[wp-trac] [WordPress Trac] #32783: Ajax issue in the customizer when previewing a different theme

[WordPress Trac]

#32783: Ajax issue in the customizer when previewing a different theme
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 Reporter:  Fab1en                      |      Owner:
     Type:  defect (bug)                |     Status:  new
 Priority:  normal                      |  Milestone:  Awaiting Review
Component:  Customize                   |    Version:  4.1
 Severity:  normal                      |   Keywords:
  Focuses:  javascript, administration  |
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 When a theme is activated, and another one is previewed using the
 customizer live preview, ajax requests are run against the old theme, not
 the one being previewed.

 The easiest way to see this issue is to use the Header Image cropping
 function included in core.

   1. Install and activate a theme that has no `custom-header` feature (for
 example [https://wordpress.org/themes/modern-estate/ Modern Estate])
   2. Go to the customizer, click on the change button to choose a new
 theme (for example, TwentyFifteen
   3. Use the Header Image panel to select and crop an image
   4. You get the following error : `There has been an error cropping your
 image.`
   5. Activate TwentyFifteen and crop the same image again : error has
 disappeared

 If a theme defines specific ajax actions, those actions will not be
 available in the live preview until the theme is really activated.

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Ticket URL: <https://core.trac.wordpress.org/ticket/32783>
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