An Introductory Guide to ReactJS

ReactJS in a nutshell is a highly influential, hugely popular tool for web application development with a thriving

ReactJS in a nutshell is a highly influential, hugely popular tool for web application development with a thriving community. Created by Jordan Walke, a software engineer at Facebook, React is an open source, JavaScript library to build user interfaces primarily for single-page applications. Though many see it as a framework, it’s essentially just a library that allows developers to use reusable components to develop interactive UIs. But this alone makes it as good as a full-fledged framework.

With the brief introduction of ReactJS out of the way, let’s delve deeper into its features to understand why it’s special.

Virtual DOM

A notable feature of the JavaScript library is the virtual DOM (Document Object Model) feature where React creates an in-memory data structure cache to keep a virtual representation of the UI that can sync with the real DOM i.e. it keeps a record of various elements and content as objects and properties. Virtual DOM also renders simplified platform so app updates would be much more convenient and easier. An added benefit is a boost in application speed; courtesy of virtual DOM.

One-way Data Binding

ReactJS only approves data that are flowing in a single direction i.e. if the data are flowing downstream, in a single flow. If the data have to flow in a different direction, additional features would be required. This is why many developers see React as a reliable origin for canonical data sources. This is also why React is widely preferred as a front-end library to create highly interactive applications.

An added benefit is that as the data won’t be flowing in a different direction, they would be less prone to errors, and debugging would be much easier.

React Native

In 2015, Facebook announced React Native – a mobile application framework that enables native iOS, Android, and UWP app development with React. The framework comprises UI components to develop JavaScript code. The working principles of React Native are quite similar to React. However, React Native doesn’t manipulate DOM with virtual DOM, and runs in a background process instead, and not on the end-device. An asynchronous, batched Bridge enables React Native’s communication with the Native platform. React Native also doesn’t use HTML.


JSX or JavaScript XML is the syntax used by React which is as simple to read as English. However, despite being easy to read, JSX greatly resembles HTML. Like the name suggests, JSX is a combination of JavaScript and XML designed to make writing React components easier. It does this by making the syntax React developers use for generating HTML strings almost similar to the HTML they add into a web page.

Thriving Community

Being a widely popular open source tool, React is backed by a big community – including Facebook, Instagram, and experts in the wider open source community. The community constantly strives to improve React and the mobile experience it can offer, and is quick to respond when it comes to solving publicly posted technical issues and complexities.


ReactJS facilitates server-side rendering which means the JavaScript application is rendered on the server instead of in the browser thus improving the speed of the site significantly. A faster-loading site with an enhanced user experience granted by React translates to higher search engine rankings and consequently greater traffic and increased revenue. This is one of the reasons why IT experts in many companies prefer approaching an application development company with expertise in ReactJS app development.

Component Reusability

All components of React are isolated which means any change in one component won’t affect another component. Add to this React’s component reusability feature, and the developers get a number of great benefits. Reusable React components would be particularly useful for companies with a tight budget for application development. They can resolve many issues by themselves and save on maintenance costs as well. In addition, reusable components also make programming much more precise and comfortable for developers thus reducing complexity while completing app development faster.


ReactJS developers who have been working with the technology since its inception can vouch for the fact that the library uses progressive technology for faster, more comfortable web application development. Emphasizing the value of ReactJS in the web development industry is its growing dominance in front-end development. React is already touted as the future of JavaScript, and a great stepping stone for rookie developers who are new to app development with React. It’s easy to learn, efficient, and backed by experts.

If you are thinking about investing in a business application, consider developing one with React. Get in touch with AOT’s ReactJS experts to learn more.