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by hknd 2961 days ago
You are probably mistaken SW for Web Workers.

Web Workers are used to offload work to another thread and can communicate with messages

Service Workers is a new API which is now supported by all major browsers.

SW is branded as: Rich offline experiences, periodic background syncs, push notifications and more. "A service worker is a script that your browser runs in the background, separate from a web page, opening the door to features that don't need a web page or user interaction."

Full article on this topic: https://developers.google.com/web/fundamentals/primers/servi...