Lee Salminen
d0ba5c6f30
- modify webmanifest to use LNBITS_SITE_TITLE and LNBITS_CUSTOM_LOGO env vars - modify webmanifest to have a more accurate description, start_url and set theme_color to match default lnbits theme - add service worker to cache requests (chrome requires a registered service worker to activate some pwa functionality) - move webmanifest to <head> (chrome acts weird with it in the body)
71 lines
1.9 KiB
JavaScript
71 lines
1.9 KiB
JavaScript
// the cache version gets updated every time there is a new deployment
|
|
const CACHE_VERSION = 1;
|
|
const CURRENT_CACHE = `lnbits-${CACHE_VERSION}`;
|
|
|
|
// these are the routes we are going to cache for offline support
|
|
const cacheFiles = [
|
|
'/core/static/js/wallet.js',
|
|
'/core/static/js/extensions.js',
|
|
];
|
|
|
|
// on activation we clean up the previously registered service workers
|
|
self.addEventListener('activate', evt =>
|
|
evt.waitUntil(
|
|
caches.keys().then(cacheNames => {
|
|
return Promise.all(
|
|
cacheNames.map(cacheName => {
|
|
if (cacheName !== CURRENT_CACHE) {
|
|
return caches.delete(cacheName);
|
|
}
|
|
})
|
|
);
|
|
})
|
|
)
|
|
);
|
|
|
|
// on install we download the routes we want to cache for offline
|
|
self.addEventListener('install', evt =>
|
|
evt.waitUntil(
|
|
caches.open(CURRENT_CACHE).then(cache => {
|
|
return cache.addAll(cacheFiles);
|
|
})
|
|
)
|
|
);
|
|
|
|
// fetch the resource from the network
|
|
const fromNetwork = (request, timeout) =>
|
|
new Promise((fulfill, reject) => {
|
|
const timeoutId = setTimeout(reject, timeout);
|
|
fetch(request).then(response => {
|
|
clearTimeout(timeoutId);
|
|
fulfill(response);
|
|
update(request);
|
|
}, reject);
|
|
});
|
|
|
|
// fetch the resource from the browser cache
|
|
const fromCache = request =>
|
|
caches
|
|
.open(CURRENT_CACHE)
|
|
.then(cache =>
|
|
cache
|
|
.match(request)
|
|
.then(matching => matching || cache.match('/offline/'))
|
|
);
|
|
|
|
// cache the current page to make it available for offline
|
|
const update = request =>
|
|
caches
|
|
.open(CURRENT_CACHE)
|
|
.then(cache =>
|
|
fetch(request).then(response => cache.put(request, response))
|
|
);
|
|
|
|
// general strategy when making a request (eg if online try to fetch it
|
|
// from the network with a timeout, if something fails serve from cache)
|
|
self.addEventListener('fetch', evt => {
|
|
evt.respondWith(
|
|
fromNetwork(evt.request, 10000).catch(() => fromCache(evt.request))
|
|
);
|
|
evt.waitUntil(update(evt.request));
|
|
}); |