Скачать или смотреть Lecture 3 : JavaScript Executes Code: Call Stack, Hoisting, TDZ, Scope & Closures Explained | FSD

In this session, we demystify how JavaScript actually runs your code—from the call stack managing execution contexts, to hoisting that elevators declarations to the top, to the notorious temporal dead zone (TDZ) where let/const are inaccessible before declaration, and finally into lexical scope and powerful closures that let inner functions retain access to outer variables even after execution ends. These core concepts are vital for writing robust, bug-free JS and understanding why your variables behave the way they do 👨‍💻. Join us and build a stronger foundation in how JS executes code, keeps track of scope, and enables clean architecture.

Video Timestamps :-
0:00 Introduction
0:53 Question - How does JavaScript execute your code?
1:39 What is JavaScript
2:55 What does "Synchronus" Mean?
3:33 What is Single-threaded?
4.22 What is an Execution Context?
5:50 How is Js code executed?
10:52 The Execution Phases
11:13 Memory Creation Phase(Variables/Functions allocated)
14:30 Global execution Contexts
19:22 Code Execution Phase ( Code runs line by line)
21:43 Function Execution contexts
27:57 What is the Call Stack?
33:14 Example
47:31 Example - Interview question
49:43 What is Hosting?
57:22 Example - Interview question
1:01:14 Understanding Scope
1:02:10 Types of Scope in JS
1:07:35 Temporal dead zone
1:09:44 Window
1:14:43 Closures - What are they?
1:22:04 Conclusion

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Lecture 3 : JavaScript Executes Code: Call Stack, Hoisting, TDZ, Scope & Closures Explained | FSD

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