SMRTR ProgrammingMay 5, 2025GitConnected

What Is the Virtual DOM, and Why Does It Make React So Fast?

SMRTR summary

React's Virtual DOM is a lightweight copy of the real DOM kept in memory. When app data changes, React updates the Virtual DOM, compares it to the previous version, and efficiently updates only the necessary parts of the real DOM. This approach minimizes browser reflows and repaints, resulting in faster, smoother UI updates and enabling cross-platform rendering.

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