48 lines
1.1 KiB
JavaScript
48 lines
1.1 KiB
JavaScript
"use strict";
|
|
|
|
const CACHE_NAME = "offline-cache-v1";
|
|
const OFFLINE_URL = '/offline.html';
|
|
|
|
const filesToCache = [
|
|
OFFLINE_URL
|
|
];
|
|
|
|
self.addEventListener("install", (event) => {
|
|
event.waitUntil(
|
|
caches.open(CACHE_NAME)
|
|
.then((cache) => cache.addAll(filesToCache))
|
|
);
|
|
});
|
|
|
|
self.addEventListener("fetch", (event) => {
|
|
if (event.request.mode === 'navigate') {
|
|
event.respondWith(
|
|
fetch(event.request)
|
|
.catch(() => {
|
|
return caches.match(OFFLINE_URL);
|
|
})
|
|
);
|
|
} else {
|
|
event.respondWith(
|
|
caches.match(event.request)
|
|
.then((response) => {
|
|
return response || fetch(event.request);
|
|
})
|
|
);
|
|
}
|
|
});
|
|
|
|
self.addEventListener('activate', (event) => {
|
|
event.waitUntil(
|
|
caches.keys().then((cacheNames) => {
|
|
return Promise.all(
|
|
cacheNames.map((cacheName) => {
|
|
if (cacheName !== CACHE_NAME) {
|
|
return caches.delete(cacheName);
|
|
}
|
|
})
|
|
);
|
|
})
|
|
);
|
|
});
|