| self.addEventListener('activate', event => { | |
| event.waitUntil( | |
| self.registration.navigationPreload.enable()); | |
| }); | |
| self.addEventListener('fetch', event => { | |
| event.respondWith(event.preloadResponse | |
| .then( | |
| _ => new Response('Fail: got a response'), | |
| _ => new Response('Done'))); | |
| }); |