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/* eslint-disable no-restricted-globals */ |
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// This service worker can be customized!
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// See https://developers.google.com/web/tools/workbox/modules
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// for the list of available Workbox modules, or add any other
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// code you'd like.
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// You can also remove this file if you'd prefer not to use a
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// service worker, and the Workbox build step will be skipped.
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import { clientsClaim } from 'workbox-core'; |
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import { ExpirationPlugin } from 'workbox-expiration'; |
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import { precacheAndRoute, createHandlerBoundToURL } from 'workbox-precaching'; |
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import { registerRoute } from 'workbox-routing'; |
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import { StaleWhileRevalidate } from 'workbox-strategies'; |
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clientsClaim(); |
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// Precache all of the assets generated by your build process.
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// Their URLs are injected into the manifest variable below.
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// This variable must be present somewhere in your service worker file,
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// even if you decide not to use precaching. See https://cra.link/PWA
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precacheAndRoute(self.__WB_MANIFEST); |
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// Set up App Shell-style routing, so that all navigation requests
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// are fulfilled with your index.html shell. Learn more at
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// https://developers.google.com/web/fundamentals/architecture/app-shell
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const fileExtensionRegexp = new RegExp('/[^/?]+\\.[^/]+$'); |
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registerRoute( |
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// Return false to exempt requests from being fulfilled by index.html.
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({ request, url }) => { |
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// If this isn't a navigation, skip.
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if (request.mode !== 'navigate') { |
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return false; |
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} // If this is a URL that starts with /_, skip.
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if (url.pathname.startsWith('/_')) { |
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return false; |
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} // If this looks like a URL for a resource, because it contains // a file extension, skip.
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if (url.pathname.match(fileExtensionRegexp)) { |
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return false; |
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} // Return true to signal that we want to use the handler.
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return true; |
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}, |
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createHandlerBoundToURL(process.env.PUBLIC_URL + '/index.html'), |
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); |
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// An example runtime caching route for requests that aren't handled by the
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// precache, in this case same-origin .png requests like those from in public/
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registerRoute( |
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// Add in any other file extensions or routing criteria as needed.
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({ url }) => |
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url.origin === self.location.origin && url.pathname.endsWith('.png'), // Customize this strategy as needed, e.g., by changing to CacheFirst.
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new StaleWhileRevalidate({ |
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cacheName: 'images', |
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plugins: [ |
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// Ensure that once this runtime cache reaches a maximum size the
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// least-recently used images are removed.
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new ExpirationPlugin({ maxEntries: 50 }), |
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], |
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}), |
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); |
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// This allows the web app to trigger skipWaiting via
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// registration.waiting.postMessage({type: 'SKIP_WAITING'})
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self.addEventListener('message', (event) => { |
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if (event.data && event.data.type === 'SKIP_WAITING') { |
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self.skipWaiting(); |
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} |
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}); |
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// Any other custom service worker logic can go here.
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