Runtime status
- Local version
- Loading
- Remote version
- Checking
- Connectivity
- Online
- Display mode
- Browser tab
- Service worker
- Registering
Open this page once while online, then reload it offline to verify the cached start page and local build info.
Progressive Web App
PWA-ready Sinatra starter
This service can be installed, launched in standalone mode, and reused offline after the first successful visit.
Included PWA basics
- The app exposes server build metadata from the deployed container environment.
- The service worker uses build-keyed caches for the start page, manifest, script, and icons.
- A newer deployed build is detected from `/version.json` and can be applied with the update button.
- Portrait orientation is requested for installed launches.
- Landscape mobile sessions show a blocking rotate-device overlay.
- Viewport zoom is disabled for kiosk-style mobile usage.