We know cron is a task scheduler which is used in Unix based operating systems. It will execute something on a schedule using its syntax. In Node.js we have node-cron which is a module in pure JavaScript and it is based on GNU crontab. Let’s get started with task scheduling using node-cron.

Install node-cron using npm.

$ npm install --save node-cron

Now we import node-cron and schedule the task as given below:

var cron = require('node-cron');

cron.schedule('* * * * *', () => {

    console.log('running a task every minute');

});

We can specify cron values using the allowed ranges or fields. Following are the ranges.

Seconds: 0-59

Minutes: 0-59

Hours: 0-23

Day of Month: 1-31

Months: 0-11 (Jan-Dec)

Day of Week: 0-6 (Sun-Sat)