Node.js library for parsing crontab instructions
npm install cron-parser* * * * * *
┬ ┬ ┬ ┬ ┬ ┬
│ │ │ │ │ |
│ │ │ │ │ └ day of week (0 - 7) (0 or 7 is Sun)
│ │ │ │ └───── month (1 - 12)
│ │ │ └────────── day of month (1 - 31)
│ │ └─────────────── hour (0 - 23)
│ └──────────────────── minute (0 - 59)
└───────────────────────── second (0 - 59, optional)
Supports mixed use of ranges and range increments (L, W and # characters are not supported currently). See tests for examples.
Simple expression.
var parser = require('cron-parser');
try {
var interval = parser.parseExpression('*/2 * * * *');
console.log('Date: ', interval.next().toString()); // Sat Dec 29 2012 00:42:00 GMT+0200 (EET)
console.log('Date: ', interval.next().toString()); // Sat Dec 29 2012 00:44:00 GMT+0200 (EET)
console.log('Date: ', interval.next().toUTC().toString()); // Sat Dec 28 2012 22:46:00 GMT+0200 (EET)
} catch (err) {
console.log('Error: ' + err.message);
}Iteration with limited timespan. Also returns ES6 compatible iterator (when iterator flag is set to true).
var parser = require('cron-parser');
var options = {
currentDate: new Date('Wed, 26 Dec 2012 12:38:53 UTC'),
endDate: new Date('Wed, 26 Dec 2012 14:40:00 UTC'),
iterator: true
};
try {
var interval = parser.parseExpression('*/22 * * * *', options);
while (true) {
try {
var obj = interval.next();
console.log('value:', obj.value.toString(), 'done:', obj.done);
} catch (e) {
break;
}
}
// value: Wed Dec 26 2012 14:44:00 GMT+0200 (EET) done: false
// value: Wed Dec 26 2012 15:00:00 GMT+0200 (EET) done: false
// value: Wed Dec 26 2012 15:22:00 GMT+0200 (EET) done: false
// value: Wed Dec 26 2012 15:44:00 GMT+0200 (EET) done: false
// value: Wed Dec 26 2012 16:00:00 GMT+0200 (EET) done: false
// value: Wed Dec 26 2012 16:22:00 GMT+0200 (EET) done: true
} catch (err) {
console.log('Error: ' + err.message);
}- currentDate - Start date of the iteration
- endDate - End date of the iteration
- iterator - Return ES6 compatible iterator object
- utc - Enable UTC
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