80 lines
2.3 KiB
JavaScript
80 lines
2.3 KiB
JavaScript
const CACHE_PREFIX = "helper-tools-shell-";
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const CACHE_NAME = `${CACHE_PREFIX}0.2.0`;
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const CORE = ["./", "./manifest.webmanifest", "./favicon.svg"];
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self.addEventListener("install", (event) => {
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event.waitUntil(
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caches.open(CACHE_NAME).then(async (cache) => {
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await cache.addAll(CORE);
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const response = await fetch("./");
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const html = await response.text();
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const assets = [...html.matchAll(/(?:src|href)="(\.\/assets\/[^"]+)"/g)]
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.map((match) => match[1])
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.filter(Boolean);
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await cache.addAll(assets);
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}),
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);
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self.skipWaiting();
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});
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self.addEventListener("activate", (event) => {
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event.waitUntil(
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caches
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.keys()
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.then((keys) =>
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Promise.all(
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keys
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.filter((key) => key.startsWith(CACHE_PREFIX) && key !== CACHE_NAME)
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.map((key) => caches.delete(key)),
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),
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)
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.then(() => self.clients.claim()),
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);
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});
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self.addEventListener("fetch", (event) => {
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if (event.request.method !== "GET") return;
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const url = new URL(event.request.url);
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if (url.origin !== self.location.origin) return;
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const scope = new URL(self.registration.scope);
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if (!url.pathname.startsWith(scope.pathname)) return;
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if (event.request.mode === "navigate") {
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event.respondWith(
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fetch(event.request)
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.then((response) => {
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if (response.ok) {
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const copy = response.clone();
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void caches
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.open(CACHE_NAME)
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.then((cache) => cache.put(event.request, copy));
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}
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return response;
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})
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.catch(async () => {
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const cached = await caches.match(event.request);
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if (cached) return cached;
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const shellUrl = new URL("./", self.registration.scope).href;
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return (await caches.match(shellUrl)) ?? Response.error();
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}),
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);
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return;
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}
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event.respondWith(
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caches.match(event.request).then(
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(cached) =>
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cached ??
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fetch(event.request).then((response) => {
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if (response.ok) {
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const copy = response.clone();
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void caches
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.open(CACHE_NAME)
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.then((cache) => cache.put(event.request, copy));
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}
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return response;
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}),
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),
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);
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});
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