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January 4, 2024 09:09
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service-worker.ts
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/// <reference lib="webworker" /> | |
/* 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. |
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