Learn how the browser event loop, task queue, microtask queue, and Web APIs work together to enable non-blocking, asynchronous JavaScript. 

📝  Blog Post: https://www.lydiahallie.com/blog/event-loop
📚  HTML spec: https://html.spec.whatwg.org/multipage/webappapis.html#event-loops
👩‍🏫 Check out my JavaScript Visualized Course on FrontendMasters!  https://frontendmasters.com/courses/javascript-quiz/

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Timestamps:
0:00 Intro
0:32 Call Stack
1:18 Single-threaded Problem
2:01 Web APIs
2:47 Callback-based APIs
4:04 Task Queue
4:39 setTimeout
6:22 Microtask Queue
8:40 Promisifying Callbacks
8:57 Challenge
10:52 Recap
11:58 Outro

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The post explains the event loop, web APIs, and (micro)task queue in JavaScript. It discusses how JavaScript handles long running tasks and offloads them to the browser using web APIs. The post also explains the difference between callback-based and promise-based web APIs.

JavaScript Visualized - Event Loop, Web APIs, (Micro)task Queue