The concept of Virtual DOM is closely associated with React, but it is not specific to React. It is a concept and technique that can be utilized in other JavaScript frameworks and libraries as well.

  The idea of Virtual DOM is to create a copy of the actual DOM in memory, which then allows developers to make changes to this virtual representation of the DOM before applying those changes to the real DOM. This approach improves performance and efficiency by minimizing the number of direct manipulations to the actual DOM.

  React popularized the use of Virtual DOM with its implementation of a reconciler algorithm, which efficiently calculates and applies the differences between the virtual and real DOM. This reconciliation process helps React to update only the necessary parts of the DOM, resulting in better performance compared to directly manipulating the real DOM.

  However, other libraries and frameworks like Vue.js, Angular, and Ember also adopt the concept of Virtual DOM or similar mechanisms to achieve efficient updates to the UI. They may have different names for it, such as Vue's "Virtual Nodes" or Angular's "Change Detection Mechanism", but the underlying principle remains similar.

  In conclusion, while Virtual DOM is commonly associated with React, it is not exclusive to it. The concept can be found in other frameworks and libraries as well, each with their own implementation and optimizations.