first commit

web/sw.js

@@ -0,0 +1,10 @@
+const CACHE = 'gree-controller-v5';
+const ASSETS = ['/', '/styles.css', '/app.js', '/favicon.svg', '/manifest.webmanifest', '/lang/index.json', '/lang/en.json'];
+self.addEventListener('install', event => event.waitUntil(caches.open(CACHE).then(cache => cache.addAll(ASSETS)).then(() => self.skipWaiting())));
+self.addEventListener('activate', event => event.waitUntil(caches.keys().then(keys => Promise.all(keys.filter(key => key !== CACHE).map(key => caches.delete(key)))).then(() => self.clients.claim())));
+self.addEventListener('fetch', event => {
+  if (event.request.method !== 'GET' || new URL(event.request.url).pathname.startsWith('/api/')) return;
+  event.respondWith(fetch(event.request).then(response => {
+    const copy = response.clone(); caches.open(CACHE).then(cache => cache.put(event.request, copy)); return response;
+  }).catch(() => caches.match(event.request).then(response => response || caches.match('/'))));
+});