JavaScript Event Loop & Asynchronous Programming

Master the JavaScript Event Loop. This video uses detailed animations and diagrams to show you exactly how JavaScript manages asynchronous tasks while remaining single-threaded. Course from @FrontendDevs1991 ❤️ Support for this channel comes from our friends at Scrimba – the coding platform that's reinvented interactive learning: https://scrimba.com/freecodecamp ⭐️ Contents ⭐️ – 00:00 Introduction to the JavaScript Event Loop – 01:33 Components of the Browser Runtime (Engine, Stack, APIs, and Queues) – 02:13 Understanding the Call Stack and Synchronous Execution – 04:33 The Limitations of the Call Stack – 06:46 Introduction to Web APIs: JavaScript's Superpowers – 10:02 How JavaScript Handles Delays (setTimeout Example) – 14:21 The Role of the Task Queue (Callback Queue) – 16:34 The Event Loop: Connecting the Queue to the Stack – 19:00 Example: Geolocation API and User Permissions – 22:26 Example: DOM Events and Event Listeners – 27:23 Promises, Fetch, and the Microtask Queue – 34:54 Handling Long-Running Synchronous Tasks – 38:35 What Goes into the Microtask Queue? (Promises, Async/Await) – 41:05 Starvation of Functions in the Callback Queue – 44:59 Visualizing Internals in the Browser – 45:38 Conclusion and Final Summary 🎉 Thanks to our Champion and Sponsor supporters: 👾 @omerhattapoglu1158 👾 @goddardtan 👾 @akihayashi6629 👾 @kikilogsin 👾 @anthonycampbell2148 👾 @tobymiller7790 👾 @rajibdassharma497 👾 @CloudVirtualizationEnthusiast 👾 @adilsoncarlosvianacarlos 👾 @martinmacchia1564 👾 @ulisesmoralez4160 👾 @_Oscar_ 👾 @jedi-or-sith2728 👾 @justinhual1290 -- Learn to code for free and get a developer job: https://www.freecodecamp.org Read hundreds of articles on programming: https://freecodecamp.org/news