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DeskHub-Webseite/sw-staff.js

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+/**
+ * DeskHub Service Worker – Mitarbeiterbereich (scope: /staff/)
+ */
+const CACHE      = 'deskhub-staff-v1';
+const OFFLINE_URL = '/offline.html';
+const PRECACHE   = ['/offline.html', '/assets/css/style.css'];
+
+self.addEventListener('install', e => {
+  e.waitUntil(caches.open(CACHE).then(c => c.addAll(PRECACHE)));
+  self.skipWaiting();
+});
+
+self.addEventListener('activate', e => {
+  e.waitUntil(
+    caches.keys().then(keys =>
+      Promise.all(keys.filter(k => k !== CACHE).map(k => caches.delete(k)))
+    )
+  );
+  self.clients.claim();
+});
+
+self.addEventListener('fetch', e => {
+  if (e.request.method !== 'GET') return;
+
+  if (e.request.url.match(/\.(css|js|woff2?|png|svg|ico|webp)(\?.*)?$/)) {
+    e.respondWith(
+      caches.match(e.request).then(cached =>
+        cached || fetch(e.request).then(resp => {
+          caches.open(CACHE).then(c => c.put(e.request, resp.clone()));
+          return resp;
+        })
+      )
+    );
+    return;
+  }
+
+  e.respondWith(
+    fetch(e.request).catch(() => caches.match(OFFLINE_URL))
+  );
+});