Small, dependency-light .xlsx read + write for Node and the browser. Worksheets, typed cells, styles, dates, formulas, merged cells — one dependency, no legacy bloat.

Lightweight counter animation library that detects and animates all numbers within any string — including integers, decimals, and comma-formatted values like '1,500,344' or '34.67%'. Supports scroll-triggered or immediate start, repeat on re-entry, custom

Lightweight idle detection for the browser. Fires callbacks and optionally notifies a backend when the user goes inactive. Supports TTL timeouts, tab visibility pausing, activity throttling, and dynamic auth headers. Zero dependencies.

Lightweight localStorage/sessionStorage wrapper with TTL expiry, TypeScript generics, namespace isolation, and version-based auto-wipe. Zero dependencies.

Detect outdated browsers and redirect or block access. Supports feature detection (default), minimum version checks, and live latest-version checks via endoflife.date — use one, two, or all three together.