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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,73 @@ | ||
| /* eslint-disable no-restricted-globals */ | ||
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| // 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. | ||
|
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| 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"; | ||
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| clientsClaim(); | ||
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| // 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. | ||
|
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||
| return true; | ||
| }, | ||
| createHandlerBoundToURL(process.env.PUBLIC_URL + "/index.html") | ||
| ); | ||
|
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||
| // 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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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,142 @@ | ||
| // This optional code is used to register a service worker. | ||
| // register() is not called by default. | ||
|
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||
| // 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 | ||
|
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| 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}$/ | ||
| ) | ||
| ); | ||
|
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| export function register(config) { | ||
| const isEnvProduction = process.env.NODE_ENV === "production"; | ||
| if (isEnvProduction && "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; | ||
| } | ||
|
|
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| window.addEventListener("load", () => { | ||
| const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`; | ||
|
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||
| 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." | ||
| ); | ||
|
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||
| // 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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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,14 +1,36 @@ | ||
| const createExpoWebpackConfigAsync = require("@expo/webpack-config"); | ||
| const path = require("path"); | ||
| const WorkboxWebpackPlugin = require("workbox-webpack-plugin"); | ||
|
|
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| module.exports = async function (env, argv) { | ||
| const config = await createExpoWebpackConfigAsync( | ||
| { | ||
| ...env, | ||
| // Passing true will enable the default Workbox + Expo SW configuration. | ||
| offline: true, | ||
| }, | ||
| argv | ||
| ); | ||
| // Customize the config before returning it. | ||
| // Set by expo-cli during `expo build:web` | ||
| const isEnvProduction = env.mode === "production"; | ||
|
|
||
| // Create the default config | ||
| const config = await createExpoWebpackConfigAsync(env, argv); | ||
|
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| if (isEnvProduction) { | ||
| config.plugins.push( | ||
| // Generate a service worker script that will precache, and keep up to date, | ||
| // the HTML & assets that are part of the webpack build. | ||
| new WorkboxWebpackPlugin.InjectManifest({ | ||
| swSrc: path.resolve(__dirname, "src/service-worker.js"), | ||
| dontCacheBustURLsMatching: /\.[0-9a-f]{8}\./, | ||
| exclude: [ | ||
| /\.map$/, | ||
| /asset-manifest\.json$/, | ||
| /LICENSE/, | ||
| /\.js\.gz$/, | ||
| // Exclude all apple touch and chrome images because they're cached locally after the PWA is added. | ||
| /(apple-touch-startup-image|chrome-icon|apple-touch-icon).*\.png$/, | ||
| ], | ||
| // Bump up the default maximum size (2mb) that's precached, | ||
| // to make lazy-loading failure scenarios less likely. | ||
| // See https://github.com/cra-template/pwa/issues/13#issuecomment-722667270 | ||
| maximumFileSizeToCacheInBytes: 5 * 1024 * 1024, | ||
| }) | ||
| ); | ||
| } | ||
|
|
||
| return config; | ||
| }; | ||
| }; |
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