What is the event loop in JavaScript, and how does it work?
🔁 *Master the JavaScript Event Loop* – Understand Asynchronous Code Like Never Before!
Ever wondered how JavaScript handles multiple tasks at once without multithreading? In this deep dive, you’ll learn exactly how the *JavaScript Event Loop* works, including real-world examples of `setTimeout()`, `Promises`, `async/await`, and more.
📌 *In This Video:*
What is the Event Loop?
How JavaScript runs async code
The Call Stack, Web APIs, Callback Queue & Microtask Queue
How `setTimeout()`, `fetch()`, and Promises interact with the Event Loop
Real code examples that make these concepts finally click
🎯 *Who this video is for:*
Whether you’re a beginner learning asynchronous JavaScript, or an experienced dev looking to ace your next interview or debug complex async issues — this video will clear up everything.
🧠 📚 Chapters: 00:00 – Intro: What is the Event Loop?
00:48 – Why doesn’t setTimeout block code?
01:05 – Event Loop Explained with a Diagram
01:22 – Call Stack & Synchronous Code
01:55 – Third-party APIs & Code Execution
02:07 – How Synchronous Code Runs
02:33 – Microtask Queues & Stacks
02:58 – What are Macrotasks?
03:40 – Execution Order: Sync → Microtasks → Macrotasks
04:23 – Microtasks vs Macrotasks
04:46 – Call Stack and Queue Flow
05:15 – HTML + JS Example: Sync Execution
06:50 – Sync Function Execution Ends
07:45 – setTimeout & Web API Example
08:43 – setTimeout with 0 Delay Explained
09:30 – Promises Run Before Macrotasks
09:57 – Another Example: Logs, Promises & Timers
10:54 – Real-World API Fetch Example
11:33 – Fetch + setTimeout Order
12:32 – Promise Resolution Before setTimeout
13:16 – Final Output Order Recap
14:14 – Callbacks vs Promises
15:24 – Recap: Event Loop Summary
15:47 – Ask Questions & Channel Update
16:30 – Future Videos Preview
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#JavaScript #EventLoop #AsyncJS #JavaScriptTutorial #WebDev #CodingDeepDive #setTimeout #Promises
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