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: How to Create Object with Parent X?
  8. JS: Prevent Adding Property
  9. JS: Determine Type of Object
  10. JS: Primitive Value Object Wrapper
  11. JS: Clone, Deep Copy Object/Array
  12. JS: Test Equality of Objects

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