Glossary term
What is callback queue (Callback (task) queue)?
callback queue stands for Callback (task) queue.
Where finished timers and events wait for the call stack to empty. The event loop takes from it one callback at a time.
Learn it properly · JavaScript CoreLesson 14: Async JS and the Event LoopCall stack, Web APIs, callback queue, microtask queue and the event loop that ties them together, stepped tick by tick — plus async/await, where rendering fits, starvation, and why setTimeout(0) is not 0.