how does the node.js event loop work???

Asked 197 days ago

1 Answeres

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The Node.js event loop is a mechanism that handles asynchronous operations. It processes tasks in phases:
- Timers
– Executes
setTimeout()
and
setInterval()
callbacks.
- Pending Callbacks
– Handles I/O callbacks deferred from the previous cycle.
- Idle/Prepare
– Internal tasks for optimization (not user-facing).
- Poll
– Retrieves new I/O events and executes callbacks.
- Check
– Executes
setImmediate()
callbacks.
- Close Callbacks
– Handles
close
events like
socket.on('close')
.
It continuously cycles through these phases, managing non-blocking I/O operations efficiently.


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