The static Reflect.set()
method works like setting a property on an object.
Reflect.set()
Try it
Syntax
Reflect.set(target, propertyKey, value) Reflect.set(target, propertyKey, value, receiver)
Parameters
-
target
-
The target object on which to set the property.
-
propertyKey
-
The name of the property to set.
-
value
-
The value to set.
-
receiver
Optional -
The value of
this
provided for the call totarget
if a setter is encountered.
Return value
A Boolean
indicating whether or not setting the property was successful.
Exceptions
Description
The Reflect.set
method allows you to set a property on an object. It does property assignment and is like the property accessor syntax as a function.
Examples
Using Reflect.set()
// Object let obj = {} Reflect.set(obj, 'prop', 'value') // true obj.prop // "value" // Array let arr = ['duck', 'duck', 'duck'] Reflect.set(arr, 2, 'goose') // true arr[2] // "goose" // It can truncate an array. Reflect.set(arr, 'length', 1) // true arr // ["duck"] // With just one argument, propertyKey and value are "undefined". let obj = {} Reflect.set(obj) // true Reflect.getOwnPropertyDescriptor(obj, 'undefined') // { value: undefined, writable: true, enumerable: true, configurable: true }
Specifications
Specification |
---|
ECMAScript Language Specification # sec-reflect.set |
Browser compatibility
Desktop | Mobile | Server | ||||||||||||
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Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | Deno | Node.js | |
set |
49
|
12
|
42
|
No
|
36
|
10
|
49
|
49
|
42
|
36
|
10
|
5.0
|
1.0
|
6.0.0
|
See also
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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/set