履歴: Object.preventExtensions() 改訂履歴: English (US) 日本語 2015/04/13 15:52:59 teoli + sidebar 前へ 2015/04/13 15:53:36 teoli + sidebarJavaScript/Reference/Global_Objects/Object/preventExtensions Web/JavaScript/Reference/Global_Objects/Object/preventExtensions 2012/07/28 22:33:14 yyss