JS: Object Object

By Xah Lee. Date: . Last updated: .

Object is the value of the property key "Object" of the global object.

console.log ( window["Object"] === Object ); // true

Object is a function.

[see JS: Data Types]

// type of Object
console.log ( typeof Object === "function" ); // true

The parent of Object is Function.prototype.

// parent of Object object
console.log ( Object.getPrototypeOf ( Object ) === Function.prototype ); // true

The purpose of Object is:

  1. To convert primitive value (such as string, number, boolean) to a object. (by Object(…))
  2. Used as a namespace to hold general purpose methods for working with objects. For example, Object.isExtensible(…).
  3. Holds the property key "prototype". The value of Object.prototype is the root parent object of all standard objects. (so they inherit useful methods.) [see JS: Prototype and Inheritance]

For tutorial, see JS: Object System Overview.

Object Consructor

JS: Object Constructor

See also: JS: Object Literal Expression

Properties


Object.prototype

The value of Object.prototype is the root parent of all standard builtin objects.

[see JS: Object.prototype]


Object.create

[see JS: Object.create]

Object.assign

[see JS: Object.assign]

Object.getPrototypeOf

[see JS: Object.getPrototypeOf]

Object.setPrototypeOf

[see JS: Object.setPrototypeOf]

Object.getOwnPropertyDescriptor

[see JS: Object.getOwnPropertyDescriptor]

Object.defineProperty

[see JS: Object.defineProperty]

Object.defineProperties

[see JS: Object.defineProperties]


Object.getOwnPropertyNames

[see JS: Object.getOwnPropertyNames]

Object.getOwnPropertySymbols

[see JS: Object.getOwnPropertySymbols]


Object.keys

[see JS: Object.keys]


Object.is

[see JS: Object.is]

Object.isExtensible

[see JS: Object.isExtensible]

Object.isFrozen

[see JS: Object.isFrozen]

Object.isSealed

[see JS: Object.isSealed]


Object.preventExtensions

[see JS: Object.preventExtensions]

Object.freeze

[see JS: Object.freeze]

Object.seal

[see JS: Object.seal]

Reference

ECMAScript 2015 §Fundamental Objects#sec-object-objects

Object and Inheritance Topic

  1. JS: Object System Overview
  2. JS: What's Object?
  3. JS: Prototype and Inheritance
  4. JS: Create Object
  5. JS: Object Literal Expression
  6. JS: Find Object's Prototype
  7. JS: Set Object's Prototype
  8. JS: How to Create Object with Parent X?
  9. JS: Prevent Adding Property
  10. JS: Determine Type of Object
  11. JS: Primitive Value Object Wrapper
  12. JS: Clone, Deep Copy Object/Array
  13. JS: Test Equality of Objects

  1. JS: Object Object
  2. JS: Object.prototype
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