121 lines
3.1 KiB
JavaScript
121 lines
3.1 KiB
JavaScript
let CACHE_STATIC_NAME = "static-v3";
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let CACHE_DYNAMIC_NAME = "dynamic-v3";
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self.addEventListener("install", function (event) {
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console.log("[SW install]", event);
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self.skipWaiting();
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event.waitUntil(
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caches.open(CACHE_STATIC_NAME).then((cache) => {
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console.log("[SW precache]");
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return cache.addAll([
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"/",
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"/index.html",
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"/offline.html",
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"/help/index.html",
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"/js/app.js",
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]);
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}),
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);
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});
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self.addEventListener("activate", function (event) {
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console.log("[SW activate]", event);
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event.waitUntil(
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caches.keys().then((keys) => {
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console.log("removing the old cache");
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return Promise.all(
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keys.map((key) => {
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if (key !== CACHE_STATIC_NAME) {
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return caches.delete(key);
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}
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}),
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);
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}),
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);
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return self.clients.claim();
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});
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// self.addEventListener("fetch", function (event) {
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// event.respondWith(
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// caches.match(event.request).then((res) => {
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// console.log("res", res);
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// if (res) {
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// return res;
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// } else {
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// return fetch(event.request.url)
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// .then((res) => {
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// return caches.open(CACHE_DYNAMIC_NAME).then((cache) => {
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// cache.put(event.request.url, res.clone());
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// return res;
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// });
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// })
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// .catch(() => {
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// return caches.open(CACHE_STATIC_NAME).then((cache) => {
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// return cache.match("/offline.html");
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// });
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// });
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// }
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// }),
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// );
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// });
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// Strategy: cache with network fallback
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// self.addEventListener("fetch", (event) => {
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// event.respondWith(
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// caches.open(CACHE_STATIC_NAME).then((cache) => {
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// return cache.match(event.request).then((res) => {
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// return res || fetch(event.request);
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// });
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// }),
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// );
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// });
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// Strategy: cache only
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// self.addEventListener("fetch", (event) => {
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// event.respondWith(caches.match(event.request));
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// });
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// Strategy: network only
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// does not make sense to use an interceptor in this case at all
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// so there is no need of any request listener
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// browser ignores this because we are not intercepting
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// self.addEventListener("fetch", (event) => {
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// return fetch(event.request);
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// });
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// // same result at end but intercepting with SW
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// self.addEventListener("fetch", (event) => {
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// event.respondWith(fetch(event.request));
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// });
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// Strategy: network with cache fallback
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// self.addEventListener("fetch", (event) => {
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// event.respondWith(
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// fetch(event.request).catch(() => {
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// return caches.open(CACHE_STATIC_NAME).then((cache) => {
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// return cache.match(event.request);
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// });
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// }),
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// );
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// });
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// Startegy: cache then network
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self.addEventListener("fetch", (event) => {
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event.respondWith(
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caches.match(event.request).then((cache) => {
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const fetchPromise = fetch(event.request).then((res) => {
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return caches.open(CACHE_STATIC_NAME).then((cache) => {
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cache.put(event.request, res.clone());
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return res;
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});
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});
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return cache || fetchPromise;
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}),
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);
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});
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