The static Reflect.getPrototypeOf() method is almost the same method as Object.getPrototypeOf(). It returns the prototype (i.e. the value of the internal [[Prototype]] property) of the specified object.




The target object of which to get the prototype.

Return value

The prototype of the given object. If there are no inherited properties, null is returned.


A TypeError, if target is not an Object.


The Reflect.getPrototypeOf method returns the prototype (i.e. the value of the internal [[Prototype]] property) of the specified object.


Using Reflect.getPrototypeOf()

Reflect.getPrototypeOf({}); // Object.prototype
Reflect.getPrototypeOf(Object.prototype); // null
Reflect.getPrototypeOf(Object.create(null)); // null

Compared to Object.getPrototypeOf()

// Same result for Objects
Object.getPrototypeOf({});  // Object.prototype
Reflect.getPrototypeOf({}); // Object.prototype

// Both throw in ES5 for non-Objects
Object.getPrototypeOf('foo');  // Throws TypeError
Reflect.getPrototypeOf('foo'); // Throws TypeError

// In ES2015 only Reflect throws, Object coerces non-Objects
Object.getPrototypeOf('foo');  // String.prototype
Reflect.getPrototypeOf('foo'); // Throws TypeError

// To mimic the Object ES2015 behavior you need to coerce
Reflect.getPrototypeOf(Object('foo')); // String.prototype


Specification Status Comment
ECMAScript 2015 (6th Edition, ECMA-262)
The definition of 'Reflect.getPrototypeOf' in that specification.
Standard Initial definition.
ECMAScript Latest Draft (ECMA-262)
The definition of 'Reflect.getPrototypeOf' in that specification.

Browser compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung InternetNode.js
getPrototypeOfChrome Full support 49Edge Full support 12Firefox Full support 42IE No support NoOpera Full support 36Safari Full support 10WebView Android Full support 49Chrome Android Full support 49Firefox Android Full support 42Opera Android Full support 36Safari iOS Full support 10Samsung Internet Android Full support 5.0nodejs Full support 6.0.0


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See also