53 lines
1.1 KiB
JavaScript
53 lines
1.1 KiB
JavaScript
/// <reference types="@sveltejs/kit" />
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import { build, files, version } from "$service-worker"
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const CACHE = `cache-${version}`
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const ASSETS = [...build, ...files]
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self.addEventListener("install", (event) => {
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async function addFilesToCache() {
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const cache = await caches.open(CACHE)
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await cache.addAll(ASSETS)
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}
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event.waitUntil(addFilesToCache())
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})
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self.addEventListener("activate", (event) => {
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async function deleteOldCaches() {
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for (const key of await caches.keys()) {
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if (key !== CACHE) await caches.delete(key)
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}
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}
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event.waitUntil(deleteOldCaches())
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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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async function respond() {
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const url = new URL(event.request.url)
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const cache = await caches.open(CACHE)
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if (ASSETS.includes(url.pathname)) {
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return cache.match(event.request)
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}
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try {
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const response = await fetch(event.request)
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if (response.status === 200) {
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cache.put(event.request, response.clone())
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}
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return response
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} catch {
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return cache.match(event.request)
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}
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}
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event.respondWith(respond())
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})
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