sw.js

workbox.routing.registerRoute(
  new RegExp('/things$'),
  new workbox.strategies.StaleWhileRevalidate({
    cacheName: 'api-things',
    plugins: [
      new workbox.broadcastUpdate.Plugin({
        channelName: 'api-updates',
        headersToCheck: ['x-checksum'], // Or other headers
      }),
      new workbox.expiration.Plugin({
        maxEntries: 50,
        maxAgeSeconds: 30 * 24 * 60 * 60,
        purgeOnQuotaError: true
      }),
    ],
  })
);