Autocomplete - updated demo

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Rich Caloggero

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Nov 30, 2010, 5:00:37 PM11/30/10
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http://www.mit.edu/~rjc/aria/autocomplete.multiple.html

Description

This is my attempt at defining what I consider to be reasonable behavior for
Autocomplete for multiple items. This is based on the demo on the jQuery-ui
site.

This may not be the best way of implementing this behavior, but does work with
both version 11 and version 12 of Jaws. Live regions are used to read the
menu, since focus remains in the input element. Live regions also provide a
way of announcing item counts to the user. this is importans since there is
no way for the user to know that her input was matched and how long the list
of matches is. This status info is written to a hidden div available to
screen readers (uses css clip).

Note that Jaws will keep focus within the input field since we use
role="application" on the div containing the input element; In Jaws 12, focus
is kept
in the field even when escape is pressed. Numpad enter is the only way to
return to browse mode when using Jaws12.

Up / Down arrows read the menu.

Live region markup is used to provide a count of matches as you type. Typing
"s" should announce (10 items). Following this with "x" should announce "no
matches". I try and only speak item counts when they actually change. This
proved to be a bit tricky to implement.


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