Generated cron expressions sometimes incompatible with Quartz (e.g., `0/60` in seconds/minutes field)

[adechoudens]

Hello 👋,

I noticed that some cron strings generated by this package are not valid according to Quartz’s cron validation rules.

For example, if you generate a cron like:

0/60 * * ? * * *

Quartz rejects it with the error:

Increment > 60 : 60

This happens because in Quartz, the valid ranges are:

• Seconds: 1–59
• Minutes: 1–59
• Hours: 1–23

Therefore, increments (*/N or 0/N) must never exceed the maximum value of that field. In this case, 0/60 is invalid, and the highest possible value should be 0/59.

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How to reproduce

1. Go to https://freeformatter.com/cron-expression-generator-quartz.html (which uses this plugin).
2. Generate a cron with an increment of 60.
3. Copy/paste the generated cron expression in the input field next to the "Describe expression" button
4. Use the "Describe expression" button.

➡️ You’ll see Quartz fail with the error:

Increment > 60 : 60

Suggested fixes

Fix in cron-core

path: @sbzen/cron-core/ui/utils/get-list.js

• Adjust the logic so that when every = true and the context is Quartz cron, the generated list goes from 1 to 59 instead of 1 to 60. Same with the 1 to 24 range.

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Thank you for your consideration.