JavaScript Objects

Objects Study Path

Learn Objects in the Right Order:

• First the idea
• Then how to make them
• Then how to use them

Step 1Beginner

JavaScript Objects

• Objects are variables that can store both values and functions
• Objects are one of the most important concepts in JavaScript
• If you understand objects, you understand JavaScript

Step 2Beginner

Object Properties

• JavaScript objects are collections of properties
• Properties can be changed, added and deleted

Step 3Beginner

Object Methods

• Methods are actions that can be performed on objects
• Methods are functions stored as property values

Step 4Beginner

Object this

• In JavaScript, the this keyword refers to an object
• It is used to access the object that is calling a method

Step 5Beginner

Object Display

• Displaying properties by name
• Displaying properties in a loop
• Using Object.values()
• Using JSON.stringify()

Step 6Beginner

Object Constructors

• Sometimes we need to create many objects of the same type.
• To create an object type we use an object constructor function.

Advanced Learning Path

Step 1Advanced

Object Definitions

• Using an Object Literal
• Using the new Keyword
• Using an Object Constructor
• Using Object.assign()
• Using Object.create()
• Using Object.fromEntries()

Step 2Advanced

Object this

When used in an object method, this refers to the object.

Step 3Advanced

Object Iterations

• Object.entries(object)
• Object.keys(object)
• Object.values(object)
• Object.groupBy(object, callback)

Step 4Advanced

Object Get & Set

Getters and setters allow you to define Object Accessors (Computed Properties).

Step 5Advanced

Object Management

• Accessing property descriptors
• Adding or changing properties

Step 6Advanced

Object Protection

• Prevents changes to an object
• Prevents adding properties
• Prevents deleting properties

Step 7Advanced

Object Prototypes

• JavaScript objects inherit properties and methods from a prototype

Step 8Advanced

Object Reference

• All Object Methods and Properties
• Revised July 2025