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Virtual DOM

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**Virtual DOM**

What is Virtual DOM?

The Virtual DOM (VDOM) is a programming concept where a virtual representation of a UI is kept in memory and synced with the real DOM. It's used in JavaScript frameworks like React, Vue.js, and others to improve performance by minimizing direct manipulations to the actual DOM. When changes occur, the VDOM is updated first, and then a 'diffing' algorithm efficiently calculates the minimal set of changes needed to update the real DOM, leading to faster and more efficient UI updates.

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