diff --git a/src/serviceWorkerRegistration.js b/src/serviceWorkerRegistration.js deleted file mode 100644 index a96b00d5..00000000 --- a/src/serviceWorkerRegistration.js +++ /dev/null @@ -1,119 +0,0 @@ -// This optional code is used to register a service worker. -// register() is not called by default. - -// This lets the app load faster on subsequent visits in production, and gives -// it offline capabilities. However, it also means that developers (and users) -// will only see deployed updates on subsequent visits to a page, after all the -// existing tabs open on the page have been closed, since previously cached -// resources are updated in the background. - -// To learn more about the benefits of this model and instructions on how to -// opt-in, read https://cra.link/PWA - -const isLocalhost = Boolean( - window.location.hostname === 'localhost' || - // [::1] is the IPv6 localhost address. - window.location.hostname === '[::1]' || - // 127.0.0.0/8 are considered localhost for IPv4. - window.location.hostname.match(/^127(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/) -); - -export function register(config) { - if ('serviceWorker' in navigator) { - // The URL constructor is available in all browsers that support SW. - const publicUrl = new URL(process.env.PUBLIC_URL, window.location.href); - - if (publicUrl.origin !== window.location.origin) { - return; - } - - window.addEventListener('load', () => { - const swUrl = `${publicUrl}service-worker.js`; - - if (isLocalhost) { - checkValidServiceWorker(swUrl, config); - } else { - // Is not localhost. Just register service worker - registerValidSW(swUrl, config); - } - }); - } -} - -function registerValidSW(swUrl, config) { - navigator.serviceWorker - .register(swUrl) - .then((registration) => { - registration.onupdatefound = () => { - const installingWorker = registration.installing; - if (installingWorker == null) { - return; - } - installingWorker.onstatechange = () => { - if (installingWorker.state === 'installed') { - if (navigator.serviceWorker.controller) { - // At this point, the updated precached content has been fetched, - // but the previous service worker will still serve the older - // content until all client tabs are closed. - - // Execute callback - if (config && config.onUpdate) { - config.onUpdate(registration); - } - } else { - // At this point, everything has been precached. - // It's the perfect time to display a - // "Content is cached for offline use." message. - - // Execute callback - if (config && config.onSuccess) { - config.onSuccess(registration); - } - } - } - }; - }; - }) - .catch((error) => { - console.error('Error during service worker registration:', error); - }); -} - -function checkValidServiceWorker(swUrl, config) { - // Check if the service worker can be found. If it can't reload the page. - fetch(swUrl, { - headers: { 'Service-Worker': 'script' }, - }) - .then((response) => { - // Ensure service worker exists, and that we really are getting a JS file. - const contentType = response.headers.get('content-type'); - if ( - response.status === 404 || - (contentType != null && contentType.indexOf('javascript') === -1) - ) { - // No service worker found. Probably a different app. Reload the page. - navigator.serviceWorker.ready.then((registration) => { - registration.unregister().then(() => { - window.location.reload(); - }); - }); - } else { - // Service worker found. Proceed as normal. - registerValidSW(swUrl, config); - } - }) - .catch(() => { - }); -} - -export function unregister() { - if ('serviceWorker' in navigator) { - navigator.serviceWorker.ready - .then((registration) => { - registration.unregister(); - }) - .catch((error) => { - console.error(error.message); - }); - } -}