I want to access my service worker's scope inside of a fetch event listener. My planned workaround was to use window.location.host, but window isn't available inside the service worker. I also tried using ServiceWorkerRegistration.scope (MDN doc), which would return the value I want, but this also isn't accessible inside the fetch event handler.
I'm hoping there's something similar to event.scope (available in the registration handler), but for fetch handlers. Is this possible?
After some digging around in Chrome dev tools, I found the variable I was looking for: self.location.host. This references the ServiceWorkerGlobalScope, which has a property of 'location'.
I found a similar usage in the Google Chrome team's example service worker using self.location.origin instead:
// Skip cross-origin requests, like those for Google Analytics.
if (event.request.url.startsWith(self.location.origin)) { ... }