[wp-trac] [WordPress Trac] #25439: Prevent loss of unsaved customizer settings or provide means of restoring

[WordPress Trac]

#25439: Prevent loss of unsaved customizer settings or provide means of restoring
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 Reporter:  westonruter  |       Owner:
     Type:  enhancement  |      Status:  new
 Priority:  normal       |   Milestone:  4.0
Component:  Customize    |     Version:  3.4
 Severity:  normal       |  Resolution:
 Keywords:  needs-patch  |     Focuses:  javascript
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Comment (by westonruter):

 In [attachment:25439.1.diff] accounting for case where user navigates away
 (e.g. via going too far back in browser history) from `themes.php` while
 the `customize-loader` is open. What is not accounted for yet is
 preventing the user from going back one step from the theme preview back
 to the themes page. I have some drafted code not included in this patch,
 but it is tricky since the `popstate` event is not `cancelable`.

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Ticket URL: <https://core.trac.wordpress.org/ticket/25439#comment:6>
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