[wp-trac] [WordPress Trac] #28890: Customizer - Widgets - Inactive 'Add a Widget' button can still get focus when using screen reader

[WordPress Trac]

#28890: Customizer - Widgets - Inactive 'Add a Widget' button can still get focus
when using screen reader
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 Reporter:  GrahamArmfield  |      Owner:
     Type:  defect (bug)    |     Status:  new
 Priority:  normal          |  Milestone:  Awaiting Review
Component:  Customize       |    Version:  trunk
 Severity:  normal          |   Keywords:
  Focuses:  accessibility   |
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 Tested with NVDA on FF30 and JAWS on IE10, on Windows 7 64 bit.

 To recreate:
 - Start your screen reader
 - Tab into Customize > Widgets
 - Tab to sidebar that has widgets within it and press Enter to open.
 - Tab to the Reorder button and press Enter.
 - Reverse tab once - focus is now on Add a Widget button and screen reader
 announces it. Visual indication implies that this button is inactive.
 Pressing enter key gives no result.

 Suggest that when this button is inactive it is removed from tab order by
 removing the tabindex="0".

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Ticket URL: <https://core.trac.wordpress.org/ticket/28890>
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