javascript - How to test for object literal in IE8 -

currently using:

function isobjliteral(_obj) {   var _test  = _obj;   return (  typeof _obj !== 'object' || _obj === null ?      false :  (         (function () {            while (!false) {               if (  object.getprototypeof( _test = object.getprototypeof(_test)  ) === null) {                  break;               }            }            return object.getprototypeof(_obj) === _test;         })()      )   ); 

}

to test if we're using object literal. problem ie8< cannot use getprototypeof, know easy workaround?

improving this workaround:

if (typeof object.getprototypeof !== "function")     object.getprototypeof = "".__proto__ === string.prototype       ? function (obj) {             if (obj !== object(obj)) throw new typeerror("object please!");             return obj.__proto__;         }       : function (obj) {             if (obj !== object(obj)) throw new typeerror("object please!");             // may break if constructor has been tampered             var proto = obj.constructor && obj.constructor.prototype;             if (proto === obj) { // happens on prototype objects example                 var cons = obj.constructor;                 delete obj.constructor;                 proto = obj.constructor && obj.constructor.prototype;                 obj.constructor = cons;             }             // if (proto === obj) return null; // else went wrong             return proto;         }; 

haven't tested it, should work in ie8 cases. btw, seems isobjliteral can simplified to

function isplainobject(obj) {     if (obj !== object(obj)) return false;     var proto = object.getprototypeof(obj);     return !!proto && !object.getprototypeof(proto); }