEnumerableProperty(it, STATE, metadata);
+    return metadata;
+  };
+  get = function (it) {
+    return hasOwn(it, STATE) ? it[STATE] : {};
+  };
+  has = function (it) {
+    return hasOwn(it, STATE);
+  };
+}
+
+module.exports = {
+  set: set,
+  get: get,
+  has: has,
+  enforce: enforce,
+  getterFor: getterFor
+};