Registering a Service Worker
Install and activate a service worker.
What Is a Service Worker?
A service worker is a script the browser runs in the background, separate from the page. It acts as a programmable network proxy: it can intercept requests, serve cached responses, and enable offline experiences.
Feature Detection
Not every environment supports service workers. Check for navigator.serviceWorker before registering so older browsers degrade gracefully.
if ('serviceWorker' in navigator) {
// safe to register
}All lessons in this course
- Registering a Service Worker
- The Cache API
- Caching Strategies
- Background Sync and Updates