Skip to content

The Object defineProperties() method

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

Creates or configures multiple object properties at once. Returns the object.

Takes 2 arguments. The first is an object upon which weโ€™re going to create or configure the properties. The second is an object of properties.

Example:

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

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

It can be used in conjunction with Object.getOwnPropertyDescriptors() to copy properties over from another object:

const wolf = { /*... */ }
const dog = {}
Object.defineProperties(dog, Object.getOwnPropertyDescriptors(wolf))
โ†’ Download my free JavaScript Handbook!

THE VALLEY OF CODE

THE WEB DEVELOPER's MANUAL

You might be interested in those things I do:

  • Learn to code in THE VALLEY OF CODE, your your web development manual
  • Find a ton of Web Development projects to learn modern tech stacks in practice in THE VALLEY OF CODE PRO
  • I wrote 16 books for beginner software developers, DOWNLOAD THEM NOW
  • Every year I organize a hands-on cohort course coding BOOTCAMP to teach you how to build a complex, modern Web Application in practice (next edition February-March-April-May 2024)
  • Learn how to start a solopreneur business on the Internet with SOLO LAB (next edition in 2024)
  • Find me on X

Related posts that talk about js: