underbbs/frontend/ts/serviceWorker.ts

/// <reference lib="WebWorker" />

// export empty type because of tsc --isolatedModules flag
export type {};
declare const self: ServiceWorkerGlobalScope;

self.addEventListener('sync', (e: any) => {
  console.log("I won't see this");
});

self.addEventListener("install", (e: any) => {
  console.log("installation proceeding...")
});

self.addEventListener("activate", (e: any) => {
  console.log("SW activated!");
});