kopia lustrzana https://github.com/nolanlawson/pinafore
79 wiersze
2.0 KiB
JavaScript
79 wiersze
2.0 KiB
JavaScript
![]() |
const timestamp = '__timestamp__';
|
||
|
const ASSETS = `cache${timestamp}`;
|
||
|
|
||
|
// `shell` is an array of all the files generated by webpack,
|
||
|
// `assets` is an array of everything in the `assets` directory
|
||
|
const to_cache = __shell__.concat(__assets__);
|
||
|
const cached = new Set(to_cache);
|
||
|
|
||
|
// `routes` is an array of `{ pattern: RegExp }` objects that
|
||
|
// match the pages in your app
|
||
|
const routes = __routes__;
|
||
|
|
||
|
self.addEventListener('install', event => {
|
||
|
event.waitUntil(
|
||
|
caches
|
||
|
.open(ASSETS)
|
||
|
.then(cache => cache.addAll(to_cache))
|
||
|
.then(() => {
|
||
|
self.skipWaiting();
|
||
|
})
|
||
|
);
|
||
|
});
|
||
|
|
||
|
self.addEventListener('activate', event => {
|
||
|
event.waitUntil(
|
||
|
caches.keys().then(async keys => {
|
||
|
// delete old caches
|
||
|
for (const key of keys) {
|
||
|
if (key !== ASSETS) await caches.delete(key);
|
||
|
}
|
||
|
|
||
|
await self.clients.claim();
|
||
|
})
|
||
|
);
|
||
|
});
|
||
|
|
||
|
self.addEventListener('fetch', event => {
|
||
|
const url = new URL(event.request.url);
|
||
|
|
||
|
// don't try to handle e.g. data: URIs
|
||
|
if (!url.protocol.startsWith('http')) return;
|
||
|
|
||
|
// always serve assets and webpack-generated files from cache
|
||
|
if (cached.has(url.pathname)) {
|
||
|
event.respondWith(caches.match(event.request));
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
// for pages, you might want to serve a shell `index.html` file,
|
||
|
// which Sapper has generated for you. It's not right for every
|
||
|
// app, but if it's right for yours then uncomment this section
|
||
|
/*
|
||
|
if (url.origin === self.origin && routes.find(route => route.pattern.test(url.pathname))) {
|
||
|
event.respondWith(caches.match('/index.html'));
|
||
|
return;
|
||
|
}
|
||
|
*/
|
||
|
|
||
|
// for everything else, try the network first, falling back to
|
||
|
// cache if the user is offline. (If the pages never change, you
|
||
|
// might prefer a cache-first approach to a network-first one.)
|
||
|
event.respondWith(
|
||
|
caches
|
||
|
.open(`offline${timestamp}`)
|
||
|
.then(async cache => {
|
||
|
try {
|
||
|
const response = await fetch(event.request);
|
||
|
cache.put(event.request, response.clone());
|
||
|
return response;
|
||
|
} catch(err) {
|
||
|
const response = await cache.match(event.request);
|
||
|
if (response) return response;
|
||
|
|
||
|
throw err;
|
||
|
}
|
||
|
})
|
||
|
);
|
||
|
});
|