Add custom sw.ts
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This commit is contained in:
Alessio Davoli 2023-07-19 17:21:13 +02:00
parent bb53698682
commit 84d38c2ef0
2 changed files with 70 additions and 0 deletions

67
frontend/src/sw.ts Normal file
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@ -0,0 +1,67 @@
/// <reference types="@sveltejs/kit" />
/// <reference no-default-lib="true"/>
/// <reference lib="esnext" />
/// <reference lib="webworker" />
import { build, files, version } from '$service-worker';
// Create a unique cache name for this deployment
const CACHE = `sw-cache-${version}`;
const ASSETS = [
...build, // the app itself
...files // everything in `static`
];
self.addEventListener('install', (event) => {
// Create a new cache and add all files to it
async function addFilesToCache() {
const cache = await caches.open(CACHE);
await cache.addAll(ASSETS);
}
event.waitUntil(addFilesToCache());
});
self.addEventListener('activate', (event) => {
// Remove previous cached data from disk
async function deleteOldCaches() {
for (const key of await caches.keys()) {
if (key !== CACHE) await caches.delete(key);
}
}
event.waitUntil(deleteOldCaches());
});
self.addEventListener('fetch', (event) => {
// ignore POST requests etc
if (event.request.method !== 'GET') return;
async function respond() {
const url = new URL(event.request.url);
const cache = await caches.open(CACHE);
// `build`/`files` can always be served from the cache
if (ASSETS.includes(url.pathname)) {
return cache.match(url.pathname);
}
// for everything else, try the network first, but
// fall back to the cache if we're offline
try {
const response = await fetch(event.request);
if (response.status === 200) {
cache.put(event.request, response.clone());
}
return response;
} catch {
return cache.match(event.request);
}
}
event.respondWith(respond());
});

View file

@ -5,6 +5,9 @@ import { vitePreprocess } from '@sveltejs/kit/vite';
const config = {
preprocess: vitePreprocess(),
kit: {
files: {
serviceWorker: 'src/sw.ts',
},
adapter: adapter({
fallback: null,
precompress: true,