Top 3 features in React Js

React Js features

React JS is a popular front-end JavaScript library that has gained widespread adoption due to its simplicity, performance, and scalability. In this article, I will discuss the top 3 features of React JS and provide code examples of how they work.

1. Virtual DOM:

The Virtual DOM is one of the most important features of React JS. It is a lightweight representation of the actual DOM, which is used to improve the performance of web applications. When a user interacts with a React-based application, the Virtual DOM compares the current state of the application with the previous state and updates only the components that have changed.

Let us consider an example of a simple application that displays a list of items. The application has a button that adds a new item to the list. In traditional web applications, adding a new item to the list would require updating the entire DOM, which can be slow and inefficient. However, with React JS, only the Virtual DOM is updated, which reduces the amount of work that the browser has to do, resulting in faster application performance.

Below is an example of how the Virtual DOM works in React JS:

class MyComponent extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      items: ["item1", "item2", "item3"]
    };
  }
handleClick = () =>…