// the find
TalAter/UpUp
✈️ Easily create sites that work offline as well as online
UpUp is a service worker wrapper that gives you offline fallback pages with a single function call. You define an offline URL and a list of assets to cache, and it handles the service worker registration and caching strategy for you. It's aimed at developers who want basic offline support without learning the service worker API.
The API is genuinely minimal — one function call, two files, done. Good graceful degradation: browsers without service worker support just ignore it silently. The abstraction is honest about what it does, not overselling; it handles exactly the offline-fallback case and nothing else. HTTPS requirement is clearly called out upfront, which saves you a debugging session.
Dead project — last commit was December 2022, and the service worker ecosystem has moved on considerably since then. Supports only the simplest offline pattern (cache-first static fallback); no network-first, stale-while-revalidate, or background sync, which is what you'd actually want for a real offline-first app. Browser support table still lists Chrome 40 and Firefox 41, which tells you when this was last maintained. Workbox from Google does everything UpUp does and far more, is actively maintained, and has first-party tooling — there's no reason to pick UpUp for a new project.