Understanding how JavaScript works behind the scenes, inside the JS Engine will make you a better developer.

How an Execution Context is created and how the Call Stack works.

Hoisting in JavaScript is the most famous Interview Question. And it is also one of the most misunderstood concepts in JS.

Understand how Functions work behind the scenes in JavaScript.

Let's check out the Shortest Program in JavaScript and more about the window and this keyword.

undefined is a special keyword in JavaScript and undefined !== not defined.

Diving deep into Scope, Lexical Environment, and The Scope Chain in JavaScript with a lot of code examples and visuals.

let & const in JavaScript behave differently when they are Hoisted.

Let & const Block Scope in-depth tutorial covers what is a Block, Scope, and Block Scope in JavaScript.

Closures in JavaScript is the most important topic for interviews.

Check out the most frequently asked (setTimeout + Closures in a loop) hot trending JS Interview question.

A JavaScript Interview covering in-depth QnA of closures

Functions in JS are first-class Citizens, what does that mean?

What are Callback Functions in JavaScript? How does Event Listeners work?

In-depth explanation of Event Loop, Web APIs, MicroTask Callback Queue, and how JavaScript works asynchronously in the web browser.

In-depth explanation of JS Engine Architecture, JavaScript Runtime Environment, JIT compilation

This BONUS video covers the fundamentals of setTimeout, how it works behind the scenes.

Functional Programming is powered by Higher-Order Functions in JavaScript.

Map, filter & reduce Array functions are the most popular Higher-Order Functions in JavaScript.