What are service workers and how do they relate to Progressive Web Apps?

What are service workers and how do they relate to Progressive Web Apps?

Service workers are scripts that run in the background, separate from a web page, enabling features like offline access and push notifications. They are essential for Progressive Web Apps (PWAs) as they allow these apps to function offline and provide a native app-like experience.

Can you explain how to register a service worker?

To register a service worker, you typically add a script in your main JavaScript file. Use navigator.serviceWorker.register('/service-worker.js') to register the service worker file. Make sure to do this after the DOM is fully loaded.

What are some common use cases for service workers?

Common use cases include caching assets for offline use, intercepting network requests to serve cached content, and enabling push notifications for users.

Are there any limitations or challenges with service workers?

Yes, service workers have limitations such as requiring HTTPS, not being able to access the DOM directly, and potential complexities in managing cache.