
The _Virtual DOM_ works in three simple steps.

1. Whenever any underlying data changes, the entire UI is re-rendered in Virtual DOM representation.

![vdom](/questions/react/25/25-1.png)

2. Then the difference between the previous DOM representation and the new one is calculated.

![vdom2](/questions/react/25/25-2.png)

3. Once the calculations are done, the real DOM will be updated with only the things that have actually changed.

![vdom3](/questions/react/25/25-3.png)


How Virtual DOM works?

React is an open-source frontend JavaScript library which is used for building user interfaces especially for single page applications.

What is React?

In this article you will find out how to trigger click events in ReactJS using HTML component method provided by ref

How to programmatically trigger click event in React?

In React, props and state are two concepts that are often used together to manage data within a component.

Understanding the Differences Between Props and State in React

The push() and replace() methods of the history object can be used to manipulate the browser's history stack and create a seamless user experience.

What is the purpose of push() and replace() methods of history object?

In this answer, we show you how to use the JSON.stringify() method in React to convert a JSON object into a formatted string that is easy to read.

How to pretty print JSON with React?

Learn how to use the setInterval() method to update a component in React every second. This step-by-step guide of how to use the useEffect() set up the interval.

How to update a component every second in ReactJS?

To pass parameters to the history.push method, you can use an object to specify the route to push to and include any parameters of that object.