Object

`Object.create`

Creates a new object, using an existing object as the prototype of the newly created object

Syntax

JavaScript

Object.create(proto, propertiesObject?)

Parameters

Parameter	Type	Description
proto	object \| null	The object that should be the prototype
propertiesObject	PropertyDescriptorMap	Property descriptors for the new object

Return Value

A new object with the specified prototype object and properties

Examples

Basic Usage

const person = {
  greet() { return `Hello, I'm ${this.name}`; }
};
const alice = Object.create(person);
alice.name = 'Alice';
console.log(alice.greet()); // "Hello, I'm Alice"

Practical Example

const nullProto = Object.create(null);
nullProto.key = 'value';
console.log('toString' in nullProto); // false

Advanced Usage

const base = { type: 'vehicle' };
const car = Object.create(base, {
  wheels: { value: 4, writable: false }
});
console.log(car.type); // 'vehicle'
console.log(car.wheels); // 4

Understanding Object.create

The Object.create method in JavaScript creates a new object, using an existing object as the prototype of the newly created object. It belongs to the Object object and is one of the most widely used methods for working with object values in modern JavaScript and TypeScript applications.

The method signature is Object.create(proto, propertiesObject?). It accepts 2 parameters: proto, propertiesObject. When called, it returns a new object with the specified prototype object and properties. Understanding when and how to use create() helps you write more expressive, readable code.

Common use cases for Object.create include data transformation, input validation, API response processing, and building reusable utility functions. It works well alongside related methods like object-assign, object-getprototypeof, object-setprototypeof, enabling you to chain operations together for complex data manipulation pipelines.

Browser support for Object.create is excellent across all modern browsers including Chrome, Firefox, Safari, and Edge. It is also fully supported in Node.js and Deno. For older environments, transpilation with Babel or a polyfill may be needed.