What's New

July 2026: performance, types, accessibility, adapters

The biggest release wave since 1.0. Everything below is live on npm.

Recurrence performance, fixed for real (core 2.1.70 → 2.3.0)

Our own published benchmarks showed RRULE expansion up to 1,200x slower than the rrule library. Two releases fixed it:

• 2.1.70 removed a timezone-cache pathology: the offset cache thrashed on multi-year series, rebuilding an Intl.DateTimeFormat for every occurrence. The worst case went from 209ms to under 1ms.
• 2.3.0 added a numeric-iteration fast path: between DST transitions, daily and weekly stepping is pure timestamp arithmetic, with transition instants discovered by binary search and cached. Daily/weekly expansion now runs at roughly 2x of rrule (the benchmark dashboard tracks it publicly), with output verified byte-identical across 1,360 rule/timezone combinations.

TypeScript declarations everywhere (core 2.2.0, interface 1.2.0)

Both packages now ship .d.ts files generated from their JSDoc: typed APIs and autocompletion for TypeScript consumers, with no rewrite of the zero-dependency JavaScript source. Along the way, TimezoneManager and ConflictDetector — documented but previously unreachable — became real exports.

Accessibility (interface 1.1.0)

The month view now implements the WAI-ARIA grid pattern: roving tabindex, arrow-key navigation (with PageUp/PageDown month paging and focus preserved across re-renders), aria-selected/aria-current, and localized per-cell labels with event counts. Events in every view are keyboard-reachable labeled buttons, shell controls are labeled, and navigation is announced via a live region.

Framework adapters (new packages)

• @forcecalendar/react — SSR-safe React wrapper; works in Next.js with no workarounds
• @forcecalendar/vue — SSR-safe Vue 3 wrapper; works in Nuxt out of the box

Runs where others can't

A new examples repository with runnable starters for Cloudflare Workers (server-side scheduling at the edge), Chrome MV3 extensions, SharePoint SPFx, ServiceNow Service Portal, and Atlassian Forge — see the platforms page.