| self.addEventListener('activate', event => { | |
| event.waitUntil( | |
| Promise.all[ | |
| self.registration.navigationPreload.enable(), | |
| self.registration.navigationPreload.setHeaderValue('hello')]); | |
| }); | |
| self.addEventListener('fetch', event => { | |
| event.respondWith(event.preloadResponse); | |
| }); |