self.addEventListener('install', event => {
// Activate immediately to simplify the test.
event.waitUntil(self.skipWaiting());
});
self.addEventListener('activate', event => {
// Make sure the very next navigation is controlled by this SW.
event.waitUntil(self.clients.claim());
});
self.addEventListener('fetch', event => {
// Only handle top-level navigations within our scope.
if (event.request.mode === 'navigate') {
const html = `
SW Intercepted Page
SW-synthesized page
This page was served by a Service Worker via respondWith().
`;
event.respondWith(new Response(html, {
headers: { 'Content-Type': 'text/html; charset=utf-8' }
}));
}
// Otherwise, fall through to network.
});