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Update 2-ui/99-ui-misc/01-mutation-observer/article.md

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Co-authored-by: Muhammed Zakir <8190126+MuhammedZakir@users.noreply.github.com>
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@ -252,7 +252,7 @@ let mutationRecords = observer.takeRecords();
```
```smart header="Garbage collection interaction"
Observers use weak references to nodes internally. That is: if a node is removed from the DOM, and becomes unreachable, then it can be garbage collected.
Observers use weak references to nodes internally. That is, if a node is removed from the DOM, and becomes unreachable, then it can be garbage collected.
The mere fact that a DOM node is observed doesn't prevent the garbage collection.
```