The static Reflect
.set()
method works like setting a property on an object.
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Syntax
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
A TypeError
, if target
is not an Object
.
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 (ECMA-262) The definition of 'Reflect.set' in that specification. |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Desktop | Mobile | Server | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
set | 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