I want to notify a user if something has happened when the browser window is in the background. For my use case, the js Notification API is perfect.Initial implementation of Service Worker with Workbox in the Phoenix framework for optimizing image caching and enhancing user experience. A service worker script should be installed on the domain, which has the responsibility to cache frequently used static resources (HTML, CSS, JS, etc). Apply to Server, Retail Sales Associate, Trade Assistant and more! In this codelab, you'll use a service worker to manage notifications. The instructions here assume that you're already familiar with service workers. The incumbent serves as a Food Service Worker performing a full range of duties for the Phoenix Veterans Affairs Healthcare System, Nutrition and Food Service. Please turn on JavaScript and try again. City of Phoenix. Search.