The static Reflect.setPrototypeOf() method is the same method as Object.setPrototypeOf(), except for its return type. It sets the prototype (i.e., the internal [[Prototype]] property) of a specified object to another object or to null, and returns true if the operation was successful, or false otherwise.
Reflect.setPrototypeOf()
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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
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. let target = {} let proto = Object.create(target) Reflect.setPrototypeOf(target, proto) // false
Specifications
Browser compatibility
| Desktop | Mobile | Server | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | Deno | Node.js | |
setPrototypeOf |
49
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12
|
42
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No
|
36
|
10
|
49
|
49
|
42
|
36
|
10
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5.0
|
1.0
|
6.0.0
|
See also
© 2005–2022 MDN 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
