litejs/lib/template/default/ui/worker.js

Single-page application framework

var VERSION = "2019"
, FILES = [
	"index.html"
]
, cacheList = [
	VERSION
]
, isFileRe = /\/[-\.\w]+\.\w+$/

function log() {
	//console.log.apply(console.log, arguments)
}

addEventListener("install", function(event) {
	log("install", VERSION)
	event.waitUntil(
		caches.open(VERSION)
		.then(cache => cache.addAll(FILES))
	)
})

addEventListener("activate", function(event) {
	log("activate", VERSION)
	event.waitUntil(clients.claim())
	caches.keys()
	.then(keys => Promise.all(keys.map(key => {
		if (cacheList.indexOf(key) < 0) {
			log("caches.delete", key)
			return caches.delete(key)
		}
	})))
})


addEventListener("fetch", function(event) {
	var url = event.request.url.slice(registration.scope.length).split("?")[0] || "index.html"

	if (
		event.request.method === "GET" &&
		isFileRe.test(url)
	) event.respondWith(
		caches.open(VERSION)
		.then(function(cache) {
			return cache.match(url, { ignoreSearch: true })
			.then(function(response) {
				if (!response) log("MISS", url)
				return response || fetch(event.request)
			})
		})
	)
})

addEventListener("message", function(event) {
	var op = event.data.op || event.data
	if (op === "reload") {
		skipWaiting()
	}
})