Скачать или смотреть JavaScript Hoisting Explained Deeply (with Clear Examples) | var, let, const, TDZ

Welcome back!
Today’s lesson is a deep dive into Hoisting in JavaScript — one of the most confusing topics for beginners and even intermediate developers.

In this video, you’ll learn:

• What hoisting actually means
• How JavaScript’s compilation phase works
• Why var becomes undefined
• Why let and const throw ReferenceError
• What the Temporal Dead Zone (TDZ) really is
• Function hoisting: declarations vs expressions
• Real examples with outputs
• Common pitfalls and how to avoid them
• Why you should stop using var in modern JavaScript

Examples covered:

• console.log(a); var a = 5
• console.log(x); let x = 10
• Function declaration hoisting
• Function expression hoisting
• Loop hoisting issue with var
• TDZ demonstration
• Understanding undefined vs ReferenceError

If you're learning JavaScript for web development, frontend frameworks, or interview prep — mastering hoisting is a must.