var version = 'v46 - 2018-03-05';
var toCache = [
  '/',
  'index.html',
  'activePage.js',
  'activePage.js.map',
  'config.js',
  'config.js.map',
  'hesla.js',
  'hesla.js.map',
  'hesla.webapp',
  'favicon.ico',
  'icon-128.png',
  'icon-30.png',
  'icon-60.png',
  'index_de.html',
  'require.js',
  'screen.css'
];

self.addEventListener('install', event => {
    event.waitUntil(
      caches.open('static' + version)
      .then(
        c => c.addAll(toCache)
          .then(v => console.log('Yay!'), e => console.log('Error'))
      )
    );
});

self.addEventListener('activate', event => {
  event.waitUntil(caches.keys().then(
        keys => Promise.all(
          keys.filter(key => key != 'static' + version).
            map(key => caches.delete(key))
        )
    )
  );
});

self.addEventListener('fetch', function(event) {
  event.respondWith(caches.match(event.request));
});