RRStack overview

RRStack composes a prioritized stack of time‑based rules (rrule + optional continuous spans) to:

• Answer point queries: isActiveAt(t) — boolean.
• Stream contiguous segments: getSegments(from, to) — half‑open [start, end).
• Classify windows: classifyRange(from, to) — 'active' | 'blackout' | 'partial'.
• Compute effective bounds with open‑sided detection: getEffectiveBounds().

Key traits

• Timezone/DST correctness — all coverage computed in the rule’s IANA time zone; duration arithmetic via Luxon.
• Half‑open intervals — in 's' mode, end times round up to avoid boundary false negatives.
• JSON persistence — toJson() and new RRStack(json) round‑trip your stack; update(partial, policy) handles version and time‑unit changes with notices.
• Pure library surface — no I/O side effects; works in Node, browsers, and workers.

If you’re new, continue with Getting started. To browse the callable surface and types, see Core API and Types.