1 files changed, 31 insertions, 0 deletions
diff --git a/apps/files/src/services/ServiceWorker.js b/apps/files/src/services/ServiceWorker.js
new file mode 100644
index 00000000000..cc13db44009
--- /dev/null
+++ b/apps/files/src/services/ServiceWorker.js
@@ -0,0 +1,31 @@
+/**
+ * SPDX-FileCopyrightText: 2019 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+import { generateUrl, getRootUrl } from '@nextcloud/router'
+import logger from '../logger.ts'
+
+export default () => {
+	if ('serviceWorker' in navigator) {
+		// Use the window load event to keep the page load performant
+		window.addEventListener('load', async () => {
+			try {
+				const url = generateUrl('/apps/files/preview-service-worker.js', {}, { noRewrite: true })
+				let scope = getRootUrl()
+				// If the instance is not in a subfolder an empty string will be returned.
+				// The service worker registration will use the current path if it receives an empty string,
+				// which will result in a service worker registration for every single path the user visits.
+				if (scope === '') {
+					scope = '/'
+				}
+
+				const registration = await navigator.serviceWorker.register(url, { scope })
+				logger.debug('SW registered: ', { registration })
+			} catch (error) {
+				logger.error('SW registration failed: ', { error })
+			}
+		})
+	} else {
+		logger.debug('Service Worker is not enabled on this browser.')
+	}
+}