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const CACHE_PREFIX = 'dartboat-'
const CACHE_VERSION = '9';
const CACHE_NAME = `${CACHE_PREFIX}${CACHE_VERSION}`;
const CACHE_FILES = [
'./',
'style.css',
'dartboat.js',
'dartboat_wasm.js',
'dartboat_wasm.wasm',
'fonts/Lato-Regular.woff2',
'fonts/Lato-Bold.woff2',
'fonts/SourceSerif4-Regular.ttf.woff2',
'fonts/SourceSerif4-It.ttf.woff2',
'fonts/SourceSerif4-Bold.ttf.woff2',
'fonts/Inter-num.woff2',
'fonts/bootstrap-icons-sub.woff2'
]
function swlog(str) {
console.log(`[service worker] ${str}`);
}
self.addEventListener('install', e => {
swlog('installing');
e.waitUntil((async () => {
swlog(`initialising cache ${CACHE_NAME}`);
const cache = await caches.open(CACHE_NAME);
await cache.addAll(CACHE_FILES);
})());
});
self.addEventListener('activate', e => {
e.waitUntil(caches.keys().then(keys => {
return Promise.all(keys.map(k => {
if (k === CACHE_NAME || !k.startsWith(CACHE_PREFIX))
return;
swlog(`deleting cache ${k}`);
return caches.delete(k);
}));
}));
});
self.addEventListener('fetch', e => {
e.respondWith((async () => {
const cache = await caches.open(CACHE_NAME);
const cached = await cache.match(e.request);
swlog(`${cached ? 'hit' : 'miss'} ${e.request.url}`);
if (cached)
return cached;
const resp = await fetch(e.request);
if (!resp.ok) {
swlog(`ignore status:${resp.status} ${e.request.url}`);
} else {
swlog(`put ${e.request.url}`);
cache.put(e.request, resp.clone());
}
return resp;
})());
});
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