Service worker only cache origin file, so You dont need to precache cross origin file such as https://fonts.googleapis.com
Or you can try from here https://developers.google.com/web/updates/2016/09/foreign-fetch
Service worker only cache origin file, so You dont need to precache cross origin file such as https://fonts.googleapis.com
Or you can try from here https://developers.google.com/web/updates/2016/09/foreign-fetch