I Find this validation can not support "L" OR "W"，How can do if we need these chat?

[rondsjinhuajin]

[GuillaumeRochat]

@rondsjinhuajin sorry for the late reply, I never received any notification.

I would use the following library which supports more feature : https://github.com/Airfooox/cron-validate

The preset aws-cloud-watch supports those, but not the seconds. I think it's identical to the quartz rules otherwise.

cron('0 12 L * ? *', {
  preset: 'aws-cloud-watch',
})

https://runkit.com/embed/izgywknh0zo9

[GuillaumeRochat]

Ah, even better, you can override their config if needed:

cronValidate('0 0 12 L * ?', {
  preset: 'aws-cloud-watch',
  override: {
    useSeconds: true,
    useYears: false,
  }
}).isValid();