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PWA and Service Worker

Cashlytics registers its service worker only in production.

Registration​

src/components/pwa/service-worker-registrar.tsx registers /sw.js with scope / in production. In development, it unregisters existing service workers and removes Cashlytics caches to avoid stale local behavior.

Cache Strategy​

public/sw.js uses:

  • cache-first for /_next/static/ assets
  • network-first with a 10 second timeout and 5 minute max-age fallback for /api/ GET requests
  • network-first for pages, falling back to /~offline

The offline page is pre-cached during service worker install along with favicon and manifest assets.

Push Events​

The same service worker handles push and notificationclick. Push payloads can include title, body, icon, badge, and url. Notification clicks focus an existing same-origin app window when possible or open a new one.