React is framework of JavaScript. JavaScript is a scripting or programming language that allows you to implement features on web pages — every time a web page does more than just sit there and display static information for you to look at — displaying timely content updates, interactive maps, animated 2D/3D graphics, scrolling video jukeboxes, etc. — you can bet that JavaScript is probably involved. Suppose we made a car than the skeleton of car is made by using html, Than we want to design that car at that time we use CSS for designing and if we want to implement features on web pages than we use JavaScript for implementing features. JavaScript is a scripting language that enables you to create dynamically updating content, control multimedia, animate images, and pretty much everything else. (Okay, not everything, but it is amazing what you can achieve with a few lines of JavaScript code.). JavaScript can calculate manipulate and validate data. JavaScript is most commonly used to create dynamic, interactive websites. Developers use JS to add animations, pop-up windows, search bars, buttons, audio and video, chat widgets, and other interactive elements to a webpage. You can also use JS to provide real-time updates to a page without reloading it. For example, websites with news tickers, stock or crypto prices, or real-time product availability information typically use JavaScript to add this functionality. We can use JavaScript to make games. Overview of JavaScript React is a framework that employs Webpack to automatically compile React, JSX, and ES6 code while handling CSS file prefixes. React is a JavaScript-based UI development library. Although React is a library rather than a language, it is widely used in web development. The library first appeared in May 2013 and is now one of the most commonly used frontend libraries for web development.