Shulou(Shulou.com)05/31 Report--

This article mainly introduces "what is the function of react virtual dom". In daily operation, I believe that many people have doubts about the role of react virtual dom. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful to answer the doubts of "what is the function of react virtual dom?" Next, please follow the editor to study!

In react, virtual dom is used to update dom elements in pages efficiently; virtual dom can add up all dom operations, calculate all the changes, and update dom once, which can greatly improve performance and enable cross-domain applications (React Native) to achieve.

The operating environment of this tutorial: Windows10 system, react17.0.1 version, Dell G3 computer.

What is the use of react's virtual dom

What is a virtual DOM in react?

Is a concept in the framework where programmers use JS objects to simulate DOM and DOM nesting on pages

What is the purpose of virtual DOM?

In order to achieve efficient updates by DOM elements in the page

In traditional Web applications, we often update the changes of data to the user interface in real time, so every small change of data will cause the re-rendering of the DOM tree.

The purpose of virtual DOM is to add up all the operations, calculate all the changes statistically, and update the DOM uniformly.

Greatly improved performance

It enables cross-end applications (React Native) to be implemented. On the browser side, the virtual DOM is converted into browser DOM nodes. It can also be converted into a component of the native application, and the cross-segment application is implemented.

The difference between DOM and Virtual DOM

1. Virtual DOM will not perform typesetting and redrawing operations.

2. Make frequent changes to the virtual DOM, and then compare and modify the parts of the real DOM that need to be changed at once (pay attention! ), and finally typesetting and redrawing in the real DOM to reduce the loss of typesetting and redrawing of too many DOM nodes

3. The efficiency of frequent typesetting and redrawing of real DOM is quite low.

4. Virtual DOM can effectively reduce the redrawing and typesetting of large areas (real DOM nodes), because in the end, it is different from the real DOM, so you can only render part of it.

At this point, the study on "what is the role of react virtual dom" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.