ReactJS offers graceful solutions to some of front-end programming’s most persistent issues, allowing you to build dynamic and interactive web apps with ease. It’s fast, scalable, flexible, powerful, and has a robust developer community that’s rapidly growing.



Features of ReactJS

  • The Virtual DOM
The document object model or DOM manipulation is one of the most important parts of the web. But updating the DOM is very slow. instead of updating the whole DOM, these frameworks should update only the part of DOM that is required to update. This is what the virtual DOM does. The virtual DOM is a lightweight copy of the original DOM. It has all the properties of the real DOM. When the update is made, the whole virtual DOM is updated. This sounds inefficient but virtual DOM is much faster than the original one. After the update is complete, ReactJS compares the updated virtual DOM and the pre-updated original DOM. This is known as Diffing. After comparing both the DOMs, ReactJS exactly knows where is the difference. So it updates the original DOM only where the difference was.

This is why ReactJS’s DOM manipulation is much faster than other frameworks.


  • One-Way data flow
React apps are organized as a series of nested components. These components are functional in nature: that is, they receive information through arguments and pass information via their return values. This is called unidirectional data flow. Data is passed down from components to their children.


  • JSX
JSX is the extension of javascript syntax. Its syntax is similar to HTML. ReactJS components are written in JSX. JSX can be seen as a combination of javascript and XML. Its syntax is very simple that makes writing components very easy.





Pros of ReactJS

  1. ReactJS uses virtual DOM that makes the user experience better. It also makes the developer’s job less complex.
  2. JSX is used in ReactJS which is very simple and easy to learn. 
  3. There is no need for separate files for logic and markup in ReactJS.
  4. ReactJS is an open-source library that is maintained by Facebook. It is a constantly developing library.
  5. The one-data binding makes the code very stable.

Cons of ReactJS

  1. It needs additional libraries for routing, state management, and API interaction.
  2. ReactJS is a large size library.
  3. The pace of development is very high. 
  4. ReactJS only covers the UI part, nothing else.