JavaScript var, let, const Explained | Hoisting, Stack & Heap Memory | Beginner to Advanced

Описание: Understanding variables is the foundation of mastering JavaScript.

In this video, we deep dive into var, let, and const, how hoisting actually works, and how JavaScript stores data in Stack and Heap memory.

Most developers use variables daily — but very few truly understand how they behave under the hood. That lack of clarity leads to bugs, scope issues, and confusion later in frameworks like React and Node.

In this video, you’ll learn:

✅ Difference between var, let, and const
✅ What is Variable Hoisting (and how it actually works internally)
✅ Primitive vs Reference Data Types
✅ How JavaScript stores data in Stack & Heap
✅ How memory works behind the scenes
✅ Common mistakes developers make
✅ Interview-ready explanations

By the end of this video, you’ll clearly understand:

Why var behaves differently from let
Why const does not mean immutable
Why objects behave differently than primitives
How memory impacts variable behavior

This is a must-watch before moving to advanced topics like closures, scope, and React.

If you're preparing for JavaScript interviews (beginner to advanced level), this video will strengthen your core fundamentals.

📌 Chapters:
00:00 Introduction
01:20 var vs let vs const
20:35 Hoisting explained
29:25 Primitive vs Reference
39:15 Stack vs Heap Memory