WebAIM - Web Accessibility In Mind

E-mail List Archives

Re: Time-out modal with alertdialog

for

From: Bryan Garaventa
Date: Jul 3, 2015 5:31PM

Technically the alertdialog role should fire a system alert when the container is added to the DOM via element.appendChild/replaceChild or element.innerHTML, or when switched into visibility by changing display:none to 'block' or 'inline'.

This might not be working properly though.

Try putting role="alert" on the parent Div, and change the dynamically added container from role="alertdialog" to role="dialog" and see what happens when this is added to the Alert container element.

It will be important to set all of the required attributes however, such as those documented at
http://whatsock.com/training/matrices/#dialog
And to follow the correct setting of focus when it opens.

There is no need to set tabindex="0" on the parent Dialog container, since it's the active elements within that should be focusable. E.G the OK button or whatever. If you need to set focus to a Dialog container, it works better to use tabindex="-1", then manage focus using forward and reverse circular tabbing within the dialog from that point on.

Hopefully this helps a bit.

Best wishes,
Bryan