let & const in JS | Temporal Dead Zone
MindCraft Frontend Web Dev - JS Essential Lecture 9
Course by: MindCraft

In this lecture, we explore the behavior of let and const in JavaScript, focusing on their differences from var, their hoisting characteristics, and the concept of the Temporal Dead Zone (TDZ). Understanding these concepts is crucial for writing robust and error-free JavaScript code.

Topics Covered:

• 00:00 - Introduction

• 00:16 - Hoisting of let & const in JavaScript

• 00:53 - Code example of let declaration hoisting in JS

• 02:45 - Behind the Scenes of let & const hoisting in browser

• 05:29 - Temporal Dead Zone in JavaScript

• 07:44 - ReferenceError explained in depth

• 09:18 - Relation of global object and variables var, let & const

• 10:54 - Duplicate redeclaration of let and const variables

• 12:39 - Important Difference between let and const

• 13:56 - SyntaxError in JavaScript

• 14:54 - TypeError in JavaScript

• 15:11 - Difference between SyntaxError vs TypeError vs ReferenceError

• 17:52 - Difference between var, let, or const?

• 19:00 - How to avoid Temporal Dead Zone

• 20:07 - Interview Question - Hoisting of let & const

• 20:24 - Teaser - Diving deep into Block Scope of let & const

• 21:07 - Thank you for watching Namaste JavaScript

Gain a thorough understanding of let and const in JavaScript, including their hoisting behaviors, the Temporal Dead Zone, and how to handle common errors like ReferenceError and TypeError. Strengthen your knowledge to write more effective JavaScript code.