Features of React JSX - JavaScript Syntax Extension. JSX is a syntax extension to JavaScript. ... Virtual DOM. React keeps a lightweight representation of the “real” DOM in the memory, and that is known as the “virtual” DOM (VDOM). ... Performance. ... Extensions. ... One-way Data Binding. ... Debugging. ... Components. ... State.What are the benefits of react? Benefits of ReactJS: Top 10 Reasons to Choose It #1 ReactJS simplifies the overall process of scripting components. ... #2 It facilitates advanced maintenance and boosts productivity. ... #3 It guarantees quicker rendering. ... #4 ReactJS offers a more stable code. ... #5 ReactJS is SEO friendly. ... #6 React JS comes with helpful developer toolset. ... #7 React framework for mobile app.What is special about react? React creates an in-memory data structure cache which computes the changes made and then updates the browser. This allows a special feature that enables the programmer to code as if the whole page is rendered on each change whereas react library only renders components that actually change.What is ReactJS used for? React (also known as React. js or ReactJS) is an open-source, front end, JavaScript library for building user interfaces or UI components. It is maintained by Facebook and a community of individual developers and companies. React can be used as a base in the development of single-page or mobile applications.