The static Reflect.ownKeys()
method returns an array of the target
object's own property keys.
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Syntax
Reflect.ownKeys(target)
Parameters
target
- The target object from which to get the own keys.
Return value
An Array
of the target
object's own property keys.
Exceptions
A TypeError
, if target
is not an Object
.
Description
The Reflect.ownKeys
method returns an array of the target
object's own property keys. Its return value is equivalent to Object.getOwnPropertyNames(target).concat(Object.getOwnPropertySymbols(target))
.
Examples
Using Reflect.ownKeys()
Reflect.ownKeys({z: 3, y: 2, x: 1}) // [ "z", "y", "x" ] Reflect.ownKeys([]) // ["length"] let sym = Symbol.for('comet') let sym2 = Symbol.for('meteor') let obj = {[sym]: 0, 'str': 0, '773': 0, '0': 0, [sym2]: 0, '-1': 0, '8': 0, 'second str': 0} Reflect.ownKeys(obj) // [ "0", "8", "773", "str", "-1", "second str", Symbol(comet), Symbol(meteor) ] // Indexes in numeric order, // strings in insertion order, // symbols in insertion order
Specifications
Specification |
---|
ECMAScript (ECMA-262) The definition of 'Reflect.ownKeys' 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 | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
ownKeys | 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