The Virtual DOM (VDOM) represents a method used in web development, associated with JavaScript libraries and frameworks like React, to optimize the updating of webpage content. It creates an in-memory representation of the Document Object Model (DOM), thus allowing more efficient updates and minimizing the impact of dynamic changes. Although the concept is widely used in React and Angular frameworks, it is considered an unnecessary layer in vanilla-JS applications due to their more efficient and direct way of updating the UI.
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