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Note this comes with some pitfalls. // Learn more about service workers: https://bit.ly/CRA-PWA -serviceWorker.register(); +serviceWorkerRegistration.register(); window.addEventListener('load', () => { // @ts-ignore diff --git a/src/service-worker.ts b/src/service-worker.ts new file mode 100644 index 0000000..652a8a4 --- /dev/null +++ b/src/service-worker.ts @@ -0,0 +1,80 @@ +/// +/* eslint-disable no-restricted-globals */ + +// This service worker can be customized! +// See https://developers.google.com/web/tools/workbox/modules +// for the list of available Workbox modules, or add any other +// code you'd like. +// You can also remove this file if you'd prefer not to use a +// service worker, and the Workbox build step will be skipped. + +import { clientsClaim } from 'workbox-core'; +import { ExpirationPlugin } from 'workbox-expiration'; +import { precacheAndRoute, createHandlerBoundToURL } from 'workbox-precaching'; +import { registerRoute } from 'workbox-routing'; +import { StaleWhileRevalidate } from 'workbox-strategies'; + +declare const self: ServiceWorkerGlobalScope; + +clientsClaim(); + +// Precache all of the assets generated by your build process. +// Their URLs are injected into the manifest variable below. +// This variable must be present somewhere in your service worker file, +// even if you decide not to use precaching. See https://cra.link/PWA +precacheAndRoute(self.__WB_MANIFEST); + +// Set up App Shell-style routing, so that all navigation requests +// are fulfilled with your index.html shell. Learn more at +// https://developers.google.com/web/fundamentals/architecture/app-shell +const fileExtensionRegexp = new RegExp('/[^/?]+\\.[^/]+$'); +registerRoute( + // Return false to exempt requests from being fulfilled by index.html. + ({ request, url }: { request: Request; url: URL }) => { + // If this isn't a navigation, skip. + if (request.mode !== 'navigate') { + return false; + } + + // If this is a URL that starts with /_, skip. + if (url.pathname.startsWith('/_')) { + return false; + } + + // If this looks like a URL for a resource, because it contains + // a file extension, skip. + if (url.pathname.match(fileExtensionRegexp)) { + return false; + } + + // Return true to signal that we want to use the handler. + return true; + }, + createHandlerBoundToURL(process.env.PUBLIC_URL + '/index.html') +); + +// An example runtime caching route for requests that aren't handled by the +// precache, in this case same-origin .png requests like those from in public/ +registerRoute( + // Add in any other file extensions or routing criteria as needed. + ({ url }) => url.origin === self.location.origin && url.pathname.endsWith('.png'), + // Customize this strategy as needed, e.g., by changing to CacheFirst. + new StaleWhileRevalidate({ + cacheName: 'images', + plugins: [ + // Ensure that once this runtime cache reaches a maximum size the + // least-recently used images are removed. + new ExpirationPlugin({ maxEntries: 50 }), + ], + }) +); + +// This allows the web app to trigger skipWaiting via +// registration.waiting.postMessage({type: 'SKIP_WAITING'}) +self.addEventListener('message', (event) => { + if (event.data && event.data.type === 'SKIP_WAITING') { + self.skipWaiting(); + } +}); + +// Any other custom service worker logic can go here. diff --git a/src/serviceWorker.ts b/src/serviceWorkerRegistration.ts similarity index 86% rename from src/serviceWorker.ts rename to src/serviceWorkerRegistration.ts index b09523f..efbf2ac 100644 --- a/src/serviceWorker.ts +++ b/src/serviceWorkerRegistration.ts @@ -8,16 +8,14 @@ // resources are updated in the background. // To learn more about the benefits of this model and instructions on how to -// opt-in, read https://bit.ly/CRA-PWA +// 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}$/ - ) + window.location.hostname.match(/^127(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/) ); type Config = { @@ -28,10 +26,7 @@ type Config = { export function register(config?: Config) { if (process.env.NODE_ENV === 'production' && '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 - ); + const 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 @@ -51,7 +46,7 @@ export function register(config?: Config) { navigator.serviceWorker.ready.then(() => { console.log( 'This web app is being served cache-first by a service ' + - 'worker. To learn more, visit https://bit.ly/CRA-PWA' + 'worker. To learn more, visit https://cra.link/PWA' ); }); } else { @@ -65,7 +60,7 @@ export function register(config?: Config) { function registerValidSW(swUrl: string, config?: Config) { navigator.serviceWorker .register(swUrl) - .then(registration => { + .then((registration) => { registration.onupdatefound = () => { const installingWorker = registration.installing; if (installingWorker == null) { @@ -79,7 +74,7 @@ function registerValidSW(swUrl: string, config?: Config) { // 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 https://bit.ly/CRA-PWA.' + 'tabs for this page are closed. See https://cra.link/PWA.' ); // Execute callback @@ -101,7 +96,7 @@ function registerValidSW(swUrl: string, config?: Config) { }; }; }) - .catch(error => { + .catch((error) => { console.error('Error during service worker registration:', error); }); } @@ -109,9 +104,9 @@ function registerValidSW(swUrl: string, config?: Config) { function checkValidServiceWorker(swUrl: string, config?: Config) { // Check if the service worker can be found. If it can't reload the page. fetch(swUrl, { - headers: { 'Service-Worker': 'script' } + headers: { 'Service-Worker': 'script' }, }) - .then(response => { + .then((response) => { // Ensure service worker exists, and that we really are getting a JS file. const contentType = response.headers.get('content-type'); if ( @@ -119,7 +114,7 @@ function checkValidServiceWorker(swUrl: string, config?: Config) { (contentType != null && contentType.indexOf('javascript') === -1) ) { // No service worker found. Probably a different app. Reload the page. - navigator.serviceWorker.ready.then(registration => { + navigator.serviceWorker.ready.then((registration) => { registration.unregister().then(() => { window.location.reload(); }); @@ -130,19 +125,17 @@ function checkValidServiceWorker(swUrl: string, config?: Config) { } }) .catch(() => { - console.log( - 'No internet connection found. App is running in offline mode.' - ); + console.log('No internet connection found. App is running in offline mode.'); }); } export function unregister() { if ('serviceWorker' in navigator) { navigator.serviceWorker.ready - .then(registration => { + .then((registration) => { registration.unregister(); }) - .catch(error => { + .catch((error) => { console.error(error.message); }); }