Can a closure keep a detached DOM element alive in JavaScript?
Yes. If an event handler closes over a DOM element and the element is removed from the DOM, the handler keeps the element in memory. Remove the event listener when the element is removed.
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More FAQs in Closures and Garbage Collection in JavaScript
Closures keep their lexical environment alive, preventing the GC from freeing closed-over variables. This is useful for data privacy but can cause memory leaks if closures accumulate or keep large objects alive unnecessarily.
Accumulating handlers in an array, where each handler closes over a large object. As the array grows, each entry keeps its large object alive, and memory grows unbounded. Remove entries when no longer needed.
Remove handlers when done (removeEventListener, clearInterval), do not close over large objects unnecessarily (extract what you need), use WeakRef for optional references, keep closures short-lived, and null out references when no longer needed.
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