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cron

Cron jobs for your node


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What is cron?

The cron npm package is used for scheduling tasks to be executed at specific times or intervals. It is inspired by the Unix cron scheduler and allows for the use of cron syntax to schedule tasks in a Node.js environment. This package is useful for setting up jobs like backups, sending emails, or cleaning up databases at regular intervals.

What are cron's main functionalities?

Basic Cron Job

This feature allows you to create a basic cron job that runs at a specified interval. In the provided code sample, a new CronJob is created that logs a message to the console every second.

"const CronJob = require('cron').CronJob;\nconst job = new CronJob('* * * * * *', function() {\n  console.log('You will see this message every second');\n}, null, true, 'America/Los_Angeles');\njob.start();"

Time Zone Support

This feature demonstrates the ability to specify a time zone for the cron job. The code sample schedules a job to run at 11:30 AM, according to the 'America/New_York' time zone, from Monday to Friday.

"const CronJob = require('cron').CronJob;\nconst job = new CronJob('00 30 11 * * 1-5', function() {\n  console.log('This runs at 11:30 AM (server time) every Monday through Friday.');\n}, null, true, 'America/New_York');\njob.start();"

Dynamic Job Scheduling

This feature allows for dynamic scheduling of jobs. The schedule can be updated or changed based on certain conditions or inputs. In the example, the 'dynamicSchedule' variable can be updated to change the job's schedule.

"const CronJob = require('cron').CronJob;\nlet dynamicSchedule = '00 30 11 * * 1-5'; // This can be dynamically changed\nconst job = new CronJob(dynamicSchedule, function() {\n  console.log('This job's schedule can be dynamically changed.');\n}, null, true, 'America/Los_Angeles');\njob.start();"

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Package last updated on 08 Apr 2024

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