JavaScript: Create Object

By Xah Lee. Date: . Last updated: .

There are 3 common ways to create data object.

Object Literal Expression

{k1:v1, k2:v2 }

Most useful, when you want to use it as a set of key/value pairs for data.

[see Object Literal Expression]

Object.create()

Object.create()

Most powerful and flexible way to create object, because you can specify parent object, properties, property attributes, all in one function call.

[see Object.create]

Create Object by Operator “new”

new functionName()

complex behavior. It tries to be similar to Java's object oriented programing concepts, but the result is very complex. For some standard objects, such as Date, it's the only way to create it.

[see Operator “new”]

Note: remember that function and array are also objects. So, when you define a function (for example, function f(){}) or create a array (for example, ar = [7,2,4]), you are also creating objects. [see Understand JS Array]

JavaScript Object and Inheritance

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JavaScript in Depth

JavaScript in Depth

Basic Syntax

Value Types

Variable

String

Property

Object and Inheritance

Array

Function

Constructor/Class

Iterable 🌟

Misc