Progressive Web Apps with React

Fetching the asset manifest

Fetching the asset manifest sounds exactly like it sounds:

self.addEventListener('install', event => { event.waitUntil(   caches.open(CACHE_NAME)     .then(cache => {       fetch('asset-manifest.json')         .then(response => {           if (response.ok) {                      }         })     }); );});

Note that we should have no asset-manifest in development; we need to ensure that the request response is okay before proceeding, lest we throw an error.