Object() constructor

The Object constructor creates an object wrapper for the given value.

  • If the value is null or undefined, it will create and return an empty object.
  • Otherwise, it will return an object of a Type that corresponds to the given value.
  • If the value is an object already, it will return the value.

When called in a non-constructor context, Object behaves identically to new Object().


new Object()
new Object(value)


Any value.


Creating a new Object

let o = new Object()
o.foo = 42

// Object { foo: 42 }

Using Object given undefined and null types

The following examples store an empty Object object in o:

let o = new Object()
let o = new Object(undefined)
let o = new Object(null)


ECMAScript (ECMA-262)
The definition of 'Object constructor' in that specification.

Browser compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung InternetNode.js
Object() constructorChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 3Opera Full support 3Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support Yes


Full support  
Full support

See also