JS: Object Object

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

• Object.create ( O, Properties )
• Object.assign ( target, sources, … ) (ES2015)

• Object.getPrototypeOf ( O )
• Object.setPrototypeOf ( O, proto ) (ES2015)

• Object.getOwnPropertyDescriptor ( O, P )
• Object.defineProperty ( O, P, Attributes )
• Object.defineProperties ( O, Properties )

• Object.getOwnPropertyNames ( O )
• Object.getOwnPropertySymbols ( O ) (ES2015)
• Object.keys ( O )

• Object.is ( value1, value2 ) (ES2015)
• Object.isExtensible ( O )
• Object.isFrozen ( O )
• Object.isSealed ( O )

• Object.preventExtensions ( O )
• Object.freeze ( O )
• Object.seal ( O )

---

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