https://www.true-gaming.net/home/sw.js

1/**
2 * TrueGaming service worker.
3 *
4 * Deliberately conservative: this is a news site, so pages are always fetched
5 * from the network and never served stale. The worker exists to
6 *   1. satisfy the PWA install criteria (a fetch handler in the site's scope)
7 *   2. cache the icon/font/static assets that never change per request
8 *   3. show a friendly offline page instead of the browser error
9 *
10 * It does not interfere with OneSignal's worker, which registers under its own
11 * plugin scope.
12 *
13 * Added 2026-08-12.
14 */
15'use strict';
16
17const VERSION = 'tg-v1';
18const STATIC_CACHE = `${VERSION}-static`;
19const OFFLINE_URL = '/home/offline.html';
20
21const PRECACHE = [
22    OFFLINE_URL,
23    '/home/wp-content/themes/TrueGaming25/style/img/app-icons/any/icon-192.png',
24];
25
26self.addEventListener('install', event => {
27    event.waitUntil(
28        caches.open(STATIC_CACHE)
29            .then(cache => cache.addAll(PRECACHE))
30            .then(() => self.skipWaiting())
31            .catch(() => self.skipWaiting())
32    );
33});
34
35self.addEventListener('activate', event => {
36    event.waitUntil(
37        caches.keys()
38            .then(keys => Promise.all(
39                keys.filter(k => !k.startsWith(VERSION)).map(k => caches.delete(k))
40            ))
41            .then(() => self.clients.claim())
42    );
43});
44
45self.addEventListener('fetch', event => {
46    const req = event.request;
47
48    // Only handle same-origin GETs. Anything else (POST, admin, cross-origin,
49    // analytics) goes straight to the network untouched.
50    if (req.method !== 'GET' || new URL(req.url).origin !== self.location.origin) {
51        return;
52    }
53    if (req.url.includes('/wp-admin') || req.url.includes('/wp-login')) {
54        return;
55    }
56
57    // Static assets: serve from cache, refresh in the background.
58    if (/\.(png|jpe?g|gif|webp|svg|ico|woff2?|css|js)$/i.test(new URL(req.url).pathname)) {
59        event.respondWith(
60            caches.match(req).then(hit => {
61                const network = fetch(req).then(res => {
62                    if (res && res.status === 200) {
63                        const copy = res.clone();
64                        caches.open(STATIC_CACHE).then(c => c.put(req, copy));
65                    }
66                    return res;
67                }).catch(() => hit);
68                return hit || network;
69            })
70        );
71        return;
72    }
73
74    // Pages: always network. Fall back to the offline page only on failure.
75    if (req.mode === 'navigate') {
76        event.respondWith(
77            fetch(req).catch(() => caches.match(OFFLINE_URL))
78        );
79    }
80});