Top 1,000,000: Progressive Web Apps
This report examines the state of Progressive Web Apps (PWAs). PWAs are a new class of web applications, enabled by the Service Worker APIs. Service workers allow apps to support network-independent loading, to receive push notifications as well as to synchronize data in the background, and — together with Web App Manifests — allow users to install PWAs.
This metric tracks the median PWA score in Lighthouse. Lighthouse is popular automated tool for improving the quality of web pages.
Service Worker Controlled Pages
This metric tracks the percentage of pages that have triggered the
ServiceWorkerControlledPage use counter that fires whenever a page is controlled by a service worker.