Reflect.ownKeys()

The static Reflect.ownKeys() method returns an array of the target object's own property keys.

Reflect.ownKeys(target)

target

The target object from which to get the own keys.

An Array of the target object's own property keys.

A TypeError, if target is not an Object.

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)).

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

• Reflect
• Object.getOwnPropertyNames()