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December 25, 2020 04:37
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Service Worker files for Create React App 4.
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/* 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'; | |
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 }) => { | |
// 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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/// <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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// 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 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}$/) | |
); | |
export function register(config) { | |
if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) { | |
// The URL constructor is available in all browsers that support SW. | |
const publicUrl = new URL(process.env.PUBLIC_URL, window.location.href); | |
if (publicUrl.origin !== window.location.origin) { | |
// Our service worker won't work if PUBLIC_URL is on a different origin | |
// from what our page is served on. This might happen if a CDN is used to | |
// serve assets; see https://github.com/facebook/create-react-app/issues/2374 | |
return; | |
} | |
window.addEventListener('load', () => { | |
const swUrl = `${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(() => { | |
console.log( | |
'This web app is being served cache-first by a service ' + | |
'worker. To learn more, visit https://cra.link/PWA' | |
); | |
}); | |
} else { | |
// Is not localhost. Just register service worker | |
registerValidSW(swUrl, config); | |
} | |
}); | |
} | |
} | |
function registerValidSW(swUrl, config) { | |
navigator.serviceWorker | |
.register(swUrl) | |
.then((registration) => { | |
registration.onupdatefound = () => { | |
const installingWorker = registration.installing; | |
if (installingWorker == null) { | |
return; | |
} | |
installingWorker.onstatechange = () => { | |
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 https://cra.link/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((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, { | |
headers: { 'Service-Worker': 'script' }, | |
}) | |
.then((response) => { | |
// Ensure service worker exists, and that we really are getting a JS file. | |
const 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((registration) => { | |
registration.unregister().then(() => { | |
window.location.reload(); | |
}); | |
}); | |
} else { | |
// Service worker found. Proceed as normal. | |
registerValidSW(swUrl, config); | |
} | |
}) | |
.catch(() => { | |
console.log('No internet connection found. App is running in offline mode.'); | |
}); | |
} | |
export function unregister() { | |
if ('serviceWorker' in navigator) { | |
navigator.serviceWorker.ready | |
.then((registration) => { | |
registration.unregister(); | |
}) | |
.catch((error) => { | |
console.error(error.message); | |
}); | |
} | |
} |
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// 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 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}$/) | |
); | |
type Config = { | |
onSuccess?: (registration: ServiceWorkerRegistration) => void; | |
onUpdate?: (registration: ServiceWorkerRegistration) => void; | |
}; | |
export function register(config?: Config) { | |
if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) { | |
// The URL constructor is available in all browsers that support SW. | |
const publicUrl = new URL(process.env.PUBLIC_URL, window.location.href); | |
if (publicUrl.origin !== window.location.origin) { | |
// Our service worker won't work if PUBLIC_URL is on a different origin | |
// from what our page is served on. This might happen if a CDN is used to | |
// serve assets; see https://github.com/facebook/create-react-app/issues/2374 | |
return; | |
} | |
window.addEventListener('load', () => { | |
const swUrl = `${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(() => { | |
console.log( | |
'This web app is being served cache-first by a service ' + | |
'worker. To learn more, visit https://cra.link/PWA' | |
); | |
}); | |
} else { | |
// Is not localhost. Just register service worker | |
registerValidSW(swUrl, config); | |
} | |
}); | |
} | |
} | |
function registerValidSW(swUrl: string, config?: Config) { | |
navigator.serviceWorker | |
.register(swUrl) | |
.then((registration) => { | |
registration.onupdatefound = () => { | |
const installingWorker = registration.installing; | |
if (installingWorker == null) { | |
return; | |
} | |
installingWorker.onstatechange = () => { | |
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 https://cra.link/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((error) => { | |
console.error('Error during service worker registration:', error); | |
}); | |
} | |
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' }, | |
}) | |
.then((response) => { | |
// Ensure service worker exists, and that we really are getting a JS file. | |
const 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((registration) => { | |
registration.unregister().then(() => { | |
window.location.reload(); | |
}); | |
}); | |
} else { | |
// Service worker found. Proceed as normal. | |
registerValidSW(swUrl, config); | |
} | |
}) | |
.catch(() => { | |
console.log('No internet connection found. App is running in offline mode.'); | |
}); | |
} | |
export function unregister() { | |
if ('serviceWorker' in navigator) { | |
navigator.serviceWorker.ready | |
.then((registration) => { | |
registration.unregister(); | |
}) | |
.catch((error) => { | |
console.error(error.message); | |
}); | |
} | |
} |
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