[wp-trac] [WordPress Trac] #40954: Create Category within posts screen error

[WordPress Trac]

#40954: Create Category within posts screen error
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 Reporter:  cfastenrath        |       Owner:  (none)
     Type:  defect (bug)       |      Status:  closed
 Priority:  normal             |   Milestone:
Component:  Posts, Post Types  |     Version:  4.8
 Severity:  normal             |  Resolution:  invalid
 Keywords:  close              |     Focuses:  javascript
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Comment (by hamzadevpro):

 **Explanation:
 ****Type Checking:** Checks if a and b are defined and of the same type
 (constructor).
 **Array Handling:** Verifies if a and b are arrays before attempting to
 copy elements.
 **Fallback for Undefined or Null:** If b is null or undefined, a will
 simply be set to b, preserving its original value.
 This way, the function gracefully handles cases where the AJAX response
 might be null or undefined, avoiding errors when attempting to access
 properties.

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Ticket URL: <https://core.trac.wordpress.org/ticket/40954#comment:5>
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