JavaScript Tutorial

Discover the power of interactive web development with our JavaScript tutorials. Learn to create dynamic websites, animations, games, and user-friendly experiences. Start your coding journey today!

Java
Python
JavaScript
NodeJS
HTML
SQL
CSS
C++
ReactJs

Introduction To JavaScript

Introduction to JavaScript: JavaScript is a programming language that allows you to implement complex features on web pages. JavaScript makes...

Syntax in JavaScript

Syntax rules are like the grammar of JavaScript. If you don't follow them, your code won't work, and you'll encounter...

JavaScript Comments

Comments in JavaScript are not just space fillers; they're powerful tools that help make your code more readable and maintainable....

JavaScript Variables

In programming, variables are fundamental. They act as storage containers for data values. JavaScript variables are dynamically typed, which means...

DataType In JavaScript

The type of data a variable can hold is called its Data type. Explore more about DataTypes In JavaScript....

JavaScript Operators

In JavaScript, Operators is a special symbol used to perform operations on operands (values and variables)....

JavaScript Type Conversion

Implicit Type Conversion is also known (and more commonly referred to) as Coercion while Explicit Type Conversion is also known as Type Casting....

JavaScript Conditional Statements

A conditional statements, also known as a control statement or branching statement, is a fundamental JavaScript programming construct that allows...

Scope in JavaScript

Scope in JavaScript refers to the current context of code, which determines the accessibility of variables to JavaScript. In simple terms,...

Hoisting in JavaScript

Hoisting in JavaScript is a behavior in which variable and function declarations are moved to the top of their scope...

Strict Mode in JavaScript

Strict mode throws errors when trying to modify read-only properties or deleting undeletable properties....

JavaScript Loops

In JavaScript, loops are control structures that allow you to repeatedly execute a block of code as long as a...

Function in JavaScript

In JavaScript, a function is a reusable block of code that can be defined and then executed whenever needed. Functions...

JavaScript Object

In JavaScript, an object is an unordered collection of key-value pairs. Each key-value pair is called a property....

Array in JavaScript

An array in JavaScript is a data structure that allows you to store and organize a collection of values. These...

JavaScript Array Methods

JavaScript array are high-level, list-like objects that come equipped with various methods and properties to facilitate the manipulation and querying...

JavaScript String

The string is a group of characters. It can include a-z, A-z, 0-9, and also all special characters like #,@,$, etc....

JavaScript String Methods

JavaScript string methods are functions that you can use on strings (text). They allow you to manipulate, search, or modify...

JavaScript Date

In JavaScript, handling dates and times is an essential aspect of many applications, ranging from simple date display to complex...

JavaScript Math Object

In JavaScript, the Math object serves as a powerhouse for performing mathematical operations, ranging from basic arithmetic to advanced calculations. ...

JavaScript Number

In JavaScript, number are fundamental data types used for representing numeric values in various contexts, from simple arithmetic operations to...

Boolean JavaScript

In JavaScript, boolean represent a binary value indicating either true or false. Booleans are essential for controlling the flow of...

JavaScript Sets

JavaScript Sets provide a powerful data structure for storing unique values of any data type, whether primitive values or object...

Map JavaScript

JavaScript Map provide a powerful and flexible way to store key-value pairs, offering efficient methods for adding, accessing, and removing...

Higher Order Function in JavaScript

Higher-order functions are a fundamental concept in functional programming and JavaScript, encapsulating a powerful and expressive programming paradigm. These functions...

JavaScript map Method

When you're building websites or apps, you often deal with loads of data. Sometimes, this data isn't quite ready for...

JavaScript Reduce Method

The JavaScript reduce() method is used to accumulate or reduce the elements of an array to a single value. It...

JavaScript Filter Method

The filter() method in JavaScript is like a gatekeeper for your arrays, letting through only the elements that meet certain...

JavaScript forEach Method

The JavaScript forEach() method, introduced in ECMAScript 5 (2009), offers a more modern and functional approach to iterating over array...

JavaScript for…of Loop

The for...of loop in JavaScript offers a simplified syntax for iterating over iterable objects, including arrays, strings, NodeLists, and more,...

JavaScript for…in loop

The for...in statement in JavaScript is an efficient way to iterate over the properties of an object, providing a straightforward...

JavaScript This Keyword

This keyword in JavaScript refers to an object that is executing in the current code. Like the 'window' object executes...

JavaScript Function Call() Method

JavaScript call() method is a powerful tool that allows you to invoke functions in a specific context, enabling you to...

JavaScript Funtion Apply() Method

JavaScript apply() method is a powerful tool similar to the call() method, allowing you to invoke functions with a specified...

JavaScript Function Bind() Method

JavaScript bind() method is a powerful tool that allows you to create a new function with a specified this value...

Synchronous Programming

Synchronous programming in JavaScript processes the code line by line, blocking execution on one task until the previous task is...

Asynchronous Programming

Asynchronous programming is a very important concept in JavaScript, through which tasks execute in a concurrent manner, making applications perform...

Difference Between Synchronous and Asynchronous programming

Synchronous and Asynchronous programming both are very important for any JavaScript developer. JavaScript, as a language, has come a long...

Keyboard Event In JS

Keyboard event is feature of JavaScript. Its ability to handle user interactions through events., enabling developers to respond to user...

Mouse Event in JS

Mouse event in JavaScript are a fundamental aspect of creating interactive web applications. They enable developers to capture and respond...

What is Callback In JS?

Callback In JS, function is one that passes as an argument to another function and executes after an event or...

Disadvantage of Callback In JS

Callback in JavaScript ,are functions for handling tasks like event handling and data-fetching. Callbacks are powerful tools, they also come...

What is Promise in js?

Promises form one of the basic building blocks of asynchronous programming in JavaScript. They represent a value that might be...

Promise Handling in JS

Promise is a powerful feature in JavaScript introduced in ES6 (ECMAScript 2015) to effectively deal with asynchronous operations and avoid...

Async and Await Syntax

The async and await syntax is a special syntax created to help you work with promise objects. It makes your code...

How to Fetch an API?

In the current interconnected world, web developers have come to be highly dependent on accessing and merging with external information...

Set In JS

In JavaScript, a Set is a collection of unique values. It can store any type of value, whether primitive values...

Map Objects in JS

A Map object is a collection of key-value pairs where both keys and values can be of any data type....

Symbol Data Type In JS

Symbol in JS is one of the primitive data types, like strings, numbers, and booleans. The Symbol data type stands...

Arrow Function In JS

In JavaScript, functions are blocks of code that can be named and reused throughout a program. They are defined using...

Hoisting in JS

Hoisting in JS, represents a key concept in JavaScript that can sometimes be confusing. It involves moving variable and function...

Closure in JavaScript

Closure in Javascript are one of the most important concepts in JavaScript, enabling many of the language's most powerful features....

Currying In JavaScript

Currying, which is named in honor of mathematician Haskell Curry, is a process of rewriting functions that are defined over...

TypeScript V/S JavaScript

JavaScript is a high-level, interpreted programming language that is one of the core technologies of the web, alongside HTML and...

Document.getElementsbyName Method in JavaScript

DOM manipulation in JavaScript can be done in several ways, and each is designed to be optimal for one or...

JavaScript Variables

In programming, variables are fundamental. They act as storage containers for data values. JavaScript variables are dynamically typed, which means...

DataType In JavaScript

The type of data a variable can hold is called its Data type. Explore more about DataTypes In JavaScript....

JavaScript Operators

In JavaScript, Operators is a special symbol used to perform operations on operands (values and variables)....

Hoisting in JavaScript

Hoisting in JavaScript is a behavior in which variable and function declarations are moved to the top of their scope...

Function in JavaScript

In JavaScript, a function is a reusable block of code that can be defined and then executed whenever needed. Functions...

JavaScript map Method

When you're building websites or apps, you often deal with loads of data. Sometimes, this data isn't quite ready for...

JavaScript Reduce Method

The JavaScript reduce() method is used to accumulate or reduce the elements of an array to a single value. It...

JavaScript Filter Method

The filter() method in JavaScript is like a gatekeeper for your arrays, letting through only the elements that meet certain...

Disadvantage Of Promise

JavaScript, a dynamic and versatile language, has various mechanisms for handling asynchronous operations, with Promises being one of the most...

Spread Operator in JS

The spread operator in js, introduced in ECMAScript 2015 (ES6), is a powerful and concise tool in JavaScript that allows...

Default Parameters in JS

Default parameters in JS, introduced in ECMAScript 2015 (ES6), are a powerful feature in JavaScript that allow developers to set...

Modules in JavaScript

Modules in JavaScript are a way to organize code into reusable pieces, improving maintainability and scalability. They provide a mechanism...

Destructuring in JavaScript

Destructuring in JavaScript is a powerful feature introduced in ECMAScript 2015 (ES6) that provides a concise way to extract values...

Template Literals in JavaScript

Template literals in JavaScript, introduced in ECMAScript 2015 (ES6), provide a more flexible and readable way to create strings in...

Rest Operator In JS

Rest Operator in JS consists of a set of three dots (.) placed together and used to capture multiple elements...

SetTimeout in JavaScript

SetTimeout in JavaScript is a powerful function that allows you to delay the execution of code. This can be particularly...

SetInterval In JavaScript

SetInterval() is a JavaScript function that allows you to schedule a function or expression to be executed repeatedly at specified...

ClearInterval In JavaScript

clearInterval() in a JavaScript is a method used to stop a setInterval or setTimeout function from executing. It takes an...

How to Get the Current Date in JavaScript?

Working with dates and times is a common task in web development, and JavaScript provides several ways to obtain and...

Null and Undefined in JavaScript

Null and undefined in JavaScript are two different concepts in JavaScript and this article explains these two terms in detail....

JavaScript RegEx

Regular expressions are robust tools utilized for pinpointing precise patterns in a given string. Think of them as a tool...

JavaScript Form Validation

The web development stage is so dynamic in nature, form validation ensures that the inputs done by a user in...

call() apply() bind() Methods in JavaScript

JavaScript is a flexible language that offers different methods to alter the context (this) of a function. Among these, the...

Shallow and Deep Copy

In JavaScript, copying objects or arrays can be straightforward, but it's essential to understand the differences between shallow and deep...

Strict Mode in JavaScript

One of JavaScript’s interesting options is the “Strict Mode” which gives an ability to turn on the so called ‘strict...

IIFE Function in JavaScript

In JavaScript, an IIFE (Immediately Invoked Function Expression) is a powerful and widely used pattern that allows you to create...

Console in JavaScript

Console in JavaScript indicates system console of the application and is used to log various information during the process of...

IsNaN In JavaScript

The JavaScript language is multi-purpose, and by default, numeric values manipulation is supported in a wide variety of applications. Now,...

What are Prototypes in JavaScript

JavaScript, a powerful and versatile language, uses prototypes to manage inheritance and share properties and methods between objects. Prototypes are...

What is difference between Spread and Rest Operator in JavaScript?

The modern syntax introduced two powerful features: the spread operator and the rest operator. Both are represented by the same...

Enum in JavaScript

Enums, short for "enumerations," are a feature in many programming languages used to define a set of named constants. While...

What are different Types of Errors in JavaScript ?

Errors are an inevitable part of programming, and handling them effectively is crucial for building robust applications. JavaScript, like other...

Explore Geekster’s Upskilling Course

Full Stack Web Development

Become a full stack web developer with placement guarantee in this beginner friendly course!

  • Eligibility No pre-requisite knowledge required
  • Duration 8 months
I'm Interested
Data Science & Artificial Intelligence

Learn data analysis, machine learning, and data visualisation skills through hands-on projects.

  • Eligibility No pre-requisite knowledge required
  • Duration 8 months
I'm Interested
Youtube Facebook Instagram Linkedin

With you, every step
of the way

Start Learning ->
ABOUT GEEKSTER
Courses
FELLOWSHIP
Explore