add service worker

1 files changed, 18 insertions, 0 deletions

diff --git a/static/pwabuilder-sw.js b/static/pwabuilder-sw.js
new file mode 100644
index 0000000..860da8c
--- /dev/null
+++ b/static/pwabuilder-sw.js
@@ -0,0 +1,18 @@
+// This is the "Offline copy of pages" service worker
+
+const CACHE = "pwabuilder-offline";
+
+importScripts('https://storage.googleapis.com/workbox-cdn/releases/5.1.2/workbox-sw.js');
+
+self.addEventListener("message", (event) => {
+  if (event.data && event.data.type === "SKIP_WAITING") {
+    self.skipWaiting();
+  }
+});
+
+workbox.routing.registerRoute(
+  new RegExp('/*'),
+  new workbox.strategies.StaleWhileRevalidate({
+    cacheName: CACHE
+  })
+);
\ No newline at end of file