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- "use strict";
- Object.defineProperty(exports, "__esModule", {
- value: true
- });
- exports.register = register;
- exports.unregister = unregister;
- // 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 http://bit.ly/CRA-PWA
- var isLocalhost = Boolean(window.location.hostname === 'localhost' || // [::1] is the IPv6 localhost address.
- window.location.hostname === '[::1]' || // 127.0.0.1/8 is considered localhost for IPv4.
- window.location.hostname.match(/^127(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/));
- function register(config) {
- if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) {
- // The URL constructor is available in all browsers that support SW.
- var publicUrl = new URL(process.env.PUBLIC_URL, window.location.href);
- if (publicUrl.origin !== window.location.origin) {
- // Our service worker won't work if PUBLIC_URL is on a different origin
- // from what our page is served on. This might happen if a CDN is used to
- // serve assets; see https://github.com/facebook/create-react-app/issues/2374
- return;
- }
- window.addEventListener('load', function () {
- var swUrl = "".concat(process.env.PUBLIC_URL, "/service-worker.js");
- if (isLocalhost) {
- // This is running on localhost. Let's check if a service worker still exists or not.
- checkValidServiceWorker(swUrl, config); // Add some additional logging to localhost, pointing developers to the
- // service worker/PWA documentation.
- navigator.serviceWorker.ready.then(function () {
- console.log('This web app is being served cache-first by a service ' + 'worker. To learn more, visit http://bit.ly/CRA-PWA');
- });
- } else {
- // Is not localhost. Just register service worker
- registerValidSW(swUrl, config);
- }
- });
- }
- }
- function registerValidSW(swUrl, config) {
- navigator.serviceWorker.register(swUrl).then(function (registration) {
- registration.onupdatefound = function () {
- var installingWorker = registration.installing;
- if (installingWorker == null) {
- return;
- }
- installingWorker.onstatechange = function () {
- 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.
- console.log('New content is available and will be used when all ' + 'tabs for this page are closed. See http://bit.ly/CRA-PWA.'); // 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.
- console.log('Content is cached for offline use.'); // Execute callback
- if (config && config.onSuccess) {
- config.onSuccess(registration);
- }
- }
- }
- };
- };
- }).catch(function (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).then(function (response) {
- // Ensure service worker exists, and that we really are getting a JS file.
- var 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(function (registration) {
- registration.unregister().then(function () {
- window.location.reload();
- });
- });
- } else {
- // Service worker found. Proceed as normal.
- registerValidSW(swUrl, config);
- }
- }).catch(function () {
- console.log('No internet connection found. App is running in offline mode.');
- });
- }
- function unregister() {
- if ('serviceWorker' in navigator) {
- navigator.serviceWorker.ready.then(function (registration) {
- registration.unregister();
- });
- }
- }
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