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@@ -1,135 +0,0 @@
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-// This optional code is used to register a service worker.
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-// register() is not called by default.
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-
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-// This lets the app load faster on subsequent visits in production, and gives
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-// it offline capabilities. However, it also means that developers (and users)
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-// will only see deployed updates on subsequent visits to a page, after all the
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-// existing tabs open on the page have been closed, since previously cached
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-// resources are updated in the background.
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-
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-// To learn more about the benefits of this model and instructions on how to
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-// opt-in, read http://bit.ly/CRA-PWA
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-
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-const isLocalhost = Boolean(
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- window.location.hostname === 'localhost' ||
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- // [::1] is the IPv6 localhost address.
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- window.location.hostname === '[::1]' ||
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- // 127.0.0.1/8 is considered localhost for IPv4.
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- window.location.hostname.match(
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- /^127(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/
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- )
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-);
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-
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-export function register(config) {
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- if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) {
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- // The URL constructor is available in all browsers that support SW.
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- const publicUrl = new URL(process.env.PUBLIC_URL, window.location.href);
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- if (publicUrl.origin !== window.location.origin) {
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- // Our service worker won't work if PUBLIC_URL is on a different origin
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- // from what our page is served on. This might happen if a CDN is used to
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- // serve assets; see https://github.com/facebook/create-react-app/issues/2374
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- return;
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- }
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-
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- window.addEventListener('load', () => {
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- const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`;
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-
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- if (isLocalhost) {
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- // This is running on localhost. Let's check if a service worker still exists or not.
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- checkValidServiceWorker(swUrl, config);
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-
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- // Add some additional logging to localhost, pointing developers to the
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- // service worker/PWA documentation.
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- navigator.serviceWorker.ready.then(() => {
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- console.log(
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- 'This web app is being served cache-first by a service ' +
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- 'worker. To learn more, visit http://bit.ly/CRA-PWA'
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- );
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- });
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- } else {
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- // Is not localhost. Just register service worker
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- registerValidSW(swUrl, config);
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- }
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- });
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- }
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-}
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-
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-function registerValidSW(swUrl, config) {
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- navigator.serviceWorker
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- .register(swUrl)
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- .then(registration => {
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- registration.onupdatefound = () => {
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- const installingWorker = registration.installing;
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- if (installingWorker == null) {
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- return;
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- }
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- installingWorker.onstatechange = () => {
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- if (installingWorker.state === 'installed') {
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- if (navigator.serviceWorker.controller) {
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- // At this point, the updated precached content has been fetched,
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- // but the previous service worker will still serve the older
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- // content until all client tabs are closed.
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- console.log(
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- 'New content is available and will be used when all ' +
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- 'tabs for this page are closed. See http://bit.ly/CRA-PWA.'
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- );
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-
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- // Execute callback
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- if (config && config.onUpdate) {
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- config.onUpdate(registration);
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- }
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- } else {
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- // At this point, everything has been precached.
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- // It's the perfect time to display a
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- // "Content is cached for offline use." message.
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- console.log('Content is cached for offline use.');
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-
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- // Execute callback
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- if (config && config.onSuccess) {
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- config.onSuccess(registration);
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- }
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- }
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- }
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- };
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- };
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- })
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- .catch(error => {
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- console.error('Error during service worker registration:', error);
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- });
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-}
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-
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-function checkValidServiceWorker(swUrl, config) {
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- // Check if the service worker can be found. If it can't reload the page.
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- fetch(swUrl)
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- .then(response => {
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- // Ensure service worker exists, and that we really are getting a JS file.
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- const contentType = response.headers.get('content-type');
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- if (
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- response.status === 404 ||
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- (contentType != null && contentType.indexOf('javascript') === -1)
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- ) {
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- // No service worker found. Probably a different app. Reload the page.
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- navigator.serviceWorker.ready.then(registration => {
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- registration.unregister().then(() => {
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- window.location.reload();
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- });
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- });
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- } else {
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- // Service worker found. Proceed as normal.
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- registerValidSW(swUrl, config);
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- }
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- })
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- .catch(() => {
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- console.log(
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- 'No internet connection found. App is running in offline mode.'
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- );
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- });
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-}
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-
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-export function unregister() {
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- if ('serviceWorker' in navigator) {
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- navigator.serviceWorker.ready.then(registration => {
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- registration.unregister();
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- });
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- }
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-}
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kulley