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React JS is a popular JavaScript library used for building user interfaces for web and mobile applications. But the question often asked is whether it is a client-side or server-side script. In recent years, React has gained a steadily increasing foothold in front-end development due to its resilient and versatile design. But is React only a client-side library or does it double as both a client-side and server-side script?
To begin with, what implications does each option have? How does React support different approaches used to build user interfaces? What are the challenges involved in developing an application with React as a server-side script?
React is becoming increasingly popular when it comes to building user interfaces for a variety of applications. This is largely due to its versatile framework that enables developers to create applications with minimal effort. However, it is important to note that React is largely a client-side library. Its server-side capabilities are limited and not as robust as its client-side ones.
The challenge faced when choosing React as a server-side script lies in the limitations of the library when it comes to leveraging back-end logic. React is limited in supporting existing server-side approaches, such as server-side rendered pages or non-server-side rendered pages. It’s essential that web developers are well-versed in their chosen server-side scripting language and can produce reliable and stable applications when React is used as a server-side script.
In this article, you will learn what React is used for, what the advantages and disadvantages are for using React as a client-side and server-side script, and what challenges you may face when developing an application with React as a server-side script. We will also explore some of the best practices when using React for server-side scripting and how it can help create better user experiences.Definitions:
React JS is a JavaScript library created by Facebook for building user interfaces. It can be used on the client-side, in the browser, and on the server-side, with Node.js. React is most commonly used for building user interfaces (UI) in applications, where it can be used to create lively and interactive user interfaces with dynamic data updates.
Server side code is code that runs on the web server. It is responsible for generating the HTML for the page that the browser displays. Server side code also handles requests from the browser, and interacts with databases, sending back the requested data. This type of code cannot directly interact with the user and their browser.
Client side code is code that runs in the browser of the user’s device. This code is responsible for taking the data from the server and giving the content a visual representation, like styling the page and running interactive actions triggered by user clicks or movement. The code runs within the browser, and is visible and inspectable.
React JS is a library of JavaScript code that can be used either server side, or client side. It allows developers to create rich user interfaces with dynamic data updates. Server side React code compiles HTML, and interacts with databases, while client side React code allows developers to turn data into a visual experience with interactive user interfaces.

1. What is React JS?

React JS: Simplifying Development of Interactive User Interfaces

Overview of React JS

React JS is an open-source, JavaScript library that provides a framework for creating user interfaces. It is often used for single page applications, and helps developers build complex user interfaces, with components that are easy to design, reuse, and maintain. React JS is a client-side script, which means that it is executed on the browser of a user’s device instead of the web server.

Ease of Use and Performance

React JS makes it easy for developers to create an efficient, high-performing user interfaces due to its out-of-the-box features such as virtual DOM, reusable components, and live updates. Virtual DOM is a virtual representation of the actual DOM that a web page contains. React JS keeps a copy of the virtual DOM and then uses it to render just the necessary parts of the interface when the user interacts with the application. This eliminates the need for developers to manually change each element of the DOM and prevents errors.
In addition, React JS allows developers to create reusable components which can be used multiple times to build an application. This significantly simplifies the development process while conserving resources. Furthermore, React JS has the ability to update a user interface in real time without reloading the page. This ensures that the user interfaces are always up to date when data changes.


  • Enables developers to create user interfaces quickly and efficiently.
  • The virtual DOM makes it possible to update elements of the interface without reloading the page.
  • js allows developers to create reusable components.
  • The use of components makes it easier to manage the codebase.
  • js is open source and thus has an active and engaged community behind it.

2. Features of React JS

React JS is a client side scripting language, used in developing interactive user interfaces. It is based on the JavaScript library, making it widely compatible with many other libraries and frameworks. It is one of the most popular front end development technologies.

React JS Features

React JS is a library for building user interfaces that provide a better, faster and easier user experience. It is component-based, meaning developers can encapsulate functionality and logic into individual components that are reusable across applications. Because of this, React JS helps developers to develop applications with greater modularity and at a faster rate. It also uses a virtual DOM structure to render components and update the UI whenever data changes, instead of forcing the developers to do it manually.

Data Binding

Data binding is a key concept when developing web applications. React JS features one-way data binding, which means that the UI elements are synced with the underlying data without having to explicitly specify any synchronization code. This allows developers to express their intent by simply attaching a value to a UI element and let React JS handle data synchronization for them. Furthermore, React JS supports two-way data binding, making it possible to update the model when the UI element changes.
React JS also features several optimization algorithms that help in making applications run faster. These algorithms kick in when the application gets updated and reduce the amount of unnecessary DOM manipulation, which can significantly improve application performance. Additionally, the library comes with several ready-made components and an extensive ecosystem of third-party components. Moreover, it also supports server-side rendering, which can help provide a better experience for users by pre-rendering certain parts of the application before it is loaded.

3. Advantages of React JS in Client Side Scripting

Advantages of React JS in Client Side Scripting

Component-based Architecture

React JS is a Java Script library for building user interface components. It allows developers to create reusable user interface components in a modular way. It uses a component-based architecture that allows developers to divide UI components into smaller, independent and reusable pieces of code, making it easy to maintain and extend. React JS uses a sophisticated virtual DOM (Document Object Model) system to keep track of changes made to user interface components. This enables developers to quickly render changes in the UI without reloading the page.

Quick Learning Curve

React JS is accessible to both beginner and experienced developers. It uses JavaScript and JSX, a combination of JavaScript and HTML, which is easier to learn than other traditional web development languages. This makes it an ideal language for those who are beginning their development journey. React JS also comes with extensive documentation and tutorials making it even more accessible.

Improved Performance </h3
React JS has a unique feature called server-side rendering, which allows users to see the page before the JavaScript code is even downloaded. This feature drastically improves the performance of the page, as the user doesn’t have to wait for the JavaScript to load before seeing the content. Additionally, React JS uses it's own virtual DOM system in order to optimize the user's experience by quickly updating only the changes that have been made instead of refreshing the entire page.


React JS is widely known as the most popular JavaScript library these days, with many experienced developers turning towards it to create interactive user interfaces. But with the wide acceptance and use of this powerful framework, one question remains: is React JS a server side or client side script?
To answer this thought-provoking question, we must look at the core characteristics of this modern web technology. First of all, React JS is all about creating user interfaces on the same web page – something that the client-side browsers can easily handle. This means that the users, or clients, are the ones who get to interact with the interface, and it is their browser that runs the React JS script.
Even though React JS is able to run on both the server and the client side, the main purpose remains the same. It helps developers create a dynamic and interactive user experience that can be easily managed through the browser. Thus, React JS is mainly a client side script. However, if the developers want to make use of server-side features, such as saving and retrieving data from the database, they might still rely on combination of server side programming language like PHP or node.js.
At the end of the day, React JS is one of the most powerful modern web technologies for creating remarkable user interfaces, and developers should stay up to date with the latest releases. We at [blog] strongly advise our readers to follow us and stay informed about the upcoming events, stories and tutorials.
Going further, we have also prepared a Frequently Asked Questions section that can help you master the world of React JS and other modern web technologies:
Q1: What is React JS?
React JS is a JavaScript library created by the tech giant Facebook which is used to develop robust and user-friendly web and mobile apps. It helps developers create interactive user interfaces more efficiently.
Q2: What type of script is React JS?
React JS is mainly a client-side script, meaning it runs on the browser that the user or the client is using. Nevertheless, it is possible to perform server-side operations with combinations of other programming languages.
Q3: Where can I buy React JS?
As React JS is an open-source web library, you can download it for free at the official website. However, there are countless online courses and tutorials available which you can purchase to help you master React or other web technologies.
Q4: How can React JS improve my web project?
React will make it easier for you to create a dynamic and interactive user experience, due to its lightweight library. Additionally, it will make your project more productive and easier to work with.
Q5: Should I use React JS on server side?
Whilst React JS can be used for server-side operations, it is generally advised against as it is a client-side language. Using combinations of other programming languages, such as PHP or node.js, might yield better results when running server-side tasks.

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