`process.nextTick()`

Schedules a callback to run before the next event loop phase.

Since Node 0.x Spec ↗

Syntax

process.nextTick(callback[, ...args])

Parameters

Name	Type	Required	Description
`callback`	`function`	Yes	The function to invoke after the current operation completes.
`args`	`...any`	No	Arguments passed to the callback.

Returns

void — Returns nothing.

Examples

console.log('start');
process.nextTick(() => console.log('tick'));
console.log('end');

Output

start
end
tick

function lazy(cb) {
  process.nextTick(cb, null, 42);
}
lazy((err, v) => console.log(v));

Output

Notes

The nextTick queue drains completely before any Promise microtasks and before timers or I/O. Recursive `nextTick` calls can starve the event loop; prefer `queueMicrotask` or `setImmediate` unless you specifically need this ordering.