If you attempt to login to github on mobile web, it automatically detects that it's a mobile device and lets you authenticate using a NFC key. I cannot find any documentation for implementing NFC 2FA for mobile web, anyone know how this is done?
Thanks, Kevin
Update:
I have found the vocabulary word for this - its "Webauthn" and apparently there is a way for webauthn to use a U2F device that was registered on a desktop web site on a mobile web site using mobile NFC. I've added the tag in the hopes that someone can help.