---
title: "Discussion on \"How Do Global Execution Context and Temporal Dead Zone Work in JavaScript?\" | Hashnode"
description: "Discussion on \"How Do Global Execution Context and Temporal Dead Zone Work in JavaScript?\". Have you ever wondered how JavaScript runs your code behind the scenes, and how the Global Execution Context actually works? How does hoisting work for var, let, and const?\nConsider the code bellow:\nconsole.log('My age is', age)\nconsole.log('My name ..."
url: "https://hashnode.com/posts/global-execution-context-and-temporal-dead-zone-explained/690b5691972e7bfdc1ed09c1"
---

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# [How Do Global Execution Context and Temporal Dead Zone Work in JavaScript?](https://freecodecamp.org/news/global-execution-context-and-temporal-dead-zone-explained?utm_source=hashnode&utm_medium=feed)

Have you ever wondered how JavaScript runs your code behind the scenes, and how the Global Execution Context actually works? How does hoisting work for var, let, and const? Consider the code bellow: console.log('My age is', age) console.log('My name ...

Nov 5, 2025 · 12 min read · freecodecamp.org  
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## Written by

[Shejan Mahamud](https://hashnode.com/@Shejan-Mahamud)

@Shejan-Mahamud · Rajshahi, Bangladesh

  
[View profile](https://hashnode.com/@Shejan-Mahamud)

Full Stack Engineer

I love figuring out how things work under the hood and why they work the way they do. I'm always curious about the words "how" and "why." I enjoy solving problems in smart ways and learning from every little challenge — whether at work, at home, or even over coffee.

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