--- /dev/null
+var has = require('../internals/has');
+var toObject = require('../internals/to-object');
+var sharedKey = require('../internals/shared-key');
+var CORRECT_PROTOTYPE_GETTER = require('../internals/correct-prototype-getter');
+
+var IE_PROTO = sharedKey('IE_PROTO');
+var ObjectPrototype = Object.prototype;
+
+// `Object.getPrototypeOf` method
+// https://tc39.es/ecma262/#sec-object.getprototypeof
+module.exports = CORRECT_PROTOTYPE_GETTER ? Object.getPrototypeOf : function (O) {
+ O = toObject(O);
+ if (has(O, IE_PROTO)) return O[IE_PROTO];
+ if (typeof O.constructor == 'function' && O instanceof O.constructor) {
+ return O.constructor.prototype;
+ } return O instanceof Object ? ObjectPrototype : null;
+};