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Virtual DOM, reconciliation, diffing, and why React feels fast

React compares virtual tree snapshots, reconciles differences, and updates the real DOM only where needed.

React Medium Theory

Virtual DOM, reconciliation, diffing, and why React feels fast

React compares virtual tree snapshots, reconciles differences, and updates the real DOM only where needed.

  • Virtual DOM is an in-memory representation
  • Reconciliation decides what changed
  • Diffing avoids blind full-DOM replacement
#performance #react #virtual-dom

Virtual DOM, reconciliation, diffing, and why React feels fast