[wp-trac] [WordPress Trac] #63011: Customizer: The back button is not keyboard focusable

[WordPress Trac]

#63011: Customizer: The back button is not keyboard focusable
--------------------------+----------------------------
 Reporter:  wildworks     |       Owner:  joedolson
     Type:  defect (bug)  |      Status:  accepted
 Priority:  normal        |   Milestone:  6.9
Component:  Customize     |     Version:  3.4
 Severity:  normal        |  Resolution:
 Keywords:  has-patch     |     Focuses:  accessibility
--------------------------+----------------------------

Comment (by wildworks):

 @abcd95 Sorry, my feedback was not correct.

 I tried to find out which changeset this problem occurred in. As a result,
 I identified that r59224 caused this problem.

 It is probably correct that the back button has a initial setting of
 `tabindex="-1"`. This button should be dynamically applied `tabindex="0"`
 via JS code and should be expected to be focusable. However, r59224 seems
 to have removed the logic.

 For example, I found that the following changes could solve this issue by
 restoring some code. However, simply restoring a single line may not be
 enough:

 {{{
 diff --git a/src/js/_enqueues/wp/customize/controls.js
 b/src/js/_enqueues/wp/customize/controls.js
 index 7a6e69cf3e..14d3e63d0c 100644
 --- a/src/js/_enqueues/wp/customize/controls.js
 +++ b/src/js/_enqueues/wp/customize/controls.js
 @@ -1615,6 +1615,7 @@
                                 } else {
                                         expand = function() {
 section._animateChangeExpanded( function() {
 +                                                       backBtn.attr(
 'tabindex', '0' );
                                                         backBtn.trigger(
 'focus' );
                                                         content.css(
 'top', '' );
 container.scrollTop( 0 );
 }}}

 @joedolson Could you confirm whether the code removed in r59224 was
 intentional?

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Ticket URL: <https://core.trac.wordpress.org/ticket/63011#comment:11>
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