Why JavaScript Lets You Use Variables Before Declaring Them
In this video, we break down one of the most confusing concepts in JavaScript — hoisting.
Why does JavaScript print undefined instead of throwing an error?
How can functions be called before they are defined?
And why do let and const behave differently?
We’ll answer all of this by connecting hoisting to the execution context and understanding what happens during the creation phase.
This is not magic — it’s just how JavaScript works under the hood.
🔑 Topics covered:
Hoisting explained viusally
var vs let vs const
Function hoisting
Temporal Dead Zone (TDZ)
👉 If you haven’t watched the Execution Context video yet, start there for better understanding.
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