[wp-trac] [WordPress Trac] #31964: Use a replaceable function for the beforeupload handler with shiny updates

[WordPress Trac]

#31964: Use a replaceable function for the beforeupload handler with shiny updates
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 Reporter:  DavidAnderson                   |      Owner:
     Type:  defect (bug)                    |     Status:  new
 Priority:  normal                          |  Milestone:  Awaiting Review
Component:  Upgrade/Install                 |    Version:  trunk
 Severity:  normal                          |   Keywords:
  Focuses:  ui, javascript, administration  |
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 In #31819, I proposed changing the anonymous function used for the
 beforeunload handler in shiny updates (which is used for the "Are you
 sure?" alert).

 The attached does two things:

 1) Uses a replaceable function instead of an anonymous one, allowing
 plugins to hook in and adapt the process. (I have a use case for this).

 and

 2) Triggers an wp-plugin-shinyupdates-loaded event, so that plugins can do
 this at an appropriate time.

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Ticket URL: <https://core.trac.wordpress.org/ticket/31964>
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