[wp-trac] [WordPress Trac] #63531: Category dropdown does not meet WCAG 2.2 A on windows and some linux systems

[WordPress Trac]

#63531: Category dropdown does not meet WCAG 2.2 A on windows and some linux
systems
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 Reporter:  adrock42      |      Owner:  (none)
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Widgets       |    Version:
 Severity:  normal        |   Keywords:
  Focuses:                |
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 Using WP 6.8.1 on Windows 11 with up-to-date browsers in a brand new local
 WP build spun up  for testing

 1. create a website using WordPress
 2. create some post categories
 3. create some posts and assign the posts to the categories

 when using blocks
 4. add a categories block to a template

 when using the classic widgets plugin
 4. add the categories widget to a side bar

 5. in Windows chrome or Firefox, or linux chromium navigate to the
 frontend page where the categories widget or block lives.
 6. Using a keyboard, tab to the categories dropdown (<select>) and hit
 enter to display the dropdown options
 7. Click arrow down to select an option
 8. Click escape

 at this point the user is taken to the page of the category that was
 selected
 to meet the WCAG criterion, the user should remain on the same page and
 the option cleared.

 WCAG mentions Success Criterion 3.2.2 On Input
 Changing the setting of any user interface component does not
 automatically cause a change of context unless the user has been advised
 of the behavior before using the component.

 here is an example of a similar failure https://www.w3.org/TR/2016/NOTE-
 WCAG20-TECHS-20161007/F9

 Keeping the currently selected option and not removing the selection seems
 like an OS-Specific behavior.  I am not observing this behavior on OSX,
 but I do see it on Windows in chrome and firefox and in elementary OS in
 chromium

 this appears to all come from the JS injected here
 https://github.com/WordPress/WordPress/blob/master/wp-
 includes/blocks/categories.php#L100
 https://github.com/WordPress/WordPress/blob/master/wp-includes/widgets
 /class-wp-widget-categories.php#L99

 possible fixes are a big ole "GO" button (ick), or clearing the selection
 before the select.onChange is dispatched

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Ticket URL: <https://core.trac.wordpress.org/ticket/63531>
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