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Re: Sliders and their expected behavior

for

From: Bryan Garaventa
Date: Feb 20, 2015 11:01AM

One thing to note, which isn't mentioned in the ARIA Authoring Practices Guide, is that aria-orientation should be set to indicate
the vertical/horizontal orientation of a slider.
http://www.w3.org/WAI/PF/aria/states_and_properties#aria-orientation

There are still some screen reader bugs associated with this attribute, which can be seen by comparing feedback at
Horizontal: http://whatsock.com/tsg/Coding%20Arena/ARIA%20Sliders/Horizontal/demo.htm
Vertical: http://whatsock.com/tsg/Coding%20Arena/ARIA%20Sliders/Vertical/demo.htm

In JAWS16 for example, in IE11 and FF, if you set focus to the slider in Forms Mode then tab out then into the slider, it will
announce the literal opposite of what it should be doing for the proper orientation, saying that a horizontal slider is a "Up Down
Slider", and the vertical slider is a "Left Right Slider". This is a bug in JAWS however.