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Reflect.setPrototypeOf

The static Reflect.setPrototypeOf() method is the same method as Object.setPrototypeOf(). It sets the prototype (i.e., the internal [[Prototype]] property) of a specified object to another object or to null.

Syntax

Reflect.setPrototypeOf(target, prototype)

Parameters

target
The target object of which to set the prototype.
prototype
The object's new prototype (an object or null).

Return value

A Boolean indicating whether or not the prototype was successfully set.

Exceptions

A TypeError, if target is not an Object or if prototype is neither an object nor null.

Description

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

Examples

Using Reflect.setPrototypeOf()

Reflect.setPrototypeOf({}, Object.prototype); // true

// It can change an object's [[Prototype]] to null.
Reflect.setPrototypeOf({}, null); // true

// Returns false if target is not extensible.
Reflect.setPrototypeOf(Object.freeze({}), null); // false

// Returns false if it cause a prototype chain cycle.
var target = {};
var proto = Object.create(target);
Reflect.setPrototypeOf(target, proto); // false

Specifications

Browser compatibility

Feature Chrome Edge Firefox Internet Explorer Opera Safari
Basic support 49 12 42 No 36 10
Feature Android webview Chrome for Android Edge mobile Firefox for Android Opera Android iOS Safari Samsung Internet
Basic support 49 49 Yes 42 36 10 ?

See also

© 2005–2018 Mozilla Developer Network and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Reflect/setPrototypeOf