--- /dev/null
+var anObject = require('../internals/an-object');
+var defineProperties = require('../internals/object-define-properties');
+var enumBugKeys = require('../internals/enum-bug-keys');
+var hiddenKeys = require('../internals/hidden-keys');
+var html = require('../internals/html');
+var documentCreateElement = require('../internals/document-create-element');
+var sharedKey = require('../internals/shared-key');
+
+var GT = '>';
+var LT = '<';
+var PROTOTYPE = 'prototype';
+var SCRIPT = 'script';
+var IE_PROTO = 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][enumBugKeys[length]];
+ return NullProtoObject();
+};
+
+hiddenKeys[IE_PROTO] = true;
+
+// `Object.create` method
+// https://tc39.es/ecma262/#sec-object.create
+module.exports = Object.create || function create(O, Properties) {
+ var result;
+ if (O !== null) {
+ EmptyConstructor[PROTOTYPE] = anObject(O);
+ result = new EmptyConstructor();
+ EmptyConstructor[PROTOTYPE] = null;
+ // add "__proto__" for Object.getPrototypeOf polyfill
+ result[IE_PROTO] = O;
+ } else result = NullProtoObject();
+ return Properties === undefined ? result : defineProperties(result, Properties);
+};