Node.js · Junior · Question 42 of 75

Is `emitter.emit()` synchronous or asynchronous?

1Asynchronous: listeners run on the next event loop tick
✓Correct answer: Synchronous: all listeners run immediately, in the order they were added
3It depends on the event name

Explanation

emit calls listeners one by one before it returns. A slow listener therefore blocks the code that emitted the event.

Further reading

Node.js API: Events ↗

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