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Programming in React JS React is a JavaScript library/framework for building fast and interactive user interfaces for the web applications as well as mobile applications. It is an open-source, reusable component-based front-end library. Access to the source code, modify the source code and reuse the source code. In a model view controller architecture, React is the "View" which is responsible for how the app looks and feels. It uses typical model view architecture. Did you know? React was created by Jordan Walke, who was a Software Engineer at Facebook. Jordan Walke, who was a Software Engineer at Facebook now Meta Corporation created the React programming language, used to write software programs like Mobile and Desktop Applications in May 29, 2013; 9 years ago. It was later approved as an International Standard by Ecmain 2002 and ISO in 2003. React can be used as a base in the development of single-page, mobile, or server-rendered applications with frameworks like Next.js. However, React is only concerned with state management and rendering that state to the DOM, so creating React applications usually requires the use of additional libraries for routing, as well as certain client-side functionality. React (also known as React.js or ReactJS) is a free and open-source front-end JavaScript library[3] for building user interfaces based on UI components. It is maintained by Meta (formerly Facebook) Let's see how React works in real-time. Let's go ahead and see how react works in real time. Consider a typical web application, say, Instagram. The entire UI of the web page is divided into several components. 1. Search Component. 2. Profile Description Component. 3. Stories Component. 4. Post image components - Post List Component - Single Post Component. components in React JS These components make the code easier to debug and always remain discrete. These components make development and maintenance of web application faster as multiple developers can work simultaneously on different components of the web application. React divides the UI into multiple components, which makes the code easier to debug, and each component has its own property and function. Now, let's see how React JS is so popular? 2. Why React JS? 1. React JS helps in the creation (easy creation) of dynamic web applications. 2. It also provides performance enhancements - there are several performance enhancement like what you've done and data binding. 3. React uses reusable components - this helps decrease the development time. 4. React is unidirectional data flow. 5. React JS also has small learning curve - like other frameworks like Angular and Ionic, React JS is very easy to learn. 6. React JS can be used for development of mobile applications. React recently released an extension called React Native that is used for developing Mobile Applications which is cross-platform compatible. 7. React has dedicated tools for easy debugging. Where is React JS used? React JS is a JavaScript library/framework for building fast and interactive user interfaces for variety of programs and applications. While it is extremely interactive, it is mainly used in three fields: - Web and Mobile Application Development. - Microsoft Windows Software Applications. - Game Application Development.