aria-invalid is confusing

• From: Alexander Surkov <surkov.alexander@gmail.com>
• Date: Mon, 4 Feb 2013 18:43:23 +0800
• To: wai-xtech@w3.org
• Message-ID: <CA+epNsehKYK6br+swxjrU2v5t=Z-o46eu4mfUFcx3QYaL8b+rw@mail.gmail.com>

Hi. The spec says
(http://www.w3.org/WAI/PF/aria/states_and_properties#aria-invalid):

"For future expansion, the aria-invalid attribute is an enumerated
type. Any value not recognized in the list of allowed values MUST be
treated by user agents as if the value true had been provided. If the
attribute is not present, or its value is false, or its value is an
empty string, the default value of false applies."

In particular this means that

<div aria-invalid="true">
  <span>1st span</span>
  <span aria-invalid="false">2nd span</span>
</div>

Both "1st span" and "2nd span" text ranges should have "invalid:false"
text attributes because "if the attribute is not present, or its value
is false then the default value of false applies". It doesn't seem
this behavior in the context of the "1st span" text range is evident
and actually wanted.

Thank you.
Alex.

Received on Monday, 4 February 2013 10:44:04 UTC