51 lines
1.6 KiB
JavaScript
51 lines
1.6 KiB
JavaScript
/*
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Copyright 2020 Bruno Windels <bruno@windels.cloud>
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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const VERSION = "%%VERSION%%";
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const OFFLINE_FILES = "%%OFFLINE_FILES%%";
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// TODO: cache these files when requested
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// The difficulty is that these are relative filenames, and we don't have access to document.baseURI
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// Clients.match({type: "window"}).url and assume they are all the same? they really should be ... safari doesn't support this though
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const CACHE_FILES = "%%CACHE_FILES%%";
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const cacheName = `hydrogen-${VERSION}`;
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self.addEventListener('install', function(e) {
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e.waitUntil(
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caches.open(cacheName).then(function(cache) {
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return cache.addAll(OFFLINE_FILES);
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})
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);
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});
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self.addEventListener('activate', (event) => {
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event.waitUntil(
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caches.keys().then((keyList) => {
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return Promise.all(keyList.map((key) => {
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if (key !== cacheName) {
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return caches.delete(key);
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}
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}));
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})
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);
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});
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self.addEventListener('fetch', (event) => {
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event.respondWith(
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caches.open(cacheName)
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.then(cache => cache.match(event.request))
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.then((response) => response || fetch(event.request))
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);
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});
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