first commit

web/worker.js

@@ -0,0 +1,29 @@
+
+self.addEventListener('activate', (e) => {
+    self.clients.claim();
+});
+
+self.addEventListener('fetch', (e) => {
+    const reqUrl = e.request.url;
+    e.respondWith((async() => {
+        // Open asset cache and see if this request is in it
+        const cache = await caches.open('main');
+        const match = await caches.match(e.request);
+        // Request the resource from the network
+        const netRes = fetch(e.request).then((res) => {
+            // If the request was successful and this isn't an API call,
+            // update the cached resource
+            if (res.ok && !reqUrl.match(/\/api\/sftp\/.*$/)) {
+                cache.put(e.request, res.clone());
+            }
+            // Return the response
+            return res;
+        }).catch(e => {
+            console.error(e);
+            return match;
+        });
+        // Return the cached resource if it exists
+        // Otherwise, return the network request
+        return match || netRes;
+    })());
+});