Object.create()
Creates a new object with the specified prototype and optional properties.
Syntax
Object.create(proto, propertiesObject)Parameters
| Name | Type | Required | Description |
|---|---|---|---|
proto | object | null | Yes | The prototype for the new object, or null for no prototype. |
propertiesObject | object | No | Property descriptors to define on the new object (same format as Object.defineProperties). |
Returns
object — A new object with the given prototype and properties.
Throws
TypeError— proto is neither an object nor null.
Examples
const proto = { greet() { return 'hi'; } };
const o = Object.create(proto);
console.log(o.greet());
Output
hi
const dict = Object.create(null);
console.log(Object.getPrototypeOf(dict));
Output
null
Notes
`Object.create(null)` makes a prototype-less object - a safe map without
inherited keys like `toString`. Combine with descriptors for fine-grained
property control.
Browser & runtime support
| Environment | Since version |
|---|---|
| chrome | 5 |
| firefox | 4 |
| safari | 5 |
| edge | 12 |
| node | 0.10 |