Return Service worker Types.

Feature	Service Worker	Shared Worker
Scope	Tied to a specific origin and scope.	Can be accessed by multiple tabs/windows.
Lifecycle	Event-driven (install, activate, fetch).	Long-lived and persistent.
Communication	Communicates via postMessage and events.	Communicates via postMessage and ports.
Use Cases	Offline caching, push notifications, etc.	Shared state, real-time communication, etc.

Example of my service worker in Chrome.

Script URL	Source	Purpose
chrome-extension://ghbmnnjooekpmoecnnnilnnbdlolhkhi/service_worker_bin_prod.js	Chrome Extension	Handles background tasks or messaging for the extension.
chrome-extension://neajdppkdcdipfabeoofebfddakdcjhd/service_worker.js	Chrome Extension	Handles background tasks or messaging for the extension.
https://1450ji39f5qsvhvum7333pf504an4krk9avs5ulvjs9n9a9lfufr.cloudshell.googleusercontent.com/...	Google Cloud Shell	Manages webview or offline functionality for Google Cloud Shell.
https://ai.google.dev/sw.js	Google AI	Enables offline functionality or caching for the AI developer site.
https://android-dot-devsite-v2-prod.appspot.com/sw.js	Android Developer Site	Caches resources for offline access on the Android developer site.
https://appstore.vivo.com.br/tpush-sw.js?app=dc83bf1c-ee68-4d65-9431-417ce9c26b36	Vivo App Store	Handles push notifications or caching for the Vivo App Store.
https://chat.google.com/serviceworker.js?xhrRoot=%2Fu%2F0%2F_%2FDynamiteWebUi...	Google Chat	Manages offline functionality or push notifications for Google Chat.
https://chrome-stats.com/service-worker.js	Chrome Stats	Likely caches resources or handles analytics for the Chrome Stats site.
https://cloud.google.com/sw.js	Google Cloud	Enables offline functionality or caching for the Google Cloud site.
https://cloudshell.googleusercontent.com/static/sw.js	Google Cloud Shell	Manages offline functionality or caching for Google Cloud Shell.
https://console.cloud.google.com/p/sw/serviceworker.js	Google Cloud Console	Handles offline functionality or caching for the Google Cloud Console.
https://developer.android.com/sw.js	Android Developer Site	Caches resources for offline access on the Android developer site.
https://developer.chrome.com/sw.js	Chrome Developer Site	Enables offline functionality or caching for the Chrome developer site.
https://drive.google.com/odp/odp_serviceworker.js	Google Drive	Manages offline functionality or caching for Google Drive.
https://drive.google.com/_/AppsNotifyUi/serviceworker.js...	Google Drive	Handles push notifications or caching for Google Drive.
https://firebase-dot-devsite-v2-prod.appspot.com/sw.js	Firebase Developer Site	Caches resources for offline access on the Firebase developer site.
https://firebase.google.com/sw.js	Firebase	Enables offline functionality or caching for the Firebase site.
https://livechat.jino.ru/livechat/1.0.0/sw.js	Jino Live Chat	Manages push notifications or caching for the Jino Live Chat service.
https://mail.google.com/mail/u/0/sw.js?offline_allowed=1	Gmail	Enables offline functionality for Gmail.
https://mail.google.com/mail/u/1/sw.js?offline_allowed=1	Gmail	Enables offline functionality for Gmail (secondary account).
https://mail.google.com/chat/u/0/sw.js	Google Chat	Manages offline functionality or push notifications for Google Chat.
https://mail.google.com/chat/u/0/crsw.js	Google Chat	Likely handles push notifications or caching for Google Chat.
https://meet.google.com/meetsw.js...	Google Meet	Manages offline functionality or push notifications for Google Meet.
https://next.privat24.ua/sw.js	Privat24	Enables offline functionality or caching for the Privat24 banking site.
https://shell.cloud.google.com/sw.js	Google Cloud Shell	Manages offline functionality or caching for Google Cloud Shell.
https://ui.perfetto.dev/service_worker.js?v=v35.0-8019b8809	Perfetto UI	Handles offline functionality or caching for the Perfetto UI.
https://www.amazon.com/service-worker.js	Amazon	Enables offline functionality or caching for the Amazon site.
https://www.googletagmanager.com/static/service_worker/4cc0/sw.js?origin=https%3A%2F%2Fone.google.com	Google Tag Manager	Manages analytics or caching for Google Tag Manager.
https://www.googletagmanager.com/static/service_worker/4al0/sw.js?origin=https%3A%2F%2Fwww.merge.dev	Google Tag Manager	Manages analytics or caching for Google Tag Manager.
https://www.googletagmanager.com/static/service_worker/4cc0/sw.js?origin=https%3A%2F%2Fwww.pushengage.com	Google Tag Manager	Manages analytics or caching for Google Tag Manager.
https://www.reddit.com/sw.js	Reddit	Enables offline functionality or caching for Reddit.
https://www.upwork.com/ab/account-security/sw.js	Upwork	Manages offline functionality or caching for Upwork.
https://www.youtube.com/sw.js	YouTube	Enables offline functionality or caching for YouTube.
http://localhost:8080/SW02.js	Your Local Server	Your custom Service Worker for caching and offline functionality.

Service worker working differently in each Browser.

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ES6 context:

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