What are the major features of ReactJS?

ReactJS, a popular JavaScript library for building user interfaces, is known for its efficiency and flexibility. Here are the major features that contribute to its widespread adoption among developers:

1. JSX (JavaScript XML): JSX is a syntax extension that allows developers to write HTML-like code directly in their JavaScript files. This makes the code more readable and easier to write. JSX is not mandatory, but it is widely used because it visually resembles the layout of the interface that the code describes[1][2][5].

2. Virtual DOM: React uses a virtual DOM to enhance app performance. The virtual DOM is a lightweight copy of the actual DOM. This approach allows React to update only the parts of the DOM that have changed, instead of reloading the entire DOM whenever a single change occurs. This selective rendering improves the speed and efficiency of updates[1][2][3][5].

3. One-Way Data Binding: React implements a unidirectional data flow. This means that data has a single flow from parent to child components, which simplifies the control and predictability of the data state. It enhances the stability of the code and makes the behavior of the application more predictable[1][2][5].

4. Components: React is built around components. These are self-contained modules that encapsulate all the necessary logic and rendering instructions for a piece of the UI. Components can be reused throughout the application, which makes the code more manageable and the application more scalable[1][2][5].

5. Declarative UI: React allows developers to describe their interfaces in a dec...