homepage/content/toys/convulse/sw.js

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// jshint asi:true
var cacheName = "v2";
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var content = [
"index.html",
"convulse.css",
"convulse.js",
"convulse.png"
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]
self.addEventListener("install", preCache)
self.addEventListener("fetch", cachingFetch)
self.addEventListener("activate", handleActivate)
function handleActivate(event){
event.waitUntil(
cleanup()
)
}
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async function cleanup(event) {
let cacheNames = await caches.keys()
for (let name of cacheNames) {
if (name != cacheName) {
console.log("Deleting old cache", name)
caches.delete(name)
}
}
}
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function preCache(event) {
event.waitUntil(
caches.open(cacheName)
.then(cache => cache.addAll(content))
)
}
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// Go try to pull a newer version from the network,
// but return what's in the cache for this request
function cachingFetch(event) {
fetch(event.request)
.then(resp => {
caches.open(cacheName)
.then(cache => {
cache.put(event.request, resp.clone())
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})
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})
event.respondWith(caches.match(event.request))
}