\n \n );\n }\n}\n\nexport default App;\n","// In production, we register a service worker to serve assets from local cache.\n\n// This lets the app load faster on subsequent visits in production, and gives\n// it offline capabilities. However, it also means that developers (and users)\n// will only see deployed updates on the \"N+1\" visit to a page, since previously\n// cached resources are updated in the background.\n\n// To learn more about the benefits of this model, read https://goo.gl/KwvDNy.\n// This link also includes instructions on opting out of this behavior.\n\nconst isLocalhost = Boolean(\n window.location.hostname === 'localhost' ||\n // [::1] is the IPv6 localhost address.\n window.location.hostname === '[::1]' ||\n // 127.0.0.1/8 is considered localhost for IPv4.\n window.location.hostname.match(\n /^127(?:\\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/\n )\n);\n\nexport default function register() {\n if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) {\n // The URL constructor is available in all browsers that support SW.\n const publicUrl = new URL(process.env.PUBLIC_URL, window.location);\n if (publicUrl.origin !== window.location.origin) {\n // Our service worker won't work if PUBLIC_URL is on a different origin\n // from what our page is served on. This might happen if a CDN is used to\n // serve assets; see https://github.com/facebookincubator/create-react-app/issues/2374\n return;\n }\n\n window.addEventListener('load', () => {\n const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`;\n\n if (isLocalhost) {\n // This is running on localhost. Lets check if a service worker still exists or not.\n checkValidServiceWorker(swUrl);\n\n // Add some additional logging to localhost, pointing developers to the\n // service worker/PWA documentation.\n navigator.serviceWorker.ready.then(() => {\n console.log(\n 'This web app is being served cache-first by a service ' +\n 'worker. To learn more, visit https://goo.gl/SC7cgQ'\n );\n });\n } else {\n // Is not local host. Just register service worker\n registerValidSW(swUrl);\n }\n });\n }\n}\n\nfunction registerValidSW(swUrl) {\n navigator.serviceWorker\n .register(swUrl)\n .then(registration => {\n registration.onupdatefound = () => {\n const installingWorker = registration.installing;\n installingWorker.onstatechange = () => {\n if (installingWorker.state === 'installed') {\n if (navigator.serviceWorker.controller) {\n // At this point, the old content will have been purged and\n // the fresh content will have been added to the cache.\n // It's the perfect time to display a \"New content is\n // available; please refresh.\" message in your web app.\n console.log('New content is available; please refresh.');\n } else {\n // At this point, everything has been precached.\n // It's the perfect time to display a\n // \"Content is cached for offline use.\" message.\n console.log('Content is cached for offline use.');\n }\n }\n };\n };\n })\n .catch(error => {\n console.error('Error during service worker registration:', error);\n });\n}\n\nfunction checkValidServiceWorker(swUrl) {\n // Check if the service worker can be found. If it can't reload the page.\n fetch(swUrl)\n .then(response => {\n // Ensure service worker exists, and that we really are getting a JS file.\n if (\n response.status === 404 ||\n response.headers.get('content-type').indexOf('javascript') === -1\n ) {\n // No service worker found. Probably a different app. Reload the page.\n navigator.serviceWorker.ready.then(registration => {\n registration.unregister().then(() => {\n window.location.reload();\n });\n });\n } else {\n // Service worker found. Proceed as normal.\n registerValidSW(swUrl);\n }\n })\n .catch(() => {\n console.log(\n 'No internet connection found. App is running in offline mode.'\n );\n });\n}\n\nexport function unregister() {\n if ('serviceWorker' in navigator) {\n navigator.serviceWorker.ready.then(registration => {\n registration.unregister();\n });\n }\n}\n","import React from 'react';\nimport ReactDOM from 'react-dom';\nimport 'bootstrap/dist/css/bootstrap.min.css';\nimport './index.css';\nimport App from './App';\nimport registerServiceWorker from './registerServiceWorker';\n\nReactDOM.render(, document.getElementById('root'));\nregisterServiceWorker();\n"],"sourceRoot":""}