/
sw.js
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/
sw.js
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const staticCacheName = 'site-static-v1';
const dynamicCacheName = 'site-dynamic-v1';
const assets = [
'/',
'/index.html',
'/js/app.js',
'/js/db.js',
'/js/ui.js',
'/scripts/auth.js',
'/scripts/index.js',
'/js/materialize.min.js',
'/css/styles.css',
'/css/materialize.min.css',
'/favicon.ico',
'https://fonts.googleapis.com/icon?family=Material+Icons',
'https://fonts.gstatic.com/s/materialicons/v47/flUhRq6tzZclQEJ-Vdg-IuiaDsNcIhQ8tQ.woff2'
];
// cache size limit function
const limitCacheSize = (name, size) => {
caches.open(name).then(cache => {
cache.keys().then(keys => {
if (keys.length > size) {
cache.delete(keys[0]).then(limitCacheSize(name, size));
}
});
});
};
// install event
self.addEventListener('install', evt => {
//console.log('service worker installed');
evt.waitUntil(
caches.open(staticCacheName).then((cache) => {
console.log('caching shell assets');
cache.addAll(assets);
})
);
});
// activate event
self.addEventListener('activate', evt => {
//console.log('service worker activated');
evt.waitUntil(
caches.keys().then(keys => {
//console.log(keys);
return Promise.all(keys
.filter(key => key !== staticCacheName && key !== dynamicCacheName)
.map(key => caches.delete(key))
);
})
);
});
// fetch event
self.addEventListener('fetch', evt => {
// console.log('fetch event', evt);
// evt.respondWith(
// caches.match(evt.request).then(cacheRes => {
// return cacheRes || fetch(evt.request).then(fetchRes => {
// return caches.open(dynamicCacheName).then(cache => {
// cache.put(evt.request.url, fetchRes.clone());
// // check cached items size
// limitCacheSize(dynamicCacheName, 15);
// return fetchRes;
// })
// });
// }).catch(() => {
// if (evt.request.url.indexOf('.html') > -1) {
// return caches.match('/pages/fallback.html');
// }
// })
// );
});