[wp-trac] [WordPress Trac] #53488: The `action` passed to jQuery.ajax is possibly `null`

[WordPress Trac]

#53488: The `action` passed to jQuery.ajax is possibly `null`
--------------------------+-------------------------
 Reporter:  ixkaito       |       Owner:  (none)
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  5.8
Component:  Widgets       |     Version:
 Severity:  normal        |  Resolution:
 Keywords:  has-patch     |     Focuses:  javascript
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Comment (by zieladam):

 It seems like `action` is explicitly set to `null` here:

 https://github.com/WordPress/wordpress-
 develop/blob/master/src/js/_enqueues/wp/customize/selective-
 refresh.js#L773-L776

 That code hasn't changed for last 5 years so it sounds like we're just
 triggering an unhappy path introduced in this commit:

 https://github.com/WordPress/wordpress-
 develop/commit/39ecd7846d24f5dd46833b68c6cb90dcdc070398

 Given that context, Kai's fix looks good to me.

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Ticket URL: <https://core.trac.wordpress.org/ticket/53488#comment:4>
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