Is there a way to verify just a password in the JavaScript version of Parse?
I would like to only validate if a password is correct without logging in the user. The documentation of Parse only shows a login method to validate the password.
I have access to all the user information necessary for this operation.
No, there is no method built in, and the passwords are very protected. It would be an absurdly poor choice to try to access a user's password yourself to do this, if you even could.
Why doesn't the login function suit your needs? You could just not do anything in the success handler, or immediately log out in the success handler.