--- /dev/null
+var toIndexedObject = require('../internals/to-indexed-object');
+var nativeGetOwnPropertyNames = require('../internals/object-get-own-property-names').f;
+
+var toString = {}.toString;
+
+var windowNames = typeof window == 'object' && window && Object.getOwnPropertyNames
+ ? Object.getOwnPropertyNames(window) : [];
+
+var getWindowNames = function (it) {
+ try {
+ return nativeGetOwnPropertyNames(it);
+ } catch (error) {
+ return windowNames.slice();
+ }
+};
+
+// fallback for IE11 buggy Object.getOwnPropertyNames with iframe and window
+module.exports.f = function getOwnPropertyNames(it) {
+ return windowNames && toString.call(it) == '[object Window]'
+ ? getWindowNames(it)
+ : nativeGetOwnPropertyNames(toIndexedObject(it));
+};