[Webkit-unassigned] [Bug 246426] AX: List size is still announced by VoiceOver despite use of aria-setsize=-1

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=246426

--- Comment #2 from Todd Kloots <todd.kloots at gmail.com> ---
For more context: all lists in Slack are virtualized. And so, with only the items scrolled into view actually rendered into the DOM VoiceOver reports the list size according to what is rendered into the DOM/scrolled into view. Therefore in 99.99% of cases in Slack the list size announced by VoiceOver will be inaccurate (“list of 5 items” when in fact it is a channel with loads and loads of messages) and could be confusing for users.

The ARIA spec indicates use of set-size="-1" when the size of the list is unknown. We've implemented this for all our virtualized lists in Slack, and yet VoiceOver is still announcing the list size.

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