[Webkit-unassigned] [Bug 164031] New: AX: aria-valuetext not spoken to VoiceOver iOS when starting with a digit i.e. aria-valuetext="68 degrees" is never spoken

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=164031

            Bug ID: 164031
           Summary: AX: aria-valuetext not spoken to VoiceOver iOS when
                    starting with a digit i.e. aria-valuetext="68 degrees"
                    is never spoken
    Classification: Unclassified
           Product: WebKit
           Version: Safari 10
          Hardware: iPhone / iPad
                OS: iOS 10
            Status: NEW
          Severity: Major
          Priority: P2
         Component: Accessibility
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: paul at pauljadam.com
                CC: webkit-bug-importer at group.apple.com

Overview:
When VoiceOver iOS 10.1 user sets focus on an ARIA slider element with aria-valuetext="68 degrees" VoiceOver will not speak "68 degrees" it only speaks "68, 36 percent". If you place a non-digit string in the front e.g. aria-valuetext="Currently 68 degrees" then VoiceOver speaks it correctly. So starting with a digit in the value breaks the support. 

This does not affect macOS. 

Steps to Reproduce:
1. Enable VoiceOver on iOS 10.1
2. Visit https://www.w3.org/TR/wai-aria-practices-1.1/examples/slider/slider-2.html in Safari iOS
3. Set VoiceOver focus to the 68 degrees slider.

Expected Results:
VoiceOver iOS speaks: "Temperature 68 degrees, adjustable, swipe up or down with one finger to adjust the value"

Actual Results:
VoiceOver iOS speaks: "Temperature 68, 36 percent, adjustable, swipe up or down with one finger to adjust the value"

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