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.
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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
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. let target = {} let proto = Object.create(target) Reflect.setPrototypeOf(target, proto) // false
Specifications
Specification |
---|
ECMAScript (ECMA-262) The definition of 'Reflect.setPrototypeOf' in that specification. |
Browser compatibility
Desktop | Mobile | Server | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
setPrototypeOf | Chrome Full support 49 | Edge Full support 12 | Firefox Full support 42 | IE No support No | Opera Full support 36 | Safari Full support 10 | WebView Android Full support 49 | Chrome Android Full support 49 | Firefox Android Full support 42 | Opera Android Full support 36 | Safari iOS Full support 10 | Samsung Internet Android Full support 5.0 | nodejs Full support 6.0.0 |
Legend
- Full support
- Full support
- No support
- No support