JavaScript Lesson 09 | Scope & Closures (Global, Local, Block, Scope Chain) | Javascript Tutorial

Published: 15 December 2025
on channel: DeveloperMaroof

#javascript #scope #closures

JavaScript Lesson 09 | Scope & Closures. Learn global, local and block scope, the scope chain, hoisting differences (var vs let/const), and how closures let inner functions access outer variables. Includes practical console demos and a closure example.

What you’ll learn:
• Global scope vs local scope: where variables are visible
• Block scope (let & const) vs function scope (var)
• Scope chain & lexical scope: how JavaScript resolves identifiers
• Closures: inner functions retaining access to outer variables (closure example included)
• Debugging scope with DevTools Console

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