Progressive Web Apps with React

Parsing the JSON

Our asset-manifest.json returns, rather surprisingly, some JSON. Let's parse it:

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

Now we have a manifest variable that is a plain JavaScript object matching the content of asset-manifest.json.