`Object.getOwnPropertyNames()`

Returns an array of all own string-keyed property names, including non-enumerable ones.

Syntax

Object.getOwnPropertyNames(obj)

Name	Type	Required	Description
`obj`	`object`	Yes	The object whose own property names are returned.

Array — An array of all own string property names (enumerable or not).

const o = {};
Object.defineProperty(o, 'hidden', { value: 1, enumerable: false });
console.log(Object.getOwnPropertyNames(o));

Output

[ 'hidden' ]

console.log(Object.getOwnPropertyNames([1, 2]));

Output

[ '0', '1', 'length' ]

Unlike `Object.keys`, this includes non-enumerable properties. Symbol keys are excluded - use `Object.getOwnPropertySymbols` for those.