Answer
DOM nodes attach to the hostFiber. During commit, React updates props/events without destroying nodes.
Quick Answer
During commit, React walks the work-in-progress fiber tree and matches each fiber to an existing DOM node. If the fiber's type and key match the current DOM node, React updates it in-place (reuses the node). If they don't match, React removes the old node and inserts the new one. DOM node reuse minimizes browser layout recalculation.
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SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ