Bug 146160

Summary:	AX: Infinite scroll pattern does not work with VoiceOver
Product:	WebKit	Reporter:	Dima Voytenko <dvoytenko>
Component:	Accessibility	Assignee:	Nobody <webkit-unassigned>
Status:	RESOLVED WORKSFORME
Severity:	Major	CC:	benjamin, cfleizach, fred.wang, jcraig, jdiggs, rbuis, rbyers, simon.fraser, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	528+ (Nightly build)
Hardware:	iPhone / iPad
OS:	iOS 8.2

Description Dima Voytenko 2015-06-19 13:30:24 PDT

OS: iOS 8.3
Screen reader: VoiceOver

It appears that when the new content is loaded dynamically onto the web page during the infinite scroll, VoiceOver fails to refresh its navigation buffers, thus making the user believe that there is nothing more to read.

Steps to reproduce:
1. Start VoiceOver via Settings->General->Accessibility->VoiceOver.
2. There is a Gist at: http://output.jsbin.com/zazayi/1/
3. Switch the rotor to "headings", then begin swiping down to move between headings on the page.
4. When you reach each 2nd heading, notice that VoiceOver does not let you scroll down to load more content even though this is possible without it on.

We have tried aria-busy and various combination of DOM events to force VoiceOver "pay attention", but nothing seems to work.

Comment 1 Radar WebKit Bug Importer 2015-06-19 13:31:00 PDT

<rdar://problem/21466398>

Comment 2 Rick Byers 2015-06-19 13:35:18 PDT

/cc a few folks who might be interested.  Note that this is actively affecting accessibility of Google products on Safari.

Comment 3 Simon Fraser (smfr) 2015-07-01 08:55:18 PDT

Does the test content use -webkit-overflow-scrolling: touch?

Comment 4 Dima Voytenko 2015-07-01 09:44:04 PDT

The test uses BODY scrolling, not DIV. But I believe overflow-scrolling:touch doesn't change the behavior in this case.

Comment 5 Frédéric Wang (:fredw) 2019-05-28 05:45:53 PDT

Since iOS 12 the situation is worse: new content is even not loaded dynamically. This still happens in iOS 12.4 beta 2 (May 20).

Comment 6 Frédéric Wang (:fredw) 2019-06-26 23:28:12 PDT

(In reply to Frédéric Wang (:fredw) from comment #5)
> Since iOS 12 the situation is worse: new content is even not loaded
> dynamically. This still happens in iOS 12.4 beta 2 (May 20).

Likely I made a mistake when I tested with iOS 12: In order to focus the last child and get more content loaded, one need to *double-tap* the element (when VoiceOver is on). 

In any case, I tried the testcase again in iOS 13.0 beta 2 (17A5508m) and I can now navigate the new content when navigating by headings.