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The static Reflect.ownKeys() method returns an array of the target object's own property keys.
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"]
var sym = Symbol.for("comet");
var sym2 = Symbol.for("meteor");
var 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 | Status | Comment |
|---|---|---|
| ECMAScript 2015 (6th Edition, ECMA-262) The definition of 'Reflect.ownKeys' in that specification. |
Standard | Initial definition. |
| ECMAScript 2017 Draft (ECMA-262) The definition of 'Reflect.ownKeys' in that specification. |
Draft |
Browser compatibility
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|
| Basic support | 49 | 42 (42) | No support | No support | No support |
| Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|
| Basic support | No support | No support | 42.0 (42) | No support | No support | No support |