v1.0 with SW PWA enabled

frontend/node_modules/workbox-precaching/cleanupOutdatedCaches.js

@@ -0,0 +1,32 @@
+/*
+  Copyright 2019 Google LLC
+
+  Use of this source code is governed by an MIT-style
+  license that can be found in the LICENSE file or at
+  https://opensource.org/licenses/MIT.
+*/
+import { cacheNames } from 'workbox-core/_private/cacheNames.js';
+import { logger } from 'workbox-core/_private/logger.js';
+import { deleteOutdatedCaches } from './utils/deleteOutdatedCaches.js';
+import './_version.js';
+/**
+ * Adds an `activate` event listener which will clean up incompatible
+ * precaches that were created by older versions of Workbox.
+ *
+ * @memberof workbox-precaching
+ */
+function cleanupOutdatedCaches() {
+    // See https://github.com/Microsoft/TypeScript/issues/28357#issuecomment-436484705
+    self.addEventListener('activate', ((event) => {
+        const cacheName = cacheNames.getPrecacheName();
+        event.waitUntil(deleteOutdatedCaches(cacheName).then((cachesDeleted) => {
+            if (process.env.NODE_ENV !== 'production') {
+                if (cachesDeleted.length > 0) {
+                    logger.log(`The following out-of-date precaches were cleaned up ` +
+                        `automatically:`, cachesDeleted);
+                }
+            }
+        }));
+    }));
+}
+export { cleanupOutdatedCaches };