Ugh I missed that bootstrap 4 is required by the show/hide github repo.

However a cleanroom or other implementation is welcome. See also:

https://technology.blog.gov.uk/2021/04/19/simple-things-are-complicated-making-a-show-password-
option/

To note:

  * don’t allow users to submit text inputs containing passwords

so if the password is visible when the submit button is hit, change it
back to a password field.  Otherwise autocomplete can store the
password. This is bad as the password should only be in the password
manager.