2025

Explain async/await in JavaScript.

August 16, 2025

🔹 1. What is async/await? 🔹 2. The async keyword Even though return "Hello!" is not explicitly wrapped in a...

What is a promise?

August 16, 2025

In JavaScript, a Promise is an object that represents the eventual completion (or failure) of an asynchronous operation and its...

Difference between import and require.

August 16, 2025

Let’s break down the difference between import and require in JavaScript/Node.js: 1. Origin 2. Synchronous vs Asynchronous 3. Static vs...

What is spread and rest operator?

August 16, 2025

In JavaScript, both the spread and rest operators use the same syntax ... but they serve different purposes depending on...

What are modules in JavaScript?

August 16, 2025

In JavaScript, modules are reusable pieces of code that are stored in separate files and can be imported or exported...

What are template literals?

August 16, 2025

Template literals in JavaScript are a special way of working with strings.They were introduced in ES6 (ECMAScript 2015) and provide...

What is destructuring?

August 16, 2025

In JavaScript, destructuring is a convenient way to extract values from arrays or objects and assign them to variables in...

Difference between forEach and map.

August 16, 2025

1. Purpose 2. Return Value 3. Usage Example 4. When to Use 👉 In short:

How do you clone an array?

August 16, 2025

In JavaScript, cloning (copying) an array means creating a new array with the same elements, without referencing the original one....

What are array methods like map, filter, reduce?

August 16, 2025

In JavaScript, array methods like map, filter, and reduce are higher-order functions. They allow you to transform, filter, and combine...