[wp-trac] [WordPress Trac] #60311: Editing interface prompts error

[WordPress Trac]

#60311: Editing interface prompts error
---------------------------+------------------------------
 Reporter:  chengjianping  |       Owner:  (none)
     Type:  defect (bug)   |      Status:  new
 Priority:  normal         |   Milestone:  Awaiting Review
Component:  General        |     Version:
 Severity:  normal         |  Resolution:
 Keywords:                 |     Focuses:
---------------------------+------------------------------

Comment (by ermiuyo):

 Replying to [comment:3 ermiuyo]:
 > Replying to [comment:2 ermiuyo]:
 > > 1. The component tree has changed, but React still holds references to
 old nodes.
 > > 2. A missing or incorrect key in a list causes React to misidentify
 elements.
 > > 3. Conditional rendering removes elements unpredictably.
 > > 4. Directly manipulating the DOM instead of relying on React’s virtual
 DOM.
 > Make sure the parent component exists before inserting a child element.
 If using refs, validate them before modifying the DOM.
 >
 >
 > {{{
 > useEffect(() => {
 >   if (parentRef.current) {
 >     // Safe operations
 >   }
 > }, []);
 >
 > }}}

 If the component is being unmounted or re-rendered unexpectedly, React may
 lose track of the parent-child relationship. This can happen when you're
 using React's lifecycle methods incorrectly or when elements are
 conditionally rendered based on state changes.

 Fix:
 Ensure that the component is mounted correctly before making any updates.
 Use useEffect() with proper dependencies to track changes and handle side
 effects, like this:


 {{{
 useEffect(() => {
   if (parentRef.current) {
     // Safe DOM manipulations when the component is mounted
   }
 }, [someDependency]);  // Ensure that the dependency array is correct


 }}}

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Ticket URL: <https://core.trac.wordpress.org/ticket/60311#comment:4>
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