Progressive Web App

www/sw.js

@@ -0,0 +1,25 @@
+var cacheName = 'ytbn-graphing-software-pwa';
+var filesToCache = [
+    './',
+    './index.html',
+    './ytbn_graphing_software.js',
+    './ytbn_graphing_software_bg.wasm',
+];
+
+/* Start the service worker and cache all of the app's content */
+self.addEventListener('install', function (e) {
+    e.waitUntil(
+        caches.open(cacheName).then(function (cache) {
+            return cache.addAll(filesToCache);
+        })
+    );
+});
+
+/* Serve cached content when offline */
+self.addEventListener('fetch', function (e) {
+    e.respondWith(
+        caches.match(e.request).then(function (response) {
+            return response || fetch(e.request);
+        })
+    );
+});