# TalAter/UpUp

✈️ Easily create sites that work offline as well as online

Repository: https://github.com/TalAter/UpUp
Canonical: https://ross.abutalabs.com/products/upup
Homepage: https://www.talater.com/upup/
Language: JavaScript
License: MIT
License Family: permissive
Topics: hacktoberfest, pwa, progressive-web-app, offline, offline-first, service-worker
Last push: 2026-08-03T18:16:11+00:00

## Health v2 (maintenance only)
Score: 66/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 95, release rhythm 8, longevity 100
- inputs: {"age_days": 4193, "days_push": 30, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 4918, forks 260 (observed 2026-08-28T04:09:02.373788+00:00)

## What it is
UpUp is a tiny JavaScript library that uses service workers to let websites serve content to users even when they are offline. With a single command, developers define the content and assets users see when their connection drops.

## Use cases
- make my website work offline
- show fallback content when users lose connection
- add offline-first support to a site with service workers
- build a progressive web app that caches content
- serve cached pages to users on planes or subways

## When to choose
- you want a dead-simple, one-command way to add offline content to a site
- you need a lightweight service worker wrapper without a full PWA framework
- your site is served over HTTPS and targets Chrome, Firefox, or Opera

## When to avoid
- you need fine-grained control over service worker caching strategies
- you require broad browser support including Safari or older browsers
- your site cannot be served over HTTPS

## Facets
- artifact type: library
- maturity: maintenance
- function: caching, web-framework
- domain: web-development, frontend
- platform: browser
- tags: service-worker, offline-first, pwa, progressive-web-app, javascript

## Member repositories
- TalAter/UpUp (main) score 66

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:09:02.373788+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:18:02.450351+00:00, confidence not recorded.
  - readme: https://github.com/TalAter/UpUp (fetched 2026-08-28T04:09:02.373788+00:00, sha fbf932004d13)
  - homepage: https://www.talater.com/upup/ (fetched 2026-08-29T09:00:18.441279+00:00, sha a2a2c989dded)
  - site_page: https://www.talater.com/upup/getting-started-with-offline-first.html (fetched 2026-08-29T09:00:18.450520+00:00, sha 137d02bc9f0b)
  - registry_npm: https://registry.npmjs.org/upup (fetched 2026-08-29T09:00:18.452708+00:00, sha 9bf999ca5704)
- Data as of 2026-08-30T08:39:29.467469+00:00.