[Webkit-unassigned] [Bug 141136] New: AX: Focus Link Target (sequential focus navigation starting point)

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=141136

            Bug ID: 141136
           Summary: AX: Focus Link Target (sequential focus navigation
                    starting point)
    Classification: Unclassified
           Product: WebKit
           Version: 528+ (Nightly build)
          Hardware: All
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Accessibility
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mail at rodneyrehm.de
                CC: webkit-bug-importer at group.apple.com

Created attachment 245826
  --> https://bugs.webkit.org/attachment.cgi?id=245826&action=review
test case

Steps to Reproduce:
1. define a non focusable element: <div id="the-target">
2. define a link to that element: <a href="#the-target">
3. click the link, hit <kbd>Tab</kbd> to see where focus ends up


Expected Behavior:
While the non focusable :target (<div id="the-target">) should not have received focus, it should be the element from which the next item in the document's tabbing sequence is identified upon pressing <kbd>Tab</kbd>


What Went Wrong:
Focus was retained on the link element, the tabbing sequence continues from there.


Related Bugs:
https://bugs.webkit.org/show_bug.cgi?id=17450
https://bugs.webkit.org/show_bug.cgi?id=140963
https://bugs.webkit.org/show_bug.cgi?id=17450

Chromium Bug For Reference:
https://code.google.com/p/chromium/issues/detail?id=454172


Additional Notes:
"navigating to a fragment identifier" [1] defines what should happen when an anchor link is clicked. Using the "sequential focus navigation starting point" [2] is the way Gecko handles :target elements that are not focusable.

This behavior renders table of contents and skip-links useless, unless their :target elements are focusable.

[1] http://www.w3.org/TR/html5/browsers.html#scroll-to-fragid 
[2] https://html.spec.whatwg.org/multipage/interaction.html#sequential-focus-navigation-starting-point

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