JavaScript-QnA

23 posts

How is a JavaScript Hash Map Implemented?

Last Updated: 20 December 2024

A HashMap (also known as a dictionary or hash table in other programming languages) is a collection of key-value pairs Each key in the HashM ...read more

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JavaScript-QnA

JavaScript Object Interview Questions

Last Updated: 22 November 2024

JavaScript objects are fundamental data structures used to store collections of data in key-value pairs. They are essential for handling mor ...read more

Interfaces in TypeScript

Last Updated: 11 March 2025

TypeScript is a statically typed superset of JavaScript that adds optional types, classes, interfaces, and other features to help developers ...read more

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How to Declare Variables in TypeScript ?

Last Updated: 09 July 2024

In TypeScript, a variable can be defined by specifying the data type of the value it is going to store. It will store the values of the spec ...read more

Last Updated: 20 March 2025

TypeScript Enums allows you to create a list of constants (unchanging variables) and give them easy-to-remember names. These names make your ...read more

How to Check if an Element Exists in an Array in JavaScript?

Last Updated: 07 November 2024

Given an array, the task is to check whether an element present in an array or not in JavaScript. If the element present in array, then it r ...read more

What is Type Annotations in TypeScript ?

Last Updated: 21 January 2025

TypeScript Type Annotations allow developers to explicitly define the types of variables, functions, and other elements in the program.They ...read more

Temporal Dead Zone in JavaScript

Last Updated: 01 February 2025

The Temporal Dead Zone refers to the period between the entering of a scope and the actual declaration of a variable using let or const. Dur ...read more

What is Call in JavaScript ?

Last Updated: 07 February 2024

The call method is used to invoke the function with differentthisobject. In JavaScript,thisrefers to an object. It depends on how we are cal ...read more

What is the use of the Fetch API in JavaScript ?

Last Updated: 06 February 2024

The Fetch API in JavaScript provides a modern, powerful, and flexible way to make HTTP requests from web browsers or Node.js environments. I ...read more

What is Destructuring in ES6?

Last Updated: 13 February 2025

Destructuring in JavaScript allows you to extract values from arrays or objects and assign them to variables in a concise and readable way. ...read more

What is a Blob Object in JavaScript ?

Last Updated: 31 January 2024

In JavaScript, a Blob (Binary Large Object) is an object that represents raw binary data(collection of bytes). It is commonly used to handle ...read more

Web Technologies

JavaScript

JavaScript-QnA

Explain The Concept of Truthy & Falsy Values in JavaScript

Last Updated: 09 December 2024

In JavaScript, truthy and falsy values are concepts related to boolean evaluation. Every value in JavaScript has an inherent boolean "truthi ...read more

Generate Random Number in Given Range Using JavaScript

Last Updated: 31 December 2024

Here are the different ways to generate random numbers in a given range using JavaScript1. Using Math.random(): basic ApproachThis is the si ...read more

Interesting Facts About JavaScript

Last Updated: 23 November 2024

JavaScript (often abbreviated as JS) is one of the most popular programming languages in the world. It is an interpreted, high-level program...read more

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