aria-current="false" is read as aria-current="true"

[ShadowBB]

Steps to reproduce:

1. Make HTML file with the following txt:
   ARIA current.txt

2. Open the page (tested with Firefox, Chrome and IE)

3. Navigate to the the third list item ("item false").

4. Notice the list item being announced as "Current".

Expected behavior:

The third list item is not announced as "current"

Actual behavior:

The third list item is announced as "current"

System configuration:

NVDA version:
2017.4

NVDA Installed or portable:
Installed

Other information:
NA

Windows version:
Windows 10 Home Version 1709 Build 16299.125

Other questions:

Does the issue still occur after restarting your PC?
Yes.

Have you tried any other versions of NVDA?
No.

[bramd]

I think this might be according to the ARIA spec (see https://www.w3.org/TR/wai-aria-1.1/#aria-current):

The aria-current attribute is an enumerated type. Any value not included in the list of allowed values SHOULD be treated by assistive technologies as if the value true had been provided.

False is an allowed value, but it is the default and indicated by omitting a value or omitting the whole aria-current attribute. Some feedback of the spec authors would be welcome here.

[LeonarddeR]

JAWS 2018 treats a value of false as real false. @bramd: Note that, even though false is the default, it is an allowed value in the enumeration as you pointed out. Only non-allowed values should be treated as true.

[bramd]

That's right. The only point of confusion here might be that there are more attributes which are true is any value is set, but when I'm just reading this part of the spec I think false should be allowed as a value that is equal to false.

[Adriani90]

closing as works for me, solved in #7901. I have tested in IE11, Chrome 71 and Firefox 64.0.2. I cannot reproduce it. @ShadowBB please comment on this if it is still occuring and we will reopen it. Thanks for reporting.