service-worker.js

/**
 * @license
 * Copyright (c) 2016 The Polymer Project Authors. All rights reserved.
 * This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
 * The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
 * The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
 * Code distributed by Google as part of the polymer project is also
 * subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
 */

/* eslint no-console: ["error", { allow: ["info"] }] */

console.info(
  'Service worker disabled for development, will be generated at build time.'
);

self.addEventListener('install', event => {
  event.waitUntil(
    caches.open('offline-v1')
      .then(cache => cache.addAll([
        '/offline.html'
      ]))
  );
});

self.addEventListener('fetch', event => {
  event.respondWith(
    caches.match(event.request)
      .then(response => response || fetch(event.request))
      .catch(() => {
        if (event.request.mode == 'navigate') {
          return caches.match('/offline.html');
        }
      })
  );
});