Answer
Microtasks include promise callbacks and queueMicrotask. Macrotasks include timers, I/O callbacks, and setImmediate. Microtasks run before macrotasks within each event loop cycle.
Quick Answer
Microtasks (Promise callbacks, queueMicrotask) run before the event loop moves to the next phase — they drain completely between each event loop tick. Macrotasks (setTimeout, setInterval, I/O callbacks) are picked up one at a time per event loop iteration. Microtasks have higher priority — a Promise chain can delay macrotasks if it keeps adding more microtasks.
S
SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ