# w3c/ServiceWorker

Service Workers

Repository: https://github.com/w3c/ServiceWorker
Canonical: https://ross.abutalabs.com/products/serviceworker
Homepage: https://w3c.github.io/ServiceWorker/
Language: Bikeshed
License: NOASSERTION
License Family: other
Last push: 2026-08-12T16:20:24+00:00

## Health v2 (maintenance only)
Score: 76/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 97, release rhythm 35, longevity 100
- inputs: {"age_days": 4955, "days_push": 21, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3634, forks 324 (observed 2026-08-28T04:08:12.689134+00:00)

## What it is
The W3C Service Workers specification repository, defining event-driven browser scripts that run independently of web pages and enable offline-capable web applications. It contains the living Editor's Draft (Nightly) and the Service Workers 1 spec advancing toward W3C Recommendation, written in Bikeshed.

## Use cases
- understand how service workers enable offline web apps
- look up the fetch event and Cache API semantics
- implement service worker support in a browser engine
- file spec issues or contribute edits to the service worker standard
- learn how service workers replace HTML5 AppCache
- find use cases and examples for service worker features

## When to choose
- you need the authoritative normative definition of the Service Worker API
- you are a browser implementer or spec contributor
- you want to track the latest nightly features or v1 recommendation status

## When to avoid
- you want a ready-to-use JavaScript library or polyfill for service workers
- you need beginner tutorials rather than formal specification text
- you are looking for runnable application code

## Facets
- artifact type: learning-resource
- maturity: active
- function: documentation, developer-tools
- domain: web-development, documentation, apis
- platform: browser
- tags: specification, service-worker, w3c, offline-web-apps, web-standards, bikeshed, web-server

## Member repositories
- w3c/ServiceWorker (main) score 76

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:12.689134+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 2026-08-29T18:31:51.454251+00:00, confidence not recorded.
  - readme: https://github.com/w3c/ServiceWorker (fetched 2026-08-28T04:08:12.689134+00:00, sha d66a4183ec8c)
  - homepage: https://w3c.github.io/ServiceWorker/ (fetched 2026-08-29T09:26:19.163085+00:00, sha 1cbb8fadd8db)
- Data as of 2026-08-30T08:39:29.467469+00:00.