progressive web apps - Using service workers across multiple subdomains

Question

If my web app consists of more than one subdomain, does that mean I have to have multiple service workers, one for each subdomain? Or can I have one service worker that works across subdomains?

Answer 1

Each subdomain is considered a different origin, so yes, you will need to register a service worker for each one. Each of these workers will have its own cache and scope.