7 Key Advantages of ReactJS
Tags: react, webdev
Published: 2022-09-22 19:31:08

ReactJS expanded is React Java Script. Just like flour, milk, and sugar combine together to make your birthday cake, ReachJS makes the user interfaces of applications you use every day, like Instagram and Netflix.

Among developers, [ReactJS developers](https://skeintech.com/hire/hire-react-native-developers/) has become huge due to its technical merits. Since major tech companies of the world use it in some form to code their software and applications, there is no additional need to justify its popularity. But we will look into some of the key advantages later. Let us first understand what is React JS.

## What Is ReactJS?

ReactJS is an interface-building library for JavaScript. It was initially built by Facebook in 2011 and was later used to make Instagram as well. 

Developers use it to create web applications using data that change over time without page reloading. The central idea behind ReactJS is Virtual DOM.
Here, DOM stands for document object model. To put it simply, it represents a tree-structured HTML element that is found in a webpage or an application. Virtual DOM functions as a lightweight replica of real DOM. DOM manipulation takes time, but virtual DOM manipulation happens quickly.

And as a result, virtual DOM, rather than real DOM, is updated first whenever the state of your application changes. This is why the apps that utilize ReactJS use data without having to reload the page.

## Features of ReactJS

React is a front-end component-based open-source library. The UI layout of applications is created by React by breaking up the code into components, making it simpler to debug. There are various other [features of ReactJS](https://www.javatpoint.com/react-features), as discussed below:

## 1. Virtual DOM

[DOM](https://reactjs.org/docs/faq-internals.html) executes the code and separates it into modules, making it the most crucial component of the web. Virtual DOM manipulation as compared to real DOM happens quickly and is updated first whenever the state of the application changes.

In the figure below, when the entire virtual DOM is altered, the child components change. As a result, DOM now detects differences and updates only the altered portion.

## 2. JSX (Java Script Syntax Extension)

It is a combination of HTML and JavaScript. It makes codes easy and understandable. 
One-way data binding

It means data flows in one direction, from top to bottom, or from parent components to child components. As a result, everything remains fast and modular.

## 3. Extensions

React's various extensions can be utilized to build UI applications with attractive user interfaces, which are enhanced with Flux, Redux, React Native, and other features.

## 4. Conditional statements

We can create conditional statements using JSX. According to the conditions specified inside the JSX, the data in the browser is presented.

## 5. Components

As ReactJS is component-based, it divides webpage into various components. Each component makes up the user interface design and has its own logic and layout. Therefore, component logic that is written in JavaScript is simple, runs quickly, and can be reused.

## Why ReactJS Is Used for Web Development?

As React is a component of JavaScript language, it in itself has a lot of benefits. JavaScript is used by programmers to create sophisticated interactive webpages and browser games as well as to connect servers to websites and web applications.

As only one language is used for the client, server, and mobile sides of React-built products, it results in excellent efficiency. The code is used to create an interface that is readable and maintainable. There are teamwork-friendly workflow patterns. Let’s look at some of its advantages due to which it is vastly used in web development. 

## 7 Key Advantages of ReactJS

Let's take a close look at some key advantages of using ReactJS. More importantly, when to use ReactJS to accomplish the most suitable goals and deliver excellent results.

## 1. Virtual DOM reinforces high performance

React has incredibly quick rendering capabilities with all view changes being instantly reflected in the virtual DOM by virtualizing and keeping DOM in memory.

The customized diff approach examines prior and present virtual DOM states to ascertain the most efficient way to make changes, while requiring the fewest updates possible.

The fastest read/write time is then achieved by introducing a minimum amount of updates, which improves overall speed. 

Internally and independently, or "behind the scenes," all virtual DOM modifications are handled, which also significantly lowers the number of hardware resources consumed, such as CPU power and battery consumption. 

## 2. Extended HTML syntax in JSX

You may use declarative HTML syntax right in JavaScript code, thanks to ReactJS. Browsers decode HTML content in order to render the user interface.
They accomplish this by constructing DOM trees, which may then be modified using JavaScript to produce interactive user interfaces. By introducing HTML and ReactJS components into the browser's tree structures, developers may create clean, maintainable code. 

The Virtual DOM and JSX make ReactJS apps much quicker and more effective. With JSX, additional frameworks and libraries can also be used.

## 3. Mature, understandable development workflow

The library’s eventually optimized coding language and development interface are among the primary justifications for using ReactJS for web development. Lightweight React's API is improved with swift performance characteristics to enable a smooth and quick development approach. As React's concepts and components are so easy to grasp, there isn't much experience of learning involved. 

Eventually, React provides considerably cleaner, readable, and more thorough code by inserting JSX into JavaScript.

## 4. Extremely flexible and compatible

Once you get the feel of ReactJS, you can simply reuse it through numerous platforms.

A significant contribution is also made by the sizable, long-standing community.
The present ecosystem of ReactJS is so big that programmers can build mobile applications, and websites, take care of server use and include forefront technology (such as VR) utilising the same concepts, online solutions, and more.

## 5. Component reuse without hassle

One of the main features of ReactJS is creating separate components. For this reason, created components are simple to reuse. When you create a ReactJS website element, you receive a special object which can be included in other projects that use React codes.

Each of these components has its own underlying logic and rendering foundation despite being organized into a bigger broader hierarchy. 

This has significant scaling potential, helps React online apps achieve considerably more consistency, and simplifies additional support and improvement.

## 6. Multiple toolsets available

Excellent toolset and tech stack are emphasized to explain why we use React JS for website building. 

Both the Redux development tools and developer tools of React are quite user-friendly, and these can be downloaded and used just like any other regular Chrome extension. You can effectively analyze React-based components with their corresponding states and props, check operations of dispatch, and view changing states right away in the extension. 

## 7. Vast resources for defining communities and markets

Some of the biggest communities out there, back React and are favored by a lot of Fortune 500 organizations, including Netflix, Amazon, Airbnb, and Uber among others. It is one of the top five repositories on GitHub (above 160K stars overall). 

The fact that it is actively supported by professionals who are directly involved in Facebook’s software system should be sufficient justification in and of itself to adopt ReactJS for website building. 

## 5 Applications that Use ReactJS

- Facebook

It's interesting to note that Facebook is where the ReactJS library was first developed, and thus, it makes sense for the app to use it. React Fiber is currently in beta and was completely rewritten by Facebook. The mobile app was also created using React Native, a comparable form of React that shows iOS and Android native components rather than DOM elements.

- Instagram

Instagram is totally based on the ReactJS library, allowing users to fully adapt to its exceptional capabilities. Numerous features, like geolocations, Google Maps APIs, accurate search results, and tags that don't use hashtags, are proof of this.
It's fantastic to see that everything is covered by the app’s API.

- Netflix

The key reason for Netflix to choose React is its startup speed, modularity, and runtime performance.

- DropBox

ReactJS was adopted by Dropbox over a year ago, precisely when app developers started to use React a lot more.

- Khan Academy

A lot of elements of Khan Academy are based on React presently. They updated from the previous conventional backbone script mainly because of React’s efficient element changing and the removal of pointless re-renders.

## Conclusion

ReactJS is already revolutionizing the software development world due to its immense advantages, including hassle-free component reuse, smooth dev workflow, high-performance utilization of the Virtual DOM, flexibility, and compatibility.

These are also the reason why internet giants are switching to utilizing ReactJS in their app algorithms.