Debugging Containerized React Apps

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In your lifetime as a frontend developer that works with React, you must have come across several issues with debugging a containerized React application. I bet you can relate, you’re certainly not alone. Containerization has become an integral part of best practices for software development teams that want to create, test and deploy applications quickly and efficiently. However, despite its advantages, it also comes with new challenges for debugging and troubleshooting applications.

In this blog post, we’ll explore the top things you need to know about debugging containerized React apps. We’ll take a look at some of the most common challenges that developers face when debugging containerized React applications, and finally, we’ll deep dive into some of the best practices for debugging them. Whether you’re a seasoned developer or someone just starting with containerization and React, this article will provide you with valuable insights and practical tips on the subject matter. 

Challenges of debugging containerized React apps

As mentioned earlier, debugging containerized React applications can come with several difficulties. Containerization has its many advantages but it can also introduce some complexities that can make debugging more challenging. In this section, we’ll explore some common challenges that developers face when trying to debug containerized React applications.

Lack of Transparency

A major challenge when it comes to debugging containerized React apps is the lack of transparency into the core/underlying infrastructure. In containerization, parts of the containerized application are often distributed across multiple containers, this can be a good thing but in terms of debugging, it can make it difficult to identify the cause of an issue when one arises. Additionally, containerized applications usually run in dynamic environments and in a loop where containers are constantly created, updated and destroyed. This unique nature of containerized apps can make it challenging to keep track of the application’s current state.

The Complexity of Microservices Architecture

Another challenge when debugging containerized React applications is the complexity of microservice architectures. Microservices architecture is a common approach for building complex applications where the application consists of multiple smaller services. In a microservices architecture, each service is responsible for a specific function of the application. Services use APIs to communicate with each other, which can be complex and difficult to troubleshoot. A problem in one service can impact other services and affect the overall performance of your application.  

Additionally, microservices architectures often involve multiple development teams, each responsible for its own service. This can make it difficult to coordinate debugging efforts, especially if your team is spread across different locations and time zones. Each team may use different technologies and tools, which can make it difficult to identify the root cause of issues across multiple services.

Container Orchestration

Container orchestration tools like Kubernetes and Docker Swarm have become essential for managing containerized applications. However, using these tools can introduce additional complications when debugging. For example, container orchestration can introduce network latency that can impact application performance. 

Additionally, container orchestration can make it difficult to troubleshoot issues arising from differences between development and production environments. For example, a containerized React application can work perfectly in development but may run into issues when deployed in production. Identifying the root cause of such problems can be difficult due to container orchestration.

In the next section, we’ll explore some of the common debugging tools that developers can use to overcome these challenges.

Common Debugging Tools for Troubleshooting Containerized React Apps

We’ve established the fact that debugging containerized React applications can be challenging. Despite the challenges, some tools make the whole process of debugging these applications better and much more efficient. In this section, we’ll explore some common tools that can be used for debugging containerized React apps.

Console logs for identifying errors

When working with containerized React applications, it is important to make use of the console.log()statement. The console helps you quickly identify errors and debug your application. Nothing beats plain old console.log(), one of the most effective debugging tools known to man. In a containerized application, you can use the console.log() statement just as you would in any web application. 

Using console.log() statements throughout your codebase can help you pinpoint where problems are occurring. Developers can use console.log to track variables, state changes, or other useful information to help track down the root cause of issues.

Using React DevTools in a Containerized Environment

React DevTools is a browser that enables React developers to view their component hierarchy in an interactive mode. React DevTools can be used as a debugging tool in a containerized environment to debug a React application’s components.

Developers can use React DevTools to inspect React components, view the current state of the application, and debug issues. React DevTools can be installed as a browser extension or as part of the developer tools in Chrome.

Debugging with VS Code

Visual Studio Code is a popular code editor that provides built-in debugging tools that can be used to debug containerized React applications. Developers can use VS Code’s debugger to set breakpoints, inspect variables, and step through code to identify issues. This can be especially helpful when trying to identify issues with specific functions or components.

VS Code also provides a variety of extensions that can be used to enhance debugging, such as the Docker extension, which can be used to monitor container logs and manage containers.

Debugging with Browser DevTools

Developer Tools (DevTools) are a set of web developer tools built into a browser. It provides a variety of tools that can be used to debug web applications, including containerized React applications. Developers can use the DevTools in any major browser to inspect HTML, CSS, and JavaScript, as well as view network requests, console logs, and other diagnostic information.

DevTools can be especially useful for debugging layout and styling issues in a containerized React application. Developers can use the Elements tab to inspect the DOM tree and CSS styles, and the Console tab to debug JavaScript code.

These tools can be used standalone or in combination depending on the specific needs of the project. Using these tools, developers can simplify the debugging process and ensure that their containerized React applications run smoothly and always meet the needs of end-users.

Best Practices for Debugging Containerized React Apps

Implementing certain best practices can simplify the process of debugging containerized React apps and save you time. In this section, we explore some of the most effective ways to debug containerized React apps. From isolating components to implementing automated tests, these practices can help streamline the debugging process and ensure your app performs optimally. Let’s dive in!

Isolate Components

Isolating components is a major best practice for debugging containerized React applications. This refers to building your application and breaking it down into smaller and more maintainable parts. When this is done, it’ll be easy for developers to figure out and fix issues that may arise. Developers will be able to fix specific issues without having to touch any other parts of the application.

Isolating components can be done by creating individual containers for each component that is independent of the other. This will allow developers to work on these components in isolation. 

Keep it Simple

Another key best practice for debugging containerized React applications is to keep things simple. It’s often advisable to avoid overly complex solutions and instead focus on finding the simplest solutions that can effectively solve the bug at hand. Overcomplicating things can actually lead to more errors and make it more difficult to identify and fix issues.

Keeping things simple can make it easier to pinpoint the root cause of the issue and come up with a targeted solution. By approaching debugging in a methodical and organised way, developers can save time and reduce frustration in the long run.


Logging plays a crucial role in debugging containerized React applications. It allows developers to track how the application is functioning and identify any problems that arise. But to get the most out of logging, it’s important to follow best practices that ensure the logs are helpful and not overwhelming.

To achieve this, developers should log at appropriate levels, avoid logging any sensitive information, and use structured logging to make the logs easier to search and analyse. By adhering to logging best practices, developers can more easily identify and address issues in their containerized React applications, leading to a smoother and more efficient debugging process.

Use of Environment Variables

Environment variables are a handy way of managing application configuration, and they can be especially useful when debugging containerized React applications. By using environment variables, developers can alter application settings without having to touch the code. This can help to pinpoint issues and make it easier to isolate them.

For example, developers can leverage environment variables to adjust the logging level or enable/disable certain features. By utilising environment variables, developers can more easily notice and troubleshoot issues in their containerized React apps, which leads to a more efficient and streamlined debugging process.

Debugging in Development Mode

Debugging containerized React applications in development mode can be a valuable tool for developers. By running the application with debugging tools enabled, developers can gain insights into the application’s state and quickly identify any issues.

Development mode allows developers to inspect the application’s state, view logs, and even step through the code line by line. This level of detail can help pinpoint the exact location of an issue and streamline the debugging process.

With the help of development mode, developers can more easily identify and resolve issues in their containerized React applications, ultimately leading to a better user experience.

Monitoring and Alerting Techniques

Developers can take advantage of monitoring and alerting techniques to identify and resolve issues in their containerized React applications before they escalate into critical problems. Monitoring tools can be utilized to keep track of the application’s performance and detect potential issues.

Setting up alerts can further help developers by enabling them to receive real-time notifications about possible issues. This allows developers to address and resolve the detected issues promptly before they cause significant disruptions or impact end-users. By leveraging monitoring and alerting techniques, developers can ensure that their containerized React applications run seamlessly and provide a top-notch user experience.

Automated Testing

Automated testing is an incredibly valuable tool for ensuring that containerized React applications are functioning as they should. By setting up automated tests, developers can catch potential issues before they’re deployed, which can save them lots of time and headaches down the line.

Automated tests can be used to check individual components as well as the entire application and can be incorporated into the continuous integration and deployment (CI/CD) pipeline. By running these tests automatically, developers can quickly identify and fix issues in their containerized React applications, saving them the hassle of having to manually test everything every time a change is made.

By implementing automated testing  strategies, developers can more effectively debug and resolve issues that may arise in their containerized React applications. This empowers them to guarantee that their applications are functioning as intended, delivering high-quality user experiences.


In this blog post,  we discussed the challenges developers face when debugging containerized React applications and provided best practices for addressing these challenges. We also emphasised the importance of isolating components, simplifying solutions, and integrating logging for effective debugging. We also covered the benefits of using environment variables and debugging in development mode.

Finally, we highlighted monitoring and alerting techniques and the importance of automated testing in identifying issues beforehand and fixing these issues. By following these best practices, developers can more easily ensure that their containerized React applications are running smoothly and meeting the needs of end-users.

Debugging containerized React applications can be a daunting task, but with proper use of best practices, developers can more easily identify and fix issues. With the integration of effective monitoring and automated testing techniques, developers can prevent potential issues from becoming critical and ensure that their applications are performing optimally.