Object

The Object type is used to represent arbitrary collections of properties.

Objects can be created using the object literal, for example, { temperature: 27, unit: "C" }, the constructor function, for example, new Object({ temperature: 27, unit: "C" }), or Object.fromEntries, for example, Object.fromEntries([["temperature", 27], ["unit", "C"]]).

Syntax

Object

Properties

• assign
• create
• defineProperties
• defineProperty
• entries
• freeze
• fromEntries
• getOwnPropertyDescriptor
• getOwnPropertyDescriptors
• getOwnPropertyNames
• getOwnPropertySymbols
• getPrototypeOf
• is
• isExtensible
• isFrozen
• isSealed
• keys
• preventExtensions
• seal
• setPrototypeOf
• values
• constructor
• prototype

Prototype Properties

• constructor
• hasOwnProperty
• isPrototypeOf
• propertyIsEnumerable
• toLocaleString
• toString
• valueOf