Answer
React uses a virtual DOM to batch updates and apply only necessary changes to the real DOM. This reduces reflow and repaint costs, making UI updates efficient and predictable.
Quick Answer
Direct DOM manipulation is slow and error-prone — every change triggers browser reflows and repaints. React introduces a virtual DOM: you describe what the UI should look like, React figures out the minimal set of real DOM updates needed. Your code stays clean; React handles the expensive DOM work efficiently.
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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