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'use strict';
let preCache = [
'./',
'./main.js',
'./favicon-512x512.png',
'./manifest.json',
'https://fonts.googleapis.com/icon?family=Material+Icons',
'https://fonts.gstatic.com/s/materialicons/v47/flUhRq6tzZclQEJ-Vdg-IuiaDsNc.woff2',
];
const CACHE = 'cache-v6';
self.addEventListener('install', function (evt) {
self.skipWaiting();
evt.waitUntil(caches.open(CACHE).then(function (cache) {
cache.addAll(preCache);
}));
});
self.addEventListener('fetch', function (evt) {
evt.respondWith(fromCache(evt.request).then(function (match) {
if (match) {
return match;
} else {
return fetch(evt.request);
}
}));
});
self.addEventListener('activate', function (event) {
event.waitUntil(clients.claim());
event.waitUntil(clients.claim().then(function () {
return caches.keys().then(function (cacheNames) {
return Promise.all(cacheNames.filter(c => c !== CACHE).map(c => caches.delete(c)));
});
}));
});
function fromCache (request) {
return caches.open(CACHE).then(function (cache) {
return cache.match(request);
});
}