What is cons of ReactJS?

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No technology is perfect, and this is especially true in the programming world. ReactJS is no exception, despite being one of the most powerful and popular tools around. Before deciding whether ReactJS is the right tool for your project, it is worth considering whether the cons of the framework outweigh the cons. This article seeks to help you answer this question by exploring the cons of ReactJS, and why it may or may not be suitable for your specific project.

The main concern about ReactJS is its steep learning curve. The complexity of the framework can sometimes make it difficult to use, especially for those with limited programming knowledge. For most developers, it is necessary to spend considerable time learning the nuances of the system, such as its component-based architecture and the JSX syntax. What’s more, React is not as well-documented or widely supported as other frameworks, making it difficult to find solutions to common problems.

In this article, you will learn more about the cons of ReactJS, and how the disadvantages of the platform can be mitigated. We will explore how the complexity of the framework adds an extra layer of difficulty to the development process, as well as how the lack of widespread support can make debugging challenging. We will then look at what the disadvantages of the platform actually mean, and why they may influence your decision of whether to use ReactJS for your project.

Finally, we will consider the potential benefits and drawbacks of choosing another framework instead. We will also take into account the differences between frameworks, as well as the best ways of ensuring that ReactJS is used properly and efficiently.

What is cons of ReactJS?


The main con of ReactJS is that it can be very difficult to learn for non-technical users due to its complexity. ReactJS is a JavaScript-based library used to build user interfaces. It is one of the most popular and widely used frameworks in web development. ReactJS provides developers with a powerful framework for creating robust applications that can easily be scaled and adapted, however, it can be an intimidating library for some developers who are unfamiliar with it.
Developers need to understand the principles of ReactJS and how to build an efficient user interface. It requires knowledge of component-based design principles and JavaScript. ReactJS can also be difficult to debug as the code can become complex and difficult to read. It is also not well supported by some older browsers so developers need to be familiar with working around these issues.
ReactJS also requires a lot of dedication and effort from developers in order to create high-quality applications. Since it is open-source, developers are constantly learning and updating their code to keep their applications up to date and reliable. Despite its complexity, ReactJS is often considered the best choice for developers looking to create robust, modern applications.
In addition, ReactJS is only compatible with certain web technologies such as Node.js, which may limit its use to certain developers. This can be a barrier for developers who are not familiar or comfortable with these technologies. There are also some performance-related issues that have been reported with ReactJS code, which can be difficult to identify and diagnose.
In summary, ReactJS is an extremely powerful and flexible framework for web development, but this comes with a certain level of complexity. For less experienced developers, ReactJS can be an intimidating library to master. Learning the principles of ReactJS and how to debug complex application code is necessary to be successful. In addition, developers should be aware of the potential issues such as the incompatibility with certain web technologies and the potential for performance-related downfalls. Despite these issues, ReactJS is often still considered the best choice for developers looking to create reliable, scalable applications.


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ReactJS: Adverse Effects on Performance

Effects on Server Resources

ReactJS is a powerful JavaScript library for building user interfaces for websites and applications. While ReactJS is useful for creating dynamic experiences, it does have some potentially adverse effects on performance due to its focus on real-time DOM updates. The need to update the DOM in real-time can lead to a significant strain on server resources. This can be especially true for websites or applications with large or complex user interfaces. ReactJS does offer various methods of limiting the number of DOM updates, such as using the Virtual DOM, but it can still lead to a drain on server resources.

Effects on Website Speed

Due to the real-time nature of ReactJS, the performance of a website or application can be impacted in terms of end user experience. For example, if the ReactJS components need to constantly update the DOM, then the end user may have to wait for these updates to finish before they can interact with the website. Furthermore, ReactJS components may also be larger than their HTML counterparts, further slowing down the loading time of the website or application.

DOM Manipulation

DOM manipulation is a key feature of ReactJS and enables developers to create and update dynamic pages and user experiences. However, the constant manipulation of the DOM can have a negative effect on performance. This is especially true for websites or applications with complex user interfaces or numerous DOM elements. For example, if the DOM element needs to be updated frequently, then the website performance is likely to suffer as a result.


The complexity of ReactJS and the use of components can make it more difficult for developers to troubleshoot performance issues. This can be even more problematic for websites and applications with larger, more complex user interfaces. ReactJS components are typically larger than their HTML counterparts, and this can lead to developers spending more time and effort assessing and understanding the components when troubleshooting performance issues.

Lack of Best Practices and Guidelines

Despite its popularity, ReactJS does not have a comprehensive set of best practices or guidelines when it comes to performance. This can make it difficult for developers to ensure they are developing applications or websites that are optimised for optimal performance. Furthermore, due to the nature of ReactJS development, the code changes frequently and this can interact with the performance of the website or application negatively.

Impact of Third-Party Libraries

ReactJS developers often utilise third-party libraries to speed up the development process. However, using third-party libraries can have a negative impact on the performance of the website or application. This is because third-party libraries can add additional layers on top of the ReactJS components and this can reduce the overall performance of the website or application.

Pros and Cons of using ReactJS

  • Pros: ReactJS is great for building highly dynamic user interfaces, offers server-side rendering options, and good data flow.
  • Cons: ReactJS can lead to a strain on server resources, increase website load time, and has a lack of best practices and guidelines.

Negative Impact of ReactJS on User Experience

Slow Performance

One of the most commonly reported cons of using ReactJS is its slower performance compared to more traditional technologies, as perceived by some users. While users of React may find that it allows them to create complex websites quickly, without sacrificing user experience, performance can still be a limitation. ReactJS has the ability to give feedback on failed requests quickly, which can be useful in creating a more efficient web application. However, the speed at which interactive components are rendered can differ widely, depending on the complexity of the data being rendered. This may lead to a slower user experience, as a large number of components are rendered at once, potentially leading to longer wait times for complex data.

Lack of Documentation

The functionality of ReactJS is open-ended, meaning there is a lack of structure that can often be found in more documented frameworks. This lack of documentation makes it difficult for novice React developers to properly understand the platform and accurately assess its features. A React user may struggle to develop complex applications that utilise the platform’s power, instead, may opt to utilise react libraries and plugins that enable a smoother development process, but can also lead to a higher complexity and need for maintenance.

Risk of Bugs and Incompatibility

The lack of structure embedded in React can also raise the risk of bugs being introduced into the code. When using open-ended libraries, such as those available with React, developers may make decisions about their application that can lead to incompatibility down the line. If an element or feature of the application does not work as intended, it can be difficult to pinpoint the reason why. Furthermore, when developing for React, the execution of code is often deferred, meaning developers may not be aware of compatibility issues until late in the development process. This can create a resource intensive debugging process that can extend project timelines, redirect the focus of the development team and incur additional maintenance costs.
Thought-provoking question: How can React developers ensure their applications are both innovative yet maintain compatibility and performance levels throughout the development process?
The key idea is that while ReactJS is an open-ended platform with plenty of opportunity to create complex applications, maintaining performance, compatibility, and bug-free code is a challenge due to its lack of structure. Best practices to overcome this challenge include staying up-to-date on libraries and plugins, keeping documentation up-to-date, and rigorously testing throughout the development process.

Challenges of ReactJS Development


Having the ability to customize almost every aspect of an application is one of its greatest advantages. However, this same feature can become one of the drawbacks when it comes to ReactJS development. Too much customizability can lead to a lack of standardization. With developer’s freedom of choice comes the possibility for errors, such as lack of consistency, and the need for extensive testing. This can be especially tricky for large or complex applications. After all, how can you ensure that all your customization choices are error-free and work together harmoniously?

Difficult Debugging

ReactJS development can be difficult, because one error in the code can throw off the entire application. Identifying errors can be tricky, since they tend to be scattered throughout the code. It’s also not easy to identify how problematic elements affect the whole application, since ReactJS uses virtual DOM to make code modifications. How can a developer be sure that a single code change won’t affect applications performance?
Thought-provoking question would be: Is there a way to minimize the problems related to ReactJS customizability and difficult debugging? Fortunately, the answer is yes. The key is to establish a set of best practices for your ReactJS development. Here are a few examples.
First, you should use a coding style guide to ensure a consistent coding style across the entire application. All the developers on the team should use the same guide and consistently apply it for all the code they write. Coding style guides are especially important for React and Redux applications, since their sources of truth can create a lot of confusion.
Second, you should use the same version of React throughout the application. Even minor version differences can result in a lot of unexpected issues. You should be using the same version of React for your front-end and back-end, as well. On the inside, both React and Redux must be consistent for the front-end and the back-end.
Finally, you should fully test your application before release. This means testing everything from simple components and functions to the entire platform. You should also consider running integration tests on a regular basis to ensure that all components are running properly.
By following these best practices, you can minimize the problems related to ReactJS customizability and difficult debugging. It’s also important to have a centralized system in place to document all changes done during day-to-day operations. This way, you can go back and troubleshoot any potential problems in the future.


ReactJS has formed the basis of an entire modern development world, and for good reason too. It is a powerful library backed by Facebook and provides developers with the ability to create complex user interfaces and apps quickly and with a clean syntax. But despite its potential, ReactJS is not without its flaws. This article has taken an in-depth look at the pros and cons of ReactJS, to help developers make an informed decision before utilizing the library.
Do we really understand the long-term consequences of using ReactJS in our projects? With its changing environments and an ever-evolving feature set, there is so much to consider. However, no matter the pros and cons associated with we can all agree that ReactJS is an invaluable resource in the development world, and it will undoubtedly continue to remain that way for many years to come.
If you would like to stay up to date with the latest ReactJS tips and tricks, then be sure to follow our blog. As the library continues to grow and evolve, we will keep you posted with the new features and releases. So don’t miss out – stay tuned for more by subscribing today!


Q1. What are the limitations of ReactJS?
A1. One of the main limitations of ReactJS is that it only handles the view layer of the application. It is not a complete framework and does not offer a lot in terms of services such as routing. Also, it is constantly changing and evolving, meaning that developers need to be kept up-to-date with the latest changes. Additionally, it can be quite complex to integrate with other libraries or frameworks. Finally, it is not suitable for single-page applications or websites that require high speed.
Q2. Why does ReactJS have a steep learning curve?
A2. ReactJS is based on JavaScript, meaning that developers must be familiar with it in order to be able to use ReactJS effectively. Additionally, it has a large number of concepts and components which can be intimidating for beginners. The JSX syntax also adds an extra layer of complexity as it requires developers to think differently. Finally, React has its own ecosystem of libraries and tools which need to be understood in order to be used effectively.
Q3. How secure is ReactJS?
A3. ReactJS is considered to be secure, however, as with any client-side technology, there are certain risks that need to be taken into account. Because ReactJS applications run on the user’s browser, the user’s data is exposed to malicious actors. Additionally, developers must ensure that all data processing is performed securely, and any user input is validated to ensure that it is legitimate.
Q4. What is server-side rendering in ReactJS?
A4. Server-side rendering (SSR) is a technique used by ReactJS to render components on the server, rather than the client. This technique allows for faster page loads, as the server sends an initial HTML response to the browser, which can be rendered quickly. This also improves SEO, as crawlers are able to crawl the page correctly.
Q5. Is ReactJS suitable for mobile development?
A5. Yes, ReactJS is suitable for mobile development, thanks to tools such as React Native and Expo. React Native allows developers to build mobile apps using JavaScript and React, and Expo provides a set of tools that can be used to create cross-platform apps. Additionally, there are libraries such as ReactXP which can be used to share code between web and Native applications.