cron-expression-validator

cron-expression-validator is a Node.JS library (support typescript) to validate quartz cron expressions

Installation

npm install cron-expression-validator

Usage

isValidCronExpression method reqire string (cron expression) as parameter and returns boolean value

`` js
var cronValidator = require('cron-expression-validator');
var isValid = cronValidator.isValidCronExpression(" ? "); // returns true
`
`js
if(cronValidator.isValidCronExpression(" ? ")) { // returns true
// Your code
}
`
`js
if(cronValidator.isValidCronExpression(" *")) {
// returns false
}
`

$3

Can get error message by passing ` { error: true } ` as second parameter


`js
if(cronValidator.isValidCronExpression(" 25/2 ? *", {error: true}) {
/** returns {
/* isValid: false,
/* errorMessage: [ 'Month values must be between 1 and 12' ]
/* }
**/
}
`

` js
if(cronValidator.isValidCronExpression(" ? * 123/555", {error: true}) {
/** returns {
/* isValid: false,
/ errorMessage: [ '(Year) - Unsupported value 123 for field. Possible values are 1970-2099 , - /',
/* '(Year) - Expression 555 is not a valid increment value. Accepted values are 0-129'
/* ]
/* }
**/
}
`

` js
if(cronValidator.isValidCronExpression("0 0 12 1/2 ? ", {error: false}) { // returns true
// Your code
}
``

Cron accepted values

Seconds: 0-59 * , -
Minutes: 0-59 * , -
Hours: 0-23 * , -
Day of Month: 1-31 * , - ? L LW
Months: (JAN-DEC or 1-12) * , -
Day of Week: (SUN-SAT or 1-7) * , L - ? #
Year: 1970-2099 * , -

License

MIT