Individual skill

service-worker

0upvotes

Use when auditing repeat-visit performance, adding offline support, or evaluating PWA readiness for a web application.

skills/service-worker/SKILL.md

Read pinned source

Source commit e8d14d049010e2ce25afcd5e8609dfcbbe63e47e

What was checked

Matches the observed repository HEAD: Yes
Scanner rules are current: Yes
Repository scan complete: No
Skill scan complete: Yes
Observed behavior: Network or broad shell
Last checked: Nov 9, 2026

These are observations at the recorded commit, not a guarantee of safety. Review the source before running it.

Install this skill

Choose an agent in your Stack or copy a command below. Commands fetch the pinned commit and copy only this skill directory. Existing destinations are refused. Copying a command does not install anything.

An install command is unavailable: current rules, complete repository and skill scans, an eligible behavior level and a permitted license are required.

Repository context

Repository stars (not skill ratings): 74,681
Repository last updated: Oct 31, 2026
License: MIT

Observed agent integration: No specific integration evidence. Standard SKILL.md installation does not imply verified compatibility.

frontend Repository topic
front-end-development Repository topic
front-end-developer-tool Repository topic
guidelines Repository topic
checklist Repository topic
reference Repository topic
web-development Repository topic
html Repository topic
css Repository topic
javascript Repository topic
engineering Derived category

Files and excerpt

File metadata and permitted, redacted excerpts come from the recorded scan. Source links are pinned to that commit.

Browse files

SKILL.mdcore · 1,913 bytes
references/rule.mddoc · 8,765 bytes

Read excerpt


# Register a service worker for caching and offline support

Service workers act as a programmable network proxy between the browser and the network. They eliminate repeated server round-trips for static assets, cut load times on repeat visits by 50–90 %, and allow the app to function at all on flaky or offline networks — which is critical for users on mobile or low-bandwidth connections.

## Quick Reference

- Register a service worker in your main JavaScript entry point
- Use an install event to pre-cache critical static assets
- Choose a caching strategy (cache-first, network-first, stale-while-revalidate) per resource type
- Implement an activate event to clean up old caches on update

## Check

Check whether a service worker is registered and whether it caches static assets, API responses, or provides an offline fallback.