Core ModulesLesson 31Free preview

Timers Module

This lesson is part of Node.js · All levels

Summary

The timers module provides code execution scheduler such as setTimeout, setInterval, and setImmediate. Timers can be scheduled, canceled with clear, and combined with unref to keep the process alive. Understanding the timer helps you control the asynchronous flow with precision.

Key points

SetTimeout runs the code once after a certain break
SetInterval runs repeated code at the same interval
ClearTimeout and clearInterval cancel the running timer
SetImmediate executes callback at the check event loop phase

Full lesson

Code examples and quizzes

Full lessons, code examples, and quizzes are available to subscribers. 5 questions.