1317287 - aria-live fails to announce additions that are transitioned and delayed with CSS

Status: RESOLVED WORKSFORME

(Core :: Disability Access APIs, defect)

Description

[Neil]

User Agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.71 Safari/537.36

Steps to reproduce:

A slider uses aria-live="assertive" and aria-relevant="additions" to announce newly entered items.
The "hidden" items are hidden by having visibility: hidden styles. 



Actual results:

When item visibility is changed through css transition (transition: visibility 0s 0.3s;), it is not announced. 


Expected results:

The added visible item should be announced (by NVDA)

Comment 1

[Marco Zehe (:MarcoZ)]

Alex, I could reproduce this. Can you investigate why we're not firing the aria-live events here?

Comment 2

[alexander :surkov (:asurkov)]

(In reply to Marco Zehe (:MarcoZ) from comment #1)
> Alex, I could reproduce this. Can you investigate why we're not firing the
> aria-live events here?

do we fire show mutation events? If not, then the issue is rather at the junction of layout and accessibility, I would expect that layout doesn't notify a11y. Can you confirm whether there's an eventing problem?

Comment 3

[Marco Zehe (:MarcoZ)]

Having to defer this to Jamie if he can take a look in the next few days. Am still out sick and won't return before Monday November 21.

Comment 4

[Marco Zehe (:MarcoZ)]

Neil, you filed this bug originally, but I can no longer reproduce it with Firefox 60 nightly or 59 beta and NVDA. Can you look on your end if this is still an issue?

Comment 5

[James Teh [:Jamie]]

This works as expected for me now, as per comment 4.