printpreview_images_sw.js (297B)
1 self.addEventListener("fetch", event => { 2 if (event.request.url.includes("nonexistent.png")) { 3 event.respondWith( 4 fetch(event.request.url.replace("nonexistent.png", "blue-32x32.png")) 5 ); 6 } 7 }); 8 9 self.addEventListener("activate", event => { 10 event.waitUntil(clients.claim()); 11 });