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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.

Syntax

Reflect.getPrototypeOf(target)

Parameters

target
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.

Exceptions

A TypeError, if target is not an Object.

Description

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

Examples

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

Specifications

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.
Draft  

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support491242 No3610
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support4949 Yes4236105.0

See also

Etiquetas do documento e colaboradores

Colaboradores desta página: ZeikJT, wbamberg, fscholz, jameshkramer, kdex, bsara, eduardoboucas, gingerik
Última atualização por: ZeikJT,