React JS is a JavaScript framework that allows you to build applications quickly. It offers a lot of functionality and is easy to use. You can use it to develop web and mobile applications.

To develop a React application, you need to create a set of reusable components. Each component is responsible for rendering a small reusable piece of HTML. The components can be written in two ways: as class components or as function components.

Unlike a traditional web application, a React application uses a declarative paradigm. This means that each component has its own set of functions and properties. In this way, you don’t have to write complex code to control the state of the component.

As you interact with the interface, the state of the component changes. This helps to improve performance and make the application more stable. When you update a component, the virtual DOM will find the most efficient way to update the browser’s DOM.

You can also use React to add new UI components to existing applications. For example, you can include a button to subscribe. That button will receive updates to its values from a sub that calls a setState method.

React is a JavaScript framework that offers a lot of functionality and is easy for beginners to use. Many companies have adopted React JS for their websites and mobile applications. There are a number of tutorials, a good library of documentation and training resources to help you learn.

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