rrule
https://github.com/jkbrzt/rrule
TypeScript
JavaScript library for working with recurrence rules for calendar dates as defined in the iCalendar RFC and more.
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- Issues
- `isFullyConvertibleToText()` returns `true` as soon as it reaches `freq` (or `dtstart` / `tzid` / `wkst`), so the rest of the rule is never checked
- Reject out-of-range recurrence option values
- Out-of-range BYxxx values are silently normalized or dropped instead of rejected (BYHOUR=25, BYMINUTE=60, BYSECOND=61, BYMONTH=13, BYMONTHDAY=32)
- Incorrect seconds with FREQ=SECONDLY;INTERVAL=7;BYMINUTE=0
- Preserve subdaily interval alignment across time filters
- Preserve recurrence counts with repeated clock selectors
- fix: preserve NLP until calendar dates
- Repeated BYSECOND values consume COUNT before deduplication in an RRuleSet
- Invalidate RRuleSet cache when rules or dates change
- Fix duplicate occurrences from coinciding BYSETPOS positions
- Docs
- TypeScript not yet supported