86 lines
1.8 KiB
JavaScript
86 lines
1.8 KiB
JavaScript
const CACHE_VERSION = "simple-llm-chat-ui-v2"
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const APP_SHELL_URLS = [
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"/",
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"/manifest.webmanifest",
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"/icons/icon-192.png",
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"/icons/icon-512.png",
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"/icons/maskable-512.png",
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"/icons/apple-touch-icon.png",
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]
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const CACHEABLE_DESTINATIONS = new Set(["font", "image", "script", "style"])
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self.addEventListener("install", (event) => {
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event.waitUntil(
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caches
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.open(CACHE_VERSION)
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.then((cache) => cache.addAll(APP_SHELL_URLS))
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.then(() => self.skipWaiting())
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)
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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 !== CACHE_VERSION)
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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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const { request } = event
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const url = new URL(request.url)
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if (request.method !== "GET" || url.origin !== self.location.origin) {
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return
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}
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if (request.mode === "navigate") {
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event.respondWith(networkFirst(request))
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return
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}
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if (CACHEABLE_DESTINATIONS.has(request.destination)) {
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event.respondWith(cacheFirst(request))
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}
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})
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async function networkFirst(request) {
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const cache = await caches.open(CACHE_VERSION)
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try {
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const response = await fetch(request)
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if (response.ok) {
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await cache.put(request, response.clone())
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}
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return response
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} catch {
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return (await cache.match(request)) ?? (await cache.match("/"))
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}
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}
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async function cacheFirst(request) {
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const cache = await caches.open(CACHE_VERSION)
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const cached = await cache.match(request)
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if (cached) {
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return cached
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}
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const response = await fetch(request)
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if (response.ok) {
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await cache.put(request, response.clone())
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}
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return response
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}
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