Experimental PWA support (#13)

1 files changed, 47 insertions, 0 deletions

diff --git a/public/service-worker.js b/public/service-worker.js
new file mode 100644
index 0000000..2b5c556
--- /dev/null
+++ b/public/service-worker.js
@@ -0,0 +1,47 @@
+const CACHE_NAME = 'static-cache-v10';
+const FILES_TO_CACHE = [
+  '/offline.html',
+  '/static/v10/css/materialize.min.css',
+  '/static/v10/css/material-icons.css',
+  '/static/v10/css/local.css',
+  '/static/v10/js/jquery-2.2.4.min.js',
+  '/static/v10/js/materialize.min.js',
+  '/static/v10/js/travelynx-actions.min.js',
+];
+
+self.addEventListener('install', (evt) => {
+  evt.waitUntil(
+    caches.open(CACHE_NAME).then((cache) => {
+      return cache.addAll(FILES_TO_CACHE);
+    })
+  );
+  self.skipWaiting();
+});
+
+self.addEventListener('activate', (evt) => {
+  evt.waitUntil(
+    caches.keys().then((keyList) => {
+      return Promise.all(keyList.map((key) => {
+        if (key !== CACHE_NAME) {
+          return caches.delete(key);
+        }
+      }));
+    })
+  );
+  self.clients.claim();
+});
+
+self.addEventListener('fetch', (evt) => {
+  if (evt.request.mode !== 'navigate') {
+    return;
+  }
+  evt.respondWith(
+    fetch(evt.request)
+        .catch(() => {
+          return caches.open(CACHE_NAME)
+              .then((cache) => {
+                return cache.match('offline.html');
+              });
+        })
+  );
+});