In JavaScript, Objects are King. If you Understand Objects, you Understand JavaScript. Objects are containers for Properties and Methods. Properties are named Values. Methods are Functions stored as Properties. Properties can be primitive values, functions, or even other objects.

A JavaScript object is a variable that can store multiple values in key-value pairs. In this tutorial, you will learn about JavaScript objects with the help of examples.

Mar 6, 2025 · It includes 18 main exercises, each accompanied by solutions, detailed explanations, and four related problems. [An Editor is available at the bottom of the page to write and execute the scripts.] 1. List Object Properties. Write a JavaScript program to list the properties of a JavaScript object. Click me to see the solution. 2. Delete Property.

Apr 3, 2025 · In addition to objects that are predefined in the browser, you can define your own objects. This chapter describes how to use objects, properties, and methods, and how to create your own objects. You can create an object using an object initializer.

Apr 11, 2025 · Practice using objects and object-oriented techniques in a real-world context. In this article we will write a classic "bouncing balls" demo, to show you how useful objects can be in JavaScript. Our little balls will bounce around on the screen, and …

Jul 11, 2024 · JavaScript Object is the collection of properties and the property is in key, value pair format. These objects are quite different from JavaScript’s primitive data types (Number, String, Boolean, null, undefined, and symbol) in the sense that these primitive data types all store a single value each (depending on their types). Syntax: key1: value1,

Apr 11, 2025 · In this task you are provided with an object literal, and your tasks are to. Store the value of the name property inside the catName variable, using bracket notation.; Run the greeting() method using dot notation (it will log the greeting to the browser's console).; Update the color property value to black.; Try updating the live code below to recreate the finished example:

An object is a collection of key-value pairs. Use the dot notation (.) or array-like notation ([]) to access the property of an object. Use the delete operator to remove a property from an object. Use the in operator to check if a property exists in an object.

Mar 7, 2025 · There are two primary ways to create an object in JavaScript: Object Literal and Object Constructor. 1. Creation Using Object Literal. The object literal syntax allows you to define and initialize an object with curly braces {}, setting properties as key-value pairs. 2. Creation Using new Object () Constructor. 1. Accessing Object Properties.

Jan 1, 2024 · Through a series of 10 real-world exercises, we aim to enhance your understanding and proficiency in working with objects. These exercises are designed to cover various aspects of objects — from...