文檔對象模型(DOM)的編程接口HTML和XML文檔。它代表一個文檔對象樹的結構,與每個對象代表一個文檔的一部分(比如元素或屬性)。DOM允許程序訪問和修改文檔的內容和結構。
虛擬DOM是一個概念,介紹了反應,它是一個輕量級內存中表示實際的DOM。當呈現應用程序的反應時,虛擬DOM創建了一個虛擬的DOM樹表示,然後使用它來確定最小數量的變化,需要實際的DOM以更新用戶界麵。

這個DOM更新DOM通過虛擬的過程被稱為“和解”。When the virtual DOM determines that a change needs to be made to the actual DOM, it creates a new virtual tree that represents the updated state of the user interface, and then it compares the new tree to the previous tree to determine the minimal set of changes that need to be made. When the state of a React component changes, the virtual DOM is updated instead of the actual DOM. This allows React to determine the minimal set of changes that need to be made to the DOM, which can greatly improve the performance of applications with large amounts of data that rely on frequent updates.
總的來說,虛擬DOM在反應是一個重要的概念,因為它有助於更容易建立和維護有效的和高性能的用戶界麵。