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sw.js
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sw.js
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/**
* Basic Service Worker implementation.
* Just caches index.html
*/
// When the SW is installed, it will populate the Browser's cache with some files.
// To check this, use the Developer Console / Application / cache.
this.addEventListener('install', function(event) {
event.waitUntil(
caches.open('v2').then(function(cache) {
return cache.addAll([
'/index.html',
'/',
// now that we also have the manifest using icons...
'/manifest.webmanifest',
'/index.html?pwa=true',
'/favicon.ico',
'/favicons/favicon-144.png',
'/favicons/favicon-196.png',
'/favicons/favicon-96.png',
'/favicons/favicon-64.png',
'/favicons/favicon-32.png',
'/favicons/pwa-logo.png',
]);
})
);
});
// SW intercepts "fetch" events, and as a Proxy can intercept a network request.
// thus we can use the cache to return cached stuff instead of making the request.
this.addEventListener('fetch', function(event) {
event.respondWith(
caches.match(event.request)
.catch(function() {
// if CACHE MISSES, then let the request pass.
return fetch(event.request).
then(function(response) {
// And cache this new response
return caches.open('v1').then(function(cache) {
cache.put(event.request, response.clone());
return response;
});
}).catch(function() {
// if fetch is in error, we can here provide a default resource file.
// TODO
});
})
);
});