# The Object defineProperty() method

> Learn how the JavaScript Object.defineProperty() method creates or configures a single object property using a property name and a property descriptor object.

Author: [Flavio Copes](https://flaviocopes.com/about/) | Published: 2019-03-31 | Topics: [JavaScript](https://flaviocopes.com/tags/js/) | Canonical: https://flaviocopes.com/javascript-object-defineproperty/

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:

```js
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.