Credential Check

PWA · DUMMY DATA
Install this as an app on your device.
● Offline — app shell loaded from cache. Camera scanning still works; nothing needing network will.

Scan a badge

Or enter a code manually

Participant record

Participant photo

Name

—

Year

—

Test QR codes (scan these with your phone)

Point the camera above at any of these codes — off another screen or a printout — to pull the matching record.

Notes

This is a real PWA: it has a manifest and service worker, so a browser will offer to install it to the home screen / app list, it gets its own icon and launches full-screen without browser chrome, and the shell works offline after the first visit.

Hosting requirement: service workers and camera access both require a secure context — HTTPS, or localhost for local testing. Plain file:// won't register the service worker or grant camera access. Any static host (Netlify, GitHub Pages, Vercel, your own server) works.

Swapping in real data: replace the PARTICIPANTS array below with a call to your real backend (REST API, SharePoint, Dataverse, Firebase, whatever you use) inside lookup() — everything else, including install/offline behavior, works unchanged.