Skip to content

The Object defineProperty() method

Find out all about the JavaScript defineProperty() method of the Object object

Creates or configures one object property.

Returns the object.

Takes 3 arguments. The first is an object upon which we’re going to create or configure the properties. The second is the property name defined as a string. The third is an object with the property definition.

Example:

const dog = {}
Object.defineProperty(dog, 'breed', {
  value: 'Siberian Husky'
})
console.log(dog.breed) //'Siberian Husky'

I didn’t just say breed: 'Siberian Husky' but I had to pass a property descriptor object, defined at the beginning of this page.


→ Here's my latest YouTube video

→ Get my JavaScript Beginner's Handbook

→ I wrote 17 books to help you become a better developer, download them all at $0 cost by joining my newsletter

JOIN MY CODING BOOTCAMP, an amazing cohort course that will be a huge step up in your coding career - covering React, Next.js - next edition February 2025

Bootcamp 2025

Join the waiting list