Getting the object properties

Getting the property names of an object: getOwnPropertyNames()

The getOwnPropertyNames() method is a built-in JavaScript function that returns an array of all non-inherited, enumerable properties of an object. These properties are the object’s own properties, which have been defined directly on the object, and are not inherited from its prototype chain.

The getOwnPropertyNames() method is useful when you need to obtain a list of an object’s own properties for various purposes, such as serialization, copying, or enumeration.

Example

Here’s an example demonstrating the use of getOwnPropertyNames() to retrieve all the own property names:

const person = {
  firstName: 'Sarah',
  lastName: 'Connor',
  age: 25,
}

// Addition of an own property
person.country = 'USA'

// Retrieving own property names
const ownPropertyNames = Object.getOwnPropertyNames(person)

console.log(ownPropertyNames)