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Merge pull request #458 from larsl-net/basic-pwa

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Basic PWA support
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Sean Morley 2025-01-26 20:20:47 -05:00 • committed by GitHub
commit 680a2378d9
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1
frontend/src/app.html
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@ -4,6 +4,7 @@
<meta charset="utf-8" />
<link rel="icon" href="%sveltekit.assets%/favicon.png" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<link rel="manifest" crossorigin="use-credentials" href="/manifest.json" />
%sveltekit.head%
</head>
<body data-sveltekit-preload-data="hover">

60
frontend/src/service-worker/indes.ts Normal file
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@ -0,0 +1,60 @@
/// <reference types="@sveltejs/kit" />
import { build, files, version } from '$service-worker';
const CACHE = `cache-${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());
});