Where do you go to find a pwa specification?

To find a Progressive Web App (PWA) specification, you can visit the official website of the World Wide Web Consortium (W3C) or the google Developers site, which provides extensive documentation on PWAs. The W3C maintains standards for web technologies, and their resources offer detailed guidelines on service workers, manifests, and other PWA-related technologies. Additionally, the MDN Web Docs is a great resource for comprehensive tutorials and references on implementing PWAs.