workbox-caching-examples

/**
 * Caches all requests ending in .html
 * Handle those requests using a network-first strategy.
 */
workboxSW.router.registerRoute(
    /\.html$/,
    workboxSW.strategies.networkFirst( [] )
);

/* The setup cache has a maximum size of 20 images,
* and once that's reached, the least-recently used entry will be deleted.
* Additionally, any entries older than 1 week will be deleted. */
workboxSW.router.registerRoute(
    '/images/(.*)',
    workboxSW.strategies.cacheFirst({
        cacheName: 'images',
        cacheExpiration: {
            maxEntries: 20,
            maxAgeSeconds: 7 * 24 * 60 * 60,
        },
        cacheableResponse: {statuses: [0, 200]},
    })
);