Service Workers
Service Workers are a type of web worker that act as a client-side proxy between web applications, the browser, and the network. They enable features like offline functionality, background sync, and push notifications by intercepting and handling network requests programmatically. They run in a separate thread from the main JavaScript execution, allowing them to operate independently even when the web page is closed.
Developers should learn Service Workers to build Progressive Web Apps (PWAs) that provide reliable offline experiences, faster load times through caching strategies, and enhanced user engagement with push notifications. They are essential for creating web applications that feel native-like, particularly in scenarios with unreliable network connectivity or for improving performance on mobile devices.