This site can be used to test the WebAuthn spec on the Chrome, Firefox, and Edge browsers.
Currently, the WebAuthn spec supports credential creation and assertion best using U2F Token, like those provided by Yubico and Feitian.
The code for this demo can be found here on GitHub.
To see what's happening under the hood when you create a test user and login using WebAuthn below, you can open your web browser's console and
see the output of the necessary credential objects being used.