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cron-parser

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cron-parser

Node.js library for parsing crontab instructions

  • 2.16.2
  • Source
  • npm
  • Socket score

Version published
Weekly downloads
3.8M
decreased by-6.26%
Maintainers
1
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Created

What is cron-parser?

The cron-parser npm package is a utility for parsing crontab instructions. It allows users to interpret cron schedule expressions and calculate the next run times for jobs. It is useful for scheduling tasks in Node.js applications.

What are cron-parser's main functionalities?

Parsing Cron Expressions

This feature allows users to parse a cron expression and get the next execution times. The code sample demonstrates how to parse a cron expression that runs every 2 minutes and log the next execution time.

const cronParser = require('cron-parser');

try {
  const interval = cronParser.parseExpression('*/2 * * * *');
  console.log('Date: ', interval.next().toString()); // Get the next date
} catch (err) {
  console.error('Error: ' + err.message);
}

Iterating Over Execution Times

This feature allows users to iterate over the execution times of a cron job. The code sample demonstrates how to get the next 5 execution times for a cron expression that runs at the start of every hour.

const cronParser = require('cron-parser');

try {
  const interval = cronParser.parseExpression('0 * * * *');
  for (let i = 0; i < 5; i++) {
    console.log('Date: ', interval.next().toString()); // Get the next 5 dates
  }
} catch (err) {
  console.error('Error: ' + err.message);
}

Handling Cron Expression with Timezone

This feature allows users to parse a cron expression with a specific timezone. The code sample demonstrates how to parse a cron expression that runs at the start of every hour, considering the timezone of Europe/Amsterdam.

const cronParser = require('cron-parser');

try {
  const options = {
    currentDate: new Date('Wed, 26 Dec 2012 14:38:53 GMT'),
    tz: 'Europe/Amsterdam'
  };
  const interval = cronParser.parseExpression('0 * * * *', options);
  console.log('Date: ', interval.next().toString()); // Get the next date considering timezone
} catch (err) {
  console.error('Error: ' + err.message);
}

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Package last updated on 07 Aug 2020

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