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JavaScript Object Programming Examples

Last Updated : 11 Jul, 2024

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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).

JavaScript-Object-Programming-Examples — JavaScript Object Programming Examples

Syntax:

let obj = {
    key1: value1,
    key2: value2,
    ...
};

Example: Here is the basic example of a Javascript Object.

JavaScript

let obj = { firstName: "Hello", lastName: "Geeks" } console.log(obj.firstName + " " + obj.lastName);

Output

Hello Geeks

The following JavaScript section contains a wide collection of JavaScript Object examples. Many of these programming examples contain multiple approaches to solving the problem.

Easy

How to iterate over a JavaScript object
Find the length of a JavaScript object
How to remove a key from JavaScript object
How to add an object to an array in JavaScript
How to remove a property from JavaScript object
How to create an object from the given key-value pairs using JavaScript
How to add key-value pair to a JavaScript object
How to rename object key in JavaScript
How to convert JS object to JSON string in jQuery/JavaScript
How to add and remove properties from objects in JavaScript

Medium:

The Medium level includes articles that delve deeper into working with JavaScript Obejcts, exploring more advanced operations and methods:

How to get a key in a JavaScript object by its value
How to modify an object's property in an array of objects in JavaScript
How to remove duplicates from an array of objects using JavaScript
Convert an array to an object in JavaScript
How to implement a filter for objects in JavaScript
How to remove array element based on object property in JavaScript
How to push an object into another object in JavaScript
How to push an array into the object in JavaScript
How to group objects in an array based on a common property into an array of arrays in JavaScript
How to compare arrays of objects in JavaScript
How to sort an array of objects by property values
How to convert an object to an array of key-value pairs in JavaScript
How to append an object as a key-value in an existing object in JavaScript
How to get the class name of an object in JavaScript
How to perform CRUD operations on JavaScript object
How to convert an object to string using JavaScript
How to create dynamic values and objects in JavaScript
How to swap key and value of JSON element using JavaScript
How to clone a JavaScript object
How to get the last item of JavaScript object
JavaScript get the index of an object by its property
How to find property values in an array of object using if else condition in JavaScript
How to get a subset of a JavaScript object's properties
JavaScript program to put an image file in a JSON object
How to use foreach with an array of objects in JavaScript
How to convert an object into array of objects in JavaScript

Hard:

The Hard level includes articles that cover more intricate and less common tasks

How to check if a value is object-like in JavaScript
How to convert a plain object into ES6 Map using JavaScript
How to compare two objects to determine the first object contains equivalent property values to the second object in JavaScript
Explain prototype inheritance in JavaScript
How a function returns an object in JavaScript
How to create an object with prototype in JavaScript
Difference between composition and inheritance in JavaScript
How to implement a filter for objects in JavaScript
Flatten JavaScript objects into a single-depth object
How to remove blank attributes from a JavaScript object
Differences between document and window objects
How to deep freeze an object in JavaScript
How to swap two array of objects values using JavaScript
Write a program to convert an array of objects to a CSV string that contains only the columns specified using JavaScript
How to call the constructor of a parent class in JavaScript
How to convert two-dimensional array into an object in JavaScript
How to merge properties of two JavaScript objects dynamically
How to create object properties in JavaScript
How to serialize an object into a list of URL query parameters using JavaScript
How to get all the methods of an object using JavaScript
How to check if the provided value is an object created by the Object constructor in JavaScript
How to loop through a plain object with the objects as members in JavaScript
How to convert URL parameters to a JavaScript object
How to do piping/streaming of JavaScript objects in Node.js
How to test a string as a literal and as an object in JavaScript
How to unflatten an object with the paths for keys in JavaScript
How to use array that include and check an object against a property of an object
How to create an object from two arrays in JavaScript
How to get an object containing parameters of current URL in JavaScript
JavaScript program to access non-numeric object properties by index
How to transform JSON text to a JavaScript object
How to check if a JavaScript object is a DOM object
How to convert an array of objects into unique array of objects in JavaScript
How to convert a JavaScript object to a query string
How inheritance works in constructor functions in JavaScript
How to create a chart from JSON data using fetch get request - Fetch API in JavaScript
How to declare object with computed property name in JavaScript
JavaScript Window Location and Document Location Objects
Max/Min value of an attribute in an array of objects in JavaScript
How to use a variable for a key in a JavaScript object literal

We have a complete list of Javascript Object methods, to check those please go through this JavaScript Object Complete Reference article.

We have created a complete JavaScript Tutorial to help both beginners and experienced professionals. Please check this JavaScript Tutorial to get the complete content from basic syntax and data types to advanced topics such as object-oriented programming and DOM manipulation.

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