sw.js

var _cacheName = 'cimbar-js-v0.6.1';
var _cacheFiles = [
  '/',
  '/index.html',
  '/cimbar_js.js',
  // '/cimbar_js.wasm',
  '/favicon.ico',
  '/main.js',
  // '/pwa.json'
];

// fetch files
self.addEventListener('install', function(e) {
  e.waitUntil(
    caches.open(_cacheName).then(function(cache) {
      return cache.addAll(_cacheFiles);
    })
  );
  self.skipWaiting();
});

// serve from cache
self.addEventListener('fetch', function(e) {
  e.respondWith(
    caches.match(e.request).then(function(response) {
      return response || fetch(e.request);
    })
  );
});

// clean old caches
self.addEventListener('activate', function(e) {
  e.waitUntil(function() {
    caches.keys().then(function(names) {
      for (var i in names)
         if (names[i] != _cacheName)
            caches.delete(names[i]);
    });
  });
});