const versionMain = '1.0.0.'+new Date().getUTCDate();    const CACHE_NAME = 'deccanchronicle-pwa-v0-'+versionMain;    const CACHE_FILES = ['/','/offline'];    const CACHE_HOSTS = ['www.deccanchronicle.com','deccanchronicle.com','localhost'];    self.addEventListener('install', function(event) {    event.waitUntil(    caches.open(CACHE_NAME).then(function(cache) {    return cache.addAll(CACHE_FILES);    })    );    });    self.addEventListener('activate', function(e) {    e.waitUntil(    Promise.all([    self.clients.claim(),    caches.keys().then(function(cacheNames) {    return Promise.all(    cacheNames.map(function(cacheName) {    if (cacheName !== CACHE_NAME) {    return caches.delete(cacheName);    }    })    );    })    ])    );    });    self.addEventListener('fetch', (event) => {    if (event.request.mode === 'navigate') {    event.respondWith((async () => {    try {    const preloadResponse = await event.preloadResponse;    if (preloadResponse) {    return preloadResponse;    }    const networkResponse = await fetch(event.request);    return networkResponse;    } catch (error) {    const cache = await caches.open(CACHE_NAME);    const cachedResponse = await cache.match('/offline');    return cachedResponse;    }    })());    }    });      var izCacheVer = "1"; importScripts("https://cdn.izooto.com/scripts/workers/93088913323d2cdf7d4bcadc73a1eed82b7391af.js");