Addressing an important matter within the blind community, I am working on how to communicate with visually impaired visitors that a chosen username is already in use. Currently, my setup involves a jQuery implementation checking user input against a PHP script via Ajax. The returned JSON data is then displayed as an error message on screen.
However, for someone who is blind, they may not realize that the username "Batman" is unavailable or that usernames cannot contain spaces. Additionally, they may overlook the requirement for passwords to be at least 7 characters long.
An alternative method is to list errors on a separate landing page after form submission without JavaScript - although functional, it lacks efficiency. A more dynamic solution with better support would be ideal for enhancing user experience.