using cache addAll on Service Worker install

cache-add.js

self.addEventListener('install', function (event) {
  event.waitUntil(
    caches.open('your cache name').then(function (cache) {
      return cache.addAll([
        '/some-route',
        'js/my-app.js',
        'css/my-app.css',
        'imgs/my-app.png',
        'https://fonts.gstatic.com/s/roboto/v15/2UX7WLTfW3W8TclTUvlFyQ.woff',
        'https://fonts.gstatic.com/s/roboto/v15/d-6IYplOFocCacKzxwXSOD8E0i7KZn-EPnyo3HZu7kw.woff',
        ...
      ]);
    })
  );
});