event-loop – Page 2 – Tarik Billa

Difference between microtask and macrotask within an event loop context

October 10, 2022 by Tarik

One go-around of the event loop will have exactly one task being processed from the macrotask queue (this queue is simply called the task queue in the WHATWG specification). After this macrotask has finished, all available microtasks will be processed, namely within the same go-around cycle. While these microtasks are processed, they can queue even … Read more

Why is setTimeout(fn, 0) sometimes useful?

September 5, 2022 by Tarik

In the question, there existed a race condition between: The browser’s attempt to initialize the drop-down list, ready to have its selected index updated, and Your code to set the selected index Your code was consistently winning this race and attempting to set drop-down selection before the browser was ready, meaning that the bug would … Read more