forked from mirror/pixelfed
46 lines
1.1 KiB
JavaScript
46 lines
1.1 KiB
JavaScript
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const OFFLINE_VERSION = 1;
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const CACHE_NAME = "offline";
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const OFFLINE_URL = "/offline.html";
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self.addEventListener("install", (event) => {
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event.waitUntil(
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(async () => {
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const cache = await caches.open(CACHE_NAME);
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await cache.add(new Request(OFFLINE_URL, { cache: "reload" }));
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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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(async () => {
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if ("navigationPreload" in self.registration) {
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await self.registration.navigationPreload.enable();
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}
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})()
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);
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self.clients.claim();
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});
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self.addEventListener("fetch", (event) => {
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if (event.request.mode === "navigate") {
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event.respondWith(
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(async () => {
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try {
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const preloadResponse = await event.preloadResponse;
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if (preloadResponse) {
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return preloadResponse;
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}
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const networkResponse = await fetch(event.request);
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return networkResponse;
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} catch (error) {
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const cache = await caches.open(CACHE_NAME);
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const cachedResponse = await cache.match(OFFLINE_URL);
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return cachedResponse;
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}
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})()
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);
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}
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});
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