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Original file line number | Diff line number | Diff line change |
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importScripts('https://storage.googleapis.com/workbox-cdn/releases/5.1.2/workbox-sw.js'); | ||
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const CACHE = "pwabuilder-page"; | ||
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// TODO: replace the following with the correct offline fallback page i.e.: const offlineFallbackPage = "offline.html"; | ||
const offlineFallbackPage = "ToDo-replace-this-name.html"; | ||
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self.addEventListener("message", (event) => { | ||
if (event.data && event.data.type === "SKIP_WAITING") { | ||
self.skipWaiting(); | ||
} | ||
}); | ||
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self.addEventListener('install', async (event) => { | ||
event.waitUntil( | ||
caches.open(CACHE) | ||
.then((cache) => cache.add(offlineFallbackPage)) | ||
); | ||
}); | ||
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if (workbox.navigationPreload.isSupported()) { | ||
workbox.navigationPreload.enable(); | ||
} | ||
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self.addEventListener('fetch', (event) => { | ||
if (event.request.mode === 'navigate') { | ||
event.respondWith((async () => { | ||
try { | ||
const preloadResp = await event.preloadResponse; | ||
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if (preloadResp) { | ||
return preloadResp; | ||
} | ||
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const networkResp = await fetch(event.request); | ||
return networkResp; | ||
} catch (error) { | ||
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const cache = await caches.open(CACHE); | ||
const cachedResp = await cache.match(offlineFallbackPage); | ||
return cachedResp; | ||
} | ||
})()); | ||
} | ||
}); |
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