> login forms that hide password fields until you've entered the username I've been lead to believe that this is for websites that support authentication by mu

> login forms that hide password fields until you've entered the username I've been lead to believe that this is for websites that support authentication by multiple methods. If you submit your email address first they can look it up and see that you auth with SAML, or log you in through Google, or if you login with a password they can then render that form for you.