{ "name": "", "short_name": "", "icons": [ { "src": "android-chrome-192x192.png", "sizes": "192x192", "type": "image/png" }, { "src": "android-chrome-384x384.png", "sizes": "384x384", "type": "image/png" } ], "theme_color": "#ffffff", "background_color": "#ffffff", "display": "standalone" } ; ; // Service Worker registration if ('serviceWorker' in navigator) { navigator.serviceWorker.register('/sw.js').catch(function(error) { console.log('ServiceWorker registration failed: ', error); }); }