ReactJS is a very popular frontend web development open-source library for developers today. Once you are comfortable with it, the experience of writing a web application becomes easy and enjoyable.


Jordan Walke created ReactJS in 2011 when he was working as a software engineer at Facebook. In 2013, Facebook made ReactJs open-sourced. In 2015, Facebook released React Native for frontend development on mobile applications. Currently, ReactJS is the most popular JavaScript library for building user interfaces.


This JavaScript library is used to build fast and interactive user interfaces for web and mobile applications. It is an open-source reusable component-based frontend library. It’s used specifically for large, complex web interfaces and single-page applications.


ReactJS divides the UI into multiple independent components and then composes them to build the complex user Interfaces. These components are the heart of all ReactJS applications. Which makes code easier to debug, and each component has its own property and function. These components also make the development and maintenance of the web application faster because multiple developers can work simultaneously on different components in the same web application.


These components can be reused multiple times across the application. This reduced the development time. The component is typically implemented as a JavaScript class with some state and render methods in terms of implementation.


  • State: Data which we need to display when component rendered
  • Rendor Methods: Describe how the UI looks and feels to the user


In the model view controller (MVC) design pattern, ReactJS is the “View” responsible for how the app looks and feels. So ReactJS gives you a way to structure the view layer of your application.




We also don’t have to separate our markup from our logic because ReactJS uses JSX ( JavaScript Syntax Extension ). JSX allows us to write HTML structures in the same file that contains the JavaScript code. We use JSX syntax in ReactJS to describe what the UI should be like.


The apps you build with ReactJS are very interactive because of virtual DOM ( Document Object Model ). The virtual DOM is only a virtual representation of the DOM, which is the exact copy of the real DOM. ReactJS keeps this lightweight representation of the DOM in memory. Every time the state of our object changes, the virtual DOM changes only that object in the real DOM  instead of updating all the objects. This allows us to update parts of the page that need to be updated without reloading it.


To date, more than 2 million websites are built using ReactJS, and there’s no sign of stopping. According to Google trends, ReactJS had a  better growth scale than other frameworks like Angular and Vue. Netflix, Facebook, Instagram, and Reddit are recognizable companies using ReactJS in their applications.


Not only it’s the preferred tool by top companies, but ReactJS also has a massive active community.


  • GitHub Repository – has 181K star / 1524 contributors/ Among the top 5 trending repositories
  • NPM Package – has more than 10 million downloads.
  • StackOverflow – Over 250k questions asked about React


ReactJS is easy to learn compared to other frameworks like Angular. Also, there is well-organized documentation available online that will help you learn everything related to ReactJS within a short period. If you have basic knowledge and familiarity with JS and HTML, you are good to start coding with ReactJS.


ReactJS offers you a great developer experience with flexible functionality and is the perfect choice for developers looking for a JavaScript framework. It is simple, efficient, clean, and saves significant time from development.